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  • American Association for the Advancement of Science (AAAS)  (3)
  • Amsterdam : Elsevier  (1)
  • Oxford University Press
  • American Institute of Physics (AIP)
  • 2000-2004  (4)
  • 2004  (4)
Collection
Publisher
Language
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  • 2000-2004  (4)
Year
  • 1
    Call number: ILP/M 06.0353
    In: Publication of the International Lithosphere Programme
    In: Tectonophysics
    Type of Medium: Monograph available for loan
    Pages: vi, 271 S. : Ill., graph. Darst.
    Series Statement: [Publication of the International Lithosphere Programme] 381,1-4 : special issue
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Publication Date: 2004-08-25
    Description: Intracellular acidification of skeletal muscles is commonly thought to contribute to muscle fatigue. However, intracellular acidosis also acts to preserve muscle excitability when muscles become depolarized, which occurs with working muscles. Here, we show that this process may be mediated by decreased chloride permeability, which enables action potentials to still be propagated along the internal network of tubules in a muscle fiber (the T system) despite muscle depolarization. These results implicate chloride ion channels in muscle function and emphasize that intracellular acidosis of muscle has protective effects during muscle fatigue.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pedersen, Thomas H -- Nielsen, Ole B -- Lamb, Graham D -- Stephenson, D George -- New York, N.Y. -- Science. 2004 Aug 20;305(5687):1144-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Physiology, University of Aarhus, DK-8000, Denmark.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15326352" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Calcium/metabolism ; Chloride Channels/*metabolism ; Chlorides/metabolism ; Electric Stimulation ; Hydrogen-Ion Concentration ; In Vitro Techniques ; Lactic Acid/metabolism ; Membrane Potentials ; Muscle Contraction ; *Muscle Fatigue ; Muscle Fibers, Skeletal/metabolism/*physiology ; Muscle, Skeletal/metabolism/*physiology ; Permeability ; Potassium/metabolism ; Rats ; Sarcoplasmic Reticulum/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2004-11-30
    Description: The widespread extinctions of large mammals at the end of the Pleistocene epoch have often been attributed to the depredations of humans; here we present genetic evidence that questions this assumption. We used ancient DNA and Bayesian techniques to reconstruct a detailed genetic history of bison throughout the late Pleistocene and Holocene epochs. Our analyses depict a large diverse population living throughout Beringia until around 37,000 years before the present, when the population's genetic diversity began to decline dramatically. The timing of this decline correlates with environmental changes associated with the onset of the last glacial cycle, whereas archaeological evidence does not support the presence of large populations of humans in Eastern Beringia until more than 15,000 years later.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shapiro, Beth -- Drummond, Alexei J -- Rambaut, Andrew -- Wilson, Michael C -- Matheus, Paul E -- Sher, Andrei V -- Pybus, Oliver G -- Gilbert, M Thomas P -- Barnes, Ian -- Binladen, Jonas -- Willerslev, Eske -- Hansen, Anders J -- Baryshnikov, Gennady F -- Burns, James A -- Davydov, Sergei -- Driver, Jonathan C -- Froese, Duane G -- Harington, C Richard -- Keddie, Grant -- Kosintsev, Pavel -- Kunz, Michael L -- Martin, Larry D -- Stephenson, Robert O -- Storer, John -- Tedford, Richard -- Zimov, Sergei -- Cooper, Alan -- New York, N.Y. -- Science. 2004 Nov 26;306(5701):1561-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Henry Wellcome Ancient Biomolecules Centre, Oxford University, South Parks Road, Oxford OX13PS, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15567864" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Animals ; Bayes Theorem ; *Bison/classification/genetics ; Canada ; China ; *Climate ; DNA, Mitochondrial/genetics ; Environment ; *Fossils ; Genetic Variation ; Genetics, Population ; Human Activities ; Humans ; North America ; Phylogeny ; Population Dynamics ; Sequence Analysis, DNA ; Time
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2004-06-12
    Description: Understanding the suppression of ferroelectricity in perovskite thin films is a fundamental issue that has remained unresolved for decades. We report a synchrotron x-ray study of lead titanate as a function of temperature and film thickness for films as thin as a single unit cell. At room temperature, the ferroelectric phase is stable for thicknesses down to 3 unit cells (1.2 nanometers). Our results imply that no thickness limit is imposed on practical devices by an intrinsic ferroelectric size effect.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fong, Dillon D -- Stephenson, G Brian -- Streiffer, Stephen K -- Eastman, Jeffrey A -- Auciello, Orlando -- Fuoss, Paul H -- Thompson, Carol -- New York, N.Y. -- Science. 2004 Jun 11;304(5677):1650-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15192223" target="_blank"〉PubMed〈/a〉
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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