Catálogo de publicaciones - revistas

<jats:title>Ensemble activity and perception</jats:title> <jats:p> The mechanisms by which sensory percepts are encoded in neural ensembles are still incompletely understood. Chong <jats:italic>et al.</jats:italic> used single-spot optogenetic stimulation to control neuronal activity in mouse olfactory glomeruli in space and time. Animals were trained to recognize a learned activity pattern that was likely perceived as a specific odor. The authors then systematically varied the activity patterns by changing either the activated glomeruli or the timing between activation of glomeruli to evaluate their impact on odor recognition. Glomeruli that were activated early during the synthetic odor contributed more to odor recognition than glomeruli that were subsequently activated. This approach allows neuroscience to explain how features combine in complex patterns to generate perception. </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" related-article-type="in-this-issue" xlink:href="10.1126/science.aba2357">eaba2357</jats:related-article> </jats:p>

<jats:title>Perovskite decomposition in detail</jats:title> <jats:p> Solar cells are subject to heating when operating in sunlight, and the organic components of hybrid perovskite solar cells, especially the commonly used methylammonium cation, can undergo thermal decomposition. Encapsulation can limit decomposition by bringing such reactions to equilibrium and can prevent exposure to damaging ambient moisture. Shi <jats:italic>et al.</jats:italic> examined several encapsulation schemes for perovskite films and devices by probing volatile products with gas chromatography–mass spectrometry (see the Perspective by Juarez-Perez and Haro). Pressure-tight polymer/glass stack encapsulation was effective in suppressing gas transfer and allowed solar cells containing methylammonium to pass harsh moisture and thermal cycling tests. </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" related-article-type="in-this-issue" xlink:href="10.1126/science.aba2412">eaba2412</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6497" page="1309" related-article-type="in-this-issue" vol="368" xlink:href="10.1126/science.abc5401">1309</jats:related-article> </jats:p>

<jats:title>Secrets of Meissner corpuscles</jats:title> <jats:p> The Meissner corpuscle, a mechanosensory end organ, was discovered more than 165 years ago and has since been found in the glabrous skin of all mammals, including that on human fingertips. Although prominently featured in textbooks, the function of the Meissner corpuscle is unknown. Neubarth <jats:italic>et al.</jats:italic> generated adult mice without Meissner corpuscles and used them to show that these corpuscles alone mediate behavioral responses to, and perception of, gentle forces (see the Perspective by Marshall and Patapoutian). Each Meissner corpuscle is innervated by two molecularly distinct, yet physiologically similar, mechanosensory neurons. These two neuronal subtypes are developmentally interdependent and their endings are intertwined within the corpuscle. Both Meissner mechanosensory neuron subtypes are homotypically tiled, ensuring uniform and complete coverage of the skin, yet their receptive fields are overlapping and offset with respect to each other. </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" related-article-type="in-this-issue" xlink:href="10.1126/science.abb2751">eabb2751</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6497" page="1311" related-article-type="in-this-issue" vol="368" xlink:href="10.1126/science.abc7610">1311</jats:related-article> </jats:p>

<jats:title>Risks to mitigation potential of forests</jats:title> <jats:p> Much recent attention has focused on the potential of trees and forests to mitigate ongoing climate change by acting as sinks for carbon. Anderegg <jats:italic>et al.</jats:italic> review the growing evidence that forests' climate mitigation potential is increasingly at risk from a range of adversities that limit forest growth and health. These include physical factors such as drought and fire and biotic factors, including the depredations of insect herbivores and fungal pathogens. Full assessment and quantification of these risks, which themselves are influenced by climate, is key to achieving science-based policy outcomes for effective land and forest management. </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" related-article-type="in-this-issue" xlink:href="10.1126/science.aaz7005">eaaz7005</jats:related-article> </jats:p>

<jats:p>With the spread of coronavirus disease 2019 (COVID-19), countries and states have instituted lockdowns. These decisions have been difficult and are sometimes described as benefiting the public health at the expense of the economy. Fear of contracting the coronavirus in health care settings has dissuaded people from screening, diagnosis, and treatment for non–COVID-19 diseases. The consequences for cancer outcomes, for example, could be substantial. What can be done to minimize this effect?</jats:p>