Catálogo de publicaciones - revistas

<jats:title>Cytoneme signaling in fly development</jats:title> <jats:p> During development of certain tissues in the fruit fly, signaling from one tissue to another appears to occur through specialized filopodia called cytonemes. The cytonemes contain receptors and reach close toward the signal-producing cells. Huang <jats:italic>et al.</jats:italic> report that components of neuronal signaling at synapses also function in proper formation of cytoneme appositions and signaling. Various manipulations of calcium signaling, expression of dominant-negative glutamate receptor proteins, or depletion of vesicle transport proteins or components of voltage-gated calcium channels influenced the presence of cytonemes and signaling. </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="6430" page="948" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aat5053">948</jats:related-article> </jats:p>

<jats:title>Impact craters on Pluto and Charon</jats:title> <jats:p> Collisions between Solar System bodies produce impact craters on large objects at a rate that depends on the population of impacting small bodies. Singer <jats:italic>et al.</jats:italic> examined impact craters on Pluto and its moon Charon. Some regions have had their impact craters erased by recent geological processes, but others appear to record 4 billion years of impacts. Because Pluto and Charon are located in the Kuiper belt, the distribution of crater sizes reflects the size distribution of impacting Kuiper belt objects (KBOs). The authors found fewer small KBOs than predicted by models of collision equilibrium, implying that some of the KBO population has been preserved since the formation of the Solar System. </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="6430" page="955" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aap8628">955</jats:related-article> </jats:p>

<jats:title>Phases of multielement nanoparticles</jats:title> <jats:p> Thermodynamically stable metal nanoparticles composed of multiple elements could, in principle, exhibit several different phases that form multiple interfaces. Chen <jats:italic>et al.</jats:italic> explored the structure and composition of palladium-tin alloy nanoparticles formed with up to five other elements after high-temperature annealing. Triphase nanoparticles possessed two or three interface architectures, and tetraphase nanoparticles exhibited up to six interfaces. Theoretical and experimental studies revealed how the balance between surface and interfacial energies influences the observed phases and interface structure. </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="6430" page="959" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aav4302">959</jats:related-article> </jats:p>

<jats:title>Making a (precision) measure of light</jats:title> <jats:p> When measuring length, we learn in school that a vernier scale that uses two rulers, slightly offset, can reduce human estimation error and improve the resolution of a measurement. Yang <jats:italic>et al.</jats:italic> apply the same vernier principle with optical combs to develop a spectrometer that can determine the wavelength of light with high accuracy and precision. Two phase-locked counterpropagating optical microcombs generated in a miniature microresonator provided the rulers. Matching up of the “teeth” of the combs was then used to measure the wavelength of the optical light sources. </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="6430" page="965" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aaw2317">965</jats:related-article> </jats:p>

<jats:title>Merging produced a structured jet</jats:title> <jats:p> The binary neutron star merger event GW170817 was observed with gravitational waves and across the electromagnetic spectrum. However, the physical processes that produced that emission remain poorly understood, particularly the late-time x-ray and radio emission. Ghirlanda <jats:italic>et al.</jats:italic> observed the radio afterglow with an interferometric array of 32 radio telescopes spread across the globe. The size and position of the radio source are not compatible with a uniformly expanding cocoon, as some have suggested. Instead, the data indicate that GW170817 produced a structured jet of material that escaped the surrounding ejecta and is now expanding into the interstellar medium at relativistic speeds. </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="6430" page="968" related-article-type="in-this-issue" vol="363" xlink:href="10.1126/science.aau8815">968</jats:related-article> </jats:p>