Catálogo de publicaciones - revistas

<jats:title>Less space but greater maize yield</jats:title> <jats:p> To meet increasing demands for food, modern agriculture works with increasingly dense plantings. Tian <jats:italic>et al.</jats:italic> identified a gene in teosinte, the wild ancestor of maize, and used it to alter maize such that the plant has a narrower architecture that nonetheless allows leaves access to sunlight (see the Perspective by Hake and Richardson). The yield advantage only becomes evident with the high-density plantings characteristic of modern agriculture, perhaps explaining why this gene was not brought into the fold during the previous millennia of maize domestication. </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="6454" page="658" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aax5482">658</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6454" page="640" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aay5299">640</jats:related-article> </jats:p>

<jats:title>Gravitational redshift in the Galactic Center</jats:title> <jats:p> General relativity predicts that light emitted by an object in a strong gravitational field—for example, close to a black hole—should be shifted to longer wavelengths. This gravitational redshift does not exist in the Newtonian theory of gravity. Do <jats:italic>et al.</jats:italic> monitored the position and spectrum of the star S0-2 as it passed Sagittarius A*, the supermassive black hole at the center of the Milky Way. Around the closest part of S0-2's 16-year orbit, they detected the effect of gravitational redshift on its spectrum. These results are more consistent with general relativity than Newtonian gravity at the 5σ level. </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="6454" page="664" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav8137">664</jats:related-article> </jats:p>

<jats:title>Lowering locomotion's metabolic cost</jats:title> <jats:p> Walking and running require different gaits, with each type of motion putting a greater bias on different muscles and joints. Kim <jats:italic>et al.</jats:italic> developed a soft, fully portable, lightweight exosuit that is able to reduce the metabolic rate for both running and walking by assisting each motion via the hip extension (see the Perspective by Pons). A waist belt holds most of the mass, thus reducing the cost of carrying the suit. By tracking the motion of the user, the suit is able to switch modes between the two types of motion automatically. </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="6454" page="668" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aav7536">668</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6454" page="636" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aaw9407">636</jats:related-article> </jats:p>

<jats:title>Switching on quantum dot lasers</jats:title> <jats:p> The optical properties of quantum dots can be tailored with alterations to their size and composition. Developing quantum dots as low-threshold laser sources requires overcoming problems associated with carrier recombination and stability. Kozlov <jats:italic>et al.</jats:italic> report success in this direction by demonstrating that a mix of processing and postsynthesis charging can overcome these problems. Synthesis of compositionally graded core-shell quantum dots followed by a carrier charging step provides stable, low-threshold lasing. </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="6454" page="672" related-article-type="in-this-issue" vol="365" xlink:href="10.1126/science.aax3489">672</jats:related-article> </jats:p>