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Science RSS FeedsThis Week in Science - Stress and Wrinkles | Quantized Transport in Graphene Sheets | An Arc Anchoring Saturn's G Ring | Manipulating Micelle Formation | Genome Transplant | Match-Making in Plants | Insulin Signaling Up-Close and Personal | Monitoring Cellular Mechanical Stress | Leukocytes on Border Patrol | Keeping Tabs on a TLR Response | Slimy Cooperative Requires Housekeeper...Feed Source: www.sciencemag.org Editors' Choice - CLIMATE SCIENCE: Choose Calcifiers with Care | IMMUNOLOGY: Degrees of Tolerance | SURFACE SCIENCE: Getting a Leg Up | CELL BIOLOGY: Let's Get Sorted | MATERIALS SCIENCE: Softening into Shape | GEOLOGY: Appalachian Twins | STKE: Hearing New Things About Calcium... Science Scope - A War Over Indirect Costs | Don't Be Put Off by Offsets | Save the Seeds | More Questions for Enviro Chief | Sarkozy Wastes No Time... Random Samples - SUITED FOR THE MOON | NETWATCH: Odds-On Favorite | MONKEYS HAVE TIN EARS | SKULL OF A POET... Newsmakers - POLITICS | PIONEERS | THEY SAID IT | HONORS... [EDITORIAL] Domestic? Forget it. - Author: Donald Kennedy... [NEWS] CLINICAL RESEARCH: Death Prompts a Review of Gene Therapy Vector - The death last week of a patient receiving experimental gene therapy for arthritis has triggered a federal review of all trials using the same vector.Author: Jocelyn Kaiser... [NEWS] BIOSECURITY: Rising Asian Threat Leaves Russia in the Lurch - The U.S. government is ending its support for former bioweapons scientists in Russia in favor of a similar but larger initiative in parts of the world that it considers potentially more dangerous to global security.Author: Yudhijit Bhattacharjee... [NEWS] SCIENTIFIC PUBLISHING: U.S. Output Flattens, and NSF Wonders Why - A new study by the National Science Foundation reveals what NSF officials call an "unprecedented" and mysterious trend: Despite the continued expansion of the peer-reviewed literature, the total output of U.S. scientists stopped growing in the early 1990s and hasn't budged since then.Author: Jeffrey Mervis... [NEWS] SOLAR POWER: Light-Splitting Trick Squeezes More Electricity Out of Sun's Rays - Researchers have used a novel light-splitting technique to achieve an unofficial record of 42.8% efficiency in converting sunlight to electricity.Author: Eli Kintisch... [NEWS] IMMUNOLOGY: A Slimy Start for Immunity? - On page 678 of this issue of Science, researchers report that slime molds deploy cells that combat pathogens, a discovery implying that specialized immune cells preceded the advent of multicellular organisms.Author: Mitch Leslie... [NEWS] FRANCE: Cancer Test Dispute Pits Researcher Against a Firm She Helped Create - PARIS--An oncologist at the French biomedical research agency is trying to stop a company from selling testing equipment based on her technology for detecting tumor cells in blood, which she says has not been sufficiently validated.Author: Martin Enserink... [NEWS FOCUS] ARCHAEOLOGY: Middle Asia Takes Center Stage - RAVENNA, ITALY--Long dismissed as a backwater, the vast area between Mesopotamia and the Indus Valley is now revealing a tapestry of wealthy urban centers that shaped humanity's first concerted attempt at city life.Author: Andrew Lawler... [NEWS FOCUS] ARCHAEOLOGY: Ancient Writing or Modern Fakery? - RAVENNA, ITALY--Yousef Madjidzadeh, chief of excavations at Jiroft in southeastern Iran, has found tablets that he believes display a hitherto unknown writing system. But the circumstances surrounding their excavation have raised doubts about the tablets' authenticity.Author: Andrew Lawler... [NEWS FOCUS] ARCHAEOLOGY: Cracking Open the Iranian Door - At the Ravenna meeting (see main text), Hassan Fazeli-Nashali, the new chief of the Archaeology Research Center in Tehran, laid out a bold plan for engaging more foreign scientists and honing the skills of Iranian academics.Author: Andrew Lawler... [NEWS FOCUS] MARINE SCIENCE: Ocean Observing Network Wades Into Swirling U.S. Fiscal Waters - A fledgling integrated monitoring system for the United States holds promise for scientists, the fishing industry, and the public--if funding can be sustained.Author: Eli Kintisch... [NEWS FOCUS] PILAI POONSWAD PROFILE: Subduing Poachers, Ducking Insurgents to Save a Splendid Bird - NARATHIWAT, THAILAND--Biologist Pilai Poonswad has earned praise for reaching out to southern Thailand's alienated Islamic communities in an effort to observe and preserve hornbills, the "canaries in the coal mine" of tropical rain forests.Author: Richard Stone... [NEWS FOCUS] ASTRONOMY: Where Are the Invisible Galaxies? - CARDIFF, UNITED KINGDOM--Cosmology predicts an abundance of small galaxies made entirely of dark matter, but astronomers haven't found any yet.Author: Adrian Cho... [LETTERS] Genetics and The Sopranos - Author: Bernard P. Possidente Jr.... [LETTERS] A Less Pessimistic View of U.S. Science Funding - Author: John H. Marburger III... [LETTERS] Evolution and Group Selection - Authors: David P. Barash, Jonathan Haidt... [BOOKS ET AL.] NUCLEAR WEAPONS: Just Another Bomb? - Gordin centers this short, intriguing reconsideration of the role of the atomic bomb in ending the second world war on the military, strategic, and political aspects of the history.Author: John Krige... [BOOKS ET AL.] NUCLEAR WEAPONS: Moving Toward Security - Cirincione provides a concise review of the development and spread of nuclear weapons and the challenges of reducing nuclear risks in the new century.Author: Christopher F. Chyba... [POLICY FORUM] ETHICS: Identifiability in Genomic Research - Genomic data are unique to the individual and must be managed with care to maintain public trust.Authors: William W. Lowrance, Francis S. Collins... [PERSPECTIVES] CELL BIOLOGY: Proteins That Promote Long Life - Quantitative analysis of proteins in a long-lived worm reveals changes that both increase and shorten life span.Author: Stuart K. Kim... [PERSPECTIVES] MATERIALS SCIENCE: Micelles Made to Order - Precise control over the molecular structure of cylindrical micelles yields novel supramolecular architectures.Author: Marc A. Hillmyer... [PERSPECTIVES] MATERIALS SCIENCE: Exploiting Wrinkle Formation - A simple method allows the elasticity and thickness of thin polymer films to be determined.Author: Aline F. Miller... [PERSPECTIVES] PLANT SCIENCE: Reproductive Dialog - A protein in ovule cells of a flowering plant recognizes the male pollen tube of the same species, ensuring successful fertilization.Author: Sheila McCormick... [PERSPECTIVES] ASTRONOMY: Seeing Through Dark Matter - Dark matter was proposed to explain galaxy dynamics. A modification of Newton's law of gravitational force may offer a better explanation.Author: Stacy McGaugh... [PERSPECTIVES] RETROSPECTIVE: Anne McLaren (1927-2007) - A leader in mammalian development and an active voice in the ethics of human embryology research is remembered.Authors: Janet Rossant, Brigid Hogan... [SPECIAL SECTION] Testing Our Defenses - Authors: Stephen J. Simpson, John Travis... [SPECIAL/NEWS] Building an HIV-Proof Immune System - Despite past setbacks in the field of gene therapy, several research teams are testing whether that strategy can provide people with immune cells that are more resistant to HIV or that can cripple the virus.Author: Jon Cohen... [SPECIAL/NEWS] Mast Cells Show Their Might - Once dismissed as "allergy cells," mast cells have proven crucial for immunity. But they've also shown a dark side.Author: Mitch Leslie... [SPECIAL/PERSPECTIVE] Primary Immunodeficiencies: A Field in Its Infancy - Authors: Jean-Laurent Casanova, Laurent Abel... [SPECIAL/PERSPECTIVE] Epigenetic Flexibility Underlying Lineage Choices in the Adaptive Immune System - Authors: Dimitris Kioussis, Katia Georgopoulos... [SPECIAL/PERSPECTIVE] Division of Labor with a Workforce of One: Challenges in Specifying Effector and Memory T Cell Fate - Authors: Steven L. Reiner, Federica Sallusto, Antonio Lanzavecchia... [SPECIAL/PERSPECTIVE] Private Lives: Reflections and Challenges in Understanding the Cell Biology of the Immune System - Author: Ira Mellman... [SPECIAL/PERSPECTIVE] Emerging Challenges in Regulatory T Cell Function and Biology - Authors: Shimon Sakaguchi, Fiona Powrie... [BREVIA] Defusing the Childhood Vocabulary Explosion - Toddlers express a burst of new words as a result of their parallel acquisition of words of varying complexity, not because they acquire a new cognitive skill.Author: Bob McMurray... [RESEARCH ARTICLES] Genome Transplantation in Bacteria: Changing One Species to Another - The intact DNA genome was isolated from one Mycoplasma species and transferred to another, replacing the recipient's genome and conferring its own phenotype.Authors: Carole Lartigue, John I. Glass, Nina Alperovich, Rembert Pieper, Prashanth P. Parmar, Clyde A. Hutchison III, Hamilton O. Smith, J. Craig Venter... [REPORTS] Quantum Hall Effect in a Gate-Controlled p-n Junction of Graphene - In graphene sheets with different areas containing either electron or hole carriers, the conductance at the junctions between regions is quantized.Authors: J. R. Williams, L. DiCarlo, C. M. Marcus... [REPORTS] Quantized Transport in Graphene p-n Junctions in a Magnetic Field - The mixing of quantum Hall edge states at the interface between different carrier regions in a graphene sheet accounts for the quantized transport through the gates.Authors: D. A. Abanin, L. S. Levitov... [REPORTS] Cylindrical Block Copolymer Micelles and Co-Micelles of Controlled Length and Architecture - A chemical system mimics living polymerization by adding block copolymers to the end of polymeric strands, forming cylindrical micelles with different lengths and functions.Authors: Xiaosong Wang, Gerald Guerin, Hai Wang, Yishan Wang, Ian Manners, Mitchell A. Winnik... [REPORTS] Block Copolymer Assembly via Kinetic Control - Controlling the electrostatic interactions of charged polymer building blocks in water yields complex flat structures with internal patterns that can be used as templates.Authors: Honggang Cui, Zhiyun Chen, Sheng Zhong, Karen L. Wooley, Darrin J. Pochan... [REPORTS] Capillary Wrinkling of Floating Thin Polymer Films - A drop of water placed on a free-floating thin polymer film produces a pattern of wrinkles that can be used to determine its elastic modulus and thickness. Authors: Jiangshui Huang, Megan Juszkiewicz, Wim H. de Jeu, Enrique Cerda, Todd Emrick, Narayanan Menon, Thomas P Russell... [REPORTS] The Source of Saturn's G Ring - Saturn's tenuous G ring, which lacks a clear source, is produced by an arc of fine debris that is trapped in orbital resonance with Saturn's inner moon Mimas.Authors: Matthew M. Hedman, Joseph A. Burns, Matthew S. Tiscareno, Carolyn C. Porco, Geraint H. Jones, Elias Roussos, Norbert Krupp, Chris Paranicas, Sascha Kempf... [REPORTS] The FERONIA Receptor-like Kinase Mediates Male-Female Interactions During Pollen Tube Reception - In plants, a female-specific kinase senses the arrival of the pollen tube, setting the stage for the next stages of fertilization and potentially controlling reproductive compatibility.Authors: Juan-Miguel Escobar-Restrepo, Norbert Huck, Sharon Kessler, Valeria Gagliardini, Jacqueline Gheyselinck, Wei-Cai Yang, Ueli Grossniklaus... [REPORTS] Quantitative Mass Spectrometry Identifies Insulin Signaling Targets in C. elegans - Identifying the genetic and protein targets of the insulin signaling pathway in C. elegans reveals mechanisms that potentially control the aging process.Authors: Meng-Qiu Dong, John D. Venable, Nora Au, Tao Xu, Sung Kyu Park, Daniel Cociorva, Jeffrey R. Johnson, Andrew Dillin, John R. Yates... [REPORTS] Forced Unfolding of Proteins Within Cells - Fluorescent labeling of cysteines in living cells reveals how mechanical stress can cause force-induced conformational changes in cellular proteins.Authors: Colin P. Johnson, Hsin-Yao Tang, Christine Carag, David W. Speicher, Dennis E. Discher... [REPORTS] Monitoring of Blood Vessels and Tissues by a Population of Monocytes with Patrolling Behavior - Immune cells that reside in endothelial tissues remain attached to the walls of blood vessels and survey for signs of damage and infection.Authors: Cedric Auffray, Darin Fogg, Meriem Garfa, Gaelle Elain, Olivier Join-Lambert, Samer Kayal, Sabine Sarnacki, Ana Cumano, Gregoire Lauvau, Frederic Geissmann... [REPORTS] Regulation of Homeostatic Chemokine Expression and Cell Trafficking During Immune Responses - During the immune response to a pathogen, lymph nodes temporarily block the entry of new immune cells, thereby optimizing the ongoing immune reaction.Authors: Scott N. Mueller, Karoline A. Hosiawa-Meagher, Bogumila T. Konieczny, Brandon M. Sullivan, Martin F. Bachmann, Richard M. Locksley, Rafi Ahmed, Mehrdad Matloubian... [REPORTS] Negative Regulation of Toll-Like Receptor Signaling by NF-?B p50 Ubiquitination Blockade - In mice, the innate immune response to microbes is controlled by blocking degradation of a transcriptional inhibitor, dampening an otherwise potentially dangerous response.Authors: Ruaidhrí J. Carmody, Qingguo Ruan, Scott Palmer, Brendan Hilliard, Youhai H. Chen... [REPORTS] Immune-like Phagocyte Activity in the Social Amoeba - The sluglike assemblies formed by social amoebae contain specialized cells that function like the phagocytes of animal immune systems, suggesting an evolutionary connection.Authors: Guokai Chen, Olga Zhuchenko, Adam Kuspa... Copyright © 2010, D.C.P. Services. All Rights Reserved. |