Catálogo de publicaciones - revistas

<jats:title>Metabolic syndrome, leaky guts, and infection</jats:title> <jats:p> Metabolic syndrome often accompanies obesity and hyperglycemia and is associated with a breakdown in the integrity of the intestinal barrier and increased risk of systemic infection. Thaiss <jats:italic>et al.</jats:italic> found that mice with systemic infection of a <jats:italic>Salmonella</jats:italic> analog, <jats:italic>Citrobacter rodentium</jats:italic> , also exhibited hyperglycemia. Deletion of the glucose transporter GLUT2 altered sensitivity to chemically induced epithelial permeability and protected mice from pathogen invasion. The authors also found a correlation in humans between glycated hemoglobin (an indicator of hyperglycemia) and serum levels of pathogen recognition receptor ligands. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1376" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar3318">1376</jats:related-article> </jats:p>

<jats:title>Silicon clears a wet path to phosphines</jats:title> <jats:p>Phosphoric acid is produced on a massive scale for fertilizer by treating phosphate rock with sulfuric acid. In contrast, preparation of more elaborate phosphorus compounds used in chemical catalysis, pharmaceutical, and battery applications requires laborious generation and chlorination of elemental phosphorus. Geeson and Cummins now show that phosphoric acid may also be a practical source of such compounds (see the Perspective by Protasiewicz). They isolated and characterized a phosphide salt derived from treatment of dehydrated phosphoric acid with trichlorosilane, a compound already used at the commercial scale to produce high-purity silicon. The salt proved to be a versatile precursor for a range of alkylated and fluorinated phosphorus compounds.</jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1383" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aar6620">1383</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1333" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aat1206">1333</jats:related-article> </jats:p>

<jats:title>More than just simple folding</jats:title> <jats:p> Origami involves folding two-dimensional sheets into complex three-dimensional objects. However, some shapes cannot be created using standard folds. Faber <jats:italic>et al.</jats:italic> studied the wing of an earwig, which can fold in ways not possible using origami and can alter its shape for flight. The authors replicated this ability by using a membrane that allows for deformations and variable stiffness. Prestretching generated energetically bistable origami patterns that exhibited passive self-folding behavior. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1386" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aap7753">1386</jats:related-article> </jats:p>

<jats:title>Moving charges with radicals</jats:title> <jats:p> Conducting polymers usually contain backbones with multiple bonds. After chemical doping to remove some of the electrons, charge carriers can move freely. These conjugated backbones can also make the polymers rigid and hard to process. Joo <jats:italic>et al.</jats:italic> synthesized a redox-active, nonconjugated radical polymer that exhibited high conductivity (see the Perspective by Lutkenhaus). The polymer has a low glass transition temperature, allowing it to form intermolecular percolation networks for electrons. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1391" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aao7287">1391</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6382" page="1334" related-article-type="in-this-issue" vol="359" xlink:href="10.1126/science.aat1298">1334</jats:related-article> </jats:p>