2024

最新文章

• THE CORAL CHRONICLES AI翻译
  作者：Voosen, Paul
  摘要：On a remote Pacific island, clues to El Nino's future are preserved in ancient reefs
• Plastics that lose their temper on demand AI翻译
  作者：McAllister, Haley P.; Kalow, Julia A.
  作者单位：Northwestern University
  摘要：Multiple properties can be programmed into a single dynamic material by using heat
• WHO OKs low-cost COVID-19 shot AI翻译
  作者：Brainard, Jeffrey
• Protect peatlands to achieve climate goals AI翻译
  作者：Girkin, Nicholas T.; Davidson, Scott J.
  作者单位：University of Nottingham; University of Plymouth
• NextGen Voices: Benefits of Research Success AI翻译
  作者：[Anonymous]
• To infinity and beyond AI翻译
  作者：Frappier, Melanie
  摘要：A physicist's wild romp through the multiverse probes space-time, string theory, and everything in between
• Accessing pluripotent materials through tempering of dynamic covalent polymer networks AI翻译
  作者：Boynton, Nicholas R.; Dennis, Joseph M.; Dolinski, Neil D.; Lindberg, Charlie A.; Kotula, Anthony P.; Grocke, Garrett L.; Vivod, Stephanie L.; Lenhart, Joseph L.; Patel, Shrayesh N.; Rowan, Stuart J.
  作者单位：University of Chicago; National Institute of Standards & Technology (NIST) - USA; National Aeronautics & Space Administration (NASA); NASA Glenn Research Center; United States Department of Energy (DOE); Argonne National Laboratory; University of Chicago
  摘要：Pluripotency, which is defined as a system not fixed as to its developmental potentialities, is typically associated with biology and stem cells. Inspired by this concept, we report synthetic polymers that act as a single pluripotent feedstock and can be differentiated into a range of materials that exhibit different mechanical properties, from hard and brittle to soft and extensible. To achieve this, we have exploited dynamic covalent networks that contain labile, dynamic thia-Michael bonds, ...
• Envisioning a radical future AI翻译
  作者：Ray, Victor
  作者单位：University of Iowa; University of Iowa; Harvard University
  摘要：A more inclusive society begins with imagining audacious alternatives to today's systems, argues a sociologist
• Structural basis for sugar perception by Drosophila gustatory receptors AI翻译
  作者：Ma, Demin; Hu, Meiqin; Yang, Xiaotong; Liu, Qiang; Ye, Fan; Cai, Weijie; Wang, Yong; Xu, Ximing; Chang, Shenghai; Wang, Ruiying; Yang, Wei; Ye, Sheng; Su, Nannan; Fan, Minrui; Xu, Haoxing; Guo, Jiangtao
  作者单位：Zhejiang University; Zhejiang University; Zhejiang University; Zhejiang University; Liangzhu Laboratory; Zhejiang University; Zhejiang University; Zhejiang University; Ocean University of China; Zhejiang University; Chinese Academy of Sciences; Center for Excellence in Molecular Plant Sciences, CAS; Zhejiang University; Tianjin University; Zhejiang University; University of Michigan System; University of Michigan; Zhejiang University; Zhejiang University; Zhejiang University
  摘要：Insects rely on a family of seven transmembrane proteins called gustatory receptors (GRs) to encode different taste modalities, such as sweet and bitter. We report structures of Drosophila sweet taste receptors GR43a and GR64a in the apo and sugar-bound states. Both GRs form tetrameric sugar-gated cation channels composed of one central pore domain (PD) and four peripheral ligand-binding domains (LBDs). Whereas GR43a is specifically activated by the monosaccharide fructose that binds to a narr...
• Total organic carbon measurements reveal major gaps in petrochemical emissions reporting AI翻译
  作者：He, Megan; Ditto, Jenna C.; Gardner, Lexie; Machesky, Jo; Hass-Mitchell, Tori N.; Chen, Christina; Khare, Peeyush; Sahin, Bugra; Fortner, John D.; Plata, Desiree L.; Drollette, Brian D.; Hayden, Katherine L.; Wentzell, Jeremy J. B.; Mittermeier, Richard L.; Leithead, Amy; Lee, Patrick; Darlington, Andrea; Wren, Sumi N.; Zhang, Junhua; Wolde, Mengistu; Moussa, Samar G.; Li, Shao-Meng; Liggio, John; Gentner, Drew R.
  作者单位：Yale University; Environment & Climate Change Canada; National Research Council Canada; Peking University; Harvard University; Washington University (WUSTL); Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; Massachusetts Institute of Technology (MIT)
  摘要：Anthropogenic organic carbon emissions reporting has been largely limited to subsets of chemically speciated volatile organic compounds. However, new aircraft-based measurements revealed total gas-phase organic carbon emissions that exceed oil sands industry-reported values by 1900% to over 6300%, the bulk of which was due to unaccounted-for intermediate-volatility and semivolatile organic compounds. Measured facility-wide emissions represented approximately 1% of extracted petroleum, resultin...