Science 23 February 2007: 1092-1095.
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Brevia
Electrical Activity During the 2006 Mount St. Augustine Volcanic Eruptions
R. J. Thomas, P. R. Krehbiel, W. Rison, H. E. Edens, G. D. Aulich, W. P. Winn, S. R. McNutt, G. Tytgat, and E. Clark
Science 23 February 2007: 1097.
Lightning was produced during an eruption of Mount Augustine by direct electric charging of dust in the initial explosion and later from charging in the volcanic plume.
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Research Article
Nuclear Activity of MLA Immune Receptors Links Isolate-Specific and Basal Disease-Resistance Responses
Qian-Hua Shen, Yusuke Saijo, Stefan Mauch, Christoph Biskup, Stéphane Bieri, Beat Keller, Hikaru Seki, Bekir Ülker, Imre E. Somssich, and Paul Schulze-Lefert
Science 23 February 2007: 1098-1103.
Published online 21 December 2006 [DOI: 10.1126/science.1136372] (in Science Express Research Articles)
Plant immune receptors that detect pathogen attack trigger resistance responses by derepressing a transcriptional regulatory loop.
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Reports
The Triple-Ring Nebula Around SN 1987A: Fingerprint of a Binary Merger
Thomas Morris and Philipp Podsiadlowski
Science 23 February 2007: 1103-1106.
Simulations show that released angular momentum from a merger of two massive stars to form Supernova 1987A caused the ejected gas to form the observed triple-ring structure.
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Decagonal and Quasi-Crystalline Tilings in Medieval Islamic Architecture
Peter J. Lu and Paul J. Steinhardt
Science 23 February 2007: 1106-1110.
Medieval Islamic artisans used polygonal tiles to create quasi-crystalline patterns for architectural tile decorations long before the discovery of such patterns in the West.
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Ex Situ NMR in Highly Homogeneous Fields: 1H Spectroscopy
Juan Perlo, Federico Casanova, and Bernhard Blümich
Science 23 February 2007: 1110-1112.
Published online 11 January 2007 [DOI: 10.1126/science.1135499] (in Science Express Reports)
A movable array of permanent magnets can produce a homogeneous magnetic field anywhere, allowing portable nuclear magnetic resonance spectroscopy at high resolution.
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Structure of the Polycrystalline Zeolite Catalyst IM-5 Solved by Enhanced Charge Flipping
Christian Baerlocher, Fabian Gramm, Lars Massüger, Lynne B. McCusker, Zhanbing He, Sven Hovmöller, and Xiaodong Zou
Science 23 February 2007: 1113-1116.
An algorithm yields the crystal structure of complex porous materials such as zeolites from microscopy and powder diffraction data when clean single crystals are inaccessible.
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Shaping of Elastic Sheets by Prescription of Non-Euclidean Metrics
Yael Klein, Efi Efrati, and Eran Sharon
Science 23 February 2007: 1116-1120.
Non-Euclidean metrics can predict patterns of buckling and wrinkling in thin elastic sheets.
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Focusing Beyond the Diffraction Limit with Far-Field Time Reversal
Geoffroy Lerosey, Julien de Rosny, Arnaud Tourin, and Mathias Fink
Science 23 February 2007: 1120-1122.
A time-reversal mirror focuses microwaves, including those scattered randomly, on a distant receiver array to improve resolution to better than 1/30th of the wavelength.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Redefining the Age of Clovis: Implications for the Peopling of the Americas
Michael R. Waters and Thomas W. Stafford, Jr.
Science 23 February 2007: 1122-1126.
New radiocarbon dates and a reassessment of existing dates imply that the Clovis culture thrived in the New World for only 250 years, perhaps following an earlier colonization.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Quantitative Phylogenetic Assessment of Microbial Communities in Diverse Environments
C. von Mering, P. Hugenholtz, J. Raes, S. G. Tringe, T. Doerks, L. J. Jensen, N. Ward, and P. Bork
Science 23 February 2007: 1126-1130.
Published online 1 February 2007 [DOI: 10.1126/science.1133420] (in Science Express Reports)
Analysis of microbial protein-coding genes from several ecosystems shows that taxa prefer certain habitats and that evolution is faster in some places than in others.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Staphylococcus aureus Panton-Valentine Leukocidin Causes Necrotizing Pneumonia
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