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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共62条记录   SAVING FOR A RAINY DAY [作者：Cartlidge, E,期刊：Science, 页码：922-924 , 文章类型： Article，,卷期：2011年334-6058] TURNING OVER A NEW LEAF [作者：Service, RF,期刊：Science, 页码：925-927 , 文章类型： Article，,卷期：2011年334-6058] Evidence for Interstitial Carbon in Nitrogenase FeMo Cofactor [作者：Spatzal, T; Aksoyoglu, M; Zhang, LM; Andrade, SLA; Schleicher, E; Weber, S; Rees, DC; Einsle, O,期刊：Science, 页码：940-940 , 文章类型： Article，,卷期：2011年334-6058] Crystal Structure of the Eukaryotic 60S Ribosomal Subunit in Complex with Initiation Factor 6 [作者：Klinge, S; Voigts-Hoffmann, F; Leibundgut, M; Arpagaus, S; Ban, N,期刊：Science, 页码：941-948 , 文章类型： Article，,卷期：2011年334-6058] Protein synthesis in all organisms is catalyzed by ribosomes. In comparison to their prokaryotic counterparts, eukaryotic ribosomes are considerably larger and are subject to more complex regulation. The large ribosomal ... The Large, Oxygen-Rich Halos of Star-Forming Galaxies Are a Major Reservoir of Galactic Metals [作者：Tumlinson, J; Thom, C; Werk, JK; Prochaska, JX; Tripp, TM; Weinberg, DH; Peeples, MS; O'Meara, JM; Oppenheimer, BD; Meiring, JD; Katz, NS; Dave, R; Ford, AB; Sembach, KR,期刊：Science, 页码：948-952 , 文章类型： Article，,卷期：2011年334-6058] The circumgalactic medium (CGM) is fed by galaxy outflows and accretion of intergalactic gas, but its mass, heavy element enrichment, and relation to galaxy properties are poorly constrained by observations. In a survey ... The Hidden Mass and Large Spatial Extent of a Post-Starburst Galaxy Outflow [作者：Tripp, TM; Meiring, JD; Prochaska, JX; Willmer, CNA; Howk, JC; Werk, JK; Jenkins, EB; Bowen, DV; Lehner, N; Sembach, KR; Thom, C; Tumlinson, J,期刊：Science, 页码：952-955 , 文章类型： Article，,卷期：2011年334-6058] Outflowing winds of multiphase plasma have been proposed to regulate the buildup of galaxies, but key aspects of these outflows have not been probed with observations. By using ultraviolet absorption spectroscopy, we sho... A Reservoir of Ionized Gas in the Galactic Halo to Sustain Star Formation in the Milky Way [作者：Lehner, N; Howk, JC,期刊：Science, 页码：955-958 , 文章类型： Article，,卷期：2011年334-6058] Without a source of new gas, our Galaxy would exhaust its supply of gas through the formation of stars. Ionized gas clouds observed at high velocity may be a reservoir of such gas, but their distances are key for placing... Giant Piezoelectricity on Si for Hyperactive MEMS [作者：Baek, SH; Park, J; Kim, DM; Aksyuk, VA; Das, RR; Bu, SD; Felker, DA; Lettieri, J; Vaithyanathan, V; Bharadwaja, SSN; Bassiri-Gharb, N; Chen, YB; Sun, HP; Folkman, CM; Jang, HW; Kreft, DJ; Streiffer, SK; Ramesh, R; Pan, XQ; Trolier-McKinstry, S; Schlom, DG; Rzchowski, MS; Blick, RH; Eom, CB,期刊：Science, 页码：958-961 , 文章类型： Article，,卷期：2011年334-6058] Microelectromechanical systems (MEMS) incorporating active piezoelectric layers offer integrated actuation, sensing, and transduction. The broad implementation of such active MEMS has long been constrained by the inabili... Ultralight Metallic Microlattices [作者：Schaedler, TA; Jacobsen, AJ; Torrents, A; Sorensen, AE; Lian, J; Greer, JR; Valdevit, L; Carter, WB,期刊：Science, 页码：962-965 , 文章类型： Article，,卷期：2011年334-6058] Ultralight (<10 milligrams per cubic centimeter) cellular materials are desirable for thermal insulation; battery electrodes; catalyst supports; and acoustic, vibration, or shock energy damping. We present ultralight mat... Silica-Like Malleable Materials from Permanent Organic Networks [作者：Montarnal, D; Capelot, M; Tournilhac, F; Leibler, L,期刊：Science, 页码：965-968 , 文章类型： Article，,卷期：2011年334-6058] Permanently cross-linked materials have outstanding mechanical properties and solvent resistance, but they cannot be processed and reshaped once synthesized. Non-cross-linked polymers and those with reversible cross-link... Domain Dynamics During Ferroelectric Switching [作者：Nelson, CT; Gao, P; Jokisaari, JR; Heikes, C; Adamo, C; Melville, A; Baek, SH; Folkman, CM; Winchester, B; Gu, YJ; Liu, YM; Zhang, K; Wang, EG; Li, JY; Chen, LQ; Eom, CB; Schlom, DG; Pan, XQ,期刊：Science, 页码：968-971 , 文章类型： Article，,卷期：2011年334-6058] The utility of ferroelectric materials stems from the ability to nucleate and move polarized domains using an electric field. To understand the mechanisms of polarization switching, structural characterization at the nan... Negative Frequency-Dependent Selection of Sexually Antagonistic Alleles in Myodes glareolus [作者：Mokkonen, M; Kokko, H; Koskela, E; Lehtonen, J; Mappes, T; Martiskainen, H; Mills, SC,期刊：Science, 页码：972-974 , 文章类型： Article，,卷期：2011年334-6058] Sexually antagonistic genetic variation, where optimal values of traits are sex-dependent, is known to slow the loss of genetic variance associated with directional selection on fitness-related traits. However, sexual an... X-ray Emission Spectroscopy Evidences a Central Carbon in the Nitrogenase Iron-Molybdenum Cofactor [作者：Lancaster, KM; Roemelt, M; Ettenhuber, P; Hu, YL; Ribbe, MW; Neese, F; Bergmann, U; DeBeer, S,期刊：Science, 页码：974-977 , 文章类型： Article，,卷期：2011年334-6058] Nitrogenase is a complex enzyme that catalyzes the reduction of dinitrogen to ammonia. Despite insight from structural and biochemical studies, its structure and mechanism await full characterization. An iron-molybdenum ... Structural Basis of Silencing: Sir3 BAH Domain in Complex with a Nucleosome at 3.0 angstrom Resolution [作者：Armache, KJ; Garlick, JD; Canzio, D; Narlikar, GJ; Kingston, RE,期刊：Science, 页码：977-982 , 文章类型： Article，,卷期：2011年334-6058] Gene silencing is essential for regulating cell fate in eukaryotes. Altered chromatin architectures contribute to maintaining the silenced state in a variety of species. The silent information regulator (Sir) proteins re... Active Starvation Responses Mediate Antibiotic Tolerance in Biofilms and Nutrient-Limited Bacteria [作者：Nguyen, D; Joshi-Datar, A; Lepine, F; Bauerle, E; Olakanmi, O; Beer, K; McKay, G; Siehnel, R; Schafhauser, J; Wang, Y; Britigan, BE; Singh, PK,期刊：Science, 页码：982-986 , 文章类型： Article，,卷期：2011年334-6058] Bacteria become highly tolerant to antibiotics when nutrients are limited. The inactivity of antibiotic targets caused by starvation-induced growth arrest is thought to be a key mechanism producing tolerance. Here we sho... H2S: A Universal Defense Against Antibiotics in Bacteria [作者：Shatalin, K; Shatalina, E; Mironov, A; Nudler, E,期刊：Science, 页码：986-990 , 文章类型： Article，,卷期：2011年334-6058] Many prokaryotic species generate hydrogen sulfide (H2S) in their natural environments. However, the biochemistry and physiological role of this gas in nonsulfur bacteria remain largely unknown. Here we demonstrate that ...