C&EN | Chemistry news from around the world

<!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="/index.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 | Chemistry news from around the world </title> <meta name="google-site-verification" content="cTLP2Ja1JLsfxODZIDMOobGcQm-zwwVM0MvemqIIyTs"/> <meta property="og:title" content="Chemical & Engineering News"/> <meta property="og:site_name" content="Chemical & Engineering News"/> <meta property="og:description" content="Chemical & Engineering News is a weekly news magazine published by the American Chemical Society, providing professional and technical news and analysis in the fields of chemistry and chemical engineering."/> <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/index.html"/> <meta property="og:locale" content="en_US"/> <meta name="twitter:site" content="@cenmag"/> <meta name="twitter:creator" content="@cenmag"/> <meta name="twitter:title" content="Chemical & Engineering News"/> <meta name="twitter:description" content="Chemical & Engineering News is a weekly news magazine published by the American Chemical Society, providing professional and technical news and analysis in the fields of chemistry and chemical engineering."/> <meta name="description" content="Chemical & Engineering News is a weekly news magazine published by the American Chemical Society, providing professional and technical news and analysis in the fields of chemistry and chemical engineering."/> <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_homepage.lc-3b8ce62356b5fad1a20fec9841cc2ff9-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_homepage.lc-183be1b2868d43efdbe703a22cc80622-lc.min.js"></script> <script> var digitalData = { 'pageInfo' : { 'pageName' : 'C\x26EN | Chemistry news from around the world', 'description' : '', 'contentType' : 'Main Landing Pages', 'contentName' : 'Home Page', 'nfc' : '' } }; var _cbq = window._cbq || []; _cbq.push(['_contentType', digitalData.pageInfo.contentType]); _cbq.push(['_contentName', digitalData.pageInfo.contentName]); </script> <script> googletag.cmd.push(function() { //Mapping For Header Leaderboard Only var mapping1 = googletag.sizeMapping() .addSize([0, 0], [[320, 50]]) .addSize([730, 600], [[728, 90]]) .build(); //Adslot 2 declaration try{ gptadslots.push(googletag.defineSlot('/8868/cen/homepage/mainstory_block', [[300,250]], 'div-gpt-21681437156-7') .addService(googletag.pubads()));} catch (error) { console.log(error);} //Adslot 3 declaration try{ gptadslots.push(googletag.defineSlot('/8868/cen/homepage/below_mostpopular_block', [[728,90],[970,90]], 'div-gpt-21681437147-3') .defineSizeMapping(mapping1) .addService(googletag.pubads()));} catch (error) { console.log(error);} //Adslot 4 declaration try{ gptadslots.push(googletag.defineSlot('/8868/cen/homepage/above_careersblock', [[728,90],[970,90]], 'div-gpt-21681437150-4') .defineSizeMapping(mapping1) .addService(googletag.pubads()));} catch (error) { console.log(error);} // Header Reveal Ad try{ gptadslots.push(googletag.defineSlot('/8868/cen', [1,1], 'div-gpt-ad-8773544-1') .setTargeting('pos', ['interstitial']) .addService(googletag.pubads()));} catch (error) { console.log(error);} googletag.pubads().enableSingleRequest(); googletag.enableServices(); }); </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-fa2f81fa0a" 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/102/10236.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/102/10236.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/102/10236.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/102/10236.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="htmlComponent aem-GridColumn aem-GridColumn--default--8"> <style> .xf-content-height { min-height: 0px; } .moretopics-holder { margin-top: 0rem !important; } div.cover-feature-story.home-top-module-section.large-12.small-12.medium-12.cell { padding: 0px !important; } div.cover-feature-story.home-top-module-section.large-12.small-12.medium-12.cell div.featured-wrap { background-color: #eaf8fc; } </style> </div> <div class="flexibleTopModule aem-GridColumn aem-GridColumn--default--8"> <div class="moreTopics aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container ctm-grid-container"> <div class="moretopics-holder clearfix"> <div class="grid-x grid-padding-x ctm-grid-padding-x" data-equalizer="krrwx2-equalizer" data-equalize-on="medium" data-resize="2nmq91-eq" data-mutate="vhm7xc-eq" data-events="mutate"> <div class="cover-feature-story home-top-module-section large-12 small-12 medium-12 cell" style="padding: .9375rem;"> <div class="top-feature bottom-feature"> <div class="grid-x"> <div class="left-block featured-wrap-section large-12 medium-12 small-12 cell"> <div class="featured-wrap"> <div class="featured-block-img-caption" style="max-height: fit-content;"> </div> <div class="featured-img-desc" style="padding: 0;"> <h3 class="featured-title"> <a href="/#" class="title"></a> </h3> <p class="featured-desc"><p style=" text-align: center; "><b>Cyber Savings Season: <a title="Cyber Savings Season: Join ACS today and unlock unlimited C&EN access. Save 30% on membership with code CYBER24 through Dec. 11. " href="https://connect.discoveracs.org/CEN-ACS-membership-offer?sc=241111_btn_acq_join_cen_cybersavings" target="_blank" rel="noopener noreferrer">Join ACS today</a> and unlock unlimited C&EN access. Save 30% on membership with code CYBER24 through Dec. 11.</b></p></p> </div> </div> </div> </div> </div> </div> </div> </div> </div> </div></div> <div class="homeTopModule_v2 aem-GridColumn aem-GridColumn--default--8"> <div class="cq-placeholder cq-marker-start" data-emptytext="Top Module V2"></div> <div class="grid-container"> <div class="gray-holder"> <div class="grid-x grid-padding-x"> <div class="cover-feature-story home-top-module-section large-8 small-12 medium-12 cell">  <div class="top-feature bottom-feature"> <div class="grid-x"> <div class="left-block featured-wrap-section large-12 medium-12 small-12 cell"> <div class="featured-wrap"> <div class="featured-block-img-caption">  <div class="featured-img"> <a class="img-section" href="/business/instrumentation/tariffs-raise-price-lab-instruments/102/web/2024/11"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=710&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=700&qlt=90,0&resMode=sharp2"/> <img class="img-responsive lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=750&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp3-pricetag?$responsive$&wid=750&qlt=90,0&resMode=sharp2"/> </picture> </a> </div>  <span class="img-caption"> <a class="caption" href="/topics/business.html#instrumentation"> Instrumentation </a> </span> </div> <div class="featured-img-desc"> <h3 class="featured-title"> <a class="title" href="/business/instrumentation/tariffs-raise-price-lab-instruments/102/web/2024/11">Will tariffs raise the price of lab instruments? </a> </h3> <p class="featured-desc"> Policy changes might affect equipment prices and lab budgets in the US. Here’s what economists and industry analysts are watching </p> </div> </div> </div> </div> </div>  <div class="top-bottom-division clearfix"></div> <div class="bottom-feature top-module-bottom-section" data-equalizer data-equalize-on-stack="true"> <div class="grid-x">  <div class="left-block featured-wrap-section large-6 medium-12 small-12 cell"> <div class="featured-wrap" data-equalizer-watch> <div class="featured-block-img-caption">   <div class="featured-img"> <a class="img-section" href="/environment/water/Mystery-chemical-drinking-water-identified/102/i37"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=700&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="img-responsive lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=370&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon1-water?$responsive$&wid=370&qlt=90,0&resMode=sharp2"/> </picture> </a> </div>  <span class="img-caption"> <a class="caption" href="/topics/environment.html#water"> Water </a> </span> </div> <div class="featured-img-desc"> <h3 class="featured-title"> <a class="title" href="/environment/water/Mystery-chemical-drinking-water-identified/102/i37">Mystery chemical in drinking water identified </a> </h3> <p class="featured-desc"> Scientists find chloronitramide anions form in water treated with chloramines, raising questions about the ions’ toxicity </p> </div> </div> </div>  <div class="right-block featured-wrap-section large-6 medium-12 small-12 cell"> <div class="featured-wrap" data-equalizer-watch> <div class="featured-block-img-caption">   <div class="featured-img"> <a class="img-section" href="/physical-chemistry/astrochemistry/Starlight-another-galaxy/102/i37"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=700&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="img-responsive lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=370&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10237-scicon4-star-social?$responsive$&wid=370&qlt=90,0&resMode=sharp2"/> </picture> </a> </div>  <span class="img-caption"> <a class="caption" href="/topics/physical-chemistry.html#astrochemistry"> Astrochemistry </a> </span> </div> <div class="featured-img-desc"> <h3 class="featured-title"> <a class="title" href="/physical-chemistry/astrochemistry/Starlight-another-galaxy/102/i37">Starlight from another galaxy </a> </h3> <p class="featured-desc"> Researchers capture the first zoomed-in image of a star beyond the Milky Way </p> </div> </div> </div> </div>  </div>  </div>  <div class="large-4 medium-12 small-12 cell top-module-right-section"> <div class="magazine-issue-right-col"> <ul class="featured-article-right"> <li class="article-list-item"> <div class="tag"> <a href="/topics/environment.html#climateChange" class="tag-link"> Climate Change </a> </div> <h4 class="article-list-title"> <a href="/environment/climate-change/reporters-notebook-COP29-big-climate/102/web/2024/11" class="article-title-link"> A reporter’s notebook from COP29, the big climate conference </a> </h4> <p class="article-list-para">Lower-income countries say ‘show me the money’ at this year’s conclave in Azerbaijan </p> </li> <li class="article-list-item"> <div class="tag"> <a href="/topics/environment.html#water" class="tag-link"> Water </a> </div> <h4 class="article-list-title"> <a href="/environment/water/ARPA-E-fund-chemical-capture/102/web/2024/11" class="article-title-link"> ARPA-E to fund chemical capture from wastewater </a> </h4> <p class="article-list-para">RECOVER program aims to deploy $36 million by September 2025 </p> <li class="home-nested-ads article-list-item"> <div class="home-nested-ads-section"> <div> <div class="aem-Grid aem-Grid--12 aem-Grid--default--12 "> <div class="genericAdsAdvanced aem-GridColumn aem-GridColumn--default--12"> <div class="article-small-ads landing-page-ads landingads-noborder"> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> <div class="adunit" data-adunit="cen" data-dimensions="300x250" data-targeting='{"Topic":",,,,,","Collection":"","Keyword":""}'></div> </div> </div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--12"> </div> </div> </div> </div> </li> <li class="article-list-item"> <div class="tag"> <a href="/topics/pharmaceuticals.html#drugDelivery" class="tag-link"> Drug Delivery </a> </div> <h4 class="article-list-title"> <a href="/pharmaceuticals/drug-delivery/Engineered-yeast-deliver-colorectal-cancer/102/i37" class="article-title-link"> Engineered yeast deliver colorectal cancer immunotherapy </a> </h4> <p class="article-list-para">Immune checkpoint inhibitor–secreting yeast reduced tumor count in mice </p> </li> <li class="article-list-item sponsored-content-top-module-homepage" id="nativo-homepage-1"> <div class="tag"> <a href="#" class="tag-link sponsored"> Sponsored Content </a> </div> <h4 class="article-list-title"> <a href="#" class="article-title-link"></a> </h4> <p class="article-list-para"></p> </li> </ul> </div> </div>  <div class="clearfix"></div> <div class="more-stories-section"> <a class="button expanded"> <i class="fa fa-angle-double-right" aria-hidden="true"></i> </a> </div> </div>  </div>  </div> </div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--8"> <div class="clear"></div> </div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--8"> </div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--8"> <style> .most-recent h3 { border-bottom: none !important; box-shadow: none !important; } </style> </div> <div class="mostRecent-module aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container"> <div class="most-recent"> <div class="grid-x grid-padding-x ctm-grid-padding-x"> <div class="large-12 medium-12 small-12 cell"> <div class="large-2 medium-2 small-2 cell"> <h2 class="most-recent-label"><a href="/most-recent.html" class="most-recent-label-link">Most Recent</a> <a href="https://cen.acs.org/feeds/rss/latestnews.xml" target="_blank"><i class="fa fa-rss"></i></a></h2> </div> </div> </div> <div class="grid-x grid-padding-x ctm-grid-padding-x"> <div class="large-8 medium-7 small-12 cell"> <div class="feedburnerFeedBlock" id="CEN-LN-Internal4pskjljd6mjrjl0qp23a5dhk70"> <ul> <li><span class="headline"><a href="https://cen.acs.org/pharmaceuticals/drug-delivery/Microjet-devices-help-replace-needle/102/web/2024/11?sc=230901_cenrssfeed_eng_latestnewsrss_cen">‘Microjet’ devices could help replace needle injections </a></span></li> <li><span class="headline"><a href="https://cen.acs.org/education/outreach/Lego-look-alike-chemists-wine/102/i37?sc=230901_cenrssfeed_eng_latestnewsrss_cen">A Lego look-alike and a chemist’s wine pastime </a></span></li> <li><span class="headline"><a href="https://cen.acs.org/environment/climate-change/reporters-notebook-COP29-big-climate/102/web/2024/11?sc=230901_cenrssfeed_eng_latestnewsrss_cen">A reporter’s notebook from COP29, the big climate conference </a></span></li> <li><span class="headline"><a href="https://cen.acs.org/business/instrumentation/tariffs-raise-price-lab-instruments/102/web/2024/11?sc=230901_cenrssfeed_eng_latestnewsrss_cen">Will tariffs raise the price of lab instruments? </a></span></li> <li><span class="headline"><a href="https://cen.acs.org/physical-chemistry/astrochemistry/Starlight-another-galaxy/102/i37?sc=230901_cenrssfeed_eng_latestnewsrss_cen">Starlight from another galaxy </a></span></li> </ul> </div> <noscript><p>headline updates from: <a href="/static/about/rss_feeds.html">Subscribe to Most Recent RSS feed</a></p> </noscript> </div> <div class="large-4 medium-5 small-12"> <div class="newsLetter section"> <script src="https://img.en25.com/i/livevalidation_standalone.compressed.js" type="text/javascript"></script> <div class="article-newsletter"> <p class="newsletter-desc">Sign up for C&EN's must-read weekly newsletter</p> <div id="form_output1"></div> <div class="input-group">   <form method="post" name="CENNonMemberSubscriptonWidget2023" onsubmit="setTimeout(function(){if(document.querySelector){var s=document.querySelector('form#form7255 input[type=submit]');if(s){s.disabled=true;}}},100);return true;" id="form7255" class="elq-form ng-pristine ng-valid newsletter-form"> <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="HBody"/> <div class="input-wrap email-wrap-left"> <label for="fe13257" class="label-position top" style="display:none;">Email Address<span class="required">*</span></label> <input type="email" id="fe13257" syntax="EmailAddress" name="emailAddress" value="" placeholder="Email Address" required="yes" class="field-size-top-large input-email fe13257" style="padding-left:10px;"/> </div> <div class="submit-form submit-wrap-right"> <button class="next input-group-button button" value="Submit" onclick="submit">Subscribe »</button> </div> <div> <p class="field-p"> <span class="checkbox-span field-size-top-medium"> <span> <label class="checkbox-label"> <small><a href="mailto:cen-newsletters@acs.org">Contact us</a> to opt out anytime</small> </label> </span> </span> </p> </div> </form> <script type="text/javascript"> $(document).ready(function () { $('#form7255').on('submit', function(e) { e.preventDefault(); var elk = '341921710'; var elkFormName = $('#form7255 #elqFormName').val(); var elkSiteID = $('#form7255 #elqSiteId').val(); var elkCompainID = $('#form7255 #elqCampaignId').val(); var src = $('#form7255 #fe17220').val(); var hp = $('#form7255 #fe17219').val(); var emailAddress = $('#form7255 #fe13257').val(); if(elkFormName!='CENNonMemberSubscriptonWidget2023' || elkSiteID!="341921710" || elkCompainID!="" || src!='HBody' || hp!='hp'){ } else{ $('#form7255').attr('action','https://s'.concat(elk,'.t.eloqua.com/e/f2')); var elkpth = $('#form7255').attr('action'); $.ajax({ url : elkpth || window.location.pathname, type: "GET", async: false, data: $(this).serialize(), success: function (data) { $("#form_output1").html("<div class='thank-you'>Thank you for subscribing to the C&EN Weekly Newsletter!</div>"); document.getElementById("form7255").reset(); }, error: function (jXHR, textStatus, errorThrown) { alert("This field is required"); } }); } }); }); </script> </div> </div> <script> window.onpageshow = function (event) { if (event.persisted) { location.reload(); } }; </script> </div> </div> </div> <div class="grid-x grid-padding-x"> <div class="all-stories-section"> <a class="button expanded" href="/most-recent.html"> All recent stories <i class="fa fa-angle-double-right" aria-hidden="true"></i> </a> </div> </div> </div> </div></div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--8"> </div> <div class="mostPopular aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container ctm-grid-container"> <div class="most-popular"> <div class="grid-x grid-padding-x ctm-grid-padding-x" data-equalizer data-equalize-on="medium"> <div class="large-12 medium-12 small-12 cell"> <div class="large-2 medium-2 small-2 cell"> <h2 class="popular-label"><a href="/most-recent.html" class="popular-label-link"> Most popular </a></h2> </div> </div> <div class="large-4 medium-12 small-12 cell"> <div class="most-popular-box" data-equalizer-watch> <figure class="most-popular-image"> <a href="/physical-chemistry/geochemistry/Naicas-crystal-cave-captivates-chemists/97/i6?sc=231026_mostread_eng_cen" class="most-popular-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=410&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="popular-image lazy lazy-image" data-src="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=360&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/09706-feature1-cave?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> </picture> </a> <figcaption class="popular-tag"> <a href="/topics/physical-chemistry.html#geochemistry" class="popular-tag-link">Geochemistry</a> </figcaption> </figure> <div class="most-popular-content"> <h3 class="most-popular-title"> <a href="/physical-chemistry/geochemistry/Naicas-crystal-cave-captivates-chemists/97/i6?sc=231026_mostread_eng_cen" class="title-link">Naica’s crystal cave captivates chemists</a> </h3> <p class="most-popular-description">Giant gypsum crystals reveal their secrets</p> </div> </div> </div> <div class="large-4 medium-12 small-12 cell"> <div class="most-popular-box" data-equalizer-watch> <figure class="most-popular-image"> <a href="/business/start-ups/Cashing-founder-led-biotech/102/i36?sc=231026_mostread_eng_cen" class="most-popular-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=410&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="popular-image lazy lazy-image" data-src="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> </picture> </a> <figcaption class="popular-tag"> <a href="/topics/business.html#startUps" class="popular-tag-link">Start-ups</a> </figcaption> </figure> <div class="most-popular-content"> <h3 class="most-popular-title"> <a href="/business/start-ups/Cashing-founder-led-biotech/102/i36?sc=231026_mostread_eng_cen" class="title-link">Cashing in on founder-led biotech </a> </h3> <p class="most-popular-description">Scientists who want a say in the future of their inventions are once again moving from academia to the C-suite </p> </div> </div> </div> <div class="large-4 medium-12 small-12 cell"> <div class="most-popular-article-holder" data-equalizer-watch> <article class="most-popular-article"> <div class="most-popular-tag"> <a href="/topics/biological-chemistry.html#biotechnology" class="tag-link">Biotechnology</a> </div> <h3 class="most-popular-title"> <a href="/biological-chemistry/biotechnology/Future-proofing-photosynthesis/102/i36?sc=231026_mostread_eng_cen" class="title-link">Future proofing photosynthesis </a> </h3> <p class="most-popular-description"> How biochemists are tinkering with the fundamental reactions in plants to improve crop yields </p> </article> <hr class="divider"/> <article class="most-popular-article"> <div class="most-popular-tag"> <a href="/topics/environment.html#recycling" class="tag-link">Recycling</a> </div> <h3 class="most-popular-title"> <a href="/environment/recycling/companies-recycle-wind-turbine-blades/100/i27?sc=231026_mostread_eng_cen" class="title-link">How can companies recycle wind turbine blades?</a> </h3> <p class="most-popular-description"> Landfilling retired blades isn’t green or sustainable. Companies are working on ways to reuse the giant structures rather than bury them </p> </article> <hr class="divider"/> <article class="most-popular-article"> <div class="most-popular-tag"> <a href="/topics/materials.html#energyStorage" class="tag-link">Energy Storage</a> </div> <h3 class="most-popular-title"> <a href="/articles/88/i4/Hand-Warmers.html?sc=231026_mostread_eng_cen" class="title-link">What’s inside disposable hand warmers?</a> </h3> <p class="most-popular-description"> Small packets of warmth work through a simple exothermic reaction </p> </article> </div> </div> </div> </div> </div> </div> <div class="genericAds aem-GridColumn aem-GridColumn--default--8"> <div class="article-small-ads"> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> <div class=" landing-page-ads landingads-noborder" id="div-gpt-21681437147-3"> <script> googletag.cmd.push(function() { googletag.display('div-gpt-21681437147-3'); }); </script> </div> </div> <script> $(".article-small-ads > h6").css("margin-bottom","0rem"); </script></div> <div class="collection parbase aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container ctm-grid-container"> <div class="clearfix" data-equalizer data-equalize-on="small">  </div> </div> <div class="grid-container ctm-grid-container"> <div class="clearfix" data-equalizer data-equalize-on="small"> <div class="collection-component clearfix"> <div class="sub-feature-col"> <h4 class="sub-heading"> <div class="sub-heading-link">Newscripts</div> </h4> <div class="item-container"> <div class="item-wrap"> <div class="item-img"> <a class="item-img-link" href="/education/outreach/Lego-look-alike-chemists-wine/102/i37"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="item-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=370&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10237-newscripts-sequencer-social?$responsive$&wid=370&qlt=90,0&resMode=sharp2"/> </picture> </a> </div> <span class="tag"> <a class="tag-link" href="/topics/education.html#outreach">Outreach</a> </span> <div class="item-text"> <h3 class="item-text-heading"> <a class="item-text-link" href="/education/outreach/Lego-look-alike-chemists-wine/102/i37">A Lego look-alike and a chemist’s wine pastime </a> </h3> <p class="item-description"></p> </div> </div> </div> </div> <div class="sub-feature-col"> <h4 class="sub-heading"> <div class="sub-heading-link">Newscripts</div> </h4> <div class="item-container"> <div class="item-wrap"> <div class="item-img"> <a class="item-img-link" href="/biological-chemistry/biochemistry/chemistry-sunken-artifacts/102/i36"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="item-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=370&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10236-newscripts-ship?$responsive$&wid=370&qlt=90,0&resMode=sharp2"/> </picture> </a> </div> <span class="tag"> <a class="tag-link" href="/topics/biological-chemistry.html#biochemistry">Biochemistry</a> </span> <div class="item-text"> <h3 class="item-text-heading"> <a class="item-text-link" href="/biological-chemistry/biochemistry/chemistry-sunken-artifacts/102/i36">The chemistry of sunken artifacts </a> </h3> <p class="item-description"></p> </div> </div> </div> </div> <div class="sub-feature-col sponsored-content" id="nativo-homepage-2"> <h4 class="article-list-title"> <a href="#" class="article-title-link"></a> </h4> <p class="article-list-para"></p> </div> </div>  </div> </div> </div> <div class="magazine-module aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container"> <div class="magazine-border"> <div class="grid-x grid-padding-x"> <div class="large-12 medium-12 small-12 cell"> <div class="grid-x"> <div class="large-3 medium-3 small-5"> <div class="magazine-module-title"> <a href="/magazine/102/10236.html" class="module-title-link"> Magazine </a> </div> </div> </div> </div> <div class="large-12 medium-12 small-12 cell"> <div class="grid-x"> <div class="large-3 medium-12 small-12 cell"> <div class="magazine-image-wrapper"> <a href="/magazine/102/10236.html" class="magazine-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=190&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=410&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=450&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img data-src="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=180&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10236-ofc-1?$responsive$&wid=180&qlt=90,0&resMode=sharp2" alt="image info" class="magazine-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg"/> </picture> </a> </div> </div> <div class="large-9 medium-12 small-12 cell"> <div class="magazine-info-box"> <h4 class="magazine-text">Your November 18, 2024 Issue</h4> <ul class="magazine-article-list"> <li class="article-list-item"> <a href="/biological-chemistry/biotechnology/Future-proofing-photosynthesis/102/i36" class="article-link"> Future proofing photosynthesis </a> </li> <li class="article-list-item"> <a href="/business/start-ups/Cashing-founder-led-biotech/102/i36" class="article-link"> Cashing in on founder-led biotech </a> </li> <li class="article-list-item"> <a href="/materials/Totally-rad-Radiative-materials-redefine/102/i36" class="article-link"> Totally rad: Radiative materials redefine cool clothes for a hotter world </a> </li> <li class="article-list-item"> <a href="/education/Europe-running-chemistry-teachers/102/i36" class="article-link"> Is Europe running out of chemistry teachers? </a> </li> </ul> <h4 class="magazine-text"> <a href="/magazine/102/10236.html" class="magazine-link"> More From The Issue </a> <a href="/magazine/all-issue.html" class="magazine-link"> Past Issues </a> </h4> </div> </div> </div> </div> </div> </div> </div> </div> <div class="genericAds aem-GridColumn aem-GridColumn--default--8"> <div class="article-small-ads"> <h6 class="small-ads-title text-center">ADVERTISEMENT</h6> <div class=" landing-page-ads landingads-noborder" id="div-gpt-21681437150-4"> <script> googletag.cmd.push(function() { googletag.display('div-gpt-21681437150-4'); }); </script> </div> </div> <script> $(".article-small-ads > h6").css("margin-bottom","0rem"); </script></div> <div class="career-module aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container ctm-grid-container"> <div class="career-holder"> <div class="grid-x grid-padding-x ctm-grid-padding-x" data-equalizer data-equalize-on="small"> <div class="medium-12 large-12 small-12 cell"> <div class="moretopic-cont"> <div class="moretopic-label"> <a href="/topics/careers.html" class="moretopic-label-link">Careers</a> </div> </div> </div> <div class="medium-12 large-8 small-12 career-block"> <div class="medium-6 large-6 small-12 cell cell-block-left cel-col-1"> <div class="moretopic-cont"> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <div class="moretopic-image-link"> <a href="/careers/career-tips/prepare-panel/102/i36"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=410&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10236-careertips-panel-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2" alt="image name"/> </picture> </a> </div> <figcaption class="moretopic-tag"> <a href="/topics/careers.html#careerTips" class="moretopic-tag-link">Career Tips</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/careers/career-tips/prepare-panel/102/i36" class="moretopic-title-link">How to prepare for a panel </a> </h3> <p class="moretopic-top-para"></p> </div> </div> </div> <hr class="divider"/> </div> <div class="medium-6 large-6 small-12 cell cell-block-left cell-right"> <div class="moretopic-cont"> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <div class="moretopic-image-link"> <a href="/business/start-ups/Cashing-founder-led-biotech/102/i36"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=410&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10236-feature1-subway-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2" alt="image name"/> </picture> </a> </div> <figcaption class="moretopic-tag"> <a href="/topics/business.html#startUps" class="moretopic-tag-link">Start-ups</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/business/start-ups/Cashing-founder-led-biotech/102/i36" class="moretopic-title-link">Cashing in on founder-led biotech </a> </h3> <p class="moretopic-top-para">Scientists who want a say in the future of their inventions are once again moving from academia to the C-suite </p> </div> </div>  </div> <hr class="divider"/> </div> <hr class="hide-hr"/> <div class="medium-6 large-6 small-12 cell cell-block-left cel-col-1"> <div class="moretopic-bottom-box" data-match-height="groupName"> <div class="moretopic-bottom-tag"> <a href="/topics/careers.html#diversity" class="moretopic-bottom-tag-link">Diversity</a> </div> <h3 class="moretopic-bottom-title"> <a href="/careers/diversity/Reactions-Response-Trailblazers-2024-praise/102/i36" class="moretopic-bottom-title-link">Reactions: Response to Trailblazers 2024, praise for C&EN, and reflections on chemistry education </a> </h3> <p class="moretopic-bottom-para"></p> </div> <hr class="divider show-mobile"/> </div> <div class="medium-6 large-6 small-12 cell cell-block-left cell-right"> <div id="nativo-homepage-3" class="sponsored-48"> </div> <hr class="divider show-mobile"/> </div> </div> <div class="medium-12 large-4 small-12 cell"> <div class="news-list-holder"> <h4 class="job-title text-center">Job Listings</h4> <ul class="job-list"> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40763/assistant-professor-position-tenure-track-in-organic-chemistry-or-organometallic-chemistry/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> University of Saskatchewan - Department of Chemistry: Assistant professor position (tenure-track ) in organic chemistry or organometallic chemistry</a> </li> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40983/organic-chemistry-lecturer/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> University of North Carolina Greensboro: Organic Chemistry Lecturer</a> </li> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40984/assistant-professor-organic-chemistry/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> Oklahoma State University: Assistant Professor - Organic Chemistry</a> </li> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40987/university-of-miami-faculty-positions-in-quantum-science/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> University of Miami, Department of Physics: University of Miami Faculty Positions in Quantum Science</a> </li> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40993/open-faculty-positions-in-college-of-chemical-and-biological-engineering-zhejiang-university/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> Zhejiang University: Open Faculty Positions in College of Chemical and Biological Engineering Zhejiang University</a> </li> <li class="job-list-item"> <a rel="noopener" href="https://chemistryjobs.acs.org/job/40998/postdoctoral-research-associate-research-chemist-/?TrackID=16180&utm_source=Recruitics&utm_medium=Feed&utm_campaign=2024-11-22" class="job-list-link"> USDA ARS Eastern Regional Research Center: Postdoctoral Research Associate (Research Chemist)</a> </li> </ul> <div class="view-all-jobs text-right"> <a rel="noopener" href="http://chemistryjobs.acs.org/" class="view-all-jobs-link"> <span class="visit"> visit </span> <span class="cen"> <img src="/content/dam/acs-cen-redesign/logo/CEN_Jobs_RedGrey.png" class="cen-job-img"/> </span> <i class="fa fa-chevron-right" aria-hidden="true"></i> </a> </div> </div> </div> </div> </div> </div> </div> <div class="moreTopics aem-GridColumn aem-GridColumn--default--8"> <div class="grid-container ctm-grid-container"> <div class="moretopics-holder clearfix"> <div class="grid-x grid-padding-x ctm-grid-padding-x" data-equalizer data-equalize-on="medium"> <div class="cell medium-12 small-12 large-4"> <div class="moretopic-cont"> <div class="moretopic-label"> <a href="/topics/policy.html" class="moretopic-label-link">Policy</a> </div> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <a href="/environment/climate-change/reporters-notebook-COP29-big-climate/102/web/2024/11" class="moretopic-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=360&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20241122lnp4-cop29?$responsive$&wid=360&qlt=90,0&resMode=sharp2" alt="image name"/> </picture> </a> <figcaption class="moretopic-tag"> <a href="/topics/environment.html#climateChange" class="moretopic-tag-link">Climate Change</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/environment/climate-change/reporters-notebook-COP29-big-climate/102/web/2024/11" class="moretopic-title-link">A reporter’s notebook from COP29, the big climate conference </a> </h3> <p class="moretopic-top-para">Lower-income countries say ‘show me the money’ at this year’s conclave in Azerbaijan </p> </div> </div>  <hr class="divider"/> <div class="moretopic-bottom-box" data-match-height="groupName"> <div class="moretopic-bottom-tag"> <a href="/topics/business.html#instrumentation" class="moretopic-bottom-tag-link">Instrumentation</a> </div> <h3 class="moretopic-bottom-title"> <a href="/business/instrumentation/tariffs-raise-price-lab-instruments/102/web/2024/11" class="moretopic-bottom-title-link">Will tariffs raise the price of lab instruments? </a> </h3> <p class="moretopic-bottom-para">Policy changes might affect equipment prices and lab budgets in the US. Here’s what economists and industry analysts are watching </p> </div> </div>  </div> <div class="cell medium-12 small-12 large-4"> <div class="moretopic-cont"> <div class="moretopic-label"> <a href="/topics/biological-chemistry.html" class="moretopic-label-link">Biological Chemistry</a> </div> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <a href="/food/agriculture/Noninsecticidal-agrochemicals-alter-insect-behavior/102/i34" class="moretopic-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/10234-scicon6-fly-social?$responsive$&wid=360&qlt=90,0&resMode=sharp2" alt="image name"/> </picture> </a> <figcaption class="moretopic-tag"> <a href="/topics/food.html#agriculture" class="moretopic-tag-link">Agriculture</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/food/agriculture/Noninsecticidal-agrochemicals-alter-insect-behavior/102/i34" class="moretopic-title-link">Noninsecticidal agrochemicals alter insect behavior </a> </h3> <p class="moretopic-top-para">Many noninsecticidal chemicals used in agriculture could contribute to insect population declines </p> </div> </div>  <hr class="divider"/> <div class="moretopic-bottom-box" data-match-height="groupName"> <div class="moretopic-bottom-tag"> <a href="/topics/biological-chemistry.html#toxicology" class="moretopic-bottom-tag-link">Toxicology</a> </div> <h3 class="moretopic-bottom-title"> <a href="/biological-chemistry/toxicology/Toxic-food-packaging-chemicals-found/102/i30" class="moretopic-bottom-title-link">Toxic food packaging chemicals found in humans </a> </h3> <p class="moretopic-bottom-para">Mammary carcinogens found in food packaging are also found in human blood samples </p> </div> </div>  </div> <div class="cell medium-12 small-12 large-4"> <div class="moretopic-cont"> <div class="moretopic-label"> <a href="/topics/synthesis.html" class="moretopic-label-link">Synthesis</a> </div> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <a href="/environment/persistent-pollutants/New-techniques-use-visible-light/102/web/2024/11" class="moretopic-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" data-src="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=360&qlt=90,0&resMode=sharp2" data-srcset="https://s7d1.scene7.com/is/image/CENODS/20241120lnp1-pfoa-1?$responsive$&wid=360&qlt=90,0&resMode=sharp2" alt="image name"/> </picture> </a> <figcaption class="moretopic-tag"> <a href="/topics/environment.html#persistentPollutants" class="moretopic-tag-link">Persistent Pollutants</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/environment/persistent-pollutants/New-techniques-use-visible-light/102/web/2024/11" class="moretopic-title-link">New techniques use visible light to destroy PFAS </a> </h3> <p class="moretopic-top-para">Novel light-activated catalysts tear apart carbon-fluorine bonds in the forever chemicals </p> </div> </div>  <hr class="divider"/> <div class="moretopic-bottom-box" data-match-height="groupName"> <div class="moretopic-bottom-tag"> <a href="/topics/synthesis.html" class="moretopic-bottom-tag-link">Synthesis</a> </div> <h3 class="moretopic-bottom-title"> <a href="https://cen.acs.org/synthesis/AI-powered-lab-partner/102/web/2024/11" class="moretopic-bottom-title-link">An AI-powered lab partner </a> </h3> <p class="moretopic-bottom-para">Synthesis robot can run reactions, analyze data, and make decisions </p> </div> </div>  </div> </div> </div> </div> </div> <div class="genericAds aem-GridColumn aem-GridColumn--default--8"> <script> $(".article-small-ads > h6").css("margin-bottom","0rem"); </script></div> <div class="genericAds aem-GridColumn aem-GridColumn--default--8"> <script> $(".article-small-ads > h6").css("margin-bottom","0rem"); </script></div> <div class="htmlComponent aem-GridColumn aem-GridColumn--default--8"> </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 | Chemistry news from around the world