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作者：Li, Hui-quan; Jiang, Wuji; Ling, Li; Pratelli, Marta; Chen, Cong; Gupta, Vaidehi; Godavarthi, Swetha K.; Spitzer, Nicholas C.
作者单位：University of California System; University of California San Diego; University of California System; University of California San Diego; University of California System; University of California San Diego; University of California System; University of California San Diego
摘要：Overgeneralization of fear to harmless situations is a core feature of anxiety disorders resulting from acute stress, yet the mechanisms by which fear becomes generalized are poorly understood. In this study, we show that generalized fear in mice results from a transmitter switch from glutamate to gamma-aminobutyric acid (GABA) in serotonergic neurons of the lateral wings of the dorsal raphe. Similar change in transmitter identity was found in the postmortem brains of individuals with posttrau...
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作者：Thakur, Anupma; Anasori, Babak
作者单位：Purdue University System; Purdue University; Purdue University System; Purdue University; Purdue University in Indianapolis
摘要：A large-scale theory-driven approach predicts many new 2D materials
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作者：Froese, Robert D.; Arriola, Daniel J.; den Doelder, Jaap; Hou, Jianbo; Kashyap, Teresita; Lu, Keran; Martinetti, Luca; Stubbert, Bryan D.
作者单位：Dow Chemical Company; Dow Chemical Company
摘要：In polyolefins, long-chain branching is introduced through an energy-intensive, high-pressure radical process to form low-density polyethylene (LDPE). In the current work, we demonstrated a ladder-like polyethylene architecture through solution polymerization of ethylene and less than 1 mole % of alpha,omega-dienes, using a dual-chain catalyst. The ladder-branching mechanism requires catalysts with two growing polymer chains on the same metal center, thus enchaining the diene without the requi...
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作者：Brainard, Jeffrey
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作者：Brainard, Jeffrey
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作者：Cohen, Jon
摘要：Jeanne Marrazzo, an HIV prevention researcher, sees need for more holistic approach to community health problems
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作者：Brechot, Christian; Bjorndal, Asa Szekely; Ewbank, Jonathan
作者单位：State University System of Florida; University of South Florida; Public Health Agency of Sweden; Institut National de la Sante et de la Recherche Medicale (Inserm)
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作者：Liu, Jiale; Chen, Xiayan; Chen, Kaizhong; Tian, Wenming; Sheng, Yusong; She, Bin; Jiang, Youyu; Zhang, Deyi; Liu, Yang; Qi, Jianhang; Chen, Kai; Ma, Yongmin; Qiu, Zexiong; Wang, Chaoyang; Yin, Yanfeng; Zhao, Shengli; Leng, Jing; Jin, Shengye; Zhao, Wenshan; Qin, Yanyang; Su, Yaqiong; Li, Xiaoyu; Li, Xiaojiang; Zhou, Yang; Zhou, Yinhua; Ling, Furi; Mei, Anyi; Han, Hongwei
作者单位：Huazhong University of Science & Technology; Wuhan Institute of Technology; Chinese Academy of Sciences; Dalian Institute of Chemical Physics, CAS; Xi'an Jiaotong University
摘要：Printable mesoscopic perovskite solar cells (p-MPSCs) do not require the added hole-transport layer needed in traditional p-n junctions but have also exhibited lower power conversion efficiencies of about 19%. We performed device simulation and carrier dynamics analysis to design a p-MPSC with mesoporous layers of semiconducting titanium dioxide, insulating zirconium dioxide, and conducting carbon infiltrated with perovskite that enabled three-dimensional injection of photoexcited electrons in...
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作者：Hen, Rene; Schacher, Samuel
作者单位：Columbia University; Columbia University; New York State Psychiatry Institute
摘要：Fear is essential for survival, but its generalization to nondangerous environments can be harmful. Fear generalization occurs in many stress and trauma disorders, including posttraumatic stress disorder (PTSD); yet, the mechanisms by which fear is generalized remain unclear. On page 1252 of this issue, Li et al. ( 1 ) report that in mice, generalized fear induced by acute stress results from a switch in the neurotransmitters released by a subpopulation of neurons in a specific area of the bra...
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作者：Else, Holly
摘要：Investor pledges $1 million for science whistleblowers Investor pledges $1 million for science whistleblowers
