6764期

最新文章

• Tariffs imperil US-Canada precision agriculture AI翻译
  作者：Biswas, Asim
  作者单位：University of Guelph
• Vote by Dutch lawmakers threatens major primate research center AI翻译
  作者：Enserink, Martin
• Evolution of thumbnails across Rodentia AI翻译
  作者：Missagia, Rafaela V.; Feijo, Anderson; Johnson, Lauren; Allen, Maximilian L.; Patterson, Bruce D.; Jenkins, Paulina D.; Shepherd, Gordon M. G.
  作者单位：Universidade de Sao Paulo; Field Museum of Natural History (Chicago); Chinese Academy of Sciences; Institute of Zoology, CAS; Field Museum of Natural History (Chicago); University of Illinois System; Illinois Natural History Survey; University of Illinois Urbana-Champaign; Natural History Museum London; Northwestern University
  摘要：The unguis (hoof, claw, or nail) of the first digit (D1, also known as the thumb or pollex) of the tetrapod hand exhibits numerous functional adaptations, but its macroevolutionary association with ecological diversity is unknown. Across Rodentia, we find that most extant genera and ancestral lineages bear D1 nails. Exceptions follow structure-function associations that arose independently multiple times, specifically, the gain of D1 claws with subterranean habits and the loss of D1 ungues wit...
• Carcinogenic metal detected in air after LA fires AI翻译
  作者：Cornwall, Warren
• India tests new tools to predict local monsoon floods AI翻译
  作者：Chandrashekhar, Vaishnavi
• Burkina Faso halts plan to fight malaria with transgenic mosquitoes AI翻译
  作者：Kupferschmidt, Kai
• Patriarchy Inc.: What We Get Wrong About Gender Equality-and Why Men Still Win at Work AI翻译
  作者：Ruppanner, Leah
  作者单位：University of Melbourne; University of Melbourne
• Spin-selective transport through chiral ferromagnetic nanohelices AI翻译
  作者：Jeon, Yoo Sang; Jeong, Eunjin; Im, Sang Won; Ko, Min Jun; Lee, Jin Seo; Moon, Jun Hwan; Lee, Min Hyeok; Lee, Jeong Kyu; Yoo, Sung Jong; Nam, Ki Tae; Kim, Young Keun
  作者单位：Korea University; Korea University; Seoul National University (SNU); Northwestern University; Feinberg School of Medicine; Korea University; Korea Institute of Science & Technology (KIST)
  摘要：Chiral crystals with well-defined handedness in atomic arrangements exhibit properties such as spin selectivity, asymmetric magnetoresistance, and skyrmions. Although similar geometry-induced phenomena in chiral organic molecule-based systems were observed, synthesizing uniform inorganic nanostructures with desired chirality using a scalable method remains challenging. We electrochemically synthesized chiral ferromagnetic cobalt-iron nanohelices from nanoparticles in anodized aluminum oxide te...
• Can the global drone revolution make agriculture more sustainable? AI翻译
  作者：Belton, Ben; Baldiga, Leo; Justice, Scott; Minten, Bart; Narayanan, Sudha; Reardon, Thomas
  作者单位：Michigan State University; Michigan State University; CGIAR; International Food Policy Research Institute (IFPRI); CGIAR; International Food Policy Research Institute (IFPRI)
• Photochemical H2 dissociation for nearly quantitative CO2 reduction to ethylene AI翻译
  作者：Jin, Ping; Guo, Pu; Luo, Nengchao; Zhang, Hui; Ni, Chenwei; Chen, Ruotian; Liu, Wei; Li, Rengui; Xiao, Jianping; Wang, Guoxiong; Zhang, Fuxiang; Fornasiero, Paolo; Wang, Feng
  作者单位：Chinese Academy of Sciences; Dalian Institute of Chemical Physics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; Shanghai Advanced Research Institute, CAS; Chinese Academy of Sciences; Shanghai Institute of Microsystem & Information Technology, CAS; Fudan University; University of Trieste; University of Trieste; Consiglio Nazionale delle Ricerche (CNR); Isituto di Chimica dei Composti Organometallici (ICCOM-CNR)
  摘要：Producing olefins by carbon dioxide (CO2) hydrogenation is a long-standing goal. The usual products are multicarbon mixtures because the critical step of heterolytic hydrogen (H-2) dissociation at high temperatures complicates selectivity control. In this study, we report that irradiating gold-titanium dioxide at 365 nanometers induces heterolytic H-2 dissociation at ambient temperature. This process likely relies on interfacial electric dipoles from photogenerated electrons and holes situated...