Nature

最新文章

• Direct radical functionalization of native sugars AI翻译
  作者：Jiang, Yi; Wei, Yi; Zhou, Qian-Yi; Sun, Guo-Quan; Fu, Xia-Ping; Levin, Nikita; Zhang, Yijun; Liu, Wen-Qiang; Song, Ningxi; Mohammed, Shabaz; Davis, Benjamin G.; Koh, Ming Joo
  作者单位：National University of Singapore; Rosalind Franklin Institute; University of Oxford; Southern University of Science & Technology; University of Oxford; University of Oxford
  摘要：Naturally occurring (native) sugars and carbohydrates contain numerous hydroxyl groups of similar reactivity 1,2 . Chemists, therefore, rely typically on laborious, multi-step protecting-group strategies 3 to convert these renewable feedstocks into reagents (glycosyl donors) to make glycans. The direct transformation of native sugars to complex saccharides remains a notable challenge. Here we describe a photoinduced approach to achieve site- and stereoselective chemical glycosylation from wide...
• Onset of coupled atmosphere-ocean oxygenation 2.3 billion years ago AI翻译
  作者：Ostrander, Chadlin M.; Heard, Andy W.; Shu, Yunchao; Bekker, Andrey; Poulton, Simon W.; Olesen, Kasper P.; Nielsen, Sune G.
  作者单位：Utah System of Higher Education; University of Utah; Woods Hole Oceanographic Institution; Woods Hole Oceanographic Institution; Woods Hole Oceanographic Institution; University of California System; University of California Riverside; University of Johannesburg; University of Leeds; University of Southern Denmark; Centre National de la Recherche Scientifique (CNRS); Universite de Lorraine
  摘要：The initial rise of molecular oxygen (O-2) shortly after the Archaean-Proterozoic transition 2.5 billion years ago was more complex than the single step-change once envisioned. Sulfur mass-independent fractionation records suggest that the rise of atmospheric O-2 was oscillatory, with multiple returns to an anoxic state until perhaps 2.2 billion years ago(1-3). Yet few constraints exist for contemporaneous marine oxygenation dynamics, precluding a holistic understanding of planetary oxygenatio...
• To explain sex, look to evolution AI翻译
  作者：Griffiths, Paul E.; Spencer, Hamish G.
  作者单位：University of Sydney; University of Otago
• Why I work to revive the Tasmanian tiger AI翻译
  作者：Simons, Margaret
  摘要：Andrew Pask develops genetic sequencing techniques for marsupials - including an apex predator that was hunted to death in the twentieth century.
• Fake jewellery from the Stone Age looks like the real deal AI翻译
  作者：[Anonymous]
  摘要：'Amber' beads dating to the Neolithic period, lasting from the fifth to the third millennium BC, are actually mollusc shells coated with resin and natural pigments.
• Fast-moving stars around an intermediate-mass black hole in ω Centauri AI翻译
  作者：Haeberle, Maximilian; Neumayer, Nadine; Seth, Anil; Bellini, Andrea; Libralato, Mattia; Baumgardt, Holger; Whitaker, Matthew; Dumont, Antoine; Alfaro-Cuello, Mayte; Anderson, Jay; Clontz, Callie; Kacharov, Nikolay; Kamann, Sebastian; Feldmeier-Krause, Anja; Milone, Antonino; Nitschai, Maria Selina; Pechetti, Renuka; van de Ven, Glenn
  作者单位：Max Planck Society; Utah System of Higher Education; University of Utah; Space Telescope Science Institute; Space Telescope Science Institute; University of Padua; Istituto Nazionale Astrofisica (INAF); University of Queensland; Universidad Central de Chile; Leibniz Association; Leibniz Institut fur Astrophysik Potsdam (AIP); Liverpool John Moores University; University of Vienna; University of Padua
  摘要：Black holes have been found over a wide range of masses, from stellar remnants with masses of 5-150 solar masses (M-circle dot), to those found at the centres of galaxies with M > 10(5)M(circle dot). However, only a few debated candidate black holes exist between 150M(circle dot) and 10(5)M(circle dot). Determining the population of these intermediate-mass black holes is an important step towards understanding supermassive black hole formation in the early universe(1,2). Several studies have c...
• Protect Antarctic ecosystems from growing tourism AI翻译
  作者：Luo, Yi; Zhong, Huan; Li, Chengjun; Sonne, Christian
  作者单位：Nanjing University; Guangzhou University; Aarhus University
  摘要：Letter to the Editor
• Mini saunas save endangered frogs from fungal disease AI翻译
  作者：Gratwicke, Brian; Savage, Anna
  作者单位：Smithsonian Institution; Smithsonian National Zoological Park & Conservation Biology Institute; State University System of Florida; University of Central Florida
  摘要：Amphibian species around the world are threatened with extinction by the deadly fungal disease chytridiomycosis. A simple, low-cost solution to provide warm conditions enables frogs to clear the infection and remain disease free.
• Flies use blood cells to take a deep breath AI翻译
  作者：Luschnig, Stefan
  作者单位：University of Munster
  摘要：Insect respiration is commonly thought to rely solely on direct gas exchange through air-filled tracheal tubes. The discovery of oxygen-transporting blood cells in fly larvae reveals a previously unknown way to oxygenate fly tissues.
• Vaccines save lives: how can uptake be increased? AI翻译
  作者：[Anonymous]
  摘要：Strategies for public engagement need to be rigorously tested around the world to maximize the potential of immunization.