C&EN | Chemistry news from around the world

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name"/> </picture> </a> <figcaption class="moretopic-tag"> <a href="/web/20240501173201/https://cen.acs.org/topics/synthesis.html" class="moretopic-tag-link">Synthesis</a> </figcaption> </figure> <div class="moretopic-top-content"> <h3 class="moretopic-top-title"> <a href="/web/20240501173201/https://cen.acs.org/synthesis/Tobacco-cutworms-insert-oxygen-nanocarbon/102/web/2024/04" class="moretopic-title-link">Tobacco cutworms insert oxygen into nanocarbon hoops and rings </a> </h3> <p class="moretopic-top-para">Larvae perform a chemical transformation that would be challenging to do in a reaction flask </p> </div> </div>  <hr class="divider"/> <div class="moretopic-bottom-box" data-match-height="groupName"> <div class="moretopic-bottom-tag"> <a href="/web/20240501173201/https://cen.acs.org/topics/biological-chemistry.html#infectiousDisease" class="moretopic-bottom-tag-link">Infectious disease</a> </div> <h3 class="moretopic-bottom-title"> <a 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Public health officials say the risks for humans remain low </p> </div> </div>  </div> <div class="cell medium-12 small-12 large-4"> <div class="moretopic-cont"> <div class="moretopic-label"> <a href="/web/20240501173201/https://cen.acs.org/topics/environment.html" class="moretopic-label-link">Environment</a> </div> <div class="moretopic-top-box" data-equalizer-watch> <figure class="moretopic-top-image"> <a href="/web/20240501173201/https://cen.acs.org/environment/Periodic-Graphics-chemistry-hydrangea-color/102/i13" class="moretopic-image-link"> <picture> <source media="(max-width: 480px)" srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10213-feature4-graphic?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10213-feature4-graphic?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" 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srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10212-scicon6-drop-video?$responsive$&wid=375&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 768px)" srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10212-scicon6-drop-video?$responsive$&wid=740&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 992px)" srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10212-scicon6-drop-video?$responsive$&wid=840&qlt=90,0&resMode=sharp2"/> <source media="(max-width: 1200px)" srcset="https://web.archive.org/web/20240501173201im_/https://s7d1.scene7.com/is/image/CENODS/10212-scicon6-drop-video?$responsive$&wid=340&qlt=90,0&resMode=sharp2"/> <img class="moretopic-image lazy lazy-image" src="/web/20240501173201im_/https://cen.acs.org/content/dam/cen/static/images/dev/thumbnail-profiles/placeholder.jpg" 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