Summary »| Full Text »| PDF »|
BIOCHEMISTRY: A Missing Link in Membrane Protein Evolution
Bert Poolman, Eric R. Geertsma, and Dirk-Jan Slotboom
Science 2 March 2007: 1229-1231.
Summary »| Full Text »| PDF »|
ECOLOGY: How the Wood Moves
Katriona Shea
Science 2 March 2007: 1231-1232.
Summary »| Full Text »| PDF »|
ATMOSPHERE: Forecasting Hurricane Intensity and Impacts
Hugh E. Willoughby
Science 2 March 2007: 1232-1233.
Summary »| Full Text »| PDF »|
Brevia
Was There Really an Archean Phosphate Crisis?
Kurt O. Konhauser, Stefan V. Lalonde, Larry Amskold, and Heinrich D. Holland
Science 2 March 2007: 1234.
High silica concentrations in Archean oceans may have prevented iron oxyhydroxides from depleting the oceans of nutritionally essential phosphate, as had been thought.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Research Articles
Hurricane Intensity and Eyewall Replacement
Robert A. Houze, Jr., Shuyi S. Chen, Bradley F. Smull, Wen-Chau Lee, and Michael M. Bell
Science 2 March 2007: 1235-1239.
Aircraft observations of Hurricane Rita show that downward winds outside the eye wall led to its replacement by a new outer eye wall, causing cyclic strengthening of the storm.
Abstract »| Full Text »| PDF »|
Chankillo: A 2300-Year-Old Solar Observatory in Coastal Peru
Ivan Ghezzi and Clive Ruggles
Science 2 March 2007: 1239-1243.
Stone towers built on a hill in a 2300-year-old Peruvian temple imply that careful observations of the Sun were made in the New World long before the Inca civilization.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Human Neuroblasts Migrate to the Olfactory Bulb via a Lateral Ventricular Extension
Maurice A. Curtis, Monica Kam, Ulf Nannmark, Michelle F. Anderson, Mathilda Zetterstrom Axell, Carsten Wikkelso, Stig Holtås, Willeke M. C. van Roon-Mom, Thomas Björk-Eriksson, Claes Nordborg, Jonas Frisén, Michael Dragunow, Richard L. M. Faull, and Peter S. Eriksson
Science 2 March 2007: 1243-1249.
Published online 15 February 2007 [DOI: 10.1126/science.1136281] (in Science Express Research Articles)
As in rodents, adult human neurons born along the fluid-filled ventricles in the brain migrate to the olfactory bulb along a tubelike extension of the ventricle.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Reports
Predictions of the Properties of Water from First Principles
Robert Bukowski, Krzysztof Szalewicz, Gerrit C. Groenenboom, and Ad van der Avoird
Science 2 March 2007: 1249-1252.
A purely quantum mechanical potential energy function accurately predicts many features of water in forms ranging from an isolated pair of molecules to the bulk liquid.
Abstract »| Full Text »| PDF »|
The Focusing of Electron Flow and a Veselago Lens in Graphene p-n Junctions
Vadim V. Cheianov, Vladimir Fal'ko, and B. L. Altshuler
Science 2 March 2007: 1252-1255.
Balancing the densities of electrons and holes across a grapheme-based junction can focus an electric current, potentially leading to electronic lenses and electron beam-splitters.
Abstract »| Full Text »| PDF »|
Halwaxiids and the Early Evolution of the Lophotrochozoans
Simon Conway Morris and Jean-Bernard Caron
Science 2 March 2007: 1255-1258.
A new species from the Burgess Shale unites two enigmatic groups important in the early evolution of bilateria and implies that mollusks diverged early in the Cambrian.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Rethinking Organic Aerosols: Semivolatile Emissions and Photochemical Aging
Allen L. Robinson, Neil M. Donahue, Manish K. Shrivastava, Emily A. Weitkamp, Amy M. Sage, Andrew P. Grieshop, Timothy E. Lane, Jeffrey R. Pierce, and Spyros N. Pandis
Science 2 March 2007: 1259-1262.
Organic aerosols, thought to be unmodified from their sources, instead typically evolve through a cycle of evaporation, oxidation, and reformation in urban atmospheres.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Anti-Hebbian Long-Term Potentiation in the Hippocampal Feedback Inhibitory Circuit
Karri P. Lamsa, Joost H. Heeroma, Peter Somogyi, Dmitri A. Rusakov, and Dimitri M. Kullmann
Science 2 March 2007: 1262-1266.
In an unusual form of plasticity, certain synapses in rat interneurons are strengthened if presynaptic activity occurs while the postsynaptic cell is at rest or hyperpolarized.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Nucleus Accumbens D2/3 Receptors Predict Trait Impulsivity and Cocaine Reinforcement
上一篇：2007年02月16日 Science中英文摘要 下一篇：2007年02月23日 Science中英文摘要
共3页: 上一页 [1] 2 [3] 下一页
