8019期

最新文章

• 'Fantastic' particle could be most energetic neutrino ever detected AI翻译
  作者：Castelvecchi, Davide
  摘要：The ultra-high-energy neutrino was spotted by deep-sea detectors and could point to a massive cosmic event.
• Dynamic stereomutation of vinylcyclopropanes with metalloradicals AI翻译
  作者：Mendel, Marvin; Karl, Teresa M.; Hamm, Jegor; Kaldas, Sherif J.; Sperger, Theresa; Mondal, Bhaskar; Schoenebeck, Franziska
  作者单位：RWTH Aachen University
  摘要：The ever increasing demands for greater sustainability and lower energy usage in chemical processes call for fundamentally new approaches and reactivity principles. In this context, the pronounced prevalence of odd-oxidation states in less precious metals bears untapped potential for fundamentally distinct reactivity modes via metalloradical catalysis(1-3). Contrary to the well-established reactivity paradigm that organic free radicals, upon addition to a vinylcyclopropane, lead to rapid ring ...
• Global variability in atmospheric new particle formation mechanisms AI翻译
  作者：Zhao, Bin; Donahue, Neil M.; Zhang, Kai; Mao, Lizhuo; Shrivastava, Manish; Ma, Po-Lun; Shen, Jiewen; Wang, Shuxiao; Sun, Jian; Gordon, Hamish; Tang, Shuaiqi; Fast, Jerome; Wang, Mingyi; Gao, Yang; Yan, Chao; Singh, Balwinder; Li, Zeqi; Huang, Lyuyin; Lou, Sijia; Lin, Guangxing; Wang, Hailong; Jiang, Jingkun; Ding, Aijun; Nie, Wei; Qi, Ximeng; Chi, Xuguang; Wang, Lin
  作者单位：Tsinghua University; United States Department of Energy (DOE); Pacific Northwest National Laboratory; Carnegie Mellon University; Carnegie Mellon University; Carnegie Mellon University; Carnegie Mellon University; National Center Atmospheric Research (NCAR) - USA; California Institute of Technology; Ocean University of China; Nanjing University; Fudan University; Xiamen University
  摘要：A key challenge in aerosol pollution studies and climate change assessment is to understand how atmospheric aerosol particles are initially formed(1,2). Although new particle formation (NPF) mechanisms have been described at specific sites(3-6), in most regions, such mechanisms remain uncertain to a large extent because of the limited ability of atmospheric models to simulate critical NPF processes(1,7). Here we synthesize molecular-level experiments to develop comprehensive representations of...
• Unchanged power dynamics still block equality in academia AI翻译
  作者：Tauber, Susanne; Mahmoudi, Morteza
  作者单位：University of Amsterdam; Michigan State University
• FAT LOT OF GOOD: LIPIDS HELP SEA-LIFE SURVIVE THE DEEP AI翻译
  作者：[Anonymous]
• Sex differences orchestrated by androgens at single-cell resolution (vol 629, pg 193, 2024) AI翻译
  作者：Li, Fei; Xing, Xudong; Jin, Qiqi; Wang, Xiang-Ming; Dai, Pengfei; Han, Ming; Shi, Huili; Zhang, Ze; Shao, Xianlong; Peng, Yunyi; Zhu, Yiqin; Xu, Jiayi; Li, Dan; Chen, Yu; Wu, Wei; Wang, Qiao; Yu, Chen; Chen, Luonan; Bai, Fan; Gao, Dong
• Observation of edge states derived from topological helix chains AI翻译
  作者：Nakayama, K.; Tokuyama, A.; Yamauchi, K.; Moriya, A.; Kato, T.; Sugawara, K.; Souma, S.; Kitamura, M.; Horiba, K.; Kumigashira, H.; Oguchi, T.; Takahashi, T.; Segawa, K.; Sato, T.
  作者单位：Tohoku University; Japan Science & Technology Agency (JST); University of Osaka; Tohoku University; Tohoku University; High Energy Accelerator Research Organization (KEK); Tohoku University; Kyoto Sangyo University; Tohoku University; Tohoku University
  摘要：Introducing the concept of topology has revolutionized materials classification, leading to the discovery of topological insulators and Dirac-Weyl semimetals(1-3). One of the most fundamental theories underpinning topological materials is the Su-Schrieffer-Heeger (SSH) model(4,5), which was developed in 1979-decades before the recognition of topological insulators-to describe conducting polymers. Distinct from the vast majority of known topological insulators with two and three dimensions(1-3)...
• In vitro reconstitution of epigenetic reprogramming in the human germ line AI翻译
  作者：Murase, Yusuke; Yokogawa, Ryuta; Yabuta, Yukihiro; Nagano, Masahiro; Katou, Yoshitaka; Mizuyama, Manami; Kitamura, Ayaka; Puangsricharoen, Pimpitcha; Yamashiro, Chika; Hu, Bo; Mizuta, Ken; Tsujimura, Taro; Yamamoto, Takuya; Ogata, Kosuke; Ishihama, Yasushi; Saitou, Mitinori
  作者单位：Kyoto University; Kyoto University; Kyoto University; RIKEN; Kyoto University
  摘要：Epigenetic reprogramming resets parental epigenetic memories and differentiates primordial germ cells (PGCs) into mitotic pro-spermatogonia or oogonia. This process ensures sexually dimorphic germ cell development for totipotency(1). In vitro reconstitution of epigenetic reprogramming in humans remains a fundamental challenge. Here we establish a strategy for inducing epigenetic reprogramming and differentiation of pluripotent stem-cell-derived human PGC-like cells (hPGCLCs) into mitotic pro-s...
• The maths that drives AI AI翻译
  作者：Brooks, Michael
  摘要：Loss functions measure algorithmic errors in artificial-intelligence models, but there's more than one way to do that. Here's why the right function is so important.
• 2023 summer warmth unparalleled over the past 2,000 years AI翻译
  作者：Esper, Jan; Torbenson, Max; Buentgen, Ulf
  作者单位：Johannes Gutenberg University of Mainz; Czech Academy of Sciences; Global Change Research Centre of the Czech Academy of Sciences; University of Cambridge; Masaryk University
  摘要：Including an exceptionally warm Northern Hemisphere summer(1,2), 2023 has been reported as the hottest year on record(3-5). However, contextualizing recent anthropogenic warming against past natural variability is challenging because the sparse meteorological records from the nineteenth century tend to overestimate temperatures(6). Here we combine observed and reconstructed June-August surface air temperatures to show that 2023 was the warmest Northern Hemisphere extra-tropical summer over the...