6800期

最新文章

• An appetite for protein AI翻译
  作者：Simpson, Stephen J.; Raubenheimer, David
  作者单位：University of Sydney; University of Sydney
• FERONIA orchestrates plasma membrane nanoclusters for plant thermotolerance AI翻译
  作者：Wang, Kun; Yan, Hanqi; Guo, Xin; Lin, Qihong; Li, Jing; Peng, Aoyang; Fu, Ying; Gong, Zhizhong; Yang, Shuhua; Ding, Yanglin
  作者单位：China Agricultural University; China Agricultural University; China Agricultural University; Hebei University
• Chile's regulatory rollback harms biosphere AI翻译
  作者：Navedo, Juan G.; Benitez, Hugo A.; Dorador, Cristina; Vargas-Chacoff, Luis
  作者单位：Universidad Austral de Chile; Universidad de Extremadura; Universidad Andres Bello; Universidad de Antofagasta; Universidad de Antofagasta; Universidad Austral de Chile
• Reward magnitude determines reinforcement learning efficiency AI翻译
  作者：Gong, Sheng; Martell, Alyssa; Dudman, Joshua T.; Coddington, Luke T.
  作者单位：Howard Hughes Medical Institute
  摘要：INTRODUCTION Across different disciplines that share an interest in learning, from artifical intelligence (AI) to experimental psychology, it has long been assumed that there is a free parameter, the learning rate, that determines individual variance in learning efficiency and is relatively independent of the magnitude of reward. This suggests that learning depends primarily on the amount of experience (number of rewards). However, recent theoretical work mapping dopamine (DA) function onto re...
• Complex interplay of neuronal and hormonal gut-brain responses to essential amino acid deficit AI翻译
  作者：Kim, Boram; Lee, Seongju; Bae, Hyeyeon; Kim, Shinhye; Won, Jong-Hoon; Kim, Dongwoo; Jung, Byungkwon; Kanai, Makoto I.; Yoon, Sung-Eun; Oh, Yangkyun; Lee, Won-Jae; Suh, Greg S. B.
  作者单位：Korea Advanced Institute of Science & Technology (KAIST); Institute for Basic Science - Korea (IBS); Gwangju Institute of Science & Technology (GIST); New York University; Gwangju Institute of Science & Technology (GIST); Ewha Womans University; Seoul National University (SNU); Gwangju Institute of Science & Technology (GIST); Osaka Metropolitan University
  摘要：A deficit in dietary protein elicits a nutrient-specific appetite, yet the underlying mechanisms remain poorly understood. In this work, we identify coordinated neuronal and systemic mechanisms in Drosophila that drive an essential amino acid (EAA)-specific appetite. EAA deprivation increases neuropeptide CNMamide (CNMa) expression in gut enterocytes, activating enteric neurons and ellipsoid body neurons in the brain to promote EAA intake through two complementary pathways: a rapid neuronal gu...
• Biogeographic processes underlying global patterns of plant diversity AI翻译
  作者：Daru, Barnabas H.; Nichodemus, Cornelius O.; Henao-Diaz, L. Francisco
  作者单位：Stanford University; University of Maine System; University of Maine Orono; University of Chicago
  摘要：The uneven global distribution of plant diversity remains a fundamental question in biogeography. Using dated phylogenies of >300,000 plant species and ancestral biogeographical stochastic mapping, we show that in situ speciation is the predominant process underlying extant plant diversity and accounts for 78% of biogeographic events across realms. The Neotropic contributed 37% of in situ speciation, likely owing to its role as a center of species diversification. Dispersal between realms was ...
• Scientists play catch-up to startling Ebola outbreak AI翻译
  作者：Kupferschmidt, Kai
  摘要：Testing, sequencing, and clinical trial efforts spring to life as Bundibugyo virus spreads
• Progression without progress AI翻译
  作者：Ottino, Julio M.; Uzzi, Brian
  作者单位：Northwestern University; Northwestern University; Northwestern University; Northwestern University
• A student takes on Stanford (and the world) AI翻译
  作者：Thompson, Valerie
• Chile's environmental policy at risk AI翻译
  作者：Duran, America Paz; Espinoza-Galdames, Ariel; Caro, Victor; Manuschevich, Daniela
  作者单位：Universidad de Santiago de Chile; Universidad de Chile