Andrew Dearing
Science 19 January 2007: 344-347.
Abstract »| Full Text »| PDF »|
Brevia
Brilliant Whiteness in Ultrathin Beetle Scales
Pete Vukusic, Benny Hallam, and Joe Noyes
Science 19 January 2007: 348.
Although only 5 micrometers thick, the scales of a beetle appear brilliantly white because they contain a sparse, random network of cuticular filaments that efficiently scatter light.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Reports
Electric Field-Induced Modification of Magnetism in Thin-Film Ferromagnets
Martin Weisheit, Sebastian Fähler, Alain Marty, Yves Souche, Christiane Poinsignon, and Dominique Givord
Science 19 January 2007: 349-351.
A weak applied electric field can reversibly modulate the magnetic properties of a thin iron-palladium film immersed in an electrolyte.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Ultralow Thermal Conductivity in Disordered, Layered WSe2 Crystals
Catalin Chiritescu, David G. Cahill, Ngoc Nguyen, David Johnson, Arun Bodapati, Pawel Keblinski, and Paul Zschack
Science 19 January 2007: 351-353.
Published online 14 December 2006 [DOI: 10.1126/science.1136494] (in Science Express Reports)
Randomly stacking the layers in tungsten selenide produces a dense solid having a remarkably low thermal conductivity at room temperature that is only twice that of air.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Organic Glasses with Exceptional Thermodynamic and Kinetic Stability
Stephen F. Swallen, Kenneth L. Kearns, Marie K. Mapes, Yong Seol Kim, Robert J. McMahon, M. D. Ediger, Tian Wu, Lian Yu, and Sushil Satija
Science 19 January 2007: 353-356.
Published online 7 December 2006 [DOI: 10.1126/science.1135795] (in Science Express Reports)
Organic molecules can form stable glasses when deposited from a vapor onto a substrate cooled only 50 kelvin below their usual glass transition temperature.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Unexpected Stability of Al4H6: A Borane Analog?
X. Li, A. Grubisic, S. T. Stokes, J. Cordes, G. F. Ganteför, K. H. Bowen, B. Kiran, M. Willis, P. Jena, R. Burgert, and H. Schnöckel
Science 19 January 2007: 356-358.
A pulsed arc discharge yields stable aluminum-hydride clusters, a new compound which has a high heat of combustion and in bulk could potentially be used for hydrogen storage.
Abstract »| Full Text »| PDF »|
Divalent Metal Nanoparticles
Gretchen A. DeVries, Markus Brunnbauer, Ying Hu, Alicia M. Jackson, Brenda Long, Brian T. Neltner, Oktay Uzun, Benjamin H. Wunsch, and Francesco Stellacci
Science 19 January 2007: 358-361.
Different molecules can be placed at opposite positions in the molecular coating of metal nanoparticles to form chemical handles, allowing assembly of the particles into chains or films.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Global-Scale Similarities in Nitrogen Release Patterns During Long-Term Decomposition
William Parton, Whendee L. Silver, Ingrid C. Burke, Leo Grassens, Mark E. Harmon, William S. Currie, Jennifer Y. King, E. Carol Adair, Leslie A. Brandt, Stephen C. Hart, and Becky Fasth
Science 19 January 2007: 361-364.
Experiments in 21 sites from seven biomes show that nitrogen release by litter decomposition depends mostly on nitrogen concentration rather than on climate variables.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Water Solubility in Aluminous Orthopyroxene and the Origin of Earth's Asthenosphere
Katrin Mierdel, Hans Keppler, Joseph R. Smyth, and Falko Langenhorst
Science 19 January 2007: 364-368.
Experiments show that the solubility of water in mantle minerals reaches a minimum at depths of 150 to 200 kilometers; the free water there may explain the melting and low seismic velocities.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
A Semi-Empirical Approach to Projecting Future Sea-Level Rise
Stefan Rahmstorf
Science 19 January 2007: 368-370.
Published online 14 December 2006 [DOI: 10.1126/science.1135456] (in Science Express Reports)
Relating the observed sea-level rise and global air-temperature increases over the 20th century predicts that sea levels may rise by 0.5 to 1.4 meters by 2100.
Abstract »| Full Text »| PDF »| Supporting Online Material »|
Nonequilibrium Mechanics of Active Cytoskeletal Networks
Daisuke Mizuno, Catherine Tardin, C. F. Schmidt, and F. C. MacKintosh
Science 19 January 2007: 370-373.
When the motor protein myosin is added to a gel-like network of cross-linked actin filaments similar to that in cells, the network stiffness increases nearly 100-fold and can then be modified by ATP.
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