Science

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• Stop elephant hunting in Tanzania borderlands AI翻译
  作者：Poole, Joyce; Dobson, Andrew; Bonham, Richard; Pope, Frank; Fishlock, Vicki; Goodall, Jane; Granli, Petter; Ihwagi, Festus; Kaelo, Dickson ole; Kahumbu, Paula; Kiiru, Winnie; Lee, Phyllis; Lindsay, Keith; Moss, Cynthia; Hamisi, Seif Mutinda; Njiraini, Norah; Nowak, Katarzyna; Ogutu, Joseph O.; Ojwang, Gordon; Okello, Moses; Poole-Granli, Selengei; Sayiale, Catherine; Wamithi, Michael; Waruingi, Lucy
  作者单位：Princeton University; University of Warsaw; University Hohenheim; University of Groningen
• My weekly reset AI翻译
  作者：Hibbing, Paul
  作者单位：University of Illinois System; University of Illinois Chicago; University of Illinois Chicago Hospital
• Court clears Kansas scientist AI翻译
  作者：Brainard, Jeffrey
• Scientists at odds over wild plans to slow melting glaciers AI翻译
  作者：Richter, Hannah
• Periodic cytokinin responses in Lotus japonicus rhizobium infection and nodule development AI翻译
  作者：Soyano, Takashi; Akamatsu, Akira; Takeda, Naoya; Watahiki, Masaaki K.; Goh, Tatsuaki; Okuma, Nao; Suganuma, Norio; Kojima, Mikiko; Takebayashi, Yumiko; Sakakibara, Hitoshi; Nakajima, Keiji; Kawaguchi, Masayoshi
  作者单位：National Institutes of Natural Sciences (NINS) - Japan; National Institute for Basic Biology (NIBB); Graduate University for Advanced Studies - Japan; Kwansei Gakuin University; Hokkaido University; Nara Institute of Science & Technology; Aichi University Education; RIKEN; Nagoya University; RIKEN
  摘要：Host plants benefit from legume root nodule symbiosis with nitrogen-fixing bacteria under nitrogen-limiting conditions. In this interaction, the hosts must regulate nodule numbers and distribution patterns to control the degree of symbiosis and maintain root growth functions. The host response to symbiotic bacteria occurs discontinuously but repeatedly at the region behind the tip of the growing roots. Here, live-imaging and transcriptome analyses revealed oscillating host gene expression with...
• Dengue's economic impact in Brazil AI翻译
  作者：Vancini, Rodrigo L.; Andrade, Marilia S.; de Lira, Claudio A. B.
  作者单位：Universidade Federal do Espirito Santo; Universidade Federal de Sao Paulo (UNIFESP); Universidade Federal de Goias
• Defective TiOx overlayers catalyze propane dehydrogenation promoted by base metals AI翻译
  作者：Chen, Sai; Xu, Yiyi; Chang, Xin; Pan, Yue; Sun, Guodong; Wang, Xianhui; Fu, Donglong; Pei, Chunlei; Zhao, Zhi-Jian; Su, Dong; Gong, Jinlong
  作者单位：Tianjin University; Collaborative Innovation Center of Chemical Science & Engineering Tianjin; Tianjin University; TJU-NUS Joint Institute; Chinese Academy of Sciences; Institute of Physics, CAS; Nankai University; Haihe Laboratory of Sustainable Chemical Transformations; Tianjin University
  摘要：The industrial catalysts utilized for propane dehydrogenation (PDH) to propylene, an important alternative to petroleum-based cracking processes, either use expensive metals or metal oxides that are environmentally unbenign. We report that a typically less-active oxide, titanium oxide (TiO2), can be combined with earth-abundant metallic nickel (Ni) to form an unconventional Ni@TiOx catalyst for efficient PDH. The catalyst demonstrates a 94% propylene selectivity at 40% propane conversion and s...
• Oldest human genome comes from a Denisovan AI翻译
  作者：Gibbons, Ann
• The benefits of GLP-1 drugs beyond obesity AI翻译
  作者：Drucker, Daniel J.
  作者单位：University of Toronto; Sinai Health System Toronto; Lunenfeld Tanenbaum Research Institute; University of Toronto
  摘要：Glucagon-like peptide-1 (GLP-1) is secreted from gut endocrine cells in response to food ingestion and acts as an incretin hormone to potentiate glucose-dependent insulin secretion. Pharmacological GLP-1 receptor (GLP- 1R) activation reduced glucagon secretion (which raises blood glucose) and gastric emptying, leading to the development of GLP-1 therapies for the treatment of type 2 diabetes (T2D). GLP-1R is expressed on several pancreatic islet cell types and within multiple regions of the ce...
• Go/no-go for a Mars samples return AI翻译
  作者：Southwood, David
  作者单位：Imperial College London; European Space Agency
  摘要：Last month's return to Earth of China's lunar lander Chang'e-6 with samples from the far side of the Moon is a reminder that there are firsts in robotic space exploration still to be achieved. Unfortunately, this year has seen a major setback for the prospects of an even more extensive plan to collect samples from Mars. In April, the US National Aeronautics and Space Administration (NASA) made clear that the ballooning cost for the US Mars Sample Return mission to around $11 billion was too mu...