25期

最新文章

• Quenching of zonal winds in Jupiter's interior AI翻译
  作者：Christensen, Ulrich R.; Wulff, Paula N.
  作者单位：Max Planck Society
  摘要：Gravity and magnetic field data obtained by the Juno mission show that Jupiter's strong zonal winds extend a few thousand kilometers into the interior, but are quenched above the level where the electrical conductivity becomes significant. Here, we extend a simple linearized model [Christensen et al., Astrophys. J. 890, 61 (2020)] that explains the braking of the jets by the combination of stable stratification and electromagnetic effects. We show that in the inviscid limit, the process is ess...
• Hundreds of antimicrobial peptides create a selective barrier for insect gut symbionts AI翻译
  作者：Lachat, Joy; Lextrait, Gaelle; Jouan, Romain; Boukherissa, Amira; Yokota, Aya; Jang, Seonghan; Ishigami, Kota; Futahashi, Ryo; Cossard, Raynald; Naquin, Delphine; Costache, Vlad; Augusto, Luis; Tissieres, Pierre; Biondi, Emanuele G.; Alunni, Benoit; Timchenko, Tatiana; Ohbayashi, Tsubasa; Kikuchi, Yoshitomo; Mergaert, Peter
  作者单位：Universite Paris Saclay; Centre National de la Recherche Scientifique (CNRS); CEA; National Institute of Advanced Industrial Science & Technology (AIST); Hokkaido University; National Institute of Advanced Industrial Science & Technology (AIST); INRAE; Korea Research Institute of Bioscience & Biotechnology (KRIBB); AgroParisTech; INRAE; Universite Paris Saclay; National Agriculture & Food Research Organization - Japan
  摘要：The spatial organization of gut microbiota is crucial for the functioning of the gut ecosystem, although the mechanisms that organize gut bacterial communities in microhabitats are only partially understood. The gut of the insect Riptortus pedestris has a characteristic microbiota biogeography with a multispecies community in the anterior midgut and a monospecific bacterial population in the posterior midgut. We show that the posterior midgut region produces massively hundreds of specific anti...
• Nationwide law enforcement impact on the pet bird trade in China AI翻译
  作者：Liang, Zhijian; Hu, Sifan; Zhong, Jia; Wei, Qian; Ruan, Xiangdong; Zhang, Li; Lee, Tien Ming; Liu, Yang
  作者单位：Sun Yat Sen University; Sun Yat Sen University; Sun Yat Sen University; Beijing Normal University
  摘要：Conservation enforcement is a direct strategy to combat illegal wildlife trade in open markets. Yet, its large- scale effectiveness has not been widely assessed due to the lack of extensive market data. Between August 2016 and June 2017, a national coordinated enforcement campaign led by the leading Chinese authority to combat illegal migratory bird trade coincided with the largest- ever pet bird market survey across China by voluntary birdwatchers before and after the enforcement, which serve...
• Facet- switching of rate- determining step on copper in CO2-to- ethylene electroreduction AI翻译
  作者：Zhang, Yu-Cai; Zhang, Xiao-Long; Wu, Zhi-Zheng; Niu, Zhuang-Zhuang; Chi, Li-Ping; Gao, Fei-Yue; Yang, Peng-Peng; Wang, Ye-Hua; Yu, Peng-Cheng; Duanmu, Jing-Wen; Sun, Shu-Ping; Gao, Min-Rui
  作者单位：Chinese Academy of Sciences; University of Science & Technology of China, CAS
  摘要：Reduction of carbon dioxide (CO2) by renewable electricity to produce multicarbon chemicals, such as ethylene (C2H4), continues to be a challenge because of insufficient Faradaic efficiency, low production rates, and complex mechanistic pathways. Here, we report that the rate-determining steps (RDS) on common copper (Cu) surfaces diverge in CO2 electroreduction, leading to distinct catalytic performances. Through a combination of experimental and computational studies, we reveal that C & horba...
• Quantifying chemical short-range order in metallic alloys AI翻译
  作者：Sheriff, Killian; Cao, Yifan; Smidt, Tess; Freitas, Rodrigo
  作者单位：Massachusetts Institute of Technology (MIT); Massachusetts Institute of Technology (MIT)
  摘要：Metallic alloys often form phases-known as solid solutions-in which chemical elements are spread out on the same crystal lattice in an almost random manner. The tendency of certain chemical motifs to be more common than others is known as chemical short-range order (SRO), and it has received substantial consideration in alloys with multiple chemical elements present in large concentrations due to their extreme configurational complexity (e.g., high-entropy alloys). SRO renders solid solutions ...
• Temporal control of RNAi reveals both robust and labile feedback loops in the segmentation clock of the red flour beetle AI翻译
  作者：Kaufholz, Felix; Ulrich, Julia; Hakeemi, Muhammad Salim; Bucher, Gregor
  作者单位：University of Gottingen
  摘要：Animals from all major clades have evolved a segmented trunk, reflected in the human spine or the insect segments. These units emerge during embryogenesis from a posterior segment addition zone (SAZ), where repetitive gene activity is regulated by a mechanism described by the clock and wavefront/speed gradient model. In the red flour beetle Tribolium castaneum , RNA interference (RNAi) has been used to continuously knock down the function of primary pair - rule genes (pPRGs), caudal or Wnt pat...
• Alanine synthesized by alanine dehydrogenase enables ammonium- tolerant nitrogen fixation in Paenibacillus sabinae T27 (vol 119, e2215855119, 2022) AI翻译
  作者：Li, Qin; Zhang, Haowei; Song, Yi; Wang, Minyang; Hua, Chongchong; Li, Yashi; Chen, Sanfeng; Dixon, Ray; Li, Jilun
• Absolute income mobility obscures marginalized children's disadvantages AI翻译
  作者：Bloome, Deirdre; Opacic, Aleksei
  作者单位：Harvard University; Harvard University
  摘要：Intergenerational mobility captures the distance between the socioeconomic positions of parents versus their adult children. Researchers measure this distance in absolute and relative units, such as absolute dollars and relative ranks. Absolute and relative mobility often diverge. For example, absolute mobility can rise while relative mobility declines. How should scholars and policymakers understand this divergence? We conclude that they should understand it as follows: absolute mobility is l...
• RNF212B E3 ligase is essential for crossover designation and maturation during male and female meiosis in the mouse AI翻译
  作者：Condezo, Yazmine B.; Sainz-Urruela, Raquel; Gomez-H, Laura; Salas-Lloret, Daniel; Felipe-Medina, Natalia; Bradley, Rachel; Wolff, Ian D.; Tanis, Stephanie; Barbero, Jose Luis; Sanchez-Martin, Manuel; de Rooij, Dirk; Hendriks, Ivo A.; Nielsen, Michael L.; Gonzalez-Prieto, Roman; Cohen, Paula E.; Pendas, Alberto M.; Llano, Elena
  作者单位：University of Salamanca; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC-USAL - Instituto de Biologia Molecular y Celular del Cancer de Salamanca (IBMCC); University of Salamanca; Max Planck Society; Leiden University; Leiden University Medical Center (LUMC); Cornell University; Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro de Investigaciones Biologicas (CIB); University of Salamanca; Utrecht University; University of Copenhagen; Consejo Superior de Investigaciones Cientificas (CSIC); Universidad Pablo de Olavide; University of Sevilla; CSIC - Centro Andaluz de Biologia Molecular y Medicina Regenerativa (CABIMER); University of Sevilla; University of Salamanca
  摘要：Meiosis, a reductional cell division, relies on precise initiation, maturation, and resolution of crossovers (COs) during prophase I to ensure the accurate segregation of homologous chromosomes during metaphase I. This process is regulated by the interplay of RING- E3 ligases such as RNF212 and HEI10 in mammals. In this study, we functionally characterized a recently identified RING- E3 ligase, RNF212B. RNF212B colocalizes and interacts with RNF212, forming foci along chromosomes from zygonema...
• Historical redlining is associated with disparities in wildlife in four California cities AI翻译
  作者：Estien, Cesar O.; Fidino, Mason; Wilkinson, Christine E.; Morello-Frosch, Rachel; Schell, Christopher J.
  作者单位：University of California System; University of California Berkeley; California Academy of Sciences; University of California System; University of California Berkeley
  摘要：Legacy effects describe the persistent, long - term impacts on an ecosystem following the removal of an abiotic or biotic feature. Redlining, a policy that codified racial segregation and disinvestment in minoritized neighborhoods, has produced legacy effects with profound impacts on urban ecosystem structure and health. These legacies have detrimentally impacted public health outcomes, socioeconomic stability, and environmental health. However, the collateral impacts of redlining on wildlife ...