Catálogo de publicaciones - revistas

<jats:title>Humans have a good sense of smell</jats:title> <jats:p>In comparison to that of other animals, the human sense of smell is widely considered to be weak and underdeveloped. This is, however, an unproven hypothesis. In a Review, McGann traces the origins of this false belief back to comparative 19th-century neuroanatomical studies by Broca. A modern look at the human olfactory bulb shows that it is rather large compared with those of rats and mice, which are presumed to possess a superior sense of smell. In fact, the number of olfactory bulb neurons across 24 mammalian species is comparatively similar, with humans in the middle of the pack, and our sense of smell is similar to that of other mammals.</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="6338" page="eaam7263" related-article-type="in-this-issue" vol="356" xlink:href="10.1126/science.aam7263">eaam7263</jats:related-article> </jats:p>

<jats:title>Search and capture in space and time</jats:title> <jats:p> How immunological T cells scan target cells for ligands is poorly understood. Cai <jats:italic>et al.</jats:italic> examined microvillar dynamics in living T cells in three dimensions and real time. The T cells palpated all spots on a surface within about 1 min through rapid movements of their microvilli. The time it took to scan the surface matched the movement rate of cells through tissues. These contacts took place in the absence of T cell receptor recognition and were stabilized independently of signaling or the cytoskeleton. Instead, stabilization depended on ligand affinity. The findings explain why many of the previously described components of the immunological synapse and T cell receptor signaling reside on three-dimensional microvillar-derived projections. </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="6338" page="eaal3118" related-article-type="in-this-issue" vol="356" xlink:href="10.1126/science.aal3118">eaal3118</jats:related-article> </jats:p>

<jats:p>On 10 April, Hungarian President János Áder signed into law an amendment to the National Higher Education Law that would outlaw the Central European University (CEU). Although portrayed by the government as a purely administrative step, the “Lex-CEU” law is a strident attempt to curtail academic freedom and limit the independence of academic institutions.</jats:p>

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

<jats:p>Researchers hash out ethical, legal issues raised by large sequence database of AIDS virus.</jats:p>

<jats:p>Brazil's move to hire private firm spurs criticism.</jats:p>