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《Science》(化学、材料)连载----(25 July 2008)
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BIOCHEMISTRY: A Natural Choice for Activating Hydrogen Fraser A. Armstrong and Juan C. Fontecilla-Camps Science 25 July 2008: 498-499. The structure of a novel hydrogenase enzyme provides insights into how molecular hydrogen can be activated for use in biological processes. BIOCHEMISTRY: Cargo Load Reduction Ineke Braakman and Mieko Otsu Science 25 July 2008: 499-500. A specific enzyme that reduces protein disulfide bonds is part of a complex that eliminates aggregated, misfolded proteins. MATERIALS SCIENCE: Bulk Metallic Glasses Cormac J. Byrne and Morten Eldrup Science 25 July 2008: 502-503. Improved testing and a better understanding of the properties of bulk metallic glasses will lead to new avenues for commercial use. Studying Atomic Structures by Aberration-Corrected Transmission Electron Microscopy Knut W. Urban Science 25 July 2008: 506-510. Phase Transitions of Dirac Electrons in Bismuth Lu Li, J. G. Checkelsky, Y. S. Hor, C. Uher, A. F. Hebard, R. J. Cava, and N. P. Ong Science 25 July 2008: 547-550. Bismuth exhibits sharp phase transitions in its magnetization when subjected to high magnetic fields at low temperature. Enhancement of Thermoelectric Efficiency in PbTe by Distortion of the Electronic Density of States Joseph P. Heremans, Vladimir Jovovic, Eric S. Toberer, Ali Saramat, Ken Kurosaki, Anek Charoenphakdee, Shinsuke Yamanaka, and G. Jeffrey Snyder Science 25 July 2008: 554-557. Introduction of thallium into lead telluride improves its ability to generate electricity when heated by up to 50 percent. ERdj5 Is Required as a Disulfide Reductase for Degradation of Misfolded Proteins in the ER Ryo Ushioda, Jun Hoseki, Kazutaka Araki, Gregor Jansen, David Y. Thomas, and Kazuhiro Nagata Science 25 July 2008: 569-572. A disulfide reductase found in the endoplasmic reticulum cleaves the disulfide bonds of misfolded proteins so they can be transported into the cytoplasm for degradation. The Crystal Structure of [Fe]-Hydrogenase Reveals the Geometry of the Active Site Seigo Shima, Oliver Pilak, Sonja Vogt, Michael Schick, Marco S. Stagni, Wolfram Meyer-Klaucke, Eberhard Warkentin, Rudolf K. Thauer, and Ulrich Ermler Science 25 July 2008: 572-575. Three hydrogenases that evolved independently exhibit similar features in their active sites, yielding clues for designing catalysts in hydrogen fuel cells. 下载地址：http://www.namipan.com/d/cc58c3a ... 5bead95808985de2500 |
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