Science

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• The Darkness Manifesto AI翻译
  作者：Kemp, Christopher
  作者单位：Michigan State University
• Response to comment on ?Sexual selection promotes giraffoid head-neck evolution and ecological adaptation? AI翻译
  作者：Wang, Shi-Qi; Meng, Jin; Mennecart, Bastien; Costeur, Loic; Ye, Jie; Li, Chunxiao; Zhang, Chi; Zhang, Ji; Aiglstorfer, Manuela; Wang, Yang; Wu, Yan; Wu, Wen-Yu; Deng, Tao
  作者单位：Chinese Academy of Sciences; Institute of Vertebrate Paleontology & Paleoanthropology, CAS; Chinese Academy of Sciences; American Museum of Natural History (AMNH); Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Huazhong University of Science & Technology; University of California System; University of California Berkeley; State University System of Florida; Florida State University; State University System of Florida; Florida State University
  摘要：Hou et al. challenged the giraffoid affinity of Discokeryx and its ecology and behavior. In our response we reiterate that Discokeryx is a giraffoid that, along with Giraffa, shows extreme evolution of head-neck morphologies that were presumably shaped by selective pressure from sexual competition and marginal environments.
• A shift to English in Algerian education AI翻译
  作者：Khelifa, Rassim
  作者单位：Concordia University - Canada
• Twitter's threat to curtail free data access angers scientists AI翻译
  作者：Kupferschmidt, Kai
• Farming in arid areas depletes China's water AI翻译
  作者：Song, Yongyong; Xue, Dongqian; Ma, Beibei; Xia, Siyou; Ye, Hao
  作者单位：Shaanxi Normal University; Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS
• Continuous-flow electrosynthesis of ammonia by nitrogen reduction and hydrogen oxidation AI翻译
  作者：Fu, Xianbiao; Pedersen, Jakob B.; Zhou, Yuanyuan; Saccoccio, Mattia; Li, Shaofeng; Salinas, Rokas; Li, Katja; Andersen, Suzanne Z.; Xu, Aoni; Deissler, Niklas H.; Mygind, Jon Bjarke Valbaek; Wei, Chao; Kibsgaard, Jakob; Vesborg, Peter C. K.; Norskov, Jens K.; Chorkendorff, Ib
  作者单位：Technical University of Denmark
  摘要：Ammonia is a critical component in fertilizers, pharmaceuticals, and fine chemicals and is an ideal, carbon-free fuel. Recently, lithium-mediated nitrogen reduction has proven to be a promising route for electrochemical ammonia synthesis at ambient conditions. In this work, we report a continuous-flow electrolyzer equipped with 25-square centimeter-effective area gas diffusion electrodes wherein nitrogen reduction is coupled with hydrogen oxidation. We show that the classical catalyst platinum...
• Searching for common ground AI翻译
  作者：Tan, Joshua
  作者单位：National Institutes of Health (NIH) - USA; Division of Intramural Research (DIR); NIH National Institute of Allergy & Infectious Diseases (NIAID)
• Photonic tinkering in the ocean AI翻译
  作者：Feller, Ate; Porter, Megan
  作者单位：Union College
• Dynamic kinetic asymmetric arylation and alkenylation of ketones AI翻译
  作者：Ruan, Lin-Xin; Sun, Bo; Liu, Jia-Ming; Shi, Shi-Liang
  作者单位：Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shanghai Institute of Organic Chemistry, CAS
  摘要：Despite the importance of enantioenriched alcohols in medicinal chemistry, total synthesis, and materials science, the efficient and selective construction of enantioenriched tertiary alcohols bearing two contiguous stereocenters has remained a substantial challenge. We report a platform for their preparation through the enantioconvergent, nickel-catalyzed addition of organoboronates to racemic, nonactivated ketones. We prepared several important classes of a,b-chiral tertiary alcohols in a si...
• A volatile sex attractant of tsetse flies AI翻译
  作者：Ebrahim, Shimaa A. M.; Dweck, Hany K. M.; Weiss, Brian L.; Carlson, John R.
  作者单位：Yale University; Yale University
  摘要：Tsetse flies transmit trypanosomes-parasites that cause devastating diseases in humans and livestock-across much of sub-Saharan Africa. Chemical communication through volatile pheromones is common among insects; however, it remains unknown if and how such chemical communication occurs in tsetse flies. We identified methyl palmitoleate (MPO), methyl oleate, and methyl palmitate as compounds that are produced by the tsetse fly Glossina morsitans and elicit strong behavioral responses. MPO evoked...