Catálogo de publicaciones - revistas

<jats:p>A flexible mindset can help us bounce back after adversity</jats:p>

<jats:p>Invoking shared values can help convince skeptics of the need to mitigate climate change</jats:p>

<jats:p> Highlights from the <jats:italic>Science</jats:italic> family of journals </jats:p>

<jats:p>Editors’ selections from the current scientific literature</jats:p>

<jats:title>Defining tumor cell immune evasion</jats:title> <jats:p> Mouse models used to study cancer often lack a full immune system, allowing implantation of human tumors into the mice. By contrast, naturally evolving tumors must contend with a fully functional immune system and its destruction of some of the cells (see the Perspective by Ho and Wood). Two groups now report studies on mouse models with a fully intact immune system. Martin <jats:italic>et al</jats:italic> . started with preexisting murine tumor cell lines and examined their continued evolution in vivo, whereas Del Poggetto <jats:italic>et al</jats:italic> . examined the development of new pancreatic tumors in the context of inflammation, as is often seen in human patients. In each study, the authors found that the immune system exerted a selective pressure on cells that would give rise to tumors, promoting the survival of those that had lost expression of tumor suppressor genes or activated a specific oncogene. The findings suggest a major role for the immune system in driving tumor evolution across multiple types of cancer. —YN </jats:p>

<jats:title>Silver in the linings</jats:title> <jats:p> The bacterium <jats:italic>Shewanella oneidensis</jats:italic> is well known to use extracellular electron sinks, metal oxides and ions in nature or electrodes when cultured in a fuel cell, to power the catabolism of organic material. However, the power density of microbial fuel cells has been limited by various factors that are mostly related to connecting the microbes to the anode. Cao <jats:italic>et al</jats:italic> . found that a reduced graphene oxide–silver nanoparticle anode circumvents some of these issues, providing a substantial increase in current and power density (see the Perspective by Gaffney and Minteer). Electron microscopy revealed silver nanoparticles embedded or attached to the outer cell membrane, possibly facilitating electron transfer from internal electron carriers to the anode. —MAF </jats:p>

<jats:title>Fragmenting the condensate</jats:title> <jats:p> In a Bose-Einstein condensate, a sizable fraction of particles occupies a single quantum state. In some systems, it is in principle possible to have more than one such macroscopically occupied state. Evrard <jats:italic>et al</jats:italic> . observed this so-called fragmented condensate in an ultracold gas of bosonic sodium atoms with three spin states. Starting from a single condensate in a static magnetic field, the researchers decreased the field to zero, resulting in a three-fragment condensate. —JS </jats:p>