![European Monitoring Centre for Drugs and Drug Addiction [nové okno]](/design/plain/images/left_top_menu/emcdda.gif)
![Rada vlády pro koordinaci protidrogové politiky [nové okno]](/design/plain/images/left_top_menu/rvkpp.gif)
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 Unported License.
drogy-info.cz / Novinky odjinud / Science: Current Issue
Science: Current Issue
[NEWS FOCUS] U.S. EDUCATION POLICY: NSF Board Wades Into Swirling Debate on School Reform
A new commission from the National Science Foundation's National Science Board hopes to point the way toward helping U.S. students do better in science and math. (
Read more
.)
Author: Jeffrey Mervis
[NEWS FOCUS] SCIENTIFIC MISCONDUCT: Cleaning Up the Paper Trail
Once an investigation is completed and the publicity dies down, what happens to fraudulent or suspect papers? In many cases, not much. (
Read more
.)
Authors: Jennifer Couzin, Katherine Unger
[NEWS FOCUS] SCIENTIFIC MISCONDUCT: Even Retracted Papers Endure
Using Thomson Scientific's ISI Web of Knowledge and Google Scholar, Science found dozens of citations of retracted papers in fields from physics to cancer research to plant biology. (
Read more
.)
Authors: Katherine Unger, Jennifer Couzin
[NEWS] MEDICINE: Old Drug, New Hope for Marfan Syndrome
On page 117, researchers report that in a mouse model of Marfan syndrome, the blood pressure drug losartan prevents aortic aneurysms as well as lung problems sometimes seen in the condition. (
Read more
.)
Author: John Travis
[NEWS] CHEMISTRY: New Polymer May Rev Up the Output of Fuel Cells Used to Power Cars
ATLANTA, GEORGIA--Last week, at a meeting here of the American Chemical Society, researchers unveiled a new polymer membrane that could markedly improve the performance of automotive fuel cells. (
Read more
.)
Author: Robert F. Service
[NEWS] DEVELOPMENT AND ECOLOGY: Villagers Drafted Into China's Model of 'Sustainability'
HUANGBAIYU, CHINA--China's first "sustainable village," set to open here this summer, marks the start of a revolution: a path for China to slash its voracious consumption of natural resources and convert wasted rural space into croplands or forests. (
Read more
.)
Author: Richard Stone
[NEWS] U.S. OCEAN POLICY: Major Fisheries Bill Introduced in House
Conservationists are accusing the chair of the House Resources Committee of trying to water down environmental rules governing the management of U.S. fisheries, but the proposal to reauthorize the 30-year-old Magnuson-Stevens Act would also elevate the role of science in fisheries management. (
Read more
.)
Author: Erik Stokstad
[NEWS] PALEONTOLOGY: Fossil Shows an Early Fish (Almost) out of Water
A 375-million-year-old fossil, reported in the 6 April issue of Nature, is the latest--and most telling--fossil showing how aquatic vertebrates turned into four-legged landlubbers called tetrapods. (
Read more
.)
Author: Elizabeth Pennisi
[NEWS] GERMAN SCIENCE: With Friends Like CAESAR's, Who Needs Brutus?
BERLIN--The perceived threat of a hostile takeover has researchers at the Center of Advanced European Studies and Research (CAESAR) worried for their jobs. (
Read more
.)
Author: Gretchen Vogel
[NEWS] U.S. SCIENCE POLICY: Revised NASA Media Rules Promise Greater Openness
Jim Hansen, the NASA scientist who said this winter that the agency had muzzled his views on climate change, now says that he's "reasonably happy" with a draft media policy unveiled last week. (
Read more
.)
Author: Eli Kintisch
[EDITORIAL] FDA Centennial
Author: Donald Kennedy
[NEWS] SOUTH KOREA: Premier Science University Ousts Unpopular President
SEOUL--Last week, trustees of the Korea Advanced Institute of Science and Technology in Daejeon voted not to renew the contract of its first non-Korean president, Nobelist Robert B. Laughlin. (
Read more
.)
Author: D. Yvette Wohn
Newsmakers
AWARDS | DEATHS | DEATHS | MOVERS | THREE Q'S
Science Scope
Maryland Goes for Stem Cells | Collateral Damage | Italian Voters Ponder Science | Updates
Random Samples
ANCIENT IRISH STONES REINTERPRETED | HOOKE HOME TO STAY | HOPPERS AND CREEPERS TREED | AFRICAN SOIL EXHAUSTION
NetWatch
RESOURCES: Climate Swings | EDUCATION: Stem Cell Basics | EXHIBITS: Electrification Project | DATABASE: The Crustacean Cure
Editors' Choice
CLIMATE SCIENCE: Lining up the Ducks | ECOLOGY/EVOLUTION: The Origin of Natural Selection | GEOPHYSICS: Not the Fault of Compaction | MATERIALS SCIENCE: Crayfish Crystals | BIOCHEMISTRY: A NAG-NAM Network | DEVELOPMENT: Trading Accuracy for Speed | STKE: Holding Onto Two Jobs
This Week in Science
Repeating Ring Properties | Beginning with C-H Bonds | From Quantum Kittens to Flying Cats | Superalloying Cobalt | H2 Leaves Pt Unexcited | Hunting Hurricane Causes | No Pain, No Gain | Ant Family Tree | MicroRNAs in Embryogenesis | Serotonin and Liver Regeneration | Limits to Evolutionary Flexibility | Therapy for Marfan Syndrome | Tropical Pacific Climate Evolution | Prescient Hormone Receptor Evolution? | Make Space
NEW PRODUCTS
For more product information, visit the ProductInfo database at http://science.labvelocity.com
[REPORTS] Cellulose Synthase-Like CslF Genes Mediate the Synthesis of Cell Wall (1,3;1,4)-{beta}-D-Glucans
An enzyme identified in rice generates a complex sugar found in the cell walls of many grains that are as important as human and animal food.Authors: Rachel A. Burton, Sarah M. Wilson, Maria Hrmova, Andrew J. Harvey, Neil J. Shirley, Anne Medhurst, Bruce A. Stone, Edward J. Newbigin, Antony Bacic, Geoffrey B. Fincher
[REPORTS] Genome-Wide Detection of Polymorphisms at Nucleotide Resolution with a Single DNA Microarray
Hybridization of yeast DNA from a test strain to a microarray with redundant reference DNA simply and rapidly identifies most of the polymorphisms between the two strains.Authors: David Gresham, Douglas M. Ruderfer, Stephen C. Pratt, Joseph Schacherer, Maitreya J. Dunham, David Botstein, Leonid Kruglyak
[REPORTS] Rice Domestication by Reducing Shattering
The retention of rice grains on the plant after ripening -- a trait important for domestication -- is the result of a single nucleotide change in a transcription factor gene.Authors: Changbao Li, Ailing Zhou, Tao Sang
[REPORTS] A Critical Role for the Innate Immune Signaling Molecule IRAK-4 in T Cell Activation
A signaling enzyme known to participate in innate immunity in mice is unexpectedly also required for adaptive immune responses in T cells.Authors: Nobutaka Suzuki, Shinobu Suzuki, Douglas G. Millar, Midori Unno, Hiromitsu Hara, Thomas Calzascia, Sho Yamasaki, Tadashi Yokosuka, Nien-Jung Chen, Alisha R. Elford, Jun-ichiro Suzuki, Arata Takeuchi, Christine Mirtsos, Denis Bouchard, Pamela S. Ohashi, Wen-Chen Yeh, Takashi Saito
[REPORTS] Selective Stimulation of T Cell Subsets with Antibody-Cytokine Immune Complexes
The paradoxical stimulation of memory immune cells is explained by an unusual activation of a growth factor when bound to an antibody usually thought to be inhibitory.Authors: Onur Boyman, Marek Kovar, Mark P. Rubinstein, Charles D. Surh, Jonathan Sprent
[REPORTS] Kaposi's Sarcoma-Associated Herpesvirus Fusion-Entry Receptor: Cystine Transporter xCT
The Kaposi's sarcoma-associated herpesvirus enters human cells by binding to a transporter that shuttles metabolic precursors into cells.Authors: Johnan A. R. Kaleeba, Edward A. Berger
[REPORTS] Significant Warming of the Antarctic Winter Troposphere
The wintertime temperature of the Antarctic troposphere has risen by more than 0.5 degrees Celsius per year over the past 30 years, a rate larger than that for any other region.Authors: J. Turner, T. A. Lachlan-Cope, S. Colwell, G. J. Marshall, W. M. Connolley
[REPORTS] Changes in Surface Water Supply Across Africa with Predicted Climate Change
Simulations of future precipitation imply that reduced stream flow will further restrict water availability across much of sub-Saharan Africa over the next century.Authors: Maarten de Wit, Jacek Stankiewicz
[REPORTS] High-Performance High-Tc Superconducting Wires
Deposition of a thin, high-temperature superconductor film on a metal substrate produces superconducting wires capable of carrying sufficient current for many applications.Authors: S. Kang, A. Goyal, J. Li, A. A. Gapud, P. M. Martin, L. Heatherly, J. R. Thompson, D. K. Christen, F. A. List, M. Paranthaman, D. F. Lee
[REPORTS] A Linear Homocatenated Compound Containing Six Indium Centers
A judiciously chosen ligand stabilizes a compound with six indium centers linked in a chain, geometry reminiscent of hydrocarbons and surprising for a heavy element.Authors: Michael S. Hill, Peter B. Hitchcock, Ruti Pongtavornpinyo
[REPORTS] Rotational Coherence and a Sudden Breakdown in Linear Response Seen in Room-Temperature Liquids
Cyanide fragments generated with high angular momentum in water or alcohol appear to push aside the solvent and rotate for picoseconds as though in the gas phase.Authors: Amy C. Moskun, Askat E. Jailaubekov, Stephen E. Bradforth, Guohua Tao, Richard M. Stratt
[REPORTS] A Radio Pulsar Spinning at 716 Hz
A neutron star in the Terzan 5 globular cluster is rotating 15 percent more rapidly than other known pulsars, constraining its radius to about 16 kilometers.Authors: Jason W. T. Hessels, Scott M. Ransom, Ingrid H. Stairs, Paulo C. C. Freire, Victoria M. Kaspi, Fernando Camilo
[RESEARCH ARTICLES] Deformation and Slip Along the Sunda Megathrust in the Great 2005 Nias-Simeulue Earthquake
Exposed coral reefs and shorelines and Global Positioning System data show that the huge 2005 Indonesian earthquake produced belts of uplift and subsidence extending up to an aseismic region.Authors: Richard W. Briggs, Kerry Sieh, Aron J. Meltzner, Danny Natawidjaja, John Galetzka, Bambang Suwargadi, Ya-ju Hsu, Mark Simons, Nugroho Hananto, Imam Suprihanto, Dudi Prayudi, Jean-Philippe Avouac, Linette Prawirodirdjo, Yehuda Bock
[RESEARCH ARTICLES] A Mitotic Lamin B Matrix Induced by RanGTP Required for Spindle Assembly
Lamin B, a structural protein of the interphase nucleus also coordinates assembly of the mitotic spindle.Authors: Ming-Ying Tsai, Shusheng Wang, Jill M. Heidinger, Dale K. Shumaker, Stephen A. Adam, Robert D. Goldman, Yixian Zheng
[RESEARCH ARTICLES] Cenozoic Plant Diversity in the Neotropics
A 45-million-year record of fossil pollen reveals that speciation induced by climate warming episodically increased biological diversity in neo tropical forests.Authors: Carlos Jaramillo, Milton J. Rueda, Germán Mora
[BREVIA] How Fast Was Wild Wheat Domesticated?
The abundance of wild shattered wheat spikelets in archaeological sites in the Near East implies that domestication of cereals started early but proceeded slowly.Authors: Ken-ichi Tanno, George Willcox
[REVIEW] Stem Cells and Their Niches
Authors: Kateri A. Moore, Ihor R. Lemischka
[a-affairs] AAAS News and Notes
A monthly roundup of recent news and projects of Science's publisher, the American Association for the Advancement of Science.
[PERSPECTIVES] ASTRONOMY: A Neutron Star in F-sharp
Discovery of the fastest spinning pulsar gives new constraints on the size of a neutron star and matter under extreme conditions and decreases the need for gravitational waves to impose a limiting maximum spin.Author: Jonathan E. Grindlay
[PERSPECTIVES] GEOPHYSICS: Dangerous Tectonics, Fragile Buildings, and Tough Decisions
The occurrence of four fatal earthquakes within and around the Indian plate in the last 5 years, including two great ones, highlights the need for earthquake-resistant construction and replacement throughout the region.Author: Roger Bilham
[PERSPECTIVES] IMMUNOLOGY: An Antibody Paradox, Resolved
The immune effect of a cytokine bound to an antibody is paradoxically much stronger than that of the cytokine alone, suggesting a way to lower therapeutic doses and thereby reduce side effects.Authors: Martin Prlic, Michael J. Bevan