Catálogo de publicaciones - revistas

<jats:title>Spinal cord stem cells</jats:title> <jats:p> Injuries to the mammalian spinal cord do not heal easily. Llorens- Bobadilla <jats:italic>et al.</jats:italic> studied mouse ependymal cells, which function as stem cells for the spinal cord (see the Perspective by Becker and Becker). Chromatin accessibility and transcriptomic assays revealed that these cells carry a latent ability to differentiate into oligodendrocytes, which is much needed for remyelination of axons around an injury. The ependymal cells were triggered to differentiate into oligodendrocytes by expression of the oligodendrocyte lineage transcription factor OLIG2. Expression of OLIG2 in ependymal cells specifically and inducibly enabled the production of oligodendrocytes. The ependymal-derived oligodendrocytes aided axon remyelination and improved axon conduction after spinal cord injury. </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.abb8795">eabb8795</jats:related-article> ; see also p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" issue="6512" page="36" related-article-type="in-this-issue" vol="370" xlink:href="10.1126/science.abe1661">36</jats:related-article> </jats:p>

<jats:title>Moving a perovskite into the black</jats:title> <jats:p> The bandgap of the black α-phase FAPbI <jats:sub>3</jats:sub> (where FA is formamidinium) is nearly ideal for solar cells, but it is unstable with respect to the photoinactive yellow δ-phase. Lu <jats:italic>et al.</jats:italic> found that a film of the yellow phase was converted to a highly crystalline black phase by vapor exposure to methylammonium thiocyanate at 100°C, and it retained this structure after 500 hours at 85°C. Solar cells fabricated with this material had a power conversion efficiency of more than 23%. After 500 hours under maximum power tracking and a period of dark recovery, 94% of the original efficiency was retained. </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.abb8985">eabb8985</jats:related-article> </jats:p>

<jats:p>It can seem like Earth itself is on fire. In places such as Australia and California for which fire is a natural feature, landscapes are burning at historic if not epic scales. In the Arctic and Greenland, where fire is rare, tundra is smoldering and melting permafrost. In Amazonia, Indonesia, and Mediterranean Europe, fires are interacting with the land clearing of rainforest, the draining of peatlands, and the abandonment of rural lands to create damaging, even lethal, conditions.</jats:p>

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

<jats:p>Ingesting more data than ever before, exascale model will simulate the impact of climate change on humans.</jats:p>