Science

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• Risks of China's increased forest area AI翻译
  作者：Niu, Yujie; Squires, Victor; Jentsch, Anke
  作者单位：University of Bayreuth; Gansu Agricultural University; University of Adelaide
• Pot residues show how ancient Egyptians made a mummy Analysis reveals the chemicals applied to corpses in a 2700-year-old mummification workshop AI翻译
  作者：Curry, Andrew
  摘要：found in an ancient Egyptian mummification workshop, the researchers were able to show the process involved complex chemistry and exotic ingredients, including resins sourced from a continent away. ???You can actually look into the vessels and see what???s still inside,??? says Barbara Huber, an archaeological scientist at the who was not involved with the research. The new evidence emerged from a complex south of Cairo called Saqqara. In 2016, University of T??b ingen archaeologist Ramadan Hu...
• Asymmetric counteranion-directed photoredox catalysis AI翻译
  作者：Das, Sayantani; Zhu, Chendan; Demirbas, Derya; Bill, Eckhard; De, Chandra Kanta; List, Benjamin
  作者单位：Max Planck Society; Max Planck Society
  摘要：Photoredox catalysis enables distinctive and broadly applicable chemical reactions, but controlling their selectivity has proven to be difficult. The pursuit of enantioselectivity is a particularly daunting challenge, arguably because of the high energy of the activated radical (ion) intermediates, and previous approaches have invariably required pairing of the photoredox catalytic cycle with an additional activation mode for asymmetric induction. A potential solution for photoredox reactions ...
• As some postdocs' pay rises, funding fears grow Salary mandates in California and Washington leave many lab heads scrambling AI翻译
  作者：Langin, Katie
• Reports of Long Covid wane AI翻译
  作者：[Anonymous]
• NIH oversight of EcoHealth grant rapped AI翻译
  作者：Brainard, Jeffrey
  摘要：A federal watchdog has found the U.S. National Institutes of Health (NIH) did not properly oversee a grant to the EcoHealth Alliance, a New York City-based nonprofit that funded work at the Wuhan Institute of Virology (WIV) in China. In 2020, then-President Donald Trump claimed SARS-CoV-2 could have come from the WIV lab, an idea that many scientists continue to say lacks evidence. Soon after, NIH terminated the EcoHealth grant, which had provided $600,000 to WIV. The 18-month-long audit by th...
• Suppressing feedback signals to visual cortex abolishes attentional modulation AI翻译
  作者：Debes, Samantha R.; Dragoi, Valentin
  作者单位：University of Texas System; University of Texas Health Science Center Houston; Rice University
  摘要：Attention improves perception by enhancing the neural encoding of sensory information. A long-standing hypothesis is that cortical feedback projections carry top-down signals to influence sensory coding. However, this hypothesis has never been tested to establish causal links. We used viral tools to label feedback connections from cortical area V4 targeting early visual cortex (area V1). While monkeys performed a visual-spatial attention task, inactivating feedback axonal terminals in V1 witho...
• Neanderthals lived in groups big enough to eat giant elephants Meat from the butchered beasts would have fed hundreds AI翻译
  作者：Curry, Andrew
• Arid lands, imperial ambitions Desert knowledge exchange cloaked imperial goals, argues a political geographer AI翻译
  作者：Karimi, Pamela
• Revolt against educational rankings AI翻译
  作者：Thorp, H. Holden
  作者单位：Washington University (WUSTL); Washington University (WUSTL)