Catálogo de publicaciones - revistas

<jats:title>Composite stretchable conducting wires</jats:title> <jats:p> Think how useful a stretchable electronic “skin” could be. For example you could place it over an aircraft fuselage or a body to create a network of sensors, processors, energy stores, or artificial muscles. But it is difficult to make electronic interconnects and strain sensors that can stretch over such surfaces. Liu <jats:italic>et al.</jats:italic> created superelastic conducting fibers by depositing carbon nanotube sheets onto a prestretched rubber core (see the Perspective by Ghosh). The nanotubes buckled on relaxation of the core, but continued to coat it fully and could stretch enormously, with relatively little change in resistance. </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="6246" page="400" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa7952">400</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="382" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aac7417">382</jats:related-article> </jats:p>

<jats:title>Making hybrid quantum information systems</jats:title> <jats:p> Different physical implementations of qubits—quantum bits—each have their pros and cons. An appealing idea is to combine them into hybrid architectures, taking advantage of their respective strengths. Tabuchi <jats:italic>et al.</jats:italic> placed a ferromagnetic sphere and a superconducting qubit in a cavity and used an electromagnetic mode of the cavity as the mediator between the two. They achieved strong coupling between a collective magnetic mode of the sphere and the qubit. Viennot <jats:italic>et al.</jats:italic> coupled a single spin in a double quantum dot to photons in a cavity. Both approaches hold promise for future applications. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue pp. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="405" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa3693">405</jats:related-article> and <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="408" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa3786">408</jats:related-article> </jats:p>

<jats:title>Making hybrid quantum information systems</jats:title> <jats:p> Different physical implementations of qubits—quantum bits—each have their pros and cons. An appealing idea is to combine them into hybrid architectures, taking advantage of their respective strengths. Tabuchi <jats:italic>et al.</jats:italic> placed a ferromagnetic sphere and a superconducting qubit in a cavity and used an electromagnetic mode of the cavity as the mediator between the two. They achieved strong coupling between a collective magnetic mode of the sphere and the qubit. Viennot <jats:italic>et al.</jats:italic> coupled a single spin in a double quantum dot to photons in a cavity. Both approaches hold promise for future applications. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue pp. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="405" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa3693">405</jats:related-article> and <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="408" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa3786">408</jats:related-article> </jats:p>

<jats:title>Etching platinum nanocage catalysts</jats:title> <jats:p> Although platinum is an excellent catalyst for the oxygen reduction reaction that occurs in fuel cells, its scarcity continues to drive efforts to improve its utilization. Zhang <jats:italic>et al.</jats:italic> made nanocages of platinum by coating palladium nanocrystals with only a few layers of platinum and then etching away the palladium core (see the Perspective by Strasser). Platinum nanocages made using nanoscale octahedra and cubes of palladium displayed different catalytic activity for the oxygen reduction reaction. </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="6246" page="412" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab0801">412</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="379" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aac7861">379</jats:related-article> </jats:p>

<jats:title>Snakes' four-legged missing link</jats:title> <jats:p> It may surprise you to learn that snakes, like us, are tetrapods derived from an ancient four-legged ancestor. Martill <jats:italic>et al.</jats:italic> describe a fossil from the Brazilian Cretaceous period that contains a snakelike species that is elongate and serpentine, with both hind- and forelimbs (see the Perspective by Evans). This species appears to have been a burrower and shows clearly the early transitional stages from a lizardlike body plan to the smooth legless snakes we know today. </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="6246" page="416" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa9208">416</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="374" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aac5672">374</jats:related-article> </jats:p>

<jats:title>A deep sleep in coal beds</jats:title> <jats:p> Deep below the ocean floor, microorganisms from forest soils continue to thrive. Inagaki <jats:italic>et al.</jats:italic> analyzed the microbial communities in several drill cores off the coast of Japan, some sampling more than 2 km below the seafloor (see the Perspective by Huber). Although cell counts decreased with depth, deep coal beds harbored active communities of methanogenic bacteria. These communities were more similar to those found in forest soils than in other deep marine sediments. </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="6246" page="420" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa6882">420</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="376" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aac6673">376</jats:related-article> </jats:p>

<jats:title>Keeping synaptic plasticity plastic</jats:title> <jats:p> Neuronal synapses in the brain adjust according to shifting demands as we experience the world. This synaptic plasticity forms the basis for critical periods in the visual and somatosensory systems. Greenhill <jats:italic>et al.</jats:italic> have now found, in mice, a critical period for the development of plasticity itself. At the core is a protein that in its mutant form is associated with schizophrenia. Disrupting this protein's function temporarily during early development caused a failure in brain plasticity in adult mice. </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="6246" page="424" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa8481">424</jats:related-article> </jats:p>

<jats:title>Membrane contact sites promote lipid exchange</jats:title> <jats:p> Most membrane lipids are manufactured in the endoplasmic reticulum (ER). Different organelles and the plasma membrane (PM) have distinct phospholipid compositions. Chung <jats:italic>et al.</jats:italic> , working in mammalian cells, and Moser von Filseck <jats:italic>et al.</jats:italic> , working in yeast, both describe how a family of proteins is important in maintaining the balance of lipids within the cell. These special proteins accumulate at and tether contact sites between the ER and the PM and promote the exchange of specific phospholipids, which helps to maintain the PM's distinct identity. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue pp. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="428" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab1370">428</jats:related-article> and <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="432" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab1346">432</jats:related-article> </jats:p>

<jats:title>Membrane contact sites promote lipid exchange</jats:title> <jats:p> Most membrane lipids are manufactured in the endoplasmic reticulum (ER). Different organelles and the plasma membrane (PM) have distinct phospholipid compositions. Chung <jats:italic>et al.</jats:italic> , working in mammalian cells, and Moser von Filseck <jats:italic>et al.</jats:italic> , working in yeast, both describe how a family of proteins is important in maintaining the balance of lipids within the cell. These special proteins accumulate at and tether contact sites between the ER and the PM and promote the exchange of specific phospholipids, which helps to maintain the PM's distinct identity. </jats:p> <jats:p> <jats:italic>Science</jats:italic> , this issue pp. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="428" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab1370">428</jats:related-article> and <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="432" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aab1346">432</jats:related-article> </jats:p>

<jats:title>Trafficking from bedside to bench</jats:title> <jats:p> Typically in translational research, a discovery in cell or molecular biology is later exploited to improve patient care. Occasionally, information flows in the opposite direction. Lo <jats:italic>et al.</jats:italic> found that patients with an autoimmune disorder caused by deficiency of a protein called LRBA responded dramatically to the drug abatacept (see the Perspective by Sansom). Abatacept contains a segment of a potent inhibitory immune receptor, CTLA4. Experiments prompted by this observation revealed the relationship between the two proteins: LRBA controls the intracellular trafficking and degradation of CTLA4. This information may further improve patient care, because other clinically approved drugs have the desired mechanism of action with potentially fewer side effects. </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="6246" page="436" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aaa1663">436</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6246" page="377" related-article-type="in-this-issue" vol="349" xlink:href="10.1126/science.aac7888">377</jats:related-article> </jats:p>