6679期

最新文章

• The hottest year was even hotter than expected AI翻译
  作者：Voosen, Paul
• Global shark fishing mortality still rising despite widespread regulatory change AI翻译
  作者：Worm, Boris; Orofino, Sara; Burns, Echelle S.; D'Costa, Nidhi G.; Feitosa, Leonardo Manir; Palomares, Maria L. D.; Schiller, Laurenne; Bradley, Darcy
  作者单位：Dalhousie University; University of California System; University of California Santa Barbara; University of California System; University of California Santa Barbara; University of California System; University of California Santa Barbara; University of British Columbia; Carleton University; Nature Conservancy
  摘要：Over the past two decades, sharks have been increasingly recognized among the world's most threatened wildlife and hence have received heightened scientific and regulatory scrutiny. Yet, the effect of protective regulations on shark fishing mortality has not been evaluated at a global scale. Here we estimate that total fishing mortality increased from at least 76 to 80 million sharks between 2012 and 2019, similar to 25 million of which were threatened species. Mortality increased by 4% in coa...
• Synthetic dioxygenase reactivity by pairing electrochemical oxygen reduction and water oxidation AI翻译
  作者：Hoque, Md. Asmaul; Gerken, James B.; Stahl, Shannon S.
  作者单位：University of Wisconsin System; University of Wisconsin Madison
  摘要：The reactivity of molecular oxygen is crucial to clean energy technologies and green chemical synthesis, but kinetic barriers complicate both applications. In synthesis, dioxygen should be able to undergo oxygen atom transfer to two organic molecules with perfect atom economy, but such reactivity is rare. Monooxygenase enzymes commonly reductively activate dioxygen by sacrificing one of the oxygen atoms to generate a more reactive oxidant. Here, we used a manganese-tetraphenylporphyrin catalys...
• Good governance can save China's mine ecosystems AI翻译
  作者：Ma, Wei-Bo; Li, Hai-Dong; Lei, Shao-Gang; Xu, Xiang-Hua; Xue, Sheng-Guo
  作者单位：Nanjing Institute of Environmental Sciences, Ministry of Ecology & Environment; China University of Mining & Technology; Nanjing University of Information Science & Technology; Central South University
• Tectonic plate under Tibet may be splitting in two AI翻译
  作者：Wei-Haas, Maya
• Portugal's farmland bird crisis requires action AI翻译
  作者：Silva, Joo P.; Gameiro, Joo; Valerio, Francesco; Marques, Ana T.
  作者单位：Universidade do Porto; Universidade de Lisboa; University of Evora
• RUR and the Vision of Artificial Life AI翻译
  作者：Finn, Ed
  作者单位：Arizona State University; Arizona State University-Tempe
• Pathways toward commercial perovskite/silicon tandem photovoltaics AI翻译
  作者：Aydin, Erkan; Allen, Thomas G.; De Bastiani, Michele; Razzaq, Arsalan; Xu, Lujia; Ugur, Esma; Liu, Jiang; De Wolf, Stefaan
  作者单位：King Abdullah University of Science & Technology; Swiss Center for Electronics & Microtechnology (CSEM); Soochow University - China
  摘要：Perovskite/silicon tandem solar cells offer a promising route to increase the power conversion efficiency of crystalline silicon (c-Si) solar cells beyond the theoretical single-junction limitations at an affordable cost. In the past decade, progress has been made toward the fabrication of highly efficient laboratory-scale tandems through a range of vacuum- and solution-based perovskite processing technologies onto various types of c-Si bottom cells. However, to become a commercial reality, th...
• Mauna Kea slim-down begins AI翻译
  作者：Brainard, Jeffrey
• Radio circles linked to gas blasts AI翻译
  作者：Brainard, Jeffrey