ATMOSPHERES: The Jet-Stream Conundrum
Mark P. Baldwin, Peter B. Rhines, Huei-Ping Huang, and Michael E. McIntyre
Science 26 January 2007: 467-468.
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DEVELOPMENTAL BIOLOGY: The Mother of All Stem Cells?
Allan C. Spradling and Yixian Zheng
Science 26 January 2007: 469-470.
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CHEMISTRY: Single-Molecule Catalysis
Ian Smith
Science 26 January 2007: 470-471.
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GEOPHYSICS: Mediating Plate Convergence
Herb Dragert
Science 26 January 2007: 471-472.
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Association Affairs
AAAS News and Notes
Science 26 January 2007: 473-475.
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Review
Recombination and the Nature of Bacterial Speciation
Christophe Fraser, William P. Hanage, and Brian G. Spratt
Science 26 January 2007: 476-480.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Brevia
Sex-Specific UV and Fluorescence Signals in Jumping Spiders
Matthew L. M. Lim, Michael F. Land, and Daiqin Li
Science 26 January 2007: 481.
Ultraviolet light is required for courtship in some jumping spiders: Males recognize females' UV-elicited fluorescence; females recognize males by UV-reflective patches on their bodies.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Research Article
Histocompatible Embryonic Stem Cells by Parthenogenesis
Kitai Kim, Paul Lerou, Akiko Yabuuchi, Claudia Lengerke, Kitwa Ng, Jason West, Andrew Kirby, Mark J. Daly, and George Q. Daley
Science 26 January 2007: 482-486.
Published online 14 December 2006 [DOI: 10.1126/science.1133542] (in Science Express Research Articles)
Mouse embryos that develop by parthenogenesis can be a source of embryonic stem cells immunologically compatible with the donor.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Reports
Reversible Switching of Hydrogel-Actuated Nanostructures into Complex Micropatterns
Alexander Sidorenko, Tom Krupenkin, Ashley Taylor, Peter Fratzl, and Joanna Aizenberg
Science 26 January 2007: 487-490.
Silicon nanocolumns embedded in a polymer hydrogel rapidly change their tilt in response to changes in humidity; complex patterns can be made by adjusting the stress field of the gel.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Electromechanical Resonators from Graphene Sheets
J. Scott Bunch, Arend M. van der Zande, Scott S. Verbridge, Ian W. Frank, David M. Tanenbaum, Jeevak M. Parpia, Harold G. Craighead, and Paul L. McEuen
Science 26 January 2007: 490-493.
A graphene sheet one atom thick, suspended across a nanoscale trench, can be induced to vibrate optically and electrically, providing the ultimate two-dimensional resonator.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Improved Oxygen Reduction Activity on Pt3Ni(111) via Increased Surface Site Availability
Vojislav R. Stamenkovic, Ben Fowler, Bongjin Simon Mun, Guofeng Wang, Philip N. Ross, Christopher A. Lucas, and Nenad M. Markovic
Science 26 January 2007: 493-497.
Published online 11 January 2007 [DOI: 10.1126/science.1135941] (in Science Express Reports)
The Pt-enriched outer surface layer of the close-packed (111) surface has an altered electronic structure that favors O2 adsorption over species such as OH.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Water Catalysis of a Radical-Molecule Gas-Phase Reaction
E. Vöhringer-Martinez, B. Hansmann, H. Hernandez, J. S. Francisco, J. Troe, and B. Abel
Science 26 January 2007: 497-501.
Measurements of reaction rates and simulations show that water molecules can act as catalysts in the gas phase and may participate in low-temperature reactions in the atmosphere.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Martian Atmospheric Erosion Rates
Stas Barabash, Andrei Fedorov, Rickard Lundin, and Jean-Andre Sauvaud
Science 26 January 2007: 501-503.
Measurements from Mars Express show that the solar wind is removing only a small amount of Mars' atmosphere, implying that the formally abundant H2O and CO2 remain underground.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Slow Earthquakes Coincident with Episodic Tremors and Slow Slip Events
Yoshihiro Ito, Kazushige Obara, Katsuhiko Shiomi, Shutaro Sekine, and Hitoshi Hirose
Science 26 January 2007: 503-506.
Published online 30 November 2006 [DOI: 10.1126/science.1134454] (in Science Express Reports)
A series of weak low-frequency earthquakes correspond with seismic tremor and slip episodes on a subduction zone beneath Japan, perhaps increasing overall stress.
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