Catálogo de publicaciones - revistas

<jats:p>A broader taxonomic base to threatened species assessments will enable better conservation and policy decisions.</jats:p>

<jats:p>Susceptibility to obesity is influenced by the interaction between microbes and immune system function in our digestive system.</jats:p>

<jats:p> The byssal threads that secure mussels onto surfaces have a hard coating created by iron cross-links of proteins rich in <jats:sc>l</jats:sc> -dopa. </jats:p>

<jats:p>It has been known for 10 years that the site of the Maule mega-earthquake of 27 February 2010 was fully locked and ready to break.</jats:p>

<jats:p>Probes that can now measure a variety of nanomechanical properties provide opportunities for new science and devices.</jats:p>

<jats:p>The therapeutic effect of arsenic on promyelocytic leukemia depends on direct binding of the compound to the causative oncogenic protein.</jats:p>

<jats:p>Can graphite monolayers outcompete traditional heat-spreading materials in electronic devices?</jats:p>

<jats:title>Ultrafast Imaging</jats:title> <jats:p> Optical microscopy is generally limited in resolution by the wavelength of light incident on the substrate. Because these wavelengths, even in the ultraviolet, are on the order of hundreds of nanometers, electron beams have long been used instead to probe structural detail at the smallest scale. While offering exceptional spatial resolution, electrons repel one another and so cannot be compressed in time as easily as a pulse of light. Electron microscopy has thus traditionally been a comparatively static characterization method. <jats:bold>Zewail</jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="187" related-article-type="in-this-issue" vol="328" xlink:href="10.1126/science.1166135">187</jats:related-article> ) reviews recent technological developments in stripping down the electron pulses used for imaging that have been able to introduce time resolution of trillionths of a second to this spatially precise technique. Local transformations ranging from graphite film oscillations to iron phase transitions have been tracked in this manner. </jats:p>

<jats:title> From <jats:italic>Australopithecus</jats:italic> to <jats:italic>Homo</jats:italic> </jats:title> <jats:p> Our genus <jats:italic>Homo</jats:italic> is thought to have evolved a little more than 2 million years ago from the earlier hominid <jats:italic>Australopithecus</jats:italic> . But there are few fossils that provide detailed information on this transition. <jats:bold> Berger <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="195" related-article-type="in-this-issue" vol="328" xlink:href="10.1126/science.1184944">195</jats:related-article> ; see the cover) now describe two partial skeletons, including most of the skull, pelvis, and ankle, of a new species of <jats:italic>Australopithecus</jats:italic> that are informative. The skeletons were found in a cave in South Africa encased in sediments dated by <jats:bold> Dirks <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="205" related-article-type="in-this-issue" vol="328" xlink:href="10.1126/science.1184950">205</jats:related-article> ) to about 1.8 to 1.9 million years ago. The fossils share many derived features with the earliest <jats:italic>Homo</jats:italic> species, including in its pelvis and smaller teeth, and imply that the transition to <jats:italic>Homo</jats:italic> was in stages. </jats:p>

<jats:title> From <jats:italic>Australopithecus</jats:italic> to <jats:italic>Homo</jats:italic> </jats:title> <jats:p> Our genus <jats:italic>Homo</jats:italic> is thought to have evolved a little more than 2 million years ago from the earlier hominid <jats:italic>Australopithecus</jats:italic> . But there are few fossils that provide detailed information on this transition. <jats:bold> Berger <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="195" related-article-type="in-this-issue" vol="328" xlink:href="10.1126/science.1184944">195</jats:related-article> ; see the cover) now describe two partial skeletons, including most of the skull, pelvis, and ankle, of a new species of <jats:italic>Australopithecus</jats:italic> that are informative. The skeletons were found in a cave in South Africa encased in sediments dated by <jats:bold> Dirks <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="205" related-article-type="in-this-issue" vol="328" xlink:href="10.1126/science.1184950">205</jats:related-article> ) to about 1.8 to 1.9 million years ago. The fossils share many derived features with the earliest <jats:italic>Homo</jats:italic> species, including in its pelvis and smaller teeth, and imply that the transition to <jats:italic>Homo</jats:italic> was in stages. </jats:p>