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作者：Briscoe, Adriana D.
作者单位：University of California System; University of California Irvine
摘要：A gene for mate preference has been shared between hybridizing butterfly species
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作者：Brainard, Jeffrey
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作者：Neumann, S. Ephraim; Kwon, Junpyo; Gropp, Cornelius; Ma, Le; Giovine, Raynald; Ma, Tianqiong; Hanikel, Nikita; Wang, Kaiyu; Chen, Tiffany; Jagani, Shaan; Ritchie, Robert O.; Xu, Ting; Yaghi, Omar M.
作者单位：University of California System; University of California Berkeley; University of California System; University of California Berkeley; United States Department of Energy (DOE); Lawrence Berkeley National Laboratory; University of California System; University of California Berkeley; University of California System; University of California Berkeley
摘要：The introduction of molecularly woven three-dimensional (3D) covalent organic framework (COF) crystals into polymers of varying types invokes different forms of contact between filler and polymer. Whereas the combination of woven COFs with amorphous and brittle polymethyl methacrylate results in surface interactions, the use of the liquid-crystalline polymer polyimide induces the formation of polymer-COF junctions. These junctions are generated by the threading of polymer chains through the po...
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作者：Kumari, Priyanka; Basnet, Bijaya; Lavrentovich, Maxim O.; Lavrentovich, Oleg D.
作者单位：University System of Ohio; Kent State University; Kent State University Kent; Kent State University Salem; University System of Ohio; Kent State University; Kent State University Salem; Kent State University Kent; Massachusetts System of Public Higher Education; Worcester State University; University of Tennessee System; University of Tennessee Knoxville; University System of Ohio; Kent State University; Kent State University Salem; Kent State University Kent
摘要：Ferroelectric nematic liquid crystals are formed by achiral molecules with large dipole moments. Theirthree-dimensional orientational order is described as unidirectionally polar. We demonstrate thatthe ground state of a flat slab of a ferroelectric nematic unconstrained by externally imposedalignment directions is chiral, with left- and right-handed twists of polarization. Although the helicoidaldeformations and defect walls that separate domains of opposite handedness increase the elasticene...
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作者：Larsen, Ashley E.; Noack, Frederik; Powers, L. Claire
作者单位：University of California System; University of California Santa Barbara; University of British Columbia; University of Colorado System; University of Colorado Boulder
摘要：The environmental impacts of organic agriculture are only partially understood and whether such practices have spillover effects on pests or pest control activity in nearby fields remains unknown. Using about 14,000 field observations per year from 2013 to 2019 in Kern County, California, we postulate that organic crop producers benefit from surrounding organic fields decreasing overall pesticide use and, specifically, pesticides targeting insect pests. Conventional fields, by contrast, tend t...
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作者：Zhang, Ke; Cao, Ang; Wandall, Lau Halkier; Vernieres, Jerome; Kibsgaard, Jakob; Norskov, Jens K.; Chorkendorff, Ib
作者单位：Technical University of Denmark
摘要：Over the past two decades, there has been growing interest in developing catalysts to enable Haber-Bosch ammonia synthesis under milder conditions than currently pertain. Rational catalyst design requires theoretical guidance and clear mechanistic understanding. Recently, a spin-mediated promotion mechanism was proposed to activate traditionally unreactive magnetic materials such as cobalt (Co) for ammonia synthesis by introducing hetero metal atoms bound to the active site of the catalyst sur...
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作者：Brainard, Jeffrey
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作者：Cohen, Jon
摘要：As deadline nears, negotiations continue over sharing pathogen sequences and vaccine doses
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作者：Mabesoone, Mathijs F. J.; Leopold-Messer, Stefan; Minas, Hannah A.; Chepkirui, Clara; Chawengrum, Pornsuda; Reiter, Silke; Meoded, Roy A.; Wolf, Sarah; Genz, Ferdinand; Magnus, Nancy; Piechulla, Birgit; Walker, Allison S.; Piel, Jorn
作者单位：Chulabhorn Royal Academy; Chulabhorn Graduate Institute; University of Rostock; Harvard University; Harvard Medical School; Vanderbilt University; Vanderbilt University
摘要：Bacterial multimodular polyketide synthases (PKSs) are giant enzymes that generate a wide range of therapeutically important but synthetically challenging natural products. Diversification of polyketide structures can be achieved by engineering these enzymes. However, notwithstanding successes made with textbook cis-acyltransferase (cis-AT) PKSs, tailoring such large assembly lines remains challenging. Unlike textbook PKSs, trans-AT PKSs feature an extraordinary diversity of PKS modules and co...
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作者：Phillips, Philip W.
作者单位：University of Illinois System; University of Illinois Urbana-Champaign
摘要：Oracle of condensed matter physics
