2023

最新文章

• CHINA China's research enterprise undergoes shake-up AI翻译
  作者：Normile, Dennis
• PARTICLE PHYSICS A call for change at storied physics lab AI翻译
  作者：Cho, Adrian
• The evolution of white-tailed jackrabbit camouflage AI翻译
  作者：Ferreira, Mafalda S.; Thurman, Timothy J.; Jones, Matthew R.; Farelo, Liliana; Kumar, Alexander, V; Mortimer, Sebastian M. E.; Demboski, John R.; Mills, L. Scott; Alves, Paulo C.; Melo-Ferreira, Jose; Good, Jeffrey M.
  作者单位：Universidade do Porto; Universidade do Porto; University of Montana System; University of Montana; University of Montana System; University of Montana; United States Department of the Interior; US Fish & Wildlife Service; University of Montana System; University of Montana; Uppsala University
  摘要：The genetic basis of adaptive traits has rarely been used to predict future vulnerability of populations to climate change. We show that light versus dark seasonal pelage in white-tailed jackrabbits (Lepus townsendii) tracks snow cover and is primarily determined by genetic variation at endothelin receptor type B (EDNRB), corin serine peptidase (CORIN), and agouti signaling protein (ASIP). Winter color variation was associated with deeply divergent alleles at these genes, reflecting selection ...
• Ferroelectricity in layered bismuth oxide down to 1 nanometer AI翻译
  作者：Yang, Qianqian; Hu, Jingcong; Fang, Yue-Wen; Jia, Yueyang; Yang, Rui; Deng, Shiqing; Lu, Yue; Dieguez, Oswaldo; Fan, Longlong; Zheng, Dongxing; Zhang, Xixiang; Dong, Yongqi; Luo, Zhenlin; Wang, Zhen; Wang, Huanhua; Sui, Manling; Xing, Xianran; Chen, Jun; Tian, Jianjun; Zhang, Linxing
  作者单位：University of Science & Technology Beijing; Beijing University of Technology; University of Basque Country; University of Basque Country; Shanghai Jiao Tong University; Tel Aviv University; Chinese Academy of Sciences; Institute of High Energy Physics, CAS; University of Chinese Academy of Sciences, CAS; King Abdullah University of Science & Technology; Chinese Academy of Sciences; University of Science & Technology of China, CAS; University of Science & Technology Beijing; University of Science & Technology Beijing
  摘要：Atomic-scale ferroelectrics are of great interest for high-density electronics, particularly field-effect transistors, low-power logic, and nonvolatile memories. We devised a film with a layered structure of bismuth oxide that can stabilize the ferroelectric state down to 1 nanometer through samarium bondage. This film can be grown on a variety of substrates with a cost-effective chemical solution deposition. We observed a standard ferroelectric hysteresis loop down to a thickness of similar t...
• Four-dimensional optics using time-varying metamaterials AI翻译
  作者：Engheta, Nader
  作者单位：University of Pennsylvania
• Visualizing the atomic-scale origin of metallic behavior in Kondo insulators AI翻译
  作者：Pirie, Harris; Mascot, Eric; Matt, Christian E.; Liu, Yu; Chen, Pengcheng; Hamidian, M. H.; Saha, Shanta; Wang, Xiangfeng; Paglione, Johnpierre; Luke, Graeme; Goldhaber-Gordon, David; Hirjibehedin, Cyrus F.; Davis, J. C. Seamus; Morr, Dirk K.; Hoffman, Jennifer E.
  作者单位：Harvard University; University of Oxford; University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital; University System of Maryland; University of Maryland College Park; McMaster University; Stanford University; Stanford University; United States Department of Energy (DOE); SLAC National Accelerator Laboratory; University of London; University College London; University of London; University College London; University of London; University College London; University College Cork; Cornell University; Max Planck Society; Massachusetts Institute of Technology (MIT); Lincoln Laboratory
  摘要：A Kondo lattice is often electrically insulating at low temperatures. However, several recent experiments have detected signatures of bulk metallicity within this Kondo insulating phase. In this study, we visualized the real-space charge landscape within a Kondo lattice with atomic resolution using a scanning tunneling microscope. We discovered nanometer-scale puddles of metallic conduction electrons centered around uranium-site substitutions in the heavy-fermion compound uranium ruthenium sil...
• Shadowed by past, gene- editing summit looks to future London meeting touts sickle cell success, but questions about embryo editing linger AI翻译
  作者：Kupferschmidt, Kai
• Structural basis for SMAC-mediated antagonism of caspase inhibition by the giant ubiquitin ligase BIRC6 AI翻译
  作者：Dietz, Larissa; Ellison, Cara J.; Riechmann, Carlos; Cassidy, C. Keith; Felfoldi, F. Daniel; Pinto-Fernandez, Adan; Kessler, Benedikt M.; Elliott, Paul R.
  作者单位：University of Oxford; University of Oxford; University of Oxford; Chinese Academy of Medical Sciences - Peking Union Medical College; University of London; University College London
  摘要：Certain inhibitor of apoptosis (IAP) family members are sentinel proteins that prevent untimely cell death by inhibiting caspases. Antagonists, including second mitochondria-derived activator of caspases (SMAC), regulate IAPs and drive cell death. Baculoviral IAP repeat-containing protein 6 (BIRC6), a giant IAP with dual E2 and E3 ubiquitin ligase activity, regulates programmed cell death through unknown mechanisms. We show that BIRC6 directly restricts executioner caspase-3 and-7 and ubiquiti...
• The Devil's Element: Phosphorus and a World Out of Balance AI翻译
  作者：Howarth, Robert W.
  作者单位：Cornell University
• Intensity scale for atmospheric rivers reveals global hot spots AI翻译
  作者：Brainard, Jeffrey
  摘要：NEUTRON RESEARCH | This week, regulators gave the go-ahead to restart a small U.S. research reactor, 2 years after an accident shut it down and cut almost by half the nation's capacity to use neutrons to study materials. The February 2021 incident at the 20-megawatt, neutrongenerating reactor at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland, occurred when one of its 30 rodlike, uranium-filled fuel pins popped out of place, overheated, and partially melted....