6676期

最新文章

• A challenging move AI翻译
  作者：Beckert, Adrian
  作者单位：California Institute of Technology
• Their budget bursting, US particle physicists dream small AI翻译
  作者：Cho, Adrian
  摘要：New effort to study big bang afterglow heads to-do list
• An observed population of intermediate-mass helium stars that have been stripped in binaries AI翻译
  作者：Drout, M. R.; Gotberg, Y.; Ludwig, B. A.; Groh, J. H.; de Mink, S. E.; O'Grady, A. J. G.; Smith, N.
  作者单位：University of Toronto; Carnegie Institution for Science; Max Planck Society; University of Amsterdam; University of Toronto; University of Arizona
  摘要：The hydrogen-rich outer layers of massive stars can be removed by interactions with a binary companion. Theoretical models predict that this stripping produces a population of hot helium stars of -2 to 8 solar masses (M), however, only one such system has been identified thus far. We used ultraviolet photometry to identify potential stripped helium stars then investigated 25 of them using optical spectroscopy. We identified stars with high temperatures (-60,000 to 100,000 kelvin), high surface...
• Putting Ourselves Back in the Equation AI翻译
  作者：Firestone, Chaz; Phillips, Ian
  作者单位：Johns Hopkins University; Johns Hopkins University
• Self-sustaining personal all-day thermoregulatory clothing using only sunlight AI翻译
  作者：Wang, Ziyuan; Bo, Yiwen; Bai, Peijia; Zhang, Shuchao; Li, Guanghui; Wan, Xiangjian; Liu, Yongsheng; Ma, Rujun; Chen, Yongsheng
  作者单位：Nankai University; Nankai University; Nankai University; Nankai University
  摘要：The human body must stay within a certain temperature range for comfort and safety. However, challenges for thermoregulatory clothing exist for harsh application scenarios, such as full day/night cycles, frigid polar regions, and space travel. We developed a flexible and sustainable personal thermoregulatory clothing system by integrating a flexible organic photovoltaic (OPV) module to directly acquire energy from sunlight and bidirectional electrocaloric (EC) devices. The flexible OPV-EC ther...
• Coral reefs in peril in a record-breaking year AI翻译
  作者：Hoegh-Guldberg, Ove; Skirving, William; Dove, Sophie G.; Spady, Blake L.; Norrie, Andrew; Geiger, Erick F.; Liu, Gang; De La Cour, Jacqueline L.; Manzello, Derek P.
  作者单位：University of Queensland; National Oceanic Atmospheric Admin (NOAA) - USA; James Cook University; University System of Maryland; University of Maryland College Park; University System of Maryland; University of Maryland College Park
• Third Pole needs more than legal protection AI翻译
  作者：Liu, Haimeng; Chen, Hao
  作者单位：Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS
• The drivers of massive star evolution AI翻译
  作者：Sundqvist, Jon; Sana, Hugues
  作者单位：KU Leuven
  摘要：An elusive population of stripped binary stars is finally revealed
• Light-gated channelrhodopsin sparks proton-induced calcium release in guard cells AI翻译
  作者：Huang, Shouguang; Shen, Like; Roelfsema, M. Rob G.; Becker, Dirk; Hedrich, Rainer
  作者单位：University of Wurzburg; Nanjing Agricultural University
  摘要：Although there has been long-standing recognition that stimuli-induced cytosolic pH alterations coincide with changes in calcium ion (Ca2+) levels, the interdependence between protons (H+) and Ca2+ remains poorly understood. We addressed this topic using the light-gated channelrhodopsin HcKCR2 from the pseudofungus Hyphochytrium catenoides, which operates as a H+ conductive, Ca2+ impermeable ion channel on the plasma membrane of plant cells. Light activation of HcKCR2 in Arabidopsis guard cell...
• The history of Coast Salish woolly dogs revealed by ancient genomics and Indigenous Knowledge AI翻译
  作者：Lin, Audrey T.; Hammond-Kaarremaa, Liz; Liu, Hsiao-Lei; Stantis, Chris; McKechnie, Iain; Pavel, Michael; Pavel, Susan Sa'hLa MitSa; Wyss, Senaqwila Senakw; Sparrow, Debra Qwasen; Carr, Karen; Aninta, Sabhrina Gita; Perri, Angela; Hartt, Jonathan; Bergstroem, Anders; Carmagnini, Alberto; Charlton, Sophy; Dalen, Love; Feuerborn, Tatiana R.; France, Christine A. M.; Gopalakrishnan, Shyam; Grimes, Vaughan; Harris, Alex; Kavich, Gwenaelle; Sacks, Benjamin N.; Sinding, Mikkel-Holger S.; Skoglund, Pontus; Stanton, David W. G.; Ostrander, Elaine A.; Larson, Greger; Armstrong, Chelsey G.; Frantz, Laurent A. F.; Hawkins, Melissa T. R.; Kistler, Logan
  作者单位：Smithsonian Institution; Smithsonian National Museum of Natural History; American Museum of Natural History (AMNH); Vancouver Island University; Utah System of Higher Education; University of Utah; University of Victoria; University of London; Queen Mary University London; Texas A&M University System; Texas A&M University College Station; Simon Fraser University; Francis Crick Institute; University of East Anglia; University of Munich; University of Oxford; University of York - UK; Swedish Museum of Natural History; Stockholm University; Swedish Museum of Natural History; University of Copenhagen; National Institutes of Health (NIH) - USA; NIH National Human Genome Research Institute (NHGRI); Smithsonian Institution; Memorial University Newfoundland; University of California System; University of California Davis; University of California System; University of California Davis; University of Copenhagen; Cardiff University; Smithsonian Institution; Smithsonian National Museum of Natural History
  摘要：Ancestral Coast Salish societies in the Pacific Northwest kept long-haired woolly dogs that were bred and cared for over millennia. However, the dog wool-weaving tradition declined during the 19th century, and the population was lost. In this study, we analyzed genomic and isotopic data from a preserved woolly dog pelt from Mutton, collected in 1859. Mutton is the only known example of an Indigenous North American dog with dominant precolonial ancestry postdating the onset of settler coloniali...