Catálogo de publicaciones - revistas

<jats:title>African genomics and skin color</jats:title> <jats:p> Skin color varies among human populations and is thought to be under selection, with light skin maximizing vitamin D production at higher latitudes and dark skin providing UV protection in equatorial zones. To identify the genes that give rise to the palette of human skin tones, Crawford <jats:italic>et al.</jats:italic> applied genome-wide analyses across diverse African populations (see the Perspective by Tang and Barsh). Genetic variants were identified with likely function in skin phenotypes. Comparison to model organisms verified a conserved function of <jats:italic>MFSD12</jats:italic> in pigmentation. A global genetic panel was used to trace how alleles associated with skin color likely moved across the globe as humans migrated, both within and out of Africa. </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="6365" page="eaan8433" related-article-type="in-this-issue" vol="358" xlink:href="10.1126/science.aan8433">eaan8433</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6365" page="867" related-article-type="in-this-issue" vol="358" xlink:href="10.1126/science.aaq1322">867</jats:related-article> </jats:p>

<jats:title>Peptide-based semiconductors</jats:title> <jats:p> For semiconductors, one often thinks of inorganic materials, such as doped silicon, or aromatic organic polymers and small molecules. Tao <jats:italic>et al.</jats:italic> review progress in making semiconductors based on self-assembling short peptides. The structures that form show extensive π and hydrogen bonding leading to a range of semiconductor properties, which can be tuned through doping or functionalization of the peptide sequences. These materials may shed light on biological semiconductors or provide an alternative for constructing biocompatible and therapeutic materials. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue p. <jats:related-article issue="6365" page="aam9756" related-article-type="in-this-issue" vol="358">aam9756</jats:related-article> </jats:p>

<jats:title>The domino effect in power failure</jats:title> <jats:p> Sometimes a power failure can be fairly local, but other times, a seemingly identical initial failure can cascade to cause a massive and costly breakdown in the system. Yang <jats:italic>et al.</jats:italic> built a model for the North American power grid network based on samples of data covering the years 2008 to 2013 (see the Perspective by D'Souza). Although the observed cascades were widespread, a small fraction of all network components, particularly the ones that were most cohesive within the network, were vulnerable to cascading failures. Larger cascades were associated with concurrent triggering events that were geographically closer to each other and closer to the set of vulnerable components. </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="6365" page="eaan3184" related-article-type="in-this-issue" vol="358" xlink:href="10.1126/science.aan3184">eaan3184</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6365" page="860" related-article-type="in-this-issue" vol="358" xlink:href="10.1126/science.aaq0474">860</jats:related-article> </jats:p>

<jats:p>With more than 8 million tons of plastic entering the ocean each year, humanity must urgently rethink the way we make and use plastics, so that they do not become waste in the first place.</jats:p>

<jats:p>A roundup of weekly science policy and related news.</jats:p>

<jats:p>New compounds activate opioid receptor in a way that protects breathing</jats:p>

<jats:p>Microwave-sensing CubeSats could bolster fragile polar weather satellite system</jats:p>