C&EN em Português - American Chemical Society

<!DOCTYPE HTML> <html lang="en"> <head> <meta name="template" content="base-page-template"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <script defer="defer" type="text/javascript" src="/.rum/@adobe/helix-rum-js@%5E2/dist/rum-standalone.js"></script> <link rel="canonical" href="/collections/portugues.html"/> <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate"/> <meta http-equiv="Pragma" content="no-cache"/> <meta http-equiv="Expires" content="0"/> <meta charset="UTF-8"/> <meta http-equiv="x-ua-compatible" content="ie=edge"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"/> <title> C&EN em Português - American Chemical Society </title> <meta property="og:title"/> <meta property="og:site_name" content="Chemical & Engineering News"/> <meta property="og:description" content="Portuguese translations of C&EN's best weekly chemistry news, provided in collaboration with the Sociedade Brasileira de Química"/> <meta property="og:image" content="https://cen.acs.org/content/dam/cen/static/images/sitewide-default-images/site-cen-logo-social-default.jpg"/> <meta property="og:url" content="https://cen.acs.org/collections/portugues.html"/> <meta property="og:locale" content="en_US"/> <meta name="twitter:site" content="@cenmag"/> <meta name="twitter:creator" content="@cenmag"/> <meta name="twitter:title"/> <meta name="twitter:description" content="Portuguese translations of C&EN's best weekly chemistry news, provided in collaboration with the Sociedade Brasileira de Química"/> <meta name="description" content="Portuguese translations of C&EN's best weekly chemistry news, provided in collaboration with the Sociedade Brasileira de Química"/> <meta name="facebook-domain-verification" content="an25ujdd57jxj7j3n94vqa7wv6hww6"/> <link rel="icon" href="/content/dam/acs-cen-redesign/logo/favicon.ico" type="image/vnd.microsoft.icon"/> <link rel="shortcut icon" href="/content/dam/acs-cen-redesign/logo/favicon.ico" type="image/vnd.microsoft.icon"/>  <script async='async' src='https://www.googletagservices.com/tag/js/gpt.js'></script> <script> var gptadslots = []; var googletag = googletag || {cmd:[]}; </script>  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-MRZG95K3');</script>  <link rel="stylesheet" href="/etc.clientlibs/cen-cloud/clientlibs/clientlib_thirdparty.lc-03bc33241a203f6398eb7db1569fa4e9-lc.min.css" type="text/css"> <link rel="stylesheet" href="/etc.clientlibs/cen-cloud/clientlibs/clientlib_collections.lc-3763460f72b73da70d47aca4e17ec2b6-lc.min.css" type="text/css"> <script src="/etc.clientlibs/clientlibs/granite/jquery.lc-f9e8e8c279baf6a1a278042afe4f395a-lc.min.js"></script> <script src="/etc.clientlibs/cen-cloud/clientlibs/clientlib_thirdparty.lc-dc226b13ccf8cd5410bafcbaf57880bb-lc.min.js"></script> <script src="/etc.clientlibs/cen-cloud/clientlibs/clientlib_collections.lc-183be1b2868d43efdbe703a22cc80622-lc.min.js"></script> <script> function htmlEntities(str) { var elem = document.createElement('textarea'); elem.innerHTML = str; return elem.value; } var tagStack = []; var collectionStack = []; var digitalData = { 'pageInfo' : { 'pageName' : 'C\x26EN em Português \u002D American Chemical Society', 'contentType' : 'Collections Landing Pages', 'contentName' : 'Collections', 'collections' : '', 'department' : '', 'nfc' : htmlEntities('') } }; var _cbq = window._cbq || []; _cbq.push(['_contentType', digitalData.pageInfo.contentType]); _cbq.push(['_contentName', digitalData.pageInfo.contentName]); </script> <script> collectionStack.push('portugese'); </script>  <script src="//assets.adobedtm.com/822408db7b4a/5997dbcdb559/launch-440fa7e38116.min.js"></script> <script src="/etc.clientlibs/cen-cloud/clientlibs/clientlib_dfpads.lc-5992185d747223e67ed02b97171c451e-lc.min.js"></script> <script> var _sf_async_config = _sf_async_config || {}; /** CONFIGURATION START **/ _sf_async_config.uid = 61642; _sf_async_config.domain = window.location.hostname; _sf_async_config.flickerControl = false; //_sf_async_config.path = window.location.pathname; _sf_async_config.useCanonical = true; _sf_async_config.useCanonicalDomain = true; /** CONFIGURATION END **/ var s = document.createElement('script'); s.type = 'text/javascript'; s.src = '//static.chartbeat.com/js/chartbeat_mab.js'; var x = document.getElementsByTagName('script')[0]; x.parentNode.insertBefore(s, x); </script>  <script> googletag.cmd.push(function() { googletag.pubads().addEventListener('slotRenderEnded', function(event) { if (event.slot.getSlotElementId() == 'div-gpt-ad-8773544-1') { // console.log("Rendered Ad Size..: " + event.size); if(event.size!=null){ // console.log("HR Ad ON"); window.scrollTo(0,0); $('.leaderboard-top').remove(); // Hiding Header Leader Ad while Header Reveal Ad displaying var cssPaddingVal = $('body').css("padding-top"); // fix for removing space above Header Reveal Ad - Start if(cssPaddingVal == "55px") { $('body').css("padding-top","0px"); $('.mobile-nav').css("margin-top", "0px"); // fix for remove space which is displaying between navigation and Header reveal Ad $(window).scroll(function() { $('.mobile-nav').css("margin-top", "0px"); }); } // fix for removing space above Header Reveal Ad - End } else if(event.size===null){ // console.log("HR Ad OFF"); $('#div-gpt-ad-8773544-1').remove(); // Removing Header Reveal Ad DIV tag if Ad respose null (if enable 24hr cap functionality) } } }); }); </script> <div id='div-gpt-ad-8773544-1'> <script> googletag.cmd.push(function() { googletag.display('div-gpt-ad-8773544-1'); }); </script> </div>  </head> <body class="page basicpage" id="page-37ee988bc9" data-cmp-link-accessibility-enabled data-cmp-link-accessibility-text="opens in a new tab" data-cmp-data-layer-name="adobeDataLayer"> <div class="root responsivegrid"> <div class="aem-Grid aem-Grid--12 aem-Grid--default--12 "> <div class="genericAds aem-GridColumn aem-GridColumn--default--12"> <div class="leaderboard-top"> <h6 class="ads-title">Advertisement</h6> <div class="article-top-ads" id="div-gpt-ad-21681463464-1"> <script> googletag.cmd.push(function() { googletag.display('div-gpt-ad-21681463464-1'); }); </script> </div> </div> <script> $(".article-small-ads > h6").css("margin-bottom","0rem"); </script></div> <div class="experiencefragment aem-GridColumn aem-GridColumn--default--12"> <div class="xf-content-height"> <div class="root responsivegrid"> <div class="aem-Grid aem-Grid--12 aem-Grid--default--12 "> <div class="header aem-GridColumn aem-GridColumn--default--12"> <div id="page-loader" style="display:none;"><i class="fa fa-spinner fa-spin fa-3x" aria-hidden="true"></i></div> <div id="content2"> <div class="two_column_parsys"> <div id="two_column_parsys" class="bottomMargin"> <div id="article_text"> <div id="login_frame"></div> </div> </div> </div> </div> <header class="header-wrapper"> <div class="upper-nav show-for-large-nav"> <div class="grid-container "> <div class="grid-x grid-margin-x"> <div class="left-upper-nav large-6 cell"> <ul class="nav-link-parent"> <li class="nav-link-child"><a href="https://www.acs.org/" rel="noopener" target="_blank">ACS</a></li> <li class="nav-link-child"><a href="https://pubs.acs.org/" rel="noopener" target="_blank">Publications</a></li> <li class="nav-link-child active"><a>C&EN</a></li> <li class="nav-link-child"><a href="https://www.cas.org/" rel="noopener" target="_blank">CAS</a></li> </ul> </div> <div class="right-upper-nav large-6 cell"> <ul class="nav-link-parent right-nav"> <li class="nav-link-child pull-nav-right true signup"> <a href="#" class="join-acs-link-modal">Join ACS</a> </li> <li class="nav-link-child login"> <div/> <script type="text/javascript" src="/content/cen/misc/cen/js/user.js"></script> <script type="text/javascript" src="/content/cen/misc/cen/js/json_calls.js"></script> <span id="logintext"> <a href="#" onclick="showloginpopup(true); return false;"> <span> <i class="fa fa-lock"></i> </span> Log in </a> </span> <span id="logouttext" style="margin-left:20px;"><i class="fa fa-unlock"></i><a onclick="Logout(true)" href="#">Log out</a></span> <script type="text/javascript"> function showlogin(vis){ var frame = document.getElementById("login_frame"); var text = document.getElementById("main"); var dark= document.getElementById('darkenScreenObject'); var l = window.innerWidth/2 - 3900/2; var t = window.innerHeight/2 - 3200/2; var lstr = l+'px'; var tstr = t+'px' frame.style.display= "block"; frame.style.visibility = "visible"; var frames = document.createElement('iframe'); frames.src = '/content/cen/protectedPage.html'; frames.scrolling= 'no'; frame.appendChild(frames); text.style.visibility = "visible"; } function showloginpopup(vis){ $('body').addClass('mob-nav-open'); if((window.location.href).indexOf("type=paidArticleContent") > -1){ window.scrollBy(0,650); } else{ var frame = document.createElement("div"); frame.setAttribute("id", "login_frame"); var text = document.getElementById("content2"); var dark= document.getElementById('darkenScreenObject'); if(!dark){ setScreen(); dark=document.getElementById('darkenScreenObject'); } if (vis) { dark.style.visibility = "visible"; dark.style.zIndex=1001; var pageURL = window.location.href; var l = window.innerWidth/2 - 3900/2; var t = window.innerHeight/2 - 3200/2; var lstr = l+'px'; var tstr = t+'px' frame.style.display= "block"; frame.style.visibility = "visible"; window.location.href = '/content/cen/callingsso.html?pageURL='+pageURL; /* var frames = document.createElement('iframe'); frames.src = '/content/cen/callingsso.html?pageURL='+pageURL; frames.scrolling= 'no'; if(text.firstChild){ text.insertBefore(frame,text.firstChild); }else{ text.appendChild(frame); } */ frame.appendChild(frames); text.style.visibility = "visible"; }else{ dark.style.display='none'; dark.style.visibility = "hidden"; frame.style.display='none'; frame.style.visibility = "hidden"; text.style.visibility = "visible"; } } } function setScreen(){ var tbody = document.getElementsByTagName("body")[0]; var tnode = document.createElement('div'); // Create the layer. tnode.style.position='absolute'; // Position absolutely tnode.style.top='0px'; // In the top tnode.style.left='0px'; // Left corner of the page tnode.style.overflow='hidden'; // Try to avoid making scroll bars tnode.style.display='none'; // Start out Hidden tnode.id='darkenScreenObject'; // Name it so we can find it later tnode.style.opacity=0.8; tnode.style.MozOpacity=0.9; tnode.style.filter='alpha(opacity=70)'; tnode.style.zIndex=1001; tnode.style.backgroundColor='#000000'; tnode.style.width= '100%'; tnode.style.height= '100%'; tbody.appendChild(tnode); // Add it to the web page } function ClosePop() { $('#login_frame').remove(); $('body').removeClass('mob-nav-open'); } function Logout(){ $.ajax({url:"/acs/redirect", type: "POST", data: {username: "logout", uservalue: "logout" }, success: function(){ localStorage.removeItem('cenUser'); localStorage.removeItem('cenRenewUser'); window.location = "https://sso.acs.org/idp/service/glogout?appid=xxx&returnURL=https://"+window.location.hostname+"/"; } }); } function getCookie(name) { var re = new RegExp(name + "=([^;]+)"); var value = re.exec(document.cookie); return (value != null) ? unescape(value[1]) : null; } function loginAjaxCalls(){ if(true){ var call_url = 'https://sso.acs.org/idpservice/status'; var appid = "CENODSPublish"; var query_string = '?appid=' + appid; $.ajax({ url: call_url + query_string, type: 'GET', crossDomain: "true", contentType: "application/json; charset=utf-8", xhrFields: { withCredentials: true }, success: function( response ){ if( response.succ && response.results ){ var loggedin = response.results.loggedin; if (loggedin){ var ifrm = document.createElement("iframe"); ifrm.setAttribute("src", "/content/cen/callingsso.html"); ifrm.style.width = "640px"; ifrm.style.height = "480px"; ifrm.style.position= "fixed"; document.body.appendChild(ifrm); } } else { // do something when status lookup failed here //alert('status lookup fail'); } } }); } else { var env = "dev"; if (env == "prod"){ var call_url = 'https://sso.acs.org/idp/status'; } else { var call_url = 'https://sso.acs.org/idp/status'; } var appid = "CENODSPublish"; var query_string = '?padding=jsonPaddingFunction&appid=' + appid + '&pagemaxage=86400'; $.ajax({ type: 'get', dataType: 'jsonp', url: call_url + query_string, jsonpCallback: 'jsonPaddingFunction', contentType: "application/json", success: function( response ){ if( response.succ && response.results ){ var loggedin = response.results.loggedin; if (loggedin){ var ifrm = document.createElement("iframe"); ifrm.setAttribute("src", "/content/cen/callingsso.html"); ifrm.style.width = "640px"; ifrm.style.height = "480px"; ifrm.style.position= "fixed"; document.body.appendChild(ifrm); } } else { // do something when status lookup failed here //alert('status lookup fail'); } } }); } } function checkUserTypeD(){ var currentUserLocal = localStorage.getItem('cenUser'); var currentUserLocalDType = localStorage.getItem('cenRenewUser'); if (currentUserLocal !== null) { currenUserDecoded=JSON.parse(currentUserLocal); localStorage.removeItem('cenUser'); } } $(document).ready(function() { try { json_calls.execute(); } catch (error) { // To give IE 11 a breather } try{ var cookieValueFirst= getCookie('cenLogin'); if( cookieValueFirst == '' || cookieValueFirst == null || cookieValueFirst ==undefined) { $.ajax({url:"/acs/redirect", type: "POST", data: {username: "erlogin", uservalue: "erlogin" }, success: function(){ loginAjaxCalls(); } }); } ACS.User.getCurrentUser(getCookie('cenLogin')); if (ACS.User.getUserName(getCookie('cenLogin')) != "") { jsonData = { "method":"validate-username", "userId": ACS.User.getUserName(getCookie('cenLogin')) }; $.ajax({ type: "POST", headers: { "Api-Key":"K75kjsd//:765jh" }, url: "/acs/paywall", data: (btoa(encodeURIComponent(JSON.stringify(jsonData)))), dataType: "json", contentType: "application/json", success: function(json){ var currentUser = localStorage.getItem('cenUser'); if(currentUser === null) { var userJson = {'username' : json.data.userId, userType: json.data.userType}; localStorage.setItem('cenUser', JSON.stringify(userJson)); }else{ var userJson = JSON.parse(currentUser); userJson['username'] = json.data.userId; userJson['userType'] = json.data.userType; localStorage.setItem('cenUser', JSON.stringify(userJson)); } checkUserTypeD(); } }) } if (ACS.User.isLoggedIn() && !ACS.User.isInstitution()){ if(true){ var call_url = 'https://sso.acs.org/idpservice/status'; var appid = "CENODSPublish"; var query_string = '?appid=' + appid; $.ajax({ url: call_url + query_string, type: 'GET', crossDomain: "true", contentType: "application/json; charset=utf-8", xhrFields: { withCredentials: true }, success: function( response ){ if( response.succ && response.results ){ var loggedin = response.results.loggedin; } }, failure: function(response){ console.log(response); } }); } else { var env = "dev"; if (env == "prod"){ var call_url = 'https://sso.acs.org/idp/status'; } else { var call_url = 'https://sso.acs.org/idp/status'; } var appid = "CENODSPublish"; var query_string = '?padding=jsonPaddingFunction&appid=' + appid + '&pagemaxage=86400'; $.ajax({ type: 'get', dataType: 'jsonp', url: call_url + query_string, jsonpCallback: 'jsonPaddingFunction', contentType: "application/json", success: function( response ){ if( response.succ && response.results ){ var loggedin = response.results.loggedin; } }, failure: function(response){ console.log(response); } }); } $("#logintext").html("Hi, <span class='capitalise-username'>" + ACS.User.getFirstName() + "! </span>"); $("#logouttext").show(); $('.nav-link-child.true.signup').hide(); $("#logintext").css("padding-top","3px"); $("#logouttext").css("display","inine-block"); $('#mobile-login-btn1').hide(); $('.welcome-mob-tecxt').html("Hi, " + ACS.User.getFirstName() + "!"); $('#loggggout').show(); } } catch(e){ //alert(e); } }); </script> </li> </ul> </div> </div> </div> </div> <nav class="main-nav show-for-large-nav"> <div class="grid-container"> <div class="grid-x grid-margin-x"> <div class="left-nav large-12 cell"> <ul class="main-nav-parent"> <li class="main-nav-child logo-parent-nav"> <a class="logo-link nav-element" href="/"> <img class="logo logo-large" src="/content/dam/acs-cen-redesign/logo/cen-logo.png" alt="Chemical & Engineering News" title="Chemical & Engineering News"/> <img class="logo logo-small" src="/content/dam/acs-cen-redesign/logo/cenLogo-120.png" alt="Chemical & Engineering News" title="Chemical & Engineering News"/> </a> </li> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/most-recent.html" class="nav-element topic-pane">LATEST </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/most-recent.html">LATEST <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="TOPICS-dropdown" class="nav-element topic-pane">TOPICS <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="TOPICS-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/analytical-chemistry.html">Analytical Chemistry</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/biological-chemistry.html">Biological Chemistry</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/business.html">Business</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/careers.html">Careers</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/education.html">Education</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/energy.html">Energy</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/environment.html">Environment</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/food.html">Food</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/materials.html">Materials</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/people.html">People</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/pharmaceuticals.html">Pharmaceuticals</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/physical-chemistry.html">Physical Chemistry</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/policy.html">Policy</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/research-integrity.html">Research Integrity</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/safety.html">Safety</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/synthesis.html">Synthesis</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/acs-news.html">ACS News</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">TOPICS</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/topics/analytical-chemistry.html">Analytical Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/biological-chemistry.html">Biological Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/business.html">Business</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/careers.html">Careers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/education.html">Education</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/energy.html">Energy</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/environment.html">Environment</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/food.html">Food</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/topics/materials.html">Materials</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/people.html">People</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/pharmaceuticals.html">Pharmaceuticals</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/physical-chemistry.html">Physical Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/policy.html">Policy</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/research-integrity.html">Research Integrity</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/safety.html">Safety</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/synthesis.html">Synthesis</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/acs-news.html">ACS News</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="MAGAZINE-dropdown" class="nav-element topic-pane">MAGAZINE <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane single-column-width" id="MAGAZINE-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-12"> <li class="nav-link-child"><a class="nav-child-link" href="/magazine/102/10237.html">Current Issue</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/magazine/all-issue.html">Recent Issues</a></li> <li class="nav-link-child"><a class="nav-child-link" href="https://pubs.acs.org/loi/cgeabj">Archives: 100 Years of C&EN</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">MAGAZINE</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/magazine/102/10237.html">Current Issue</a></li> <li class="menu-item"> <a class="nav-child-link" href="/magazine/all-issue.html">Recent Issues</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="https://pubs.acs.org/loi/cgeabj">Archives: 100 Years of C&EN</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="FEATURES-dropdown" class="nav-element topic-pane">FEATURES <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="FEATURES-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/CENs-10-Start-ups-to-Watch.html">10 Start-ups to Watch</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/cen-centennial.html">C&EN's Centennial</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/CENs-Talented-12.html">Talented Twelve</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/Trailblazers.html">Trailblazers</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/global-top-50.html">Global Top 50 chemical firms</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/us-top-50.html">US Top 50 chemical firms</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">FEATURES</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/collections/CENs-10-Start-ups-to-Watch.html">10 Start-ups to Watch</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/cen-centennial.html">C&EN's Centennial</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/CENs-Talented-12.html">Talented Twelve</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/sections/Trailblazers.html">Trailblazers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/global-top-50.html">Global Top 50 chemical firms</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/us-top-50.html">US Top 50 chemical firms</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="COLLECTIONS-dropdown" class="nav-element topic-pane">COLLECTIONS <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="COLLECTIONS-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/amazing-women-chemistry.html">Amazing Women of Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/bench-cubicle.html">Bench & Cubicle</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/career-ladder.html">Career Ladder</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/in-memoriam.html">In Memoriam</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/movers-and-shakers.html">Movers and Shakers</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/newscripts.html">Newscripts</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/nobel-prize-chemistry.html">Nobel Prize in Chemistry</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/office-hours.html">Office Hours</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/opinion.html">Opinion</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/periodicgraphics.html">Periodic Graphics</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/quizzes.html">Quizzes</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/sketch-chemistry.html">Sketch Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/speaking-of-chemistry.html">Speaking of Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/whats-that-stuff.html">What's That Stuff?</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/arabic.html">باللغة العربية C&EN</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/espanol.html">C&EN en Español</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/chinese.html">C&EN中文版</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/portugues.html">C&EN em Português</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/webinars.html">C&EN Webinars</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/whitepapers.html">C&EN White Papers & eBooks</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">COLLECTIONS</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/sections/amazing-women-chemistry.html">Amazing Women of Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/bench-cubicle.html">Bench & Cubicle</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/career-ladder.html">Career Ladder</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/in-memoriam.html">In Memoriam</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/movers-and-shakers.html">Movers and Shakers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/newscripts.html">Newscripts</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/nobel-prize-chemistry.html">Nobel Prize in Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/office-hours.html">Office Hours</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/opinion.html">Opinion</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/periodicgraphics.html">Periodic Graphics</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/collections/quizzes.html">Quizzes</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/sketch-chemistry.html">Sketch Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/speaking-of-chemistry.html">Speaking of Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/whats-that-stuff.html">What's That Stuff?</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/arabic.html">باللغة العربية C&EN</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/espanol.html">C&EN en Español</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/chinese.html">C&EN中文版</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/portugues.html">C&EN em Português</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/webinars.html">C&EN Webinars</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/whitepapers.html">C&EN White Papers & eBooks</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/sections/stereo-chemistry-podcast.html" class="nav-element topic-pane">PODCASTS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/sections/stereo-chemistry-podcast.html">PODCASTS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/collections/chemistry-in-pictures.html" class="nav-element topic-pane">CHEMPICS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/collections/chemistry-in-pictures.html">CHEMPICS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="https://chemistryjobs.acs.org/" class="nav-element topic-pane">JOBS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="https://chemistryjobs.acs.org/">JOBS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <li class="main-nav-child"> <a class="nav-element nav-search-element" data-toggle="search-dropdown" href="javascript:void(0)"><i class="fa fa-search"></i></a> <div class="dropdown-pane nav-pane multimedia-pane" id="search-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-12"> <li class="header-nav-child"> <form role="search" method="get" class="search-form ng-pristine ng-valid nav-child-link" onsubmit="performSearchH();$('.search-field').val(''); return false"> <input type="search" class="search-field form-control" placeholder="Search …" value="" name="q" id="q" title="Search for:"/> <input type="submit" class="search-submit btn btn-primary" value="Search"/> </form> <a class="nav-child-link" href="/search.html">Advanced Search</a> </li> <li class="header-nav-child"></li> </ul> </div> </div> </li> <ul class="main-nav-parent social-footer-container"> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.facebook.com/CENews" target="_blank" title="Facebook"> <i class="fa fa-facebook social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.instagram.com/cenmag/" target="_blank" title="Instagram"> <i class="fa fa-instagram social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://twitter.com/cenmag" target="_blank" title="X"> <i class="fa fa-twitter social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.linkedin.com/showcase/c&en/" target="_blank" title="LinkedIn"> <i class="fa fa-linkedin social-link-icon"></i> </a> </li> </ul> </ul> </ul> </div> </div> </div> </nav> <div> <nav class="hide-for-large-nav"> <div class="grid-container-fluid"> <div class="grid-x grid-margin-x"> <div class="large-12 cell"> <div class="mobile-nav"> <div class="float-center logo-parent"> <div class="float-left"> <a href="javascript:void(0)" data-toggle="mobile-dropdown"></a> <a href="javascript:void(0)" class="mobile-burger"> <i class="fa fa-reorder"></i> </a> </div> <a class="logo" href="/index.html" rel="home"> <img title="Chemical & Engineering News" class="logo logo-small" src="/content/dam/acs-cen-redesign/logo/cenLogo-120.png" alt="Chemical &#38; Engineering News"/> </a> <div class="float-right"> <a href="https://www.acs.org/bin/acs/sso/login" onclick="showloginpopup(true); return false;" title="Login" class="mobile-login-btn" id="mobile-login-btn1"> <i class="fa fa-user"></i> </a> <a href="javascript:void(0)" data-toggle="logout-dropdown" class="mobile-login-btn" style="height:40px;display:none;" id="loggggout"> <i class="fa fa-user"></i> </a> <div class="dropdown-pane logout-pane" id="logout-dropdown" data-dropdown style="width:150px;"> <div class="grid-x"> <ul class="cell large-12" style="margin-left: 0;margin-bottom:0;margin-right:0;"> <li class="logout-child welcome-mob-tecxt" style="color: #243241;background: #ffffff;text-shadow: none;font-family:'Franklin ITC';font-size:13px;"> Welcome, </li> <li class="logout-child"> <span id="logouttext1"><i class="fa fa-unlock" style="margin-right:10px;"></i><a onclick="Logout(true)" href="javascript:void(0)" style="color:#EC272D;font-size:14px;">Log out</a></span> </li> </ul> </div> </div> </div> </div> </div> </div> </div> </div> <div class="dropdown-pane nav-pane mobile-dropdown" id="mobile-dropdown" data-dropdown> <div class="grid-container-fluid"> <div class="grid-x grid-margin-x"> <div class="large-12 cell"> <div class="mobile-nav-menu"> <div class="float-center logo-parent"> <div class="float-left"> <a class="logo mobile-log-pos" href="/index.html" rel="home"> <img title="Chemical & Engineering News" class="logo logo-small" src="/content/dam/acs-cen-redesign/logo/cenLogo-120.png" alt="Chemical &#38; Engineering News"/> </a> </div> <div class="float-right"> <a href="#" target="_blank" title="Log in" class="mobile-close">×</a> </div> </div> </div> <div class="large-12 cell"> <div class="scroll"> <div class="scroll-wrap grid-x"> <ul class="large-12 small-12 medium-12 cell parent-ul-menu"> <li class="search"> <form onsubmit="performSearchMobile(); return false"> <input type="text" id="mobile-search-box" placeholder="Search C&EN" required=""/> <button>Go</button> </form> </li> </ul> <ul class="large-12 small-12 medium-12 cell parent-ul-menu"> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/most-recent.html" class="nav-element topic-pane">LATEST </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/most-recent.html">LATEST <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="TOPICS-dropdown" class="nav-element topic-pane">TOPICS <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="TOPICS-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/analytical-chemistry.html">Analytical Chemistry</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/biological-chemistry.html">Biological Chemistry</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/business.html">Business</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/careers.html">Careers</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/education.html">Education</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/energy.html">Energy</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/environment.html">Environment</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/food.html">Food</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/materials.html">Materials</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/people.html">People</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/pharmaceuticals.html">Pharmaceuticals</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/physical-chemistry.html">Physical Chemistry</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="header-nav-child"><a class="nav-child-link" href="/topics/policy.html">Policy</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/research-integrity.html">Research Integrity</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/safety.html">Safety</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/synthesis.html">Synthesis</a></li> <li class="header-nav-child"><a class="nav-child-link" href="/topics/acs-news.html">ACS News</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">TOPICS</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/topics/analytical-chemistry.html">Analytical Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/biological-chemistry.html">Biological Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/business.html">Business</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/careers.html">Careers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/education.html">Education</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/energy.html">Energy</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/environment.html">Environment</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/food.html">Food</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/topics/materials.html">Materials</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/people.html">People</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/pharmaceuticals.html">Pharmaceuticals</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/physical-chemistry.html">Physical Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/policy.html">Policy</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/research-integrity.html">Research Integrity</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/safety.html">Safety</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/synthesis.html">Synthesis</a></li> <li class="menu-item"> <a class="nav-child-link" href="/topics/acs-news.html">ACS News</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="MAGAZINE-dropdown" class="nav-element topic-pane">MAGAZINE <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane single-column-width" id="MAGAZINE-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-12"> <li class="nav-link-child"><a class="nav-child-link" href="/magazine/102/10237.html">Current Issue</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/magazine/all-issue.html">Recent Issues</a></li> <li class="nav-link-child"><a class="nav-child-link" href="https://pubs.acs.org/loi/cgeabj">Archives: 100 Years of C&EN</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">MAGAZINE</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/magazine/102/10237.html">Current Issue</a></li> <li class="menu-item"> <a class="nav-child-link" href="/magazine/all-issue.html">Recent Issues</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="https://pubs.acs.org/loi/cgeabj">Archives: 100 Years of C&EN</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="FEATURES-dropdown" class="nav-element topic-pane">FEATURES <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="FEATURES-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/CENs-10-Start-ups-to-Watch.html">10 Start-ups to Watch</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/cen-centennial.html">C&EN's Centennial</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/CENs-Talented-12.html">Talented Twelve</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/Trailblazers.html">Trailblazers</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/global-top-50.html">Global Top 50 chemical firms</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/us-top-50.html">US Top 50 chemical firms</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">FEATURES</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/collections/CENs-10-Start-ups-to-Watch.html">10 Start-ups to Watch</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/cen-centennial.html">C&EN's Centennial</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/CENs-Talented-12.html">Talented Twelve</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/sections/Trailblazers.html">Trailblazers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/global-top-50.html">Global Top 50 chemical firms</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/us-top-50.html">US Top 50 chemical firms</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="javascript:void(0)" data-toggle="COLLECTIONS-dropdown" class="nav-element topic-pane">COLLECTIONS <i class="fa fa-caret-down" aria-hidden="true"></i> <i class="fa fa-caret-up" aria-hidden="true"></i> </a> <div class="dropdown-pane nav-pane " id="COLLECTIONS-dropdown" data-dropdown data-position="bottom" data-alignment="left" data-close-on-click="true"> <div class="grid-x"> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/amazing-women-chemistry.html">Amazing Women of Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/bench-cubicle.html">Bench & Cubicle</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/career-ladder.html">Career Ladder</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/in-memoriam.html">In Memoriam</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/movers-and-shakers.html">Movers and Shakers</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/newscripts.html">Newscripts</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/nobel-prize-chemistry.html">Nobel Prize in Chemistry</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/collections/office-hours.html">Office Hours</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/opinion.html">Opinion</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/periodicgraphics.html">Periodic Graphics</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/quizzes.html">Quizzes</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/sketch-chemistry.html">Sketch Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/sections/speaking-of-chemistry.html">Speaking of Chemistry</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/whats-that-stuff.html">What's That Stuff?</a></li> </ul> <ul class="header-list-parent cell large-4"> <li class="nav-link-child"><a class="nav-child-link" href="/sections/arabic.html">باللغة العربية C&EN</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/espanol.html">C&EN en Español</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/chinese.html">C&EN中文版</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/portugues.html">C&EN em Português</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/webinars.html">C&EN Webinars</a></li> <li class="nav-link-child"><a class="nav-child-link" href="/collections/whitepapers.html">C&EN White Papers & eBooks</a></li> </ul> </div> </div></li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav">COLLECTIONS</h3> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/sections/amazing-women-chemistry.html">Amazing Women of Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/bench-cubicle.html">Bench & Cubicle</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/career-ladder.html">Career Ladder</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/in-memoriam.html">In Memoriam</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/movers-and-shakers.html">Movers and Shakers</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/newscripts.html">Newscripts</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/nobel-prize-chemistry.html">Nobel Prize in Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/office-hours.html">Office Hours</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/opinion.html">Opinion</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/periodicgraphics.html">Periodic Graphics</a></li> </ul> <ul class="large-6 small-6 medium-6 cell parent-ul-menu"> <li class="menu-item"> <a class="nav-child-link" href="/collections/quizzes.html">Quizzes</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/sketch-chemistry.html">Sketch Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/speaking-of-chemistry.html">Speaking of Chemistry</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/whats-that-stuff.html">What's That Stuff?</a></li> <li class="menu-item"> <a class="nav-child-link" href="/sections/arabic.html">باللغة العربية C&EN</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/espanol.html">C&EN en Español</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/chinese.html">C&EN中文版</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/portugues.html">C&EN em Português</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/webinars.html">C&EN Webinars</a></li> <li class="menu-item"> <a class="nav-child-link" href="/collections/whitepapers.html">C&EN White Papers & eBooks</a></li> </ul> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/sections/stereo-chemistry-podcast.html" class="nav-element topic-pane">PODCASTS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/sections/stereo-chemistry-podcast.html">PODCASTS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="/collections/chemistry-in-pictures.html" class="nav-element topic-pane">CHEMPICS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="/collections/chemistry-in-pictures.html">CHEMPICS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> <div> <li class="main-nav-child hide-for-mobile-nav"><a href="https://chemistryjobs.acs.org/" class="nav-element topic-pane">JOBS </a> </li> <div> <div class="hide-for-desktop-nav grid-x mobile-nav-bordering"> <h3 class="menu-item large-12 small-12 medium-12 cell mob-heading-nav no-menu-heading"><a href="https://chemistryjobs.acs.org/">JOBS <i class="fa fa-caret-right" aria-hidden="true"></i></a></h3> </div> </div> </div> </ul> </div> </div> </div> <div class="mobile-nav-footer"> <div class="follow-header">FOLLOW US</div> <div class="follow-social" style="font-size:15px;"> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.facebook.com/CENews" target="_blank" title="Facebook"> <i class="fa fa-facebook social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.instagram.com/cenmag/" target="_blank" title="Instagram"> <i class="fa fa-instagram social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://twitter.com/cenmag" target="_blank" title="X"> <i class="fa fa-twitter social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.linkedin.com/showcase/c&en/" target="_blank" title="LinkedIn"> <i class="fa fa-linkedin social-link-icon"></i> </a> </li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </header> <script> var date = new Date(); var y = date.getFullYear(); var m = date.getMonth()+1; var d = date.getDate(); var mode = 'true'; var searchpgName if(mode=='true') { searchpgName ="/search.html"; } else{ searchpgName ="/content/cen/search.html"; } function performSearchH() { var withQuery= searchpgName+"?q="+encodeURIComponent(document.getElementById("q").value)+"&sortBy=relevance&rpp=10&startYear=1998&startMonth=08&startDay=01&endYear="+y+"&endMonth="+m+"&endDay="+d+"&topics=all"; var withoutQuery= searchpgName; var valueCheck = document.getElementById("q").value; if(valueCheck!="" && valueCheck.length>0){ document.location.href=withQuery; } else{ document.location.href=withoutQuery; } } function performSearchMobile() { var withQuery=searchpgName+"?q="+encodeURIComponent(document.getElementById("mobile-search-box").value)+"&sortBy=relevance&rpp=10&startYear=1998&startMonth=08&startDay=01&endYear="+y+"&endMonth="+m+"&endDay="+d+"&topics=all"; var withoutQuery= searchpgName; var valueCheck = document.getElementById("mobile-search-box").value; if(valueCheck!="" && valueCheck.length>0){ document.location.href=withQuery; } else{ document.location.href=withoutQuery; } } </script></div> </div> </div> </div> </div> <div class="experiencefragment aem-GridColumn aem-GridColumn--default--12"> <div class="xf-content-height"> <div class="root responsivegrid"> <div class="aem-Grid aem-Grid--12 aem-Grid--default--12 "> <div class="cookieBar aem-GridColumn aem-GridColumn--default--12"> <div class="grid-x cookie-container cookie-container-fixed" id="cookie-main-bar"> <div class="cell small-9 mediun-10 large-9"> <div class="cookie-text"> <p>This site uses cookies to enhance your user experience. By continuing to use this site you are agreeing to our <a href="https://www.acs.org/content/acs/en/privacy.html#cookies" target="_blank" rel="noopener noreferrer">COOKIE POLICY</a>.<br /> </p></div> </div> <div class="cell small-3 mediun-2 large-3 cookie-cta-parent"> <a class="cookie-cta" id="cen-cookie-accept">ACCEPT AND CLOSE </a> </div> </div> </div> <div class="createAccountModal aem-GridColumn aem-GridColumn--default--12"> <div class="small reveal" id="signup-paywall-modal" data-close-on-click="false" data-close-on-esc="true" data-reveal> <div class="top-section-modal"> <button type="button" id="back-two-options" data-signup-back-action="" class="back-btn"><span><i class="cen-icon left-arrow"></i></span> <span class="btn-text"> Back</span> </button> <button class="close-button create-cta-click" data-close aria-label="Close modal" type="button"> <span aria-hidden="true">×</span> </button> </div> <div class="modal-top-hr show-for-small-only"></div> <div class="grid-container"> <div class="grid-x grid-margin-x"> <div class="cell small-12"> <h3 class="sign-up-heading typeF hide-signup-type"> Grab your lab coat. Let's get started </h3> <h3 class="sign-up-heading typeA hide-signup-type"> Welcome! </h3> <h3 class="sign-up-heading typeC typeE hide-signup-type"> Welcome! </h3> <h4 class="signup-subheading typeF hide-signup-type"> Create an account below to get 6 C&EN articles per month, receive newsletters and more - all free. </h4> <h4 class="signup-subheading typeA hide-signup-type"> It seems this is your first time logging in online. Please enter the following information to continue. </h4> <h4 class="signup-subheading typeC typeE hide-signup-type"> As an ACS member you automatically get access to this site. All we need is few more details to create your reading experience. </h4> <h4 class="signup-subheading typeA typeE typeC hide-signup-type margin-0"> <i class="fa fa-user" aria-hidden="true"></i> <span class="check-mark login-step2"><i class="fa fa-info" aria-hidden="true"></i></span> </h4> <h4 class="signup-subheading login-step2 typeA typeE typeC hide-signup-type margin-0" id="signup-disp-username"> </h4> <h4 class="signup-subheading login-step2 typeA hide-signup-type"> <a href="#" id="change-username-offline" class="sign-up-login-lnk create-cta-click">Not you? Sign in with a different account.</a> </h4> <h4 class="signup-subheading login-step2 typeC typeE hide-signup-type"> <a href="#" id="change-username-online" class="sign-up-login-lnk create-cta-click">Not you? Sign in with a different account.</a> </h4> </div> </div> <div class="grid-x grid-margin-x"> <div class="cell small-12 medium-12 large-12"> <p class="login-text login-error sign-up-errors T001 T002 T003 T004 E001 E002 E003 CL01 CL02 X001 X002 X003 SYS100 APP100"> ERROR 1 </p> </div> <input class="pay-signup-input signup-elqfname" type="hidden" value="0518SEHMeterAccountCreation"/> <input class="pay-signup-input signup-elqsiteid" type="hidden" name="elqSiteID" value="1913652004"/> <div class="cell small-12 medium-6 large-6"> <input class="pay-signup-input signup-first-name" type="text" placeholder="First Name"/> <p class="login-text login-error sign-up-errors FN01 APPFN104 APPFLIMIT109 INVALFNAME01"> ERROR 1 </p> </div> <div class="cell small-12 medium-6 large-6"> <input class="pay-signup-input signup-last-name" type="text" placeholder="Last Name"/> <p class="login-text login-error sign-up-errors LN01 APPLN103 APPLLIMIT108 INVALLNAME01"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12"> <input class="pay-signup-input signup-email" type="text" placeholder="Email Address"/> <p class="login-text login-error sign-up-errors EM01 EM02 EM03 EM04 APPEID105"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12"> <input class="pay-signup-input signup-company-id" type="hidden" name="acsOrgId" id="acs-org-id-hidden-f"/> <input class="typeahead" type="text" id="acs-org-company" placeholder="University / company name"/> <p class="login-text login-error sign-up-errors AON01"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12"> <input class="pay-signup-input signup-username" type="text" placeholder="Create a username for your ACS ID"/> <p class="login-text login-error sign-up-errors UN01 UN05 UN02 UN03 UN04 APPUN102 INVALUNAME01"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12"> <input class="pay-signup-input signup-password" type="password" placeholder="Password"/> <p class="login-text login-error sign-up-errors PW01 PW02 APPPSWD106"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12"> <input class="pay-signup-input signup-confirm-password" type="password" placeholder="Confirm password"/> <p class="login-text login-error sign-up-errors CONFIRMPSWD"> Password and Confirm password must match. </p> </div> <div class="cell small-12 large-12 medium-12 member-box"> <p class="membership-text"> If you have an ACS member number, please enter it here so we can link this account to your membership. (optional) </p> <input type="text" class="pay-signup-input signup-membership-number" placeholder="Member number (ex: 123456789)"/> <p class="login-text login-error sign-up-errors EM06 MN01 MN02"> ERROR 2 </p> </div> <div class="cell small-12 large-12 medium-12 typeF"> <fieldset class="large-12 cell"> <input id="signup-newsletter" class="signup-newsletter-chkbox" type="checkbox"/><label class="newsletter-label" for="signup-newsletter">Yes! I want to get the latest chemistry news from C&EN in my inbox every week.</label> </fieldset> </div> <div class="cell small-12 large-12 medium-12"> <p class="discalimer-text"> ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members. </p> </div> <div class="cell small-12 large-12 medium-12"> <a href="#" class="sign-up-btn button create-cta-click" id="create-account-main-btn"> CREATE ACCOUNT </a> </div> <div class="cell small-12 large-12 medium-12"> <a href="#" onclick="MyWindow=window.open('https://cen.acs.org/static/about/help.html','MyWindow','toolbar=no,location=no,directories=no,status=no, menubar=no,scrollbars=yes,resizable=yes,width=600,height=900'); return false;" class="sign-up-login-lnk float-right help-pass-link typeA hide-signup-type create-cta-click">Need Help?</a> <a href="#" onclick="MyWindow=window.open('https://cen.acs.org/static/about/help.html','MyWindow','toolbar=no,location=no,directories=no,status=no, menubar=no,scrollbars=yes,resizable=yes,width=600,height=900'); return false;" class="sign-up-login-lnk float-right help-pass-link typeC typeE hide-signup-type create-cta-click">Need Help?</a> </div> <div class="cell small-12 large-12 medium-12"> <p class="login-text typeA typeB typeD typeF hide-signup-type"> Already have an ACS ID? <a href="#" id="signup-make-login" class="sign-up-login-lnk create-cta-click">Log in here</a> </p> </div> </div> </div> </div> <script> var createAccountJson = {"SYS100":"System Error","AON01":"Please select a valid University/Company name. For self or retired, enter N/A.", "APP100":"Please enter relevant details", "APPUN102":"Username cannot be empty", "APPLN103":"Last Name cannot be empty", "APPFN104":"First Name cannot be empty", "APPEID105":"Email cannot be empty", "APPPSWD106":"Password cannot be empty", "APPLLIMIT108":"Last name should be less than 30 characters", "APPFLIMIT109":"First name should be less than 30 characters", "T001":"An error has occurred while creating the account. Please contact System Administrator.","T002":"An error has occurred while creating the account. Please contact system administrator.","T003":"An error has occurred while creating the account. Please contact system administrator.","T004":"An error has occurred while creating the account. Please contact system administrator.","FN01":"First name not provided","LN01":"Last name not provided","EM01":"Email address not provided","EM02":"Please enter a valid email address","EM03":"Please enter a valid email address","EM04":"An account already exists for this email address.","EM06":"We need more information to complete your request; please contact Member Services at service@acs.org.","UN01":"User name should be alphanumeric,4 to 16 characters long and can contain special characters'_','-','.'or'@'","UN02":"User name should be alphanumeric,4 to 16 characters long and can contain special characters'_','-','.'or'@'","UN03":"An account already exists for this username.","UN04":"An account already exists for this username. ", "UN05":"User not found","INVALUNAME02": "Invalid Username", "PW01":"Password not provided", "PW02":"Password must use both numbers and letters and be 4 to 16 characters long. It can contain special characters '_','-','.' or '@'", "MN01":"Member number not found. Please enter a valid member number.", "MN02":"Please enter a valid member number. Member numbers are numerical and 9 characters long.", "E001":"Email and last name do not match", "E002":"Email, last name, and member number do not match", "E003":"Email and member number do not match", "CL01":"An error has occurred while creating the account. Please contact system administrator.","CONFIRMPSWD":"Password and Confirm password must match.", "CL02":"An error has occurred while creating the account. Please contact system administrator.", "X001":"An error has occurred while creating the account. Please contact system administrator.", "X002":"An error has occurred while creating the account. Please contact system administrator.", "X003":"An error has occurred while creating the account. Please contact system administrator." ,"INVALUNAME01":"Username should be alphanumeric and can contain special characters '_','-','.' or '@'", "INVALLNAME01":"Last Name should be alphanumeric, not more than 30 characters long and can contain special characters '_','-'", "INVALFNAME01":"First Name should be alphanumeric, not more than 30 characters long and can contain special characters '_','-'"}; localStorage.setItem("errorCodesStore",JSON.stringify(createAccountJson)); var contextPath = 'https://orgsearch.acs.org/acsoipui'; $(function(){ createAccount.init(contextPath); }); </script> <script> var userTypeForAjax=""; function showSignUpModal(type){ ClosePop(); var acsType = "240101_cen_paywall_a" ; var url = window.top.location.href; var redirect_url = "?redirect_url="+encodeURIComponent(url); var source_code = "&sourcecode="+acsType; var redirectPath ="https://account.acs.org/ssoamweb/account/doSignUp?url_success=https%3A%2F%2Fmembershipdev.acs.org%2Finline%2Fmembership%2F"; redirectPath+=encodeURIComponent(redirect_url)+encodeURIComponent(source_code); redirectPath+="&url_cancel="+encodeURIComponent(url); window.top.location.href = redirectPath; } if(window.frameElement) { window.ClosePop = function(){ window.parent.ClosePop(); } } </script> </div> <div class="membershipCategories aem-GridColumn aem-GridColumn--default--12"> <script> var returnToCenLabel = "Return to C%26EN" ; var ctaPath = " https://membership.join.acs.org "; var ctaPath2 = "https://membership.acs.org/inline/membership/ "; var acsType = "240101_cen_paywall_a" ; </script> <div class="modal-dialog modal-dialog-membership reveal large" id="membership-modal" data-close-on-click="false" data-close-on-esc="true" data-reveal> <div class="modal-option"> <div class="modal-content"> <button class="close-button membership-cta-click membership-cta-galabels " data-close data-memtype="x" aria-label="Close modal" type="button"> <span aria-hidden="true">×</span> </button> <div class="modal-header"> </div> <div class="membership-modal-hr show-for-small-only"></div> <div class="modal-body"> <div class="grid-container membership-parent-common membership-rev membership-large" id="A"> <div class="modal-body-header grid-x"> <div class="large-12 medium-12 small-12 cell"> <p class="membership-membersubtext"> <span class="membership-discount-text text-left"></span></p> </div> <div class="large-12 medium-12 small-12 cell"> <h2 class="member-text">Cyber Savings Season: Get 30% off ACS membership with promo code CYBER24. Offer valid though Dec. 11.</h2> </div> <div class="large-12 medium-12 small-12 cell"> <h4 class="modal-heading-signup">Access more articles now. Choose the ACS option that’s right for you. <span class="membership-discount-text text-left"></span></h4> </div> <div class="large-12 medium-12 small-12 cell"> <p class="membership-subheader"> Already an ACS Member? <a class="membership-login-cta membership-cta-click membership-cta-galabels" onclick="$('.reveal').foundation('close');showloginpopup(true); return false;" href="#">Log in here</a>   </p> </div> <div class="large-12 medium-12 small-12 cell membership-prices-box"> <div class=""> <div class="grid-x"> <div class="large-4 medium-4 small-12 cell top-margin-20"> <div class="large-12 medium-12 small-12 cell membership-box"> <div class="membership-type">Basic</div> <div class="membership-headline-bottom"></div> <div class="membership-price-2 basic-pkg"> <p><b>$0 </b>Community Associate<br /> </p> </div> </div> <div class="large-12 medium-12 small-12 cell text-left top-margin-10"> <div class="membership-benifits text-left top-basic-margin-10"> <p><b>ACS’s Basic Package keeps you connected with C&EN and ACS.</b></p> <ul><li>Access to 6 digital C&EN articles per month on cen.acs.org</li><li>Weekly delivery of the C&EN Essential newsletter</li></ul> </div> </div> <a href="#" class="communityMembership-cta membership-cta-click" data-memtype="Basic Package">JOIN NOW</a><br/> </div> <div class="large-4 medium-4 small-12 cell top-margin-20"> <div class="large-12 medium-12 small-12 cell membership-box"> <div class="membership-type">Standard</div> <div class="membership-headline-bottom"></div> <div class="membership-price-2 standard-pkg"> <p><b>$80</b> Regular Members & Society Affiliates</p> </div> </div> <div class="large-12 medium-12 small-12 cell text-left top-margin-10"> <div class="membership-benifits text-left top-margin-10"> <p><b>ACS’s Standard Package lets you stay up to date with C&EN, stay active in ACS, and save.</b></p> <ul><li>Access to 10 digital C&EN articles per month on cen.acs.org</li><li>Weekly delivery of the digital C&EN Magazine</li><li>Access to our <a href="https://cen.acs.org/static/about/mobile.html">Chemistry News by C&EN mobile app</a></li></ul> <div><b>Eligibility restrictions apply. Review <a href="https://www.acs.org/membership/member-benefits.html">ACS Membership Packages</a> to see if you qualify.</b><br /> <br /> </div> </div> </div> <a href="#" class="membership-cta membership-cta-click" data-memtype="Standard Package">JOIN NOW</a><br/> </div> <div class="large-4 medium-4 small-12 cell top-margin-20"> <div class="large-12 medium-12 small-12 cell membership-box"> <div class="membership-type"> Premium</div> <div class="membership-headline-bottom"></div> <div class="membership-price-2"> <p><b>$160 </b>Regular Members & Society Affiliates<br /> <b>$55</b> Graduate Students<br /> <b>$25</b> Undergraduate Students</p> </div> </div> <div class="large-12 medium-12 small-12 cell text-left top-margin-10"> <div class="membership-benifits text-left top-margin-10"> <p><b>ACS’s Premium Package gives you full access to C&EN and everything the ACS Community has to offer.</b></p> <ul><li>Unlimited access to C&EN’s daily news coverage on cen.acs.org</li><li>Weekly delivery of the C&EN Magazine in print or digital format</li><li>Access to our <a href="https://cen.acs.org/static/about/mobile.html">Chemistry News by C&EN mobile app</a></li><li>Significant discounts on registration for most ACS-sponsored meetings</li></ul> <div><b>ACS offers discounts for some countries outside the United States. This discount is shown at checkout, if applicable.</b><br /> <br /> </div> </div> </div> <a href="#" class="membership-cta membership-cta-click" data-memtype="Premium Package">JOIN NOW</a><br/> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div> <script> if(window.frameElement) { window.openMembershipmodal = function(){ $('.reveal').foundation('close'); $('#membership-modal').foundation('open'); } } </script></div> <div class="thankYouModal aem-GridColumn aem-GridColumn--default--12"> <div class="modal-dialog thankyou-modal reveal tiny" id="thankyou-modal" data-close-on-click="false" data-close-on-esc="false" data-reveal> <div class="modal-option"> <div class="modal-content"> <div class="modal-header"> </div> <div class="modal-body"> <div class="grid-container"> <div class="modal-body-header grid-x"> <div class="large-12 medium-12 small-12 cell text-center"> <h2 class="thankyou-header"> Thank you! </h2> <img src="/content/dam/acs-cen-redesign/logo/flask.png" class="thankyou-image"/> <p class="thankyou-membersubtext"> Your account has been created successfully, and a confirmation email is on the way. </p> <p class="thankyou-membersubtext"> Your username is now your ACS ID. </p> <div class="large-8 medium-8 small-12 cell top-margin1 text-center"> <a class="thankyou-cta" id="thank-you-continue-reading-cta" href="#"> <span aria-hidden="true" id="thank-you-submit-text"> CONTINUE READING   </span> </a> </div> </div> </div> </div> </div> </div> </div> </div> <span id="unlimited-thank-you-text" class="hide">ENJOY UNLIMITED ACCES TO C&EN</span> </div> </div> </div> </div> </div> <div class="responsivegrid aem-GridColumn--default--none aem-GridColumn aem-GridColumn--default--8 aem-GridColumn--offset--default--2"> <div class="aem-Grid aem-Grid--8 aem-Grid--default--8 "> <div class="collectionPageIntro aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container"> <div class="grid-x grid-padding-x"> <div class="large-12 medium-12 cell"> <div class="page-title-block"> <h1 class="page-title topic-title page-title-allissues"> <span id="main-collections-title">C&EN em Português</span> <span class="visible-mobilepad"> </h1> <h2 class="page-desc"> <span id="main-collections-description">Portuguese translations of C&EN's best weekly chemistry news--provided in collaboration with the <a href="http://www.sbq.org.br/" target="_blank" rel="noopener noreferrer">Sociedade Brasileira de Química</a></span> </h2> </div> </div> </div> </div></div> <div class="collections-list aem-GridColumn aem-GridColumn--default--8"> <style> .year-list-Container{ display: none; } </style> <style> .collectionBoxEmpty{ margin-bottom: 20rem !important; } .collectionBoxFull{ margin-bottom: 0.5rem !important; } </style> <div id="collectionBtnContainer" class="year-list-Container" style="max-width: 75rem;margin: 0 auto;margin-bottom: 0.5rem;padding-right: .9375rem;padding-left: .9375rem"> <button class="year-tab active" onclick="filterSelection('all')"> Show all</button><button class="year-tab" onclick="filterSelection('2024')">2024</button><button class="year-tab" onclick="filterSelection('2023')">2023</button><button class="year-tab" onclick="filterSelection('2022')">2022</button><button class="year-tab" onclick="filterSelection('2021')">2021</button><button class="year-tab" onclick="filterSelection('2020')">2020</button><button class="year-tab" onclick="filterSelection('2019')">2019</button><button class="year-tab" onclick="filterSelection('2018')">2018</button><button class="year-tab" onclick="filterSelection('2017')">2017</button><button class="year-tab" onclick="filterSelection('2016')">2016</button><button class="year-tab" onclick="filterSelection('2015')">2015</button> </div> <div class="flex-grid"> <div class="grid-item 2024"> <a href="/careers/diversity/pt-A-Revolucao-Revolucion-nao-sera-televisionada/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A Revolução/Revolución não será televisionada " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover61-opener-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover61-opener-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/careers/diversity/pt-A-Revolucao-Revolucion-nao-sera-televisionada/102/i29">A Revolução/Revolución não será televisionada </a></h2> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/physical-chemistry/computational-chemistry/pt-Alan-Aspuru-Guzik-elimina-as-fronteiras-entre-quimica-IA-e-robotica/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Alán Aspuru-Guzik elimina as fronteiras entre química, IA e robótica " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover62-aspuruguzika1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover62-aspuruguzika1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/computational-chemistry/pt-Alan-Aspuru-Guzik-elimina-as-fronteiras-entre-quimica-IA-e-robotica/102/i29">Alán Aspuru-Guzik elimina as fronteiras entre química, IA e robótica </a></h2> <div class="deck">O editor convidado da Trailblazers 2024 também proporciona aos químicos as ferramentas para acelerar suas pesquisas </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/materials/biomaterials/pt-Karina-Carneiro-reconstroi-tecidos-utilizando-DNA-sintetico/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Karina Carneiro reconstrói tecidos utilizando DNA sintético" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover6-carneiro-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover6-carneiro-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/biomaterials/pt-Karina-Carneiro-reconstroi-tecidos-utilizando-DNA-sintetico/102/i29">Karina Carneiro reconstrói tecidos utilizando DNA sintético</a></h2> <div class="deck">O doutorando <b>Dagwin Wachholz Júnior</b> conversa com esta química sobre medicina regenerativa e a representatividade de pesquisadores latino-americanos </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2024"> <a href="/education/outreach/pt-a-jornada-de-Melissa-Ramirez-de-aluna-universitaria-de-primeira-geracao-a-professora-universitaria/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A jornada de Melissa Ramirez, de aluna universitária de primeira geração a professora universitária" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover17-ramirez-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover17-ramirez-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/education/outreach/pt-a-jornada-de-Melissa-Ramirez-de-aluna-universitaria-de-primeira-geracao-a-professora-universitaria/102/i29">A jornada de Melissa Ramirez, de aluna universitária de primeira geração a professora universitária</a></h2> <div class="deck">O doutorando <b>Ramón Gudiño García</b> conversa com esta especialista em química orgânica, computacional e sintética sobre ser uma universitária de primeira geração e mulher latina na área científica </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/materials/polymers/pt-Monica-Olivera-de-la-Cruz-traz-simulacoes-quimicas-para-o-mundo-real/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Monica Olvera de la Cruz traz simulações químicas para o mundo real " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover75-delacruz1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover75-delacruz1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/polymers/pt-Monica-Olivera-de-la-Cruz-traz-simulacoes-quimicas-para-o-mundo-real/102/i29">Monica Olvera de la Cruz traz simulações químicas para o mundo real </a></h2> <div class="deck">Esta pesquisadora une as ciências teórica e experimental utilizando física, química e biologia </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/food/food-science/pt-Martin-Salinas-induz-plantacoes-a-produzir-proteinas-animais/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Martín Salinas induz plantações a produzir proteínas animais " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover18-salinas-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover18-salinas-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/food/food-science/pt-Martin-Salinas-induz-plantacoes-a-produzir-proteinas-animais/102/i29">Martín Salinas induz plantações a produzir proteínas animais </a></h2> <div class="deck">A doutoranda <b>Natalia Gorojovsky</b> conversa com este engenheiro químico sobre sua liderança em uma empresa spinout de agricultura molecular na América Latina </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/analytical-chemistry/pt-Maria-Fernanda-Mora-procura-vida-em-outros-planetas/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Maria Fernanda Mora procura vida em outros planetas" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover14-mora-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover14-mora-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/pt-Maria-Fernanda-Mora-procura-vida-em-outros-planetas/102/i29">Maria Fernanda Mora procura vida em outros planetas</a></h2> <div class="deck">A doutoranda <b>Alejandra Rodríguez Abaunza</b> conversa com esta química analítica sobre seu trabalho na NASA e como suas experiências pessoais marcaram sua carreira </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/safety/pt-Varinia-Bernales-desenvolve-substancias-qumicas-mais-seguras-e-torna-a-ciencia-mais-igualitaria/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Varinia Bernales desenvolve substâncias químicas mais seguras e torna a ciência mais igualitária " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover3-bernales1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover3-bernales1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/safety/pt-Varinia-Bernales-desenvolve-substancias-qumicas-mais-seguras-e-torna-a-ciencia-mais-igualitaria/102/i29">Varinia Bernales desenvolve substâncias químicas mais seguras e torna a ciência mais igualitária </a></h2> <div class="deck">A química computacional luta pelas mulheres na ciência </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/environment/sustainability/pt-Sarah-Briceno-transforma-os-recursos-naturais-do-Equador-em-nanomateriais/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Sarah Briceño transforma os recursos naturais do Equador em nanomateriais " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover64-briceno1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover64-briceno1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/sustainability/pt-Sarah-Briceno-transforma-os-recursos-naturais-do-Equador-em-nanomateriais/102/i29">Sarah Briceño transforma os recursos naturais do Equador em nanomateriais </a></h2> <div class="deck">Esta venezuelana expatriada transforma dejetos agrícolas e algas em novos materiais para a saúde e a nanotecnologia </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/education/pt-Edna-Matta-Camacho-luta-contra-as-desigualdades-educacionais-na-zona-rural-da-Colombia/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Edna Matta-Camacho luta contra as desigualdades educacionais na zona rural da Colômbia " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover73-mattacamacho1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover73-mattacamacho1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/education/pt-Edna-Matta-Camacho-luta-contra-as-desigualdades-educacionais-na-zona-rural-da-Colombia/102/i29">Edna Matta-Camacho luta contra as desigualdades educacionais na zona rural da Colômbia </a></h2> <div class="deck">Esta química também se certifica de que os medicamentos são seguros para o público </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2024"> <a href="/food/food-science/pt-Monica-Cala-e-cofundadora-e-lider-do-primeiro-centro-de-metabolomica-na-Colombia/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Mónica Cala é cofundadora e líder do primeiro centro de metabolômica na Colômbia" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover5-cala-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover5-cala-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/food/food-science/pt-Monica-Cala-e-cofundadora-e-lider-do-primeiro-centro-de-metabolomica-na-Colombia/102/i29">Mónica Cala é cofundadora e líder do primeiro centro de metabolômica na Colômbia</a></h2> <div class="deck"><b>Kieran Tarazona Carrillo</b>, estudante de doutorado, conversa com esta pesquisadora em metabolômica sobre o estabelecimento de um centro de pesquisa de última geração na Colômbia e a promoção da pesquisa na América Latina </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/careers/diversity/pt-Luis-A-Colon-dedicou-decadas-a-promover-mais-diversidade-nas-ciencias-quimicas/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Luis A. Colón dedicou décadas a promover mais diversidade nas ciências químicas " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover8-colon-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover8-colon-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/careers/diversity/pt-Luis-A-Colon-dedicou-decadas-a-promover-mais-diversidade-nas-ciencias-quimicas/102/i29">Luis A. Colón dedicou décadas a promover mais diversidade nas ciências químicas </a></h2> <div class="deck">A doutoranda <b>Deysi Gómez Cholula</b> conversa com este químico analítico sobre sua premiada experiência como orientador </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/biological-chemistry/chemical-communication/pt-Rogelio-A-Hernandez-Lopez-reprograma-celulas-para-combater-o-cancer/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Rogelio A. Hernández-López reprograma células para combater o câncer " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover69-hernandez1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover69-hernandez1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/chemical-communication/pt-Rogelio-A-Hernandez-Lopez-reprograma-celulas-para-combater-o-cancer/102/i29">Rogelio A. Hernández-López reprograma células para combater o câncer </a></h2> <div class="deck"> A comunicação — tanto entre células quanto com as novas gerações de cientistas — é uma marca registrada dos esforços deste químico mexicano </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/environment/greenhouse-gases/pt-Quando-nao-esta-capturando-carbono-Aline-M-Castro-escreve-livros-infantis/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Quando não está capturando carbono, Aline M. Castro escreve livros infantis " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover67-decastro1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover67-decastro1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/greenhouse-gases/pt-Quando-nao-esta-capturando-carbono-Aline-M-Castro-escreve-livros-infantis/102/i29">Quando não está capturando carbono, Aline M. Castro escreve livros infantis </a></h2> <div class="deck">Esta química está trabalhando para tornar os combustíveis fósseis mais limpos, mas sua verdadeira paixão é divulgar ciência para as crianças </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/materials/pt-Juan-Paulo-Hinestroza-combina-nanotecnologia-com-design-de-moda/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Juan Paulo Hinestroza combina nanotecnologia com design de moda " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover70-hinestroza1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover70-hinestroza1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/pt-Juan-Paulo-Hinestroza-combina-nanotecnologia-com-design-de-moda/102/i29">Juan Paulo Hinestroza combina nanotecnologia com design de moda </a></h2> <div class="deck">Este químico cria peças de vestuário capazes de mudar de cor, filtrar poluentes e até detectar explosivos </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/environment/pollution/pt-Pablo-Pasten-investiga-o-legado-quimico-das-minas-do-Chile/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Pablo Pastén investiga o legado químico das minas do Chile " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover16-pasten1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover16-pasten1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/pollution/pt-Pablo-Pasten-investiga-o-legado-quimico-das-minas-do-Chile/102/i29">Pablo Pastén investiga o legado químico das minas do Chile </a></h2> <div class="deck">Este químico ambiental também está trabalhando com o governo para atrelar a ciência às políticas públicas </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/physical-chemistry/computational-chemistry/pt-Joel-Yuen-Zhou-captura-fotons-e-os-utiliza-para-controlar-reacoes-quimicas/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Joel Yuen-Zhou captura fótons e os utiliza para controlar reações químicas" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover80-yuenzhou1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover80-yuenzhou1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/computational-chemistry/pt-Joel-Yuen-Zhou-captura-fotons-e-os-utiliza-para-controlar-reacoes-quimicas/102/i29">Joel Yuen-Zhou captura fótons e os utiliza para controlar reações químicas</a></h2> <div class="deck">Este químico teórico captura fótons e os utiliza para controlar reações químicas </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/physical-chemistry/pt-Eusebio-Juaristi-dedicou-sua-carreira-a-pensar-em-moleculas-em-3D/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Eusebio Juaristi dedicou sua carreira a pensar em moléculas em 3D " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover71-juaristi1-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover71-juaristi1-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/pt-Eusebio-Juaristi-dedicou-sua-carreira-a-pensar-em-moleculas-em-3D/102/i29">Eusebio Juaristi dedicou sua carreira a pensar em moléculas em 3D </a></h2> <div class="deck">Este físico-químico orgânico também contribuiu para o desenvolvimento da química orgânica na América Latina </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/pharmaceuticals/process-chemistry/pt-Carlos-Martinez-utilizou-os-catalisadores-da-natureza-para-tornar-o-Paxlovid-uma-realidade/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Carlos A. Martinez utilizou os catalisadores da natureza para tornar o Paxlovid uma realidade " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover72-martinez1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover72-martinez1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/process-chemistry/pt-Carlos-Martinez-utilizou-os-catalisadores-da-natureza-para-tornar-o-Paxlovid-uma-realidade/102/i29">Carlos A. Martinez utilizou os catalisadores da natureza para tornar o Paxlovid uma realidade </a></h2> <div class="deck">Este químico de processos ajudou a aumentar a escala de produção de um componente essencial do antiviral para COVID-19 </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/pharmaceuticals/drug-development/pt-Anabella-Villalobos-redefiniu-maneira-de-tratar-doencas-neurologicas/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Anabella Villalobos redefiniu a maneira de tratar doenças neurológicas " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover79-villalobos1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover79-villalobos1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/drug-development/pt-Anabella-Villalobos-redefiniu-maneira-de-tratar-doencas-neurologicas/102/i29">Anabella Villalobos redefiniu a maneira de tratar doenças neurológicas </a></h2> <div class="deck">Durante décadas, esta química medicinal liderou pesquisas com o sistema nervoso central, desenvolvendo dezenas de medicamentos para a prática clínica </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024"> <a href="/careers/diversity/pt-Colaboradores-As-mentes-criativas-por-tras-da-edicao-deste-ano/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Colaboradores" data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover22-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover22-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/careers/diversity/pt-Colaboradores-As-mentes-criativas-por-tras-da-edicao-deste-ano/102/i29">Colaboradores</a></h2> <div class="deck">As mentes criativas por trás da edição deste ano </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2024 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2024"> <a href="/people/profiles/pt-Quimicos-hispanicos-e-latinos-que-voce-precisa-conhecer/102/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Químicos hispânicos e latinos que você precisa conhecer " data-src="https://s7d1.scene7.com/is/image/CENODS/10229-cover81-collage?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10229-cover81-collage?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/profiles/pt-Quimicos-hispanicos-e-latinos-que-voce-precisa-conhecer/102/i29">Químicos hispânicos e latinos que você precisa conhecer </a></h2> <div class="deck">Estes cientistas visionários descobriram novos elementos e ajudaram a desenvolver a pílula anticoncepcional </div> <div class="date">September 20, 2024</div> </div> <div class="grid-item 2022"> <a href="/people/awards/pt-ACS-FLAQ-presente-2022-Latino/100/web/2022/11"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Pesquisadoras do Brasil, Colômbia e México ganham o Prêmio Mulheres Latino-americanas na Química " data-src="https://s7d1.scene7.com/is/image/CENODS/20221109lnp1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20221109lnp1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/awards/pt-ACS-FLAQ-presente-2022-Latino/100/web/2022/11">Pesquisadoras do Brasil, Colômbia e México ganham o Prêmio Mulheres Latino-americanas na Química </a></h2> <div class="deck">Premiação oferecida pela ACS e pela FLAQ valoriza a igualdade de gêneros, a inclusão e a diversidade na ciência </div> <div class="date">November 9, 2022</div> </div> <div class="grid-item 2022"> <a href="/people/pt-Quimicos-respondem-invasao-da-Ucrania/100/i9"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Químicos respondem à invasão da Ucrânia" data-src="https://s7d1.scene7.com/is/image/CENODS/10009-scicon50-kharkiv-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10009-scicon50-kharkiv-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/pt-Quimicos-respondem-invasao-da-Ucrania/100/i9">Químicos respondem à invasão da Ucrânia</a></h2> <div class="deck">Comunidade científica expressa solidariedade contra invasão à medida que os custos para a ciência russa crescem</div> <div class="date">March 21, 2022</div> </div> <div class="grid-item 2022"> <a href="/synthesis/catalysis/pt-Intermedirios-de-zelitas-oferecem-novas/100/i12"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Intermediários de zeólitas oferecem novas possibilidades em catálise" data-src="https://s7d1.scene7.com/is/image/CENODS/10012-scicon50-inter.pt-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10012-scicon50-inter.pt-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/catalysis/pt-Intermedirios-de-zelitas-oferecem-novas/100/i12">Intermediários de zeólitas oferecem novas possibilidades em catálise</a></h2> <div class="deck">Em meio a uma bem conhecida transformação de fase zeólita, pesquisadores descobriram espécies ativas que aceleram reações catalisadas por ácidos</div> <div class="date">March 21, 2022</div> </div> <div class="grid-item 2022"> <a href="/people/awards/pt-Bonnie-Bassler-Carolyn-Bertozzi-e-Benjamin-Cravatt-recebem-o-Premio-Wolf-20220-de-Quimica/100/i6"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Bonnie Bassler, Carolyn Bertozzi e Benjamin Cravatt recebem o Prêmio Wolf 2022 de Química" data-src="https://s7d1.scene7.com/is/image/CENODS/10006-scicon50-headshots-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10006-scicon50-headshots-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/awards/pt-Bonnie-Bassler-Carolyn-Bertozzi-e-Benjamin-Cravatt-recebem-o-Premio-Wolf-20220-de-Quimica/100/i6">Bonnie Bassler, Carolyn Bertozzi e Benjamin Cravatt recebem o Prêmio Wolf 2022 de Química</a></h2> <div class="deck">O prêmio reconhece inovação na junção da química com a biologia, dizem pesquisadores</div> <div class="date">February 22, 2022</div> </div> <div class="grid-item 2022"> <a href="/research-integrity/misconduct/pt-Veredicto-de-culpado-para-Charles/100/i1"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Veredicto de culpado para Charles Lieber deixa preocupações sobre a China Initiative" data-src="https://s7d1.scene7.com/is/image/CENODS/10001-scicon50-lieber-pt-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10001-scicon50-lieber-pt-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/research-integrity/misconduct/pt-Veredicto-de-culpado-para-Charles/100/i1">Veredicto de culpado para Charles Lieber deixa preocupações sobre a China Initiative</a></h2> <div class="deck">Permanecem dúvidas sobre processos de segurança de pesquisa acadêmica</div> <div class="date">January 3, 2022</div> </div> <div class="grid-item 2021"> <a href="/physical-chemistry/periodic-table/pt-Adaptando-tabela-peridica-em-quchua/99/i43"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Adaptando a tabela periódica em quíchua" data-src="https://s7d1.scene7.com/is/image/CENODS/09943-scicon50-table-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09943-scicon50-table-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/periodic-table/pt-Adaptando-tabela-peridica-em-quchua/99/i43">Adaptando a tabela periódica em quíchua</a></h2> <div class="deck">Uma equipe, incluindo falantes nativos, criou uma tabela periódica em uma língua indígena da América do Sul</div> <div class="date">November 29, 2021</div> </div> <div class="grid-item 2021"> <a href="/people/awards/pt-ACS-e-SBQ-apresentam-prmios/99/web/2021/11"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="ACS e SBQ apresentam prêmios Mulheres Brasileiras na Química" data-src="https://s7d1.scene7.com/is/image/CENODS/20211104lnp50-three-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20211104lnp50-three-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/awards/pt-ACS-e-SBQ-apresentam-prmios/99/web/2021/11">ACS e SBQ apresentam prêmios Mulheres Brasileiras na Química</a></h2> <div class="deck">As homenageadas serão reconhecidas durante a reunião anual virtual da Sociedade Brasileira de Química no fim do mês</div> <div class="date">November 4, 2021</div> </div> <div class="grid-item 2021"> <a href="/people/nobel-prize/pt-Os-pioneiros-da-organocatalise-assimetrica-ganham-o-Premio-Nobel-de-Quimica-de-2021/99/i37"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Os pioneiros da organocatálise assimétrica ganham o Prêmio Nobel de Química de 2021" data-src="https://s7d1.scene7.com/is/image/CENODS/09937-scicon50-chemistry-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09937-scicon50-chemistry-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/nobel-prize/pt-Os-pioneiros-da-organocatalise-assimetrica-ganham-o-Premio-Nobel-de-Quimica-de-2021/99/i37">Os pioneiros da organocatálise assimétrica ganham o Prêmio Nobel de Química de 2021</a></h2> <div class="deck">Benjamin List e David W. C. MacMillan levaram para casa o prêmio por revolucionar a síntese orgânica quiral com catalisadores de pequenas moléculas</div> <div class="date">October 25, 2021</div> </div> <div class="grid-item 2021"> <a href="/people/awards/pt-Novo-prmio-homenageia-mulheres-latino/99/i39"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Novo prêmio homenageia mulheres latino-americanas na ciência" data-src="https://s7d1.scene7.com/is/image/CENODS/09939-awards1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09939-awards1-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/awards/pt-Novo-prmio-homenageia-mulheres-latino/99/i39">Novo prêmio homenageia mulheres latino-americanas na ciência</a></h2> <div class="date">October 25, 2021</div> </div> <div class="grid-item 2021"> <a href="/biological-chemistry/epigenetics/pt-Cientistas-identificam-um-possvel-mecanismo/99/i24"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Cientistas identificam um possível mecanismo molecular da síndrome de Rett" data-src="https://s7d1.scene7.com/is/image/CENODS/09924-scicon50-fig7a-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09924-scicon50-fig7a-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/epigenetics/pt-Cientistas-identificam-um-possvel-mecanismo/99/i24">Cientistas identificam um possível mecanismo molecular da síndrome de Rett</a></h2> <div class="deck">Epigeneticistas descobrem uma ligação entre repetições de DNA metilado e proteínas envolvidas em rara doença genética</div> <div class="date">June 28, 2021</div> </div> <div class="grid-item 2021 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2021"> <a href="/pharmaceuticals/gene-therapy/pt-Uma-aplicao-nica-de-CRISPR/99/i19"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Uma aplicação única de CRISPR reduz o colesterol em macacos" data-src="https://s7d1.scene7.com/is/image/CENODS/09919-scicon50-pcsk9-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09919-scicon50-pcsk9-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/gene-therapy/pt-Uma-aplicao-nica-de-CRISPR/99/i19">Uma aplicação única de CRISPR reduz o colesterol em macacos</a></h2> <div class="deck">A Verve Therapeutics demonstra redução do LDL a longo prazo para terapia de editor de suporte do produto ativo</div> <div class="date">May 19, 2021</div> </div> <div class="grid-item 2021"> <a href="/biological-chemistry/natural-products/pt-estruturas-das-lomaiviticinas-passam-por/99/i17"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="As estruturas das lomaiviticinas passam por uma revisão" data-src="https://s7d1.scene7.com/is/image/CENODS/09917-scicon50-lomaiv-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09917-scicon50-lomaiv-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/natural-products/pt-estruturas-das-lomaiviticinas-passam-por/99/i17">As estruturas das lomaiviticinas passam por uma revisão</a></h2> <div class="deck">A MicroED ajuda os químicos a determinar a conectividade correta desses produtos naturais complexos</div> <div class="date">May 5, 2021</div> </div> <div class="grid-item 2021"> <a href="/pharmaceuticals/vaccines/pt-vacina-da-JJ-continua-em-pausa/99/i14"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A vacina da J&J continua em pausa" data-src="https://s7d1.scene7.com/is/image/CENODS/09914-scicon50-jjvacc-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09914-scicon50-jjvacc-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-vacina-da-JJ-continua-em-pausa/99/i14">A vacina da J&J continua em pausa</a></h2> <div class="deck">O comitê consultivo de vacinas do CDC observará e aguardará antes de decidir sobre a vacina da J&J</div> <div class="date">April 16, 2021</div> </div> <div class="grid-item 2021"> <a href="/acs-news/acs-meeting-news/pt-Pfizer-apresenta-seu-inibidor-oral-da-SARS-CoV-2/99/i13"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A Pfizer apresenta seu inibidor oral da SARS-CoV-2" data-src="https://s7d1.scene7.com/is/image/CENODS/09913-scicon50-struct-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09913-scicon50-struct-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/acs-news/acs-meeting-news/pt-Pfizer-apresenta-seu-inibidor-oral-da-SARS-CoV-2/99/i13">A Pfizer apresenta seu inibidor oral da SARS-CoV-2</a></h2> <div class="deck">O antiviral candidato é o primeiro composto administrado por via oral a entrar em ensaios clínicos que têm como alvo a principal protease do vírus</div> <div class="date">April 12, 2021</div> </div> <div class="grid-item 2021"> <a href="/physical-chemistry/astrochemistry/pt-HAPs-espreitando-entre-estrelas-agora-foram-identificados/99/i10"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="HAPs espreitando entre as estrelas agora foram identificados" data-src="https://s7d1.scene7.com/is/image/CENODS/09910-scicon50-stars-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09910-scicon50-stars-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/astrochemistry/pt-HAPs-espreitando-entre-estrelas-agora-foram-identificados/99/i10">HAPs espreitando entre as estrelas agora foram identificados</a></h2> <div class="deck">A descoberta pode ajudar a resolver quebra-cabeças de química espacial, mas ainda existem muitas dúvidas</div> <div class="date">March 18, 2021</div> </div> <div class="grid-item 2021"> <a href="/pharmaceuticals/vaccines/pt-Vacina-da-JJ-terceira-vacina/99/i8"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Vacina da J&J é a terceira vacina a COVID-19 autorizada nos EUA" data-src="https://s7d1.scene7.com/is/image/CENODS/09908-scicon50-vaccine-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09908-scicon50-vaccine-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-Vacina-da-JJ-terceira-vacina/99/i8">Vacina da J&J é a terceira vacina a COVID-19 autorizada nos EUA</a></h2> <div class="deck">A Merck & Co. ajudará a produzir a vacina de vetor adenoviral em dose única, que protege contra as variantes emergentes do vírus, como a B.1.351</div> <div class="date">March 8, 2021</div> </div> <div class="grid-item 2021"> <a href="/biological-chemistry/infectious-disease/pt-O-que-devemos-saber-medida/99/web/2021/01"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="O que devemos saber à medida que novas cepas de SARS-CoV-2 ganham terreno em todo o mundo" data-src="https://s7d1.scene7.com/is/image/CENODS/20210111lnp50-sarscov2-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20210111lnp50-sarscov2-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-O-que-devemos-saber-medida/99/web/2021/01">O que devemos saber à medida que novas cepas de SARS-CoV-2 ganham terreno em todo o mundo</a></h2> <div class="deck">A variante detectada pela primeira vez no Reino Unido se espalha para os estados dos EUA, enquanto outra variante gera preocupação</div> <div class="date">January 11, 2021</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-vacina-da-Pfizer-contra-COVID/98/i48"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A vacina da Pfizer contra a COVID-19 é lançada nos EUA" data-src="https://s7d1.scene7.com/is/image/CENODS/09848-scicon50-pfizer-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09848-scicon50-pfizer-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-vacina-da-Pfizer-contra-COVID/98/i48">A vacina da Pfizer contra a COVID-19 é lançada nos EUA</a></h2> <div class="deck">As vacinas começaram, mas há um longo caminho pela frente para esta e outras vacinas</div> <div class="date">December 20, 2020</div> </div> <div class="grid-item 2020"> <a href="/policy/global-health/pt-prioridades-de-Biden-Harris-incluem/98/i44"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="As prioridades de Biden-Harris incluem áreas importantes para químicos e a química" data-src="https://s7d1.scene7.com/is/image/CENODS/09844-scicon50-victory-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09844-scicon50-victory-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/policy/global-health/pt-prioridades-de-Biden-Harris-incluem/98/i44">As prioridades de Biden-Harris incluem áreas importantes para químicos e a química</a></h2> <div class="deck">Políticas revisadas planejadas para controlar o coronavírus, recuperar a economia, enfrentar a desigualdade e combater as mudanças climáticas</div> <div class="date">November 9, 2020</div> </div> <div class="grid-item 2020"> <a href="/people/awards/es-CEN-e-CAS-apresentam-prmios/98/i38"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="C&EN e CAS apresentam prêmios Mulheres Brasileiras na Química" data-src="https://s7d1.scene7.com/is/image/CENODS/20200930lnp1-all3-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20200930lnp1-all3-1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/awards/es-CEN-e-CAS-apresentam-prmios/98/i38">C&EN e CAS apresentam prêmios Mulheres Brasileiras na Química</a></h2> <div class="deck">As laureadas foram homenageadas durante encontro virtual da Sociedade Brasileira de Química em outubro</div> <div class="date">October 5, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/oncology/pt-Compra-de-US-21-bilhes/98/i36"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Compra de US$ 21 bilhões da Immunomedics pela Gilead impulsiona a indústria dos medicamentos conjugados de anticorpos (ADC)" data-src="https://s7d1.scene7.com/is/image/CENODS/09836-scicon50-trod-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09836-scicon50-trod-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/oncology/pt-Compra-de-US-21-bilhes/98/i36">Compra de US$ 21 bilhões da Immunomedics pela Gilead impulsiona a indústria dos medicamentos conjugados de anticorpos (ADC)</a></h2> <div class="deck">Aquisição expande o grande portfólio oncológico da empresa de biotecnologia para tumores sólidos</div> <div class="date">September 21, 2020</div> </div> <div class="grid-item 2020 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2020"> <a href="/acs-news/acs-meeting-news/pt-ACS-realiza-Encontro-Virtual-de/98/i32"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="ACS realiza Encontro Virtual de Outono de 2020" data-src="https://s7d1.scene7.com/is/image/CENODS/09832-scicon50-outreach-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09832-scicon50-outreach-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/acs-news/acs-meeting-news/pt-ACS-realiza-Encontro-Virtual-de/98/i32">ACS realiza Encontro Virtual de Outono de 2020</a></h2> <div class="deck">Apesar das mudanças resultantes da pandemia, a sociedade indica que os encontros devem continuar, embora virtualmente</div> <div class="date">August 24, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-dexametasona-parece-ajudar-casos-graves/98/i24"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A dexametasona parece ajudar casos graves de COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09824-scicon50-dexa-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09824-scicon50-dexa-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-dexametasona-parece-ajudar-casos-graves/98/i24">A dexametasona parece ajudar casos graves de COVID-19</a></h2> <div class="deck">O esteroide barato e bem estudado pode oferecer aos médicos outra ferramenta na pandemia de coronavírus</div> <div class="date">July 22, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-Estudo-gentico-sugere-que-o/98/i23"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Estudo genético sugere que o tipo sanguíneo das pessoas pode afetar o risco de contrair a COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09823-scicon51-typeo-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09823-scicon51-typeo-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-Estudo-gentico-sugere-que-o/98/i23">Estudo genético sugere que o tipo sanguíneo das pessoas pode afetar o risco de contrair a COVID-19</a></h2> <div class="deck">Pessoas com sangue tipo A podem ter maior risco de contrair uma doença grave, enquanto pessoas com tipo O podem ter menor risco</div> <div class="date">July 15, 2020</div> </div> <div class="grid-item 2020"> <a href="/analytical-chemistry/diagnostics/pt-Pases-em-desenvolvimento-enfrentam-desafios/98/i27"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Países em desenvolvimento enfrentam desafios com relação aos diagnósticos em meio ao surto da pandemia de COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09827-feature50-map-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09827-feature50-map-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/diagnostics/pt-Pases-em-desenvolvimento-enfrentam-desafios/98/i27">Países em desenvolvimento enfrentam desafios com relação aos diagnósticos em meio ao surto da pandemia de COVID-19</a></h2> <div class="deck">A Fundação para Novos Diagnósticos Inovadores está à frente dos esforços para expandir a testagem em países com rendas baixa e média</div> <div class="date">July 13, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-Preciso-dos-testes-de-anticorpos-da-COVID-19-questionada/98/i26"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Precisão dos testes de anticorpos da COVID-19 questionada" data-src="https://s7d1.scene7.com/is/image/CENODS/09826-scicon50-test-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09826-scicon50-test-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-Preciso-dos-testes-de-anticorpos-da-COVID-19-questionada/98/i26">Precisão dos testes de anticorpos da COVID-19 questionada</a></h2> <div class="deck">Uma revisão sistemática constata que a qualidade dos resultados do diagnóstico depende fortemente de quando as amostras dos pacientes foram coletadas.</div> <div class="date">July 6, 2020</div> </div> <div class="grid-item 2020"> <a href="/research-integrity/ethics/pt-Ensaio-que-critica-os-esforos-para-aumentar-a-diversidade/98/i23"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Ensaio que critica os esforços para aumentar a diversidade na síntese orgânica excluído após reação dos químicos" data-src="https://s7d1.scene7.com/is/image/CENODS/09823-scicon50-hudlicky-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09823-scicon50-hudlicky-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/research-integrity/ethics/pt-Ensaio-que-critica-os-esforos-para-aumentar-a-diversidade/98/i23">Ensaio que critica os esforços para aumentar a diversidade na síntese orgânica excluído após reação dos químicos</a></h2> <div class="deck">A publicação de um ensaio pessoal em Angewandte Chemie aponta para problemas mais profundos na comunidade, dizem os químicos</div> <div class="date">June 15, 2020</div> </div> <div class="grid-item 2020"> <a href="/analytical-chemistry/diagnostics/pt-Os-testes-de-antgeno-da-COVID-19-chegaram-aos-EUA/98/i22"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Os testes de antígeno da COVID-19 chegaram aos EUA, mas nem todos estão correndo para obtê-los" data-src="https://s7d1.scene7.com/is/image/CENODS/09822-scicon50-swab-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09822-scicon50-swab-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/diagnostics/pt-Os-testes-de-antgeno-da-COVID-19-chegaram-aos-EUA/98/i22">Os testes de antígeno da COVID-19 chegaram aos EUA, mas nem todos estão correndo para obtê-los</a></h2> <div class="deck">Os testes são menos confiáveis do que outros diagnósticos, e alguns grandes laboratórios afirmam que não os oferecerão imediatamente</div> <div class="date">June 8, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-CanSino-publica-os-primeiros-dados-da-vacina-para-a-COVID-19-para-resposta-silenciosa/98/i21"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A CanSino publica os primeiros dados da vacina para a COVID-19 para resposta silenciosa" data-src="https://s7d1.scene7.com/is/image/CENODS/09821-scicon50-vials-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09821-scicon50-vials-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-CanSino-publica-os-primeiros-dados-da-vacina-para-a-COVID-19-para-resposta-silenciosa/98/i21">A CanSino publica os primeiros dados da vacina para a COVID-19 para resposta silenciosa</a></h2> <div class="deck">A empresa chinesa de vacinas está avançando com ensaios clínicos na China e no Canadá, apesar dos resultados mistos de seu estudo de Fase I</div> <div class="date">June 1, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-Moderna-fornece-um-olhar-superficial/98/i20"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Moderna fornece um olhar superficial aos primeiros dados da vacina para a COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09820-scicon50-norwood-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09820-scicon50-norwood-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-Moderna-fornece-um-olhar-superficial/98/i20">Moderna fornece um olhar superficial aos primeiros dados da vacina para a COVID-19</a></h2> <div class="deck">A empresa diz que sua vacina experimental de mRNA é segura e induziu níveis promissores de anticorpos em um pequeno ensaio clínico de fase I</div> <div class="date">May 25, 2020</div> </div> <div class="grid-item 2020"> <a href="/synthesis/c-h-activation/pt-Catalisador-Ir-ataca-ligaes-C/98/i19"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Catalisador Ir ataca ligações C-H fortes sem direcionar o grupo" data-src="https://s7d1.scene7.com/is/image/CENODS/09819-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09819-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/c-h-activation/pt-Catalisador-Ir-ataca-ligaes-C/98/i19">Catalisador Ir ataca ligações C-H fortes sem direcionar o grupo</a></h2> <div class="deck">Nova química poderia modificar moléculas mais complexas que as reações de ativação de C-H anteriores</div> <div class="date">May 18, 2020</div> </div> <div class="grid-item 2020"> <a href="/analytical-chemistry/diagnostics/pt-Estudos-em-clulas-sugerem-que/98/i18"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Estudos em células sugerem que alguns medicamentos reaproveitados podem bloquear a replicação do SARS-CoV-2" data-src="https://s7d1.scene7.com/is/image/CENODS/09818-scicon50-structs-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09818-scicon50-structs-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/diagnostics/pt-Estudos-em-clulas-sugerem-que/98/i18">Estudos em células sugerem que alguns medicamentos reaproveitados podem bloquear a replicação do SARS-CoV-2</a></h2> <div class="deck">Os experimentos seguem um estudo anterior que identificou 69 compostos que poderiam interromper possíveis interações entre proteínas virais e humanas</div> <div class="date">May 1, 2020</div> </div> <div class="grid-item 2020 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/drug-development/pt-O-remdesivir-da-Gilead-obtm/98/i17"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="O remdesivir da Gilead obtém autorização de uso emergencial com base em dados preliminares da COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09817-scicon50-fauci-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09817-scicon50-fauci-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/drug-development/pt-O-remdesivir-da-Gilead-obtm/98/i17">O remdesivir da Gilead obtém autorização de uso emergencial com base em dados preliminares da COVID-19</a></h2> <div class="deck">Resultados limitados de um estudo do NIAID sugerem que o medicamento ajuda pessoas com COVID-19 a se recuperarem mais rapidamente</div> <div class="date">April 29, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-Durante-pandemia-de-coronavrus-os/98/i17"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Durante a pandemia de coronavírus, os hospitais adotaram medidas sem precedentes para desinfetar máscaras faciais N95" data-src="https://s7d1.scene7.com/is/image/CENODS/09817-main50-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09817-main50-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-Durante-pandemia-de-coronavrus-os/98/i17">Durante a pandemia de coronavírus, os hospitais adotaram medidas sem precedentes para desinfetar máscaras faciais N95</a></h2> <div class="deck">Com equipamentos de proteção em falta, as unidades de saúde estão descontaminando e reutilizando itens projetados para serem descartáveis</div> <div class="date">April 27, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-Vacinas-para-COVID-19-avanpara/98/i15"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Vacinas para COVID-19 avançam para a fase de ensaios clínicos" data-src="https://s7d1.scene7.com/is/image/CENODS/09815-scicon50-lab-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09815-scicon50-lab-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-Vacinas-para-COVID-19-avanpara/98/i15">Vacinas para COVID-19 avançam para a fase de ensaios clínicos</a></h2> <div class="deck">Testes de 10 ou mais novas vacinas podem começar até meados de maio</div> <div class="date">April 20, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/biologics/pt-Procurando-uma-cura-para-o/98/i14"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Procurando uma cura para o coronavírus no sangue" data-src="https://s7d1.scene7.com/is/image/CENODS/09814-cover4-50-regeneron-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09814-cover4-50-regeneron-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/biologics/pt-Procurando-uma-cura-para-o/98/i14">Procurando uma cura para o coronavírus no sangue</a></h2> <div class="deck">Os cientistas recorrem ao plasma convalescente, terapia hiperimune e anticorpos monoclonais para tratar a COVID-19</div> <div class="date">April 13, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-Por-que-o-melhor-material/98/i14"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Por que o melhor material para uma máscara facial caseira para o coronavírus é difícil de identificar" data-src="https://s7d1.scene7.com/is/image/CENODS/09814-scicon50-sewing-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09814-scicon50-sewing-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-Por-que-o-melhor-material/98/i14">Por que o melhor material para uma máscara facial caseira para o coronavírus é difícil de identificar</a></h2> <div class="deck">Variáveis em tecidos, ajuste e comportamento do usuário podem influenciar a eficácia com que uma máscara pode bloquear a propagação do vírus</div> <div class="date">April 13, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-Serque-o-coronavrus-ajudarvacinas-de/98/i14"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Será que o coronavírus ajudará as vacinas de mRNA e DNA a provar seu valor?" data-src="https://s7d1.scene7.com/is/image/CENODS/09814-cover2-50-translate-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09814-cover2-50-translate-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-Serque-o-coronavrus-ajudarvacinas-de/98/i14">Será que o coronavírus ajudará as vacinas de mRNA e DNA a provar seu valor?</a></h2> <div class="deck">À medida que as vacinas baseadas em genes estão sendo projetadas e testadas em velocidades sem precedentes para combater o COVID-19, os cientistas se perguntam se esse será o momento decisivo da tecnologia.</div> <div class="date">April 13, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-O-que-os-dados-iniciais-do-remdesivir-nos-dizem-sobre-o-combate-ao-COVID-19/98/i13"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="O que os dados iniciais do remdesivir nos dizem sobre o combate ao COVID-19?" data-src="https://s7d1.scene7.com/is/image/CENODS/09813-feature50-remdesivir-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09813-feature50-remdesivir-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-O-que-os-dados-iniciais-do-remdesivir-nos-dizem-sobre-o-combate-ao-COVID-19/98/i13">O que os dados iniciais do remdesivir nos dizem sobre o combate ao COVID-19?</a></h2> <div class="deck">O antiviral da Gilead Sciences está passando por vários estudos em estágio avançado para tratamento de infecções causadas pelo coronavírus. Não espere resultados extraordinários, afirmam especialistas em doenças infecciosas</div> <div class="date">April 6, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-O-mapeamento-de-protenas-encontra-69-tratamentos/98/i12"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="O mapeamento de proteínas encontra 69 tratamentos potenciais para o COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09812-scicon50-complex-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09812-scicon50-complex-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-O-mapeamento-de-protenas-encontra-69-tratamentos/98/i12">O mapeamento de proteínas encontra 69 tratamentos potenciais para o COVID-19</a></h2> <div class="deck">Muitos são medicamentos aprovados pela FDA que podem ser reaproveitados</div> <div class="date">March 30, 2020</div> </div> <div class="grid-item 2020"> <a href="/biological-chemistry/infectious-disease/pt-Como-sabemos-que-os-desinfetantes/98/i11"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Como sabemos que os desinfetantes conseguem matar o coronavírus COVID-19" data-src="https://s7d1.scene7.com/is/image/CENODS/09811-scicon50-spray-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09811-scicon50-spray-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/infectious-disease/pt-Como-sabemos-que-os-desinfetantes/98/i11">Como sabemos que os desinfetantes conseguem matar o coronavírus COVID-19</a></h2> <div class="deck">O novo coronavírus é um dos tipos de vírus mais fáceis de anular, entretanto, nos faltam dados específicos sobre o SARS-CoV-2 </div> <div class="date">March 23, 2020</div> </div> <div class="grid-item 2020"> <a href="/pharmaceuticals/vaccines/pt-Gilead-e-Moderna-saem-na-frente-em-tratamentos-para-o-Coronavirus/98/i9"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Gilead e Moderna saem na frente em tratamentos para o Coronavírus" data-src="https://s7d1.scene7.com/is/image/CENODS/09809-buscon50-moderna-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09809-buscon50-moderna-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/vaccines/pt-Gilead-e-Moderna-saem-na-frente-em-tratamentos-para-o-Coronavirus/98/i9">Gilead e Moderna saem na frente em tratamentos para o Coronavírus</a></h2> <div class="deck">A Gilead está à frente na criação de um antiviral, enquanto a Moderna está em busca de uma nova vacina mRNA</div> <div class="date">March 9, 2020</div> </div> <div class="grid-item 2020"> <a href="/environment/water/pt-Dessalinizao-solar-supereficiente/98/i8"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Dessalinização solar supereficiente" data-src="https://s7d1.scene7.com/is/image/CENODS/09808-scicon50-device-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09808-scicon50-device-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/water/pt-Dessalinizao-solar-supereficiente/98/i8">Dessalinização solar supereficiente</a></h2> <div class="deck">Sistema aproveita o calor residual para produzir água potável suficiente para um adulto em uma hora</div> <div class="date">February 24, 2020</div> </div> <div class="grid-item 2020 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2020"> <a href="/policy/chemical-regulation/pt-O-nmero-de-produtos-qumicos/98/i7"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="O número de produtos químicos no comércio foi amplamente subestimado" data-src="https://s7d1.scene7.com/is/image/CENODS/09807-scicon50-barrel-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09807-scicon50-barrel-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/policy/chemical-regulation/pt-O-nmero-de-produtos-qumicos/98/i7">O número de produtos químicos no comércio foi amplamente subestimado</a></h2> <div class="deck">Cientistas montam um primeiro inventário global listando o triplo do número de produtos químicos no mercado em listas anteriores</div> <div class="date">February 17, 2020</div> </div> <div class="grid-item 2020"> <a href="/physical-chemistry/pt-Novas-experincias-apresentam-outra-pretenso/98/i6"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Novas experiências apresentam outra pretensão ao hidrogênio metálico" data-src="https://s7d1.scene7.com/is/image/CENODS/09806-scicon50-metalh-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09806-scicon50-metalh-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/pt-Novas-experincias-apresentam-outra-pretenso/98/i6">Novas experiências apresentam outra pretensão ao hidrogênio metálico</a></h2> <div class="deck">O estudo pode abrir uma nova porta para o material previsto, mas ele permanece fora de alcance</div> <div class="date">February 10, 2020</div> </div> <div class="grid-item 2020"> <a href="/materials/2-d-materials/pt-Como-fazer-grafeno-pristino-partir/98/i5"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Como fazer grafeno pristino a partir do lixo em um <i>flash</i>" data-src="https://s7d1.scene7.com/is/image/CENODS/09805-scicon50-copper-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09805-scicon50-copper-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/2-d-materials/pt-Como-fazer-grafeno-pristino-partir/98/i5">Como fazer grafeno pristino a partir do lixo em um <i>flash</i></a></h2> <div class="deck">O método de aquecimento eficiente e de baixo custo transforma carvão e plástico em grafeno de alta qualidade</div> <div class="date">February 3, 2020</div> </div> <div class="grid-item 2020"> <a href="/business/investment/pt-Na-JP-Morgan-Healthcare-Conference/98/i3"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Na J.P. Morgan Healthcare Conference, um início lento da M&A da indústria de biotecnologia e farmacêutica" data-src="https://s7d1.scene7.com/is/image/CENODS/09803-scicon50-westin-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09803-scicon50-westin-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/business/investment/pt-Na-JP-Morgan-Healthcare-Conference/98/i3">Na J.P. Morgan Healthcare Conference, um início lento da M&A da indústria de biotecnologia e farmacêutica</a></h2> <div class="deck">Especialistas ainda esperam grandes negociações em 2020, apesar de uma reunião rotineira</div> <div class="date">January 20, 2020</div> </div> <div class="grid-item 2020"> <a href="/safety/lab-safety/pt-Agentes-de-acoplamento-de-peptdeos/98/i2"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Agentes de acoplamento de peptídeos podem causar reações alérgicas graves" data-src="https://s7d1.scene7.com/is/image/CENODS/09802-scicon50-hives-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09802-scicon50-hives-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/safety/lab-safety/pt-Agentes-de-acoplamento-de-peptdeos/98/i2">Agentes de acoplamento de peptídeos podem causar reações alérgicas graves</a></h2> <div class="deck">Pesquisadores podem desenvolver sensibilidades aos compostos, ao ponto de causar anafilaxia</div> <div class="date">January 13, 2020</div> </div> <div class="grid-item 2019"> <a href="/physical-chemistry/computational-chemistry/pt-Programa-de-planejamento-de-sntese/97/i47"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Programa de planejamento de síntese baseia-se em parceria homem-máquina" data-src="https://s7d1.scene7.com/is/image/CENODS/09747-scicon50-bimato-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09747-scicon50-bimato-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/computational-chemistry/pt-Programa-de-planejamento-de-sntese/97/i47">Programa de planejamento de síntese baseia-se em parceria homem-máquina</a></h2> <div class="deck">Programa híbrido combina insights humanos e aprendizado de máquina para desenvolver rotas sintéticas</div> <div class="date">December 2, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/catalysis/pt-Fazendo-etileno-partir-ar-e/97/i46"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Fazendo etileno a partir do ar e elétrons" data-src="https://s7d1.scene7.com/is/image/CENODS/09746-scicon50-catalyst-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09746-scicon50-catalyst-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/catalysis/pt-Fazendo-etileno-partir-ar-e/97/i46">Fazendo etileno a partir do ar e elétrons</a></h2> <div class="deck">Grupo sintetiza eletroquimicamente o precursor de polietileno a partir de CO<sub>2</sub> </div> <div class="date">November 25, 2019</div> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/neuroscience/pt-Uma-falha-gentica-pode-prevenir/97/i44"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Uma falha genética pode prevenir a doença de Alzheimer" data-src="https://s7d1.scene7.com/is/image/CENODS/09744-scicon50-brains-new-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09744-scicon50-brains-new-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/neuroscience/pt-Uma-falha-gentica-pode-prevenir/97/i44">Uma falha genética pode prevenir a doença de Alzheimer</a></h2> <div class="deck">Pesquisadores pretendem desenvolver novas terapias que imitam os efeitos da mutação</div> <div class="date">November 5, 2019</div> </div> <div class="grid-item 2019"> <a href="/people/nobel-prize/pt-Pioneiros-das-baterias-de-es/97/i40"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Pioneiros das baterias de iões deíons lítio ganham o Préêmio Nobel da Química 2019" data-src="https://s7d1.scene7.com/is/image/CENODS/09740-scicon50-mugs-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09740-scicon50-mugs-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/nobel-prize/pt-Pioneiros-das-baterias-de-es/97/i40">Pioneiros das baterias de iões deíons lítio ganham o Préêmio Nobel da Química 2019</a></h2> <div class="deck">John B. Goodenough, M. Stanley Whittingham e Akira Yoshino dividirão o prêmio pelo desenvolvimento da química das baterias recarregáveis </div> <div class="date">October 14, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/pt-Os-qumicos-fazem-matrizes-de/97/i39"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Os químicos fazem matrizes de azidas prontas para a química de clique de forma eficiente e segura" data-src="https://s7d1.scene7.com/is/image/CENODS/09739-scicon50-scheme?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09739-scicon50-scheme?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/pt-Os-qumicos-fazem-matrizes-de/97/i39">Os químicos fazem matrizes de azidas prontas para a química de clique de forma eficiente e segura</a></h2> <div class="deck">A reação converte aminas primárias em azidas para fazer grandes bibliotecas de compostos</div> <div class="date">October 7, 2019</div> </div> <div class="grid-item 2019"> <a href="/environment/persistent-pollutants/pt-Micrbio-de-reas-pantanosas-desintoxica/97/i38"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Micróbio de áreas pantanosas desintoxica contaminantes PFAS" data-src="https://s7d1.scene7.com/is/image/CENODS/09738-scicon50-sampling1?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09738-scicon50-sampling1?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/persistent-pollutants/pt-Micrbio-de-reas-pantanosas-desintoxica/97/i38">Micróbio de áreas pantanosas desintoxica contaminantes PFAS</a></h2> <div class="deck">Cientistas descobrem um micróbio que corta átomos de flúor de substâncias tóxicas de perfluoralquil</div> <div class="date">September 30, 2019</div> </div> <div class="grid-item 2019 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/cancer/pt-Algumas-molculas-anticncer-esto-fora/97/i37"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Algumas moléculas anticâncer estão fora do alvo" data-src="https://s7d1.scene7.com/is/image/CENODS/09737-scicon50-cancercellspt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09737-scicon50-cancercellspt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/cancer/pt-Algumas-molculas-anticncer-esto-fora/97/i37">Algumas moléculas anticâncer estão fora do alvo</a></h2> <div class="deck">Experimentos em linhagens celulares sugerem que as moléculas matam células cancerígenas através de alvos que elas não foram projetadas para atingir</div> <div class="date">September 23, 2019</div> </div> <div class="grid-item 2019"> <a href="/physical-chemistry/chemical-bonding/pt-Qumicos-usam-manipulao-mica-para/97/i33"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Químicos usam manipulação atômica para empurrar ciclo[18]carbono à existência" data-src="https://s7d1.scene7.com/is/image/CENODS/09733-scicon50-structureweb?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09733-scicon50-structureweb?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/physical-chemistry/chemical-bonding/pt-Qumicos-usam-manipulao-mica-para/97/i33">Químicos usam manipulação atômica para empurrar ciclo[18]carbono à existência</a></h2> <div class="deck">Microscopia de sonda ajuda pesquisadores a criar e visualizar um alótropo de carbono que foi previsto pela primeira vez na década de 80</div> <div class="date">August 26, 2019</div> </div> <div class="grid-item 2019"> <a href="/materials/polymers/pt-Super-absorvente-absorve-metano-sob/97/i29"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Super absorvente absorve metano sob condições brandas" data-src="https://s7d1.scene7.com/is/image/CENODS/09729-scicon50-synthcxd?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09729-scicon50-synthcxd?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/polymers/pt-Super-absorvente-absorve-metano-sob/97/i29">Super absorvente absorve metano sob condições brandas</a></h2> <div class="deck">Polímero flexível, poroso “respira” enquanto armazena e libera quantidades recorde de combustível gasoso</div> <div class="date">August 14, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/pt-Automatizando-sntese-planejamento-execuo/97/i32"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Automatizando a síntese do planejamento à execução" data-src="https://s7d1.scene7.com/is/image/CENODS/09732-scicon50-robotcxd?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09732-scicon50-robotcxd?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/pt-Automatizando-sntese-planejamento-execuo/97/i32">Automatizando a síntese do planejamento à execução</a></h2> <div class="deck">Com um pouco de ajuda humana, inteligência artificial e um robô fazem moléculas de fármacos</div> <div class="date">August 12, 2019</div> </div> <div class="grid-item 2019"> <a href="/analytical-chemistry/forensic-science/pt-Poderiam-protenas-encontradas-em-fsseis/97/i27"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Poderiam proteínas encontradas em fósseis de dinossauros vir de micróbios?" data-src="https://s7d1.scene7.com/is/image/CENODS/09727-scicon50-farcxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09727-scicon50-farcxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/forensic-science/pt-Poderiam-protenas-encontradas-em-fsseis/97/i27">Poderiam proteínas encontradas em fósseis de dinossauros vir de micróbios?</a></h2> <div class="deck">Um novo estudo continua o debate sobre se os cientistas descobriram ou não fragmentos de proteínas de dinossauros reais</div> <div class="date">July 3, 2019</div> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/pt-JoAnne-Stubbe-nomeada-para-Medalha/97/i25"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="JoAnne Stubbe nomeada para a Medalha Priestley 2020" data-src="https://s7d1.scene7.com/is/image/CENODS/09725-scicon50-stubbecxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09725-scicon50-stubbecxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/pt-JoAnne-Stubbe-nomeada-para-Medalha/97/i25">JoAnne Stubbe nomeada para a Medalha Priestley 2020</a></h2> <div class="deck">A bioquímica do MIT está sendo homenageada pelo seu trabalho na compreensão dos mecanismos de enzimas</div> <div class="date">June 18, 2019</div> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/biochemistry/pt-Bactrias-nos-nossos-intestinos-destroem/97/i23"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Bactérias nos nossos intestinos destroem dezenas fármacos populares" data-src="https://s7d1.scene7.com/is/image/CENODS/09723-scicon50-diltiazem-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09723-scicon50-diltiazem-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/biochemistry/pt-Bactrias-nos-nossos-intestinos-destroem/97/i23">Bactérias nos nossos intestinos destroem dezenas fármacos populares</a></h2> <div class="deck">Estudo sugere que os fabricantes de fármacos devem considerar o metabolismo bacteriano ao projetar e testar novos fármacos</div> <div class="date">June 3, 2019</div> </div> <div class="grid-item 2019"> <a href="/environment/persistent-pollutants/pt-Os-governos-endossam-proibio-global/97/i19"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Os governos endossam a proibição global de PFOA, com algumas isenções" data-src="https://s7d1.scene7.com/is/image/CENODS/09719-polcon50-foams-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09719-polcon50-foams-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/persistent-pollutants/pt-Os-governos-endossam-proibio-global/97/i19">Os governos endossam a proibição global de PFOA, com algumas isenções</a></h2> <div class="deck">Restrições em vigor na espuma de combate a incêndios com PFOA, PFOS ou ambos</div> <div class="date">May 6, 2019</div> </div> <div class="grid-item 2019"> <a href="/materials/3-d-printing/pt-Corante-alimenticio-amarelo-ajuda-os-pesquisadores-a-imprimir-estruturas/97/i18"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Corante alimentício amarelo ajuda os pesquisadores a imprimir estruturas semelhantes a órgãos" data-src="https://s7d1.scene7.com/is/image/CENODS/09718-scicon50-tartrazine?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09718-scicon50-tartrazine?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/materials/3-d-printing/pt-Corante-alimenticio-amarelo-ajuda-os-pesquisadores-a-imprimir-estruturas/97/i18">Corante alimentício amarelo ajuda os pesquisadores a imprimir estruturas semelhantes a órgãos</a></h2> <div class="deck">A visão química permite que pesquisadores imitem estruturas complexas de órgãos e redes de vasos sanguíneos</div> <div class="date">May 2, 2019</div> </div> <div class="grid-item 2019"> <a href="/physical-chemistry/astrochemistry/pt-Primeiras-molculas-universo-finalmente-encontradas/97/i16"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Primeiras moléculas do universo finalmente encontradas no espaço" data-src="https://s7d1.scene7.com/is/image/CENODS/09716-leadcon-nebula?$responsive$&wid=700&qlt=90,0&resMode=sharp2&crop=81.25,321.875,2846.875,1642.1875" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09716-leadcon-nebula?$responsive$&wid=700&qlt=90,0&resMode=sharp2&crop=81.25,321.875,2846.875,1642.1875 1x,"/> </a> <h2><a href="/physical-chemistry/astrochemistry/pt-Primeiras-molculas-universo-finalmente-encontradas/97/i16">Primeiras moléculas do universo finalmente encontradas no espaço</a></h2> <div class="deck">A observação de moléculas há muito procuradas pode mudar modelos astronômicos </div> <div class="date">April 30, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/reagents/pt-Grnulos-de-vidro-ajudam-robs/97/i13"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Grânulos de vidro ajudam robôs a entregar minúsculas quantidades de reagentes" data-src="https://s7d1.scene7.com/is/image/CENODS/09713-leadcon-powders?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09713-leadcon-powders?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/reagents/pt-Grnulos-de-vidro-ajudam-robs/97/i13">Grânulos de vidro ajudam robôs a entregar minúsculas quantidades de reagentes</a></h2> <div class="deck">ChemBeads oferece dosagem em microgramas de reagentes sólidos para rastreio de reação de alta produtividade</div> <div class="date">April 15, 2019</div> </div> <div class="grid-item 2019 article-small-ads"> <div class="landing-page-ads landingads-noborder clearfix"> <div class='adunit' data-adunit='cen' data-dimensions="300x250" data-targeting='{"Collection":"portugese"}'></div> </div> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> </div> <div class="grid-item 2019"> <a href="/research-integrity/reproducibility/pt-Esforo-para-reproduzir-ensaios-brasileiros-de-pesquisa/97/i14"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Esforço para reproduzir ensaios brasileiros de pesquisa terão início" data-srcset=" 1x,"/> </a> <h2><a href="/research-integrity/reproducibility/pt-Esforo-para-reproduzir-ensaios-brasileiros-de-pesquisa/97/i14">Esforço para reproduzir ensaios brasileiros de pesquisa terão início</a></h2> <div class="deck">Ensaios direcionados incluem amplificação de mRNA e avaliação da viabilidade celular</div> <div class="date">April 3, 2019</div> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/pt-Novo-mtodo-intercepta-enzima-inflamatria/97/i11"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Novo método intercepta enzima inflamatória da fibrose cística no ato" data-src="https://s7d1.scene7.com/is/image/CENODS/09711-scicon50-matteo?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09711-scicon50-matteo?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/pt-Novo-mtodo-intercepta-enzima-inflamatria/97/i11">Novo método intercepta enzima inflamatória da fibrose cística no ato</a></h2> <div class="deck">Uma combinação de duas técnicas confere uma forma clinicamente viável de medir a resposta inflamatória em doenças pulmonares crônicas</div> <div class="date">March 25, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/c-h-activation/pt-Mtodo-verde-produz-cido-metanosulfnico/97/i12"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Método verde produz ácido metanosulfônico a partir do metano" data-src="https://s7d1.scene7.com/is/image/CENODS/09712-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09712-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/synthesis/c-h-activation/pt-Mtodo-verde-produz-cido-metanosulfnico/97/i12">Método verde produz ácido metanosulfônico a partir do metano</a></h2> <div class="deck">O processo de baixa temperatura, livre de metal produz o ácido forte biodegradável ao reagir metano com trióxido de enxofre </div> <div class="date">March 21, 2019</div> </div> <div class="grid-item 2019"> <a href="/people/profiles/pt-qumica-brasileira-Joana-DArc-Flix/97/i10"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="A química brasileira Joana D’Arc Félix de Sousa em sua trajetória da pobreza até inventora e professora" data-src="https://s7d1.scene7.com/is/image/CENODS/09710-scicon30-felix-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09710-scicon30-felix-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/people/profiles/pt-qumica-brasileira-Joana-DArc-Flix/97/i10">A química brasileira Joana D’Arc Félix de Sousa em sua trajetória da pobreza até inventora e professora</a></h2> <div class="deck">Filha de um profissional de curtume e de uma empregada doméstica, ela agora defende a juventude desprivilegiada</div> <div class="date">March 10, 2019</div> </div> <div class="grid-item 2019"> <a href="/synthesis/pt-Catalisador-de-metal-duplo-constroi/97/i8"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Catalisador de metal duplo constroi anéis de 5 carbonos" data-src="https://s7d1.scene7.com/is/image/CENODS/09708-leadcon-dinickel-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2&crop=0.0,31.25,3123.4375,2062.5" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09708-leadcon-dinickel-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2&crop=0.0,31.25,3123.4375,2062.5 1x,"/> </a> <h2><a href="/synthesis/pt-Catalisador-de-metal-duplo-constroi/97/i8">Catalisador de metal duplo constroi anéis de 5 carbonos</a></h2> <div class="deck">Átomos de níquel lado a lado impulsionam uma cicloadição de 4+1, fornecendo um possível análogo de 5 carbonos para a clássica reação de Diels-Alder</div> <div class="date">February 21, 2019</div> </div> <div class="grid-item 2019"> <a href="/biological-chemistry/cancer/pt-Toxina-E-coli-relacionada-com-DNA-de-danos-do-cancer/97/i7"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Toxina <i>E. coli</i> relacionada com DNA de danos do câncer do cólon" data-src="https://s7d1.scene7.com/is/image/CENODS/09707-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09707-scicon50-scheme-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/biological-chemistry/cancer/pt-Toxina-E-coli-relacionada-com-DNA-de-danos-do-cancer/97/i7">Toxina <i>E. coli</i> relacionada com DNA de danos do câncer do cólon</a></h2> <div class="deck">A colibactina alquila o DNA em células que revestem os intestinos, possivelmente desencadeando o primeiro passo em direção ao câncer</div> <div class="date">February 14, 2019</div> </div> <div class="grid-item 2019"> <a href="/pharmaceuticals/drug-delivery/pt-Dispositivo-ingervel-inspirado-na-tartaruga/97/i6"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Dispositivo ingerível, inspirado na tartaruga, vira na direção vertical para injetar insulina no interior do estômago" data-src="https://s7d1.scene7.com/is/image/CENODS/09706-scicon50-ingestible?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09706-scicon50-ingestible?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/pharmaceuticals/drug-delivery/pt-Dispositivo-ingervel-inspirado-na-tartaruga/97/i6">Dispositivo ingerível, inspirado na tartaruga, vira na direção vertical para injetar insulina no interior do estômago</a></h2> <div class="deck">O estudo em porcos sugere que o dispositivo pode substituir comprimidos ineficazes de insulina e evita a necessidade de injeções</div> <div class="date">February 7, 2019</div> </div> <div class="grid-item 2019"> <a href="/environment/sustainability/pt-Industria-de-plasticos-lanca-iniciativa-contra-residuos/97/i3"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Indústria de plásticos lança iniciativa contra resíduos" data-src="https://s7d1.scene7.com/is/image/CENODS/09703-buscon50-muncarcxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09703-buscon50-muncarcxd-pt?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/environment/sustainability/pt-Industria-de-plasticos-lanca-iniciativa-contra-residuos/97/i3">Indústria de plásticos lança iniciativa contra resíduos</a></h2> <div class="deck">Empresas químicas, outras gastarão até 1,5 bilhões de dólares para enfrentar os plásticos oceânicos</div> <div class="date">February 1, 2019</div> </div> <div class="grid-item 2018"> <a href="/analytical-chemistry/pt-Novas-definicoes-para-o-quilograma-e-mol/96/i47"> <img class="lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" alt="Novas definições para o quilograma e mol" data-src="https://s7d1.scene7.com/is/image/CENODS/09647-leadcon-kilogram?$responsive$&wid=700&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09647-leadcon-kilogram?$responsive$&wid=700&qlt=90,0&resMode=sharp2 1x,"/> </a> <h2><a href="/analytical-chemistry/pt-Novas-definicoes-para-o-quilograma-e-mol/96/i47">Novas definições para o quilograma e mol</a></h2> <div class="deck">O voto passa a redefinir todas as unidades SI em termos de constantes físicas</div> <div class="date">November 16, 2018</div> </div> </div> <script> filterSelection("all") function filterSelection(c) { var x, i; var collectionYear=[]; x = document.getElementsByClassName("grid-item"); if (c == "all") c = ""; for (i = 0; i < x.length; i++) { collectionYear.push(x[i].className); removeClass(x[i], "show"); if (x[i].className.indexOf(c) > -1) addClass(x[i], "show"); } var collectionString = collectionYear.toString(); if(collectionString.includes(c)) { // console.log("YES : "+c); $('#collectionBtnContainer').addClass("collectionBoxFull"); $('#collectionBtnContainer').removeClass("collectionBoxEmpty"); } else{ // console.log("NO : "+c); $('#collectionBtnContainer').addClass("collectionBoxEmpty"); $('#collectionBtnContainer').removeClass("collectionBoxFull"); } } function addClass(element, name) { var i, arr1, arr2; arr1 = element.className.split(" "); arr2 = name.split(" "); for (i = 0; i < arr2.length; i++) { if (arr1.indexOf(arr2[i]) == -1) {element.className += " " + arr2[i];} } } function removeClass(element, name) { var i, arr1, arr2; arr1 = element.className.split(" "); arr2 = name.split(" "); for (i = 0; i < arr2.length; i++) { while (arr1.indexOf(arr2[i]) > -1) { arr1.splice(arr1.indexOf(arr2[i]), 1); } } element.className = arr1.join(" "); } // Add active class to the current button (highlight it) var btnContainer = document.getElementById("collectionBtnContainer"); var btns = btnContainer.getElementsByClassName("year-tab"); for (var i = 0; i < btns.length; i++) { btns[i].addEventListener("click", function(){ var current = document.getElementsByClassName("active"); while (current.length) { current[0].className = current[0].className.replace(" active", ""); } this.className += " active"; }); } </script> <script type="application/javascript"> //calling dfp ADs using Jquery implementation $(document).ready(function () { $.dfp({ dfpID: '8868' }); } ) </script> </div> </div> </div> <div class="experiencefragment aem-GridColumn aem-GridColumn--default--12"> <div class="xf-content-height"> <div class="root responsivegrid"> <div class="aem-Grid aem-Grid--12 aem-Grid--default--12 "> <div class="footer aem-GridColumn aem-GridColumn--default--12"> <script> $(document).ready(function () { $.dfp({ dfpID: '8868', sizeMapping: { 'my-size-mapping': [ { browser: [730, 0], ad_sizes: [[728, 90], [970, 90]] }, { browser: [0, 0], ad_sizes: [320, 50]} ] } }); if (document.documentElement.clientWidth <= 768){ $('#boxAD').removeClass('pull-left'); $('#boxAD').removeClass('pull-right'); $('#boxAD').attr('align', 'center'); $('#vRectAD').removeClass('pull-left'); $('#vRectAD').removeClass('pull-right'); $('#vRectAD').attr('align', 'center'); } }) </script> <footer> <div class="footer-box"> <div class="footer-box-container"> <div class="grid-x grid-padding-x"> <div class="small-12 medium-12 large-3 cell"> <a class="cen-logo-link" href="/"><img src="/content/dam/acs-cen-redesign/logo/cen-logo.png" class="cen-logo" alt="ACS"/></a> </div>  <div class="small-12 medium-4 large-3 cell"> <div class="footer-menu"> <h4 class="footer-title">ABOUT</h4><ul class="vertical menu"> <li class="verticle-menu-item"><a href="https://cen.acs.org/static/about/aboutus.html" class="menu-list">About us</a></li> <li class="verticle-menu-item"><a href="https://acsmediakit.org/" class="menu-list">Advertise</a></li> <li class="verticle-menu-item"><a href="https://cen.acs.org/static/about/contactus.html" class="menu-list">Contact C&EN</a></li> </ul> </div> </div>  <div class="small-12 medium-4 large-3 cell"> <div class="footer-menu"> <h4 class="footer-title">Follow US</h4><ul class="social-link-footer"> <li class="social-list"> <div style="width:200px"> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.facebook.com/CENews" target="_blank" title="Facebook"> <i class="fa fa-facebook social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.instagram.com/cenmag/" target="_blank" title="Instagram"> <i class="fa fa-instagram social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://twitter.com/cenmag" target="_blank" title="X"> <i class="fa fa-twitter social-link-icon"></i> </a> </li> </ul> <ul class="social-link-footer"> <li class="social-list"> <a rel="noopener" class="social-list-link" href="https://www.linkedin.com/showcase/c&en/" target="_blank" title="LinkedIn"> <i class="fa fa-linkedin social-link-icon"></i> </a> </li> </ul> </div> </li></ul> </div> </div>  <div class="small-12 medium-4 large-3 cell"> <div class="footer-menu"> <h4 class="footer-title"><a href="https://www.acs.org/"><img alt="ACS Chemistry for life" src="/content/dam/acs-cen-redesign/logo/acs.png" class="acs-logo" title="ACS: Chemistry for Life(®)"/></a> </h4> <ul class="vertical menu"> <li class="verticle-menu-item"> <a class="menu-list" href="https://cen.acs.org/join-us.html">Join ACS</a> </li> <li class="verticle-menu-item"> <a class="menu-list" href="https://membership.renew.acs.org/membership/renewal/index/">Renew Membership</a> </li> <li class="verticle-menu-item"> <a class="menu-list" href="https://communities.acs.org/">ACS Network</a> </li> </ul> </div> </div> </div> <div class="grid-x grid-padding-x sign-up"> <script src="https://img.en25.com/i/livevalidation_standalone.compressed.js" type="text/javascript"> </script> <div class="large-4 medium-12 small-12 cell text-center text-wrapper"> <p class="signup-text">Sign up for C&EN's must-read weekly newsletter</p> </div> <div class="large-6 medium-10 medium-offset-1 small-12 cell input-wrapper"> <div id="form_output"></div>   <form method="post" name="CENNonMemberSubscriptonWidget2023" onsubmit="setTimeout(function(){if(document.querySelector){var s=document.querySelector('form#form725 input[type=submit]');if(s){s.disabled=true;}}},100);return true;" id="form725" class="elq-form ng-pristine ng-valid search-box"> <div class="input-group"> <input id="elqFormName" value="CENNonMemberSubscriptonWidget2023" type="hidden" name="elqFormName"/> <input id="elqSiteId" value="341921710" type="hidden" name="elqSiteId"/> <input id="elqCampaignId" name="elqCampaignId" type="hidden"/> <input type="hidden" name="hiddenField" id="fe17219" value="hp"/> <input type="hidden" name="hiddenField2" id="fe17220" value="Footer"/> <label for="fe13257" class="label-position top" style="display:none;">Email Address<span class="required">*</span></label> <input type="email" id="fe13257" name="emailAddress" value="" syntax="EmailAddress" placeholder="Email Address" required="yes" class="input-group-field fe13257" style="padding-left:10px;"/> <button class="next input-group-button button" value="Submit" onclick="submit">Subscribe »</button> <span class="checkbox-span field-size-top-medium"> <span> <label class="checkbox-label checkbox-label-homepage newsLetterText"> <small class="checkbox-label-white" style="font-size:70%;">By clicking "Subscribe" you agree to receive C&EN's newsletter and provide permission for American Chemical Society (ACS Publications and C&EN) to email you in accordance with the <a href="https://www.acs.org/content/acs/en/privacy.html" target="_new">ACS Privacy Policy</a>.</small> </label> </span> </span> </div> </form> <script type="text/javascript"> $(document).ready(function () { $('#form725').on('submit', function(e) { e.preventDefault(); var elk = '341921710'; var elkFormName = $('#form725 #elqFormName').val(); var elkSiteID = $('#form725 #elqSiteId').val(); var elkCompainID = $('#form725 #elqCampaignId').val(); var src = $('#form725 #fe17220').val(); var hp = $('#form725 #fe17219').val(); var emailAddress = $('#form725 #fe13257').val(); if(elkFormName!='CENNonMemberSubscriptonWidget2023' || elkSiteID!="341921710" || elkCompainID!="" || src!='Footer' || hp!="hp"){ } else { $('#form725').attr('action','https://s'.concat(elk,'.t.eloqua.com/e/f2')); var elkpth = $('#form725').attr('action'); $.ajax({ url : elkpth || window.location.pathname, type: "GET", async: false, data: $(this).serialize(), success: function (data) { $("#form_output").html("<div class='thank-you'>Thank you for subscribing to the C&EN Weekly Newsletter!</div>"); document.getElementById("form725").reset(); }, error: function (jXHR, textStatus, errorThrown) { alert("This field is required"); } }); } }); }); </script> </div> <script> window.onpageshow = function (event) { if (event.persisted) { location.reload(); } }; </script> </div> </div> </div> <div class="footer-strip"> <div class="grid-x grid-padding-x"> <div class="large-7 medium-12 small-12 cell"> <p class="copyright"> Copyright © 2024 American Chemical Society. All Rights Reserved.</p> </div> <div class="large-5 medium-12 small-12 cell"> <ul class="menu-footer"> <li class="menu-footer-list"><a class="footer-list-item" href="/static/about/help.html">Help</a></li> <li class="menu-footer-list"><a class="footer-list-item" href="https://www.acs.org/content/acs/en/privacy.html">Privacy Policy</a></li> <li class="menu-footer-list"><a class="footer-list-item" href="https://www.acs.org/content/acs/en/terms.html">Terms of Use</a></li> </ul> </div> </div> </div> </footer> </div> </div> </div> </div> </div> </div> </div> </body> </html>

CINXE.COM

C&EN em Português - American Chemical Society