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Science RSS FeedsThis Week in Science - Rainbow Signals | Polarized Crab Nebula | Wildfire Past and Present | A Clean H/F Swap | Electrons Sprung Slowly | Seamounts and Earthquakes | Sweet Scent of Outcrossing | Ancient Urban Wisdom | Channel Opening | Stem Cells from ALS Patients | Amyloid-? in Living Human Brain | Light and Mirrors | Subdued Supernova | VDAC-1 Structure in Solution...Feed Source: www.sciencemag.org Editors' Choice - CELL BIOLOGY: Nuclear Membrane Mechanics | GENETICS: Making a Meristem | EVOLUTION: Adding Less or Substrating More? | CHEMISTRY: Gold for the Shortest Bond? | CHEMISTRY: Less Strain, More Force | VIROLOGY: Hitchhiking in Membrane Traffic | SCIENCE SIGNALING: Restricted Redundancy... Science Scope - Anti-Extremist Bill Progresses | Whales to Receive Protection | EPA Is Going Down the Drain | National Medals Awarded | Climate Call... Random Samples - WHAT THE ICEMAN WORE | SCIENTISTS ON THE JOB | DESIGNING CELL DEATH | THE POPULATION GAP... Newsmakers - IN THE FIELD | MOVERS | IN THE COURTS | IN PRINT | TWO CULTURES... [EDITORIAL] Academies Active in Education - Author: Jorge E. Allende... [NEWS] POLAR SCIENCE: NSF Budget Ills Send Big Chill Through Antarctic Program - Soaring fuel prices and flat budgets are forcing the U.S. National Science Foundation (NSF) to shorten or defer dozens of research studies in the Antarctic.Author: Eli Kintisch... [NEWS] CELL BIOLOGY: Biologists Change One Cell Type Directly Into Another - Researchers at Harvard University report that they have found a way to reprogram pancreatic cells in live mice, turning them into the insulin-producing cells that are damaged or destroyed in diabetes.Author: Constance Holden... [NEWS] SCIENTIFIC MISCONDUCT: Fraud Charges Cast Doubt on Claims of DNA Damage From Cell Phone Fields - The only two peer-reviewed scientific papers showing that electromagnetic fields from cell phones can cause DNA breakage are at the center of a misconduct controversy.Author: Gretchen Vogel... [NEWS] RESEARCH FUNDING: Research Downturn - Federal support for academic research, in real terms, has dropped for 2 years running, the first-ever consecutive declines in the 35 years of tracking by the U.S. National Science Foundation.Author: ... [NEWS] CANCER RESEARCH: Can Fasting Blunt Chemotherapy's Debilitating Side Effects? - A dramatic experiment in mice has led some researchers to suggest that fasting may blunt the side effects of cancer treatment and perhaps even allow patients to tolerate higher drug doses.Author: Jennifer Couzin... [NEWS] GENETICS: First Gene for Severe Dry Macular Degeneration - This week, researchers report the first genetic variant linked to slightly higher risk for severe "dry" age-related macular degeneration, one of the two advanced forms of the disease that robs tens of millions of elderly people of their vision.Author: Jocelyn Kaiser... [NEWS FOCUS] ARCHAEOLOGY: Ancient Earthmovers of the Amazon - The forested western Amazon was once thought barren of complex human culture. But researchers are now uncovering enigmatic earthworks left by large, organized societies that once lived and farmed here.Author: Charles C. Mann... [NEWS FOCUS] ARCHAEOLOGY: The Western Amazon's "Garden Cities" - On page 1214 of this issue of Science, a U.S.-Brazilian research team reports finding a set of "garden cities" built in the forests of the south-central Amazon as early as 1250 C.E.Author: Charles C. Mann... [NEWS FOCUS] PHYSIOLOGICAL SOCIETY MEETING: Learning Under Anesthesia - Rodents commit the odors of other rodents' meals to the brain as preferred foods using a process known as olfactory learning. At the Physiological Society meeting, researchers reported that this scent-based social learning occurs even when mice are knocked out by anesthesia.Author: Lauren Cahoon... [NEWS FOCUS] PHYSIOLOGICAL SOCIETY MEETING: Testing a Taste Test for Depression - At the Physiological Society meeting, researchers presented a simple test that could help doctors to better diagnose and treat patients with depression: a taste test.Author: Lauren Cahoon... [NEWS FOCUS] ZENG YI PROFILE: A Controversial Bid to Thwart the 'Cantonese Cancer' - Zeng Yi has spent 3 decades probing a connection between Epstein-Barr virus and nasopharyngeal cancer. A new vaccine should show whether he is on the right track.Author: Jia Hepeng... [NEWS FOCUS] ZENG YI PROFILE: Mortality Survey Offers Mixed Message - Cancer has become the number one killer in urban China, causing one in four deaths, although screening and prevention programs have reduced mortality rates for some cancers.Author: Hao Xin... [LETTERS] China's Energy Policy Comes at a Price - Authors: Qiang Wang;, Jiahua Pan, Ning Zeng, Yihui Ding, Huijun Wang, Jay Gregg... [LETTERS] From Darwinism to Evolutionary Biology - Author: U. Kutschera... [Techenical Comment] Comment on ?Determining Chondritic Impactor Size from the Marine Osmium Isotope Record? - Author: Joanna V. Morgan... [TECHNICAL RESPONSE] Response to Comment on ?Determining Chondritic Impactor Size from the Marine Osmium Isotope Record? - Authors: François S. Paquay, Gregory E. Ravizza, Tarun K. Dalai, Bernhard Peucker-Ehrenbrink... [BOOKS ET AL.] POLITICAL SCIENCE: Contrasts Across the 49th Parallel - The contributors compare and contrast Canadian and US experiences with and approaches to a variety of political, social, legal, and demographic topics.Author: Stephen Randall... [BOOKS ET AL.] GENERAL SCIENCE: On the Back of an Envelope - Working through this eclectic collection of estimation problems will hone one's ability to produce plausible quantitative answers.Author: Stephan Mertens... [EDUCATION FORUM] THE EARLY YEARS: Preschool Influences on Mathematics Achievement - The advantages of home learning environment and preschool are apparent years later in children's math achievement.Authors: Edward C. Melhuish, Kathy Sylva, Pam Sammons, Iram Siraj-Blatchford, Brenda Taggart, Mai B. Phan, Antero Malin... [PERSPECTIVES] PLANT SCIENCE: The "Invisible Hand" of Floral Chemistry - Volatile compounds help flowering plants balance attracting pollinators and maximizing overall reproductive success.Author: Robert A. Raguso... [PERSPECTIVES] ASTRONOMY: Life After Death - How is a dead massive star still able to energize extremely relativistic particles?Author: Annalisa Celotti... [PERSPECTIVES] GEOPHYSICS: When Seamounts Subduct - Data from an array of seismometers on the sea floor show the complex pattern of earthquakes around subducted seamounts.Author: Roland von Huene... [PERSPECTIVES] BIOCHEMISTRY: Opening the Molecular Floodgates - Structural studies reveal how mechanosensitive channels respond to membrane tension.Authors: Chris S. Gandhi, Douglas C. Rees... [PERSPECTIVES] CHEMISTRY: A Catalytic Foothold for Fluorocarbon Reactions - A reagent-catalyst combination reveals how to make hitherto inert fluorocarbons react at room temperature, which will help to solve the problem of their disposal.Author: Robin N. Perutz... [PERSPECTIVES] DEVELOPMENTAL BIOLOGY: Neuron Research Leaps Ahead - Technologies that reprogram adult dermal cells into motor neurons should advance our understanding of neurodegenerative diseases.Author: Robert H. Brown Jr.... [AAAS 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.Author: ... [REVIEWS] Cavity Optomechanics: Back-Action at the Mesoscale - Authors: T. J. Kippenberg, K. J. Vahala... [BREVIA] Magmatically Triggered Slow Slip at Kilauea Volcano, Hawaii - Satellite radar and global positioning data show that intrusion of a dike into Kilauea volcano in June 2007 triggered slip but no earthquakes along a fault 15 to 20 hours later.Authors: Benjamin A. Brooks, James Foster, David Sandwell, Cecily J. Wolfe, Paul Okubo, Michael Poland, David Myer... [BREVIA] Bang! Month-Scale Eruption Triggering at Santorini Volcano - Modeling the diffusion of iron in crystals shows that the 1925 eruption of Santorini was triggered by intrusion of hotter magma just a few months earlier.Authors: Victoria M. Martin, Daniel J. Morgan, Dougal A. Jerram, Mark J. Caddick, David J. Prior, Jon P. Davidson... [RESEARCH ARTICLES] The Structure of an Open Form of an E. coli Mechanosensitive Channel at 3.45 Å Resolution - Circularly arrayed transmembrane helices in the bacterial mechanosensitive ion channel, MscS, expand like the iris of a camera to open the channel and allow ion efflux.Authors: Wenjian Wang, Susan S. Black, Michelle D. Edwards, Samantha Miller, Emma L. Morrison, Wendy Bartlett, Changjiang Dong, James H. Naismith, Ian R. Booth... [REPORTS] Polarized Gamma-Ray Emission from the Crab - Detection of polarized gamma rays from the Crab Pulsar implies that electrons must be accelerated to extreme energies to emit radiation near the rapidly rotating star.Authors: A. J. Dean, D. J. Clark, J. B. Stephen, V. A. McBride, L. Bassani, A. Bazzano, A. J. Bird, A. B. Hill, S. E. Shaw, P. Ubertini... [REPORTS] The Metamorphosis of Supernova SN 2008D/XRF 080109: A Link Between Supernovae and GRBs/Hypernovae - The spectra of a recent supernova evolved from that of a more energetic event to that of a less energetic one, providing a link between previous observations.Authors: Paolo A. Mazzali, Stefano Valenti, Massimo Della Valle, Guido Chincarini, Daniel N. Sauer, Stefano Benetti, Elena Pian, Tsvi Piran, Valerio D?Elia, Nancy Elias-Rosa, Raffaella Margutti, Francesco Pasotti, L. Angelo Antonelli, Filomena Bufano, Sergio Campana, Enrico Cappellaro, Stefa... [REPORTS] Hydrodefluorination of Perfluoroalkyl Groups Using Silylium-Carborane Catalysts - A catalytic cycle using boron-carbon compounds efficiently converts C-F to C-H bonds and thus can destabilize environmentally persistent fluorocarbons.Authors: Christos Douvris, Oleg V. Ozerov... [REPORTS] Inverse Velocity Dependence of Vibrationally Promoted Electron Emission from a Metal Surface - Vibrationally excited nitric oxide molecules unexpectedly ionize a surface more efficiently at slower approach velocities, apparently because there is more time for charge transfer.Authors: N. H. Nahler, J. D. White, J. LaRue, D. J. Auerbach, A. M. Wodtke... [REPORTS] Weak Interplate Coupling by Seamounts and Repeating M ~ 7 Earthquakes - More earthquakes occur in front of a subducting seamount east of Japan than over and behind it, implying that the subducting and overriding plates are weakly coupled.Authors: Kimihiro Mochizuki, Tomoaki Yamada, Masanao Shinohara, Yoshiko Yamanaka, Toshihiko Kanazawa... [REPORTS] Limits for Combustion in Low O2 Redefine Paleoatmospheric Predictions for the Mesozoic - Combustion experiments under realistic atmospheric conditions show that charcoal layers in Mesozoic rocks require a higher level of atmospheric oxygen than previously was thought.Authors: C. M. Belcher, J. C. McElwain... [REPORTS] Field Experiments with Transformed Plants Reveal the Sense of Floral Scents - Genetic manipulation of wild tobacco plants balances the use of scent to attract pollinators and toxin to limit nectar consumption in order to optimize reproduction.Authors: Danny Kessler, Klaus Gase, Ian T. Baldwin... [REPORTS] Redox-Active Antibiotics Control Gene Expression and Community Behavior in Divergent Bacteria - In addition to an antiseptic function, phenazines--pigmented antibiotics made by bacteria--organize colony structure by activating a superoxidative stress regulator.Authors: Lars E. P. Dietrich, Tracy K. Teal, Alexa Price-Whelan, Dianne K. Newman... [REPORTS] Solution Structure of the Integral Human Membrane Protein VDAC-1 in Detergent Micelles - A channel that allows diffusion of metabolites across the mitochondrial outer membrane forms an unusual 19-stranded ? barrel with a pore size of about 25 angstroms.Authors: Sebastian Hiller, Robert G. Garces, Thomas J. Malia, Vladislav Y. Orekhov, Marco Colombini, Gerhard Wagner... [REPORTS] A Structural Mechanism for MscS Gating in Lipid Bilayers - Electron paramagnetic resonance measurements reveal that tilting of transmembrane helices facilitates the opening of a bacterial mechanosensitive channel in a lipid bilayer.Authors: Valeria Vásquez, Marcos Sotomayor, Julio Cordero-Morales, Klaus Schulten, Eduardo Perozo... [REPORTS] Pre-Columbian Urbanism, Anthropogenic Landscapes, and the Future of the Amazon - Archaeology and remote sensing of an Amazon basin show that its pre-Columbian inhabitants lived in distributed towns, villages, and hamlets connected by roads.Authors: Michael J. Heckenberger, J. Christian Russell, Carlos Fausto, Joshua R. Toney, Morgan J. Schmidt, Edithe Pereira, Bruna Franchetto, Afukaka Kuikuro... [REPORTS] Induced Pluripotent Stem Cells Generated from Patients with ALS Can Be Differentiated into Motor Neurons - Skin cells from elderly individuals with a mutation that causes amyotrophic lateral sclerosis (ALS) were used to derive stem cells that could then be differentiated.Authors: John T. Dimos, Kit T. Rodolfa, Kathy K. Niakan, Laurin M. Weisenthal, Hiroshi Mitsumoto, Wendy Chung, Gist F. Croft, Genevieve Saphier, Rudy Leibel, Robin Goland, Hynek Wichterle, Christopher E. Henderson, Kevin Eggan... [REPORTS] Amyloid-? Dynamics Correlate with Neurological Status in the Injured Human Brain - After brain injury of normal people, the amount of an Alzheimer's disease peptide decreases in the extracellular fluid of the brain, returning to normal with recovery.Authors: David L. Brody, Sandra Magnoni, Kate E. Schwetye, Michael L. Spinner, Thomas J. Esparza, Nino Stocchetti, Gregory J. Zipfel, David M. Holtzman... [PODCASTS] Science Podcast - Author: ... [SUPPLEMENT] BUSINESS OFFICE FEATURE: Focus on Careers: The Postdoc Experience: Not Always What You Expect - Author: Laura Bonetta... Copyright © 2008, Internet Marketing. All Rights Reserved. |