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作者：Vayssieres, Marlene; Marechal, Nils; Yun, Long; Duran, Brian Lopez; Murugasamy, Naveen Kumar; Fogg, Jonathan M.; Zechiedrich, Lynn; Nadal, Marc; Lamour, Valerie
作者单位：Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; Centre National de la Recherche Scientifique (CNRS); CNRS - National Institute for Biology (INSB); Institut National de la Sante et de la Recherche Medicale (Inserm); Institut National de la Sante et de la Recherche Medicale (Inserm); Institut National de la Sante et de la Recherche Medicale (Inserm); Universite PSL; Ecole Normale Superieure (ENS); Centre National de la Recherche Scientifique (CNRS); Baylor College of Medicine; Baylor College of Medicine; Universite Paris Cite; Universites de Strasbourg Etablissements Associes; Universite de Strasbourg; CHU Strasbourg
摘要：DNA supercoiling must be precisely regulated by topoisomerases to prevent DNA entanglement. The interaction of type IIA DNA topoisomerases with two DNA molecules, enabling the transport of one duplex through the transient double-stranded break of the other, remains elusive owing to structures derived solely from single linear duplex DNAs lacking topological constraints. Using cryo-electron microscopy, we solved the structure of Escherichia coli DNA gyrase bound to a negatively supercoiled mini...
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作者：Cummings, Sean
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作者：Jimenez, Gina
摘要：Large Millimeter Telescope Alfonso Serrano at risk of running out of funding in August, researchers say Large Millimeter Telescope Alfonso Serrano at risk of running out of funding in August, researchers say
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作者：Massana, Ramon
作者单位：Consejo Superior de Investigaciones Cientificas (CSIC); CSIC - Centro Mediterraneo de Investigaciones Marinas y Ambientales (CMIMA); CSIC - Instituto de Ciencias del Mar (ICM)
摘要：Eukaryotic cells are notably complex-for example, they have various organelles, which are membrane-bound structures with specific functions. Two of these organelles, mitochondria and chloroplasts, which function in respiration and photosynthesis, evolved from the integration of endosymbiotic bacteria to the eukaryotic cell ( 1 ). In marine systems, some nitrogen-fixing bacteria are endosymbionts of microalgae, such as Candidatus Atelocyanobacterium thalassa (UCYN-A), a cyanobacterial symbiont ...
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作者：Oosterheert, Wout; Sanders, Micaela Boiero; Funk, Johanna; Prumbaum, Daniel; Raunser, Stefan; Bieling, Peter
作者单位：Max Planck Society; Max Planck Society
摘要：INTRODUCTION: The dynamic turnover of actin filaments drives the morphogenesis and movement of all eukaryotic cells. The ends of actin filaments are key to controlling filament dynamics because they are the only sites where actin subunits are added or lost. Formins are highly conserved actin end-binding proteins. By recruiting actin monomers and moving with the fast-growing ends of filaments, formins act as polymerases that control actin dynamics in many biological processes. The human genome ...
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作者：Wu, Xianyuan; Hartmann, Peter; Berne, Dimitri; De Bruyn, Mario; Cuminet, Florian; Wang, Zhiwen; Zechner, Johannes Matthias; Boese, Adrian Daniel; Placet, Vincent; Caillol, Sylvain; Barta, Katalin
作者单位：University of Groningen; University of Graz; Ecole nationale superieure de chimie de Montpellier; Centre National de la Recherche Scientifique (CNRS); Universite de Montpellier; Universite Marie et Louis Pasteur; Centre National de la Recherche Scientifique (CNRS)
摘要：Epoxy resin thermosets (ERTs) are an important class of polymeric materials. However, owing to their highly cross-linked nature, they suffer from poor recyclability, which contributes to an unacceptable level of environmental pollution. There is a clear need for the design of inherently recyclable ERTs that are based on renewable resources. We present the synthesis and closed-loop recycling of a fully lignocellulose-derivable epoxy resin (DGF/MBCA), prepared from dimethyl ester of 2,5-furandic...
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作者：Nannette, Claire; Baudry, Jean; Chen, Anqi; Song, Yiqiao; Shglabow, Abdulwahed; Bremond, Nicolas; Demoulin, Damien; Walters, Jamie; Weitz, David A.; Bibette, Jerome
作者单位：Universite PSL; Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI); Centre National de la Recherche Scientifique (CNRS); Harvard University; Harvard University; Harvard University Medical Affiliates; Massachusetts General Hospital; Harvard University; Harvard University
摘要：Oil and water can only be mixed by dispersing droplets of one fluid in the other. When two droplets approach one another, the thin film that separates them invariably becomes unstable, causing the droplets to coalesce. The only known way to avoid this instability is through addition of a third component, typically a surfactant, which stabilizes the thin film at its equilibrium thickness. We report the observation that a thin fluid film of oil separating two water droplets can lead to an adhesi...
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作者：Nicholls, Bryce T.; Fors, Brett P.
作者单位：Cornell University
摘要：A bio-based plastic advances recycling
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作者：Jamieson, Dale
作者单位：New York University
摘要：A novelist's venture into nonfiction is filled with deep insights about life on Earth but may leave some wanting more
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作者：Navarro, Alberto; Vicente Lopez-Bao, Jose
作者单位：Consejo Superior de Investigaciones Cientificas (CSIC)
