Catálogo de publicaciones - revistas

<jats:title>Sorting molecules with DNA robots</jats:title> <jats:p> Single-stranded DNA robots can move over the surface of a DNA origami sheet and sort molecular cargoes. Thubagere <jats:italic>et al.</jats:italic> developed a simple algorithm for recognizing two types of molecular cargoes and their drop-off destinations on the surface (see the Perspective by Reif). The DNA robot, which has three modular functional domains, repeatedly picks up the two types of molecules and then places them at their target destinations. No additional power is required because the DNA robot does this by random walking across the origami surface. </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="6356" page="eaan6558" related-article-type="in-this-issue" vol="357" xlink:href="10.1126/science.aan6558">eaan6558</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6356" page="1095" related-article-type="in-this-issue" vol="357" xlink:href="10.1126/science.aao5125">1095</jats:related-article> </jats:p>

<jats:p> Hong <jats:italic>et al</jats:italic> . (Reports, 5 May 2017, p. 527) suggested that previous studies of the biogeochemically significant marine cyanobacterium <jats:italic>Trichodesmium</jats:italic> showing increased growth and nitrogen fixation at projected future high CO <jats:sub>2</jats:sub> levels suffered from ammonia or copper toxicity. They reported that these rates instead decrease at high CO <jats:sub>2</jats:sub> when contamination is alleviated. We present and discuss results of multiple published studies refuting this toxicity hypothesis. </jats:p>

<jats:p>Our hearts go out to those affected by hurricanes Harvey and Irma and by earlier monsoons across South Asia. These events are compelling reminders of the important role that science must play in preparing for disasters. But preparation is challenging, as reflected in the many facets of the “science of preparedness.” Certainly, modeling and forecasting storms are critical, but so are analyses of how agencies, communities, and individuals interact to understand and implement preparedness initiatives.</jats:p>

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

<jats:p>Fake social media profiles are proliferating, but their potency is unclear.</jats:p>

<jats:p>Agency says it might still renew funding opportunity, which answered Obama call after school shooting.</jats:p>

<jats:p>Flipped DNA speeds the emergence of new sets of traits.</jats:p>

<jats:p>Magnitude-8.2 earthquake may have relieved stress in Tehuantepec gap after more than 100 years of quiet.</jats:p>

<jats:p>Researchers' zealous effort to protect intellectual property has included legal threats.</jats:p>

<jats:p>Island somehow resisted homogenization seen elsewhere.</jats:p>