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  • American Association for the Advancement of Science (AAAS)  (20)
  • American Meteorological Society
  • 2005-2009  (10)
  • 1985-1989  (12)
  • 1975-1979  (6)
  • 1955-1959  (1)
  • 1940-1944
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  • 1
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    Protection of C. elegans from anoxia by HYL-2 ceramide synthase (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-04-18
    Description: Oxygen deprivation is rapidly deleterious for most organisms. However, Caenorhabditis elegans has developed the ability to survive anoxia for at least 48 hours. Mutations in the DAF-2/DAF-16 insulin-like signaling pathway promote such survival. We describe a pathway involving the HYL-2 ceramide synthase that acts independently of DAF-2. Loss of the ceramide synthase gene hyl-2 results in increased sensitivity of C. elegans to anoxia. C. elegans has two ceramide synthases, hyl-1 and hyl-2, that participate in ceramide biogenesis and affect its ability to survive anoxic conditions. In contrast to hyl-2(lf) mutants, hyl-1(lf) mutants are more resistant to anoxia than normal animals. HYL-1 and HYL-2 have complementary specificities for fatty acyl chains. These data indicate that specific ceramides produced by HYL-2 confer resistance to anoxia.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Menuz, Vincent -- Howell, Kate S -- Gentina, Sebastien -- Epstein, Sharon -- Riezman, Isabelle -- Fornallaz-Mulhauser, Monique -- Hengartner, Michael O -- Gomez, Marie -- Riezman, Howard -- Martinou, Jean-Claude -- New York, N.Y. -- Science. 2009 Apr 17;324(5925):381-4. doi: 10.1126/science.1168532.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell Biology, University of Geneva, CH-1211 Geneva 4, Switzerland.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19372430" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apoptosis ; Caenorhabditis elegans/cytology/genetics/*physiology ; Caenorhabditis elegans Proteins/*genetics/*metabolism ; *Cell Hypoxia ; Ceramides/biosynthesis/*physiology ; Gene Deletion ; Genes, Helminth ; Mutation ; Oxidoreductases/*genetics/*metabolism ; Oxygen/*physiology ; Receptor, Insulin/genetics/metabolism ; Saccharomyces cerevisiae/genetics/growth & development/physiology ; Sphingomyelins/biosynthesis/physiology ; Substrate Specificity ; Transformation, Genetic ; Transgenes
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    A kinase-START gene confers temperature-dependent resistance to wheat stripe rust (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-02-21
    Description: Stripe rust is a devastating fungal disease that afflicts wheat in many regions of the world. New races of Puccinia striiformis, the pathogen responsible for this disease, have overcome most of the known race-specific resistance genes. We report the map-based cloning of the gene Yr36 (WKS1), which confers resistance to a broad spectrum of stripe rust races at relatively high temperatures (25 degrees to 35 degrees C). This gene includes a kinase and a putative START lipid-binding domain. Five independent mutations and transgenic complementation confirmed that both domains are necessary to confer resistance. Yr36 is present in wild wheat but is absent in modern pasta and bread wheat varieties, and therefore it can now be used to improve resistance to stripe rust in a broad set of varieties.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4737487/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4737487/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Fu, Daolin -- Uauy, Cristobal -- Distelfeld, Assaf -- Blechl, Ann -- Epstein, Lynn -- Chen, Xianming -- Sela, Hanan -- Fahima, Tzion -- Dubcovsky, Jorge -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2009 Mar 6;323(5919):1357-60. doi: 10.1126/science.1166289. Epub 2009 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Plant Sciences, University of California, Davis, CA 95616, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19228999" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Basidiomycota/*pathogenicity ; Cloning, Molecular ; Crosses, Genetic ; Down-Regulation ; *Genes, Plant ; Hot Temperature ; Immunity, Innate ; Molecular Sequence Data ; Phosphotransferases/chemistry/*genetics/metabolism ; Physical Chromosome Mapping ; *Plant Diseases/immunology/microbiology ; Plant Proteins/chemistry/genetics/metabolism ; Plants, Genetically Modified ; Triticum/*genetics/*microbiology
    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
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    Cancer. An anchor for tumor cell invasion (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-03-19
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yuspa, Stuart H -- Epstein, Ervin H Jr -- New York, N.Y. -- Science. 2005 Mar 18;307(5716):1727-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Laboratory of Cellular Carcinogenesis and Tumor Promotion, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA. sy12j@nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/15774745" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Carcinoma, Squamous Cell/etiology/genetics/pathology/*physiopathology ; Cell Adhesion Molecules/metabolism ; Cell Transformation, Neoplastic ; Collagen Type VII/chemistry/*genetics/*physiology ; Disease Susceptibility ; Epidermolysis Bullosa Dystrophica/complications/*genetics/metabolism/pathology ; Genes, ras ; Humans ; I-kappa B Proteins/genetics/metabolism ; Keratinocytes/*metabolism/pathology ; Mice ; Mutation ; Neoplasm Invasiveness ; Protein Structure, Tertiary ; Skin Neoplasms/etiology/genetics/pathology/*physiopathology ; Transduction, Genetic ; Transforming Growth Factor beta/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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  • 4
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    Bats are natural reservoirs of SARS-like coronaviruses (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-10-01
    Description: Severe acute respiratory syndrome (SARS) emerged in 2002 to 2003 in southern China. The origin of its etiological agent, the SARS coronavirus (SARS-CoV), remains elusive. Here we report that species of bats are a natural host of coronaviruses closely related to those responsible for the SARS outbreak. These viruses, termed SARS-like coronaviruses (SL-CoVs), display greater genetic variation than SARS-CoV isolated from humans or from civets. The human and civet isolates of SARS-CoV nestle phylogenetically within the spectrum of SL-CoVs, indicating that the virus responsible for the SARS outbreak was a member of this coronavirus group.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Li, Wendong -- Shi, Zhengli -- Yu, Meng -- Ren, Wuze -- Smith, Craig -- Epstein, Jonathan H -- Wang, Hanzhong -- Crameri, Gary -- Hu, Zhihong -- Zhang, Huajun -- Zhang, Jianhong -- McEachern, Jennifer -- Field, Hume -- Daszak, Peter -- Eaton, Bryan T -- Zhang, Shuyi -- Wang, Lin-Fa -- R01-TW05869/TW/FIC NIH HHS/ -- New York, N.Y. -- Science. 2005 Oct 28;310(5748):676-9. Epub 2005 Sep 29.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Zoology, Chinese Academy of Sciences (CAS), Beijing, China.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16195424" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Animals ; Cercopithecus aethiops ; China/epidemiology ; Chiroptera/*virology ; Communicable Diseases, Emerging ; *Coronavirus/classification ; Disease Outbreaks ; *Disease Reservoirs ; Genetic Variation ; Genome, Viral ; Henipavirus/classification ; Humans ; Molecular Sequence Data ; Mutation ; Phylogeny ; Polymerase Chain Reaction ; *SARS Virus/classification ; Sequence Analysis, DNA ; Severe Acute Respiratory Syndrome/epidemiology/transmission/virology ; Vero Cells ; Viverridae/virology
    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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  • 5
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    Role of land-surface changes in arctic summer warming (2005)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2005-09-24
    Description: A major challenge in predicting Earth's future climate state is to understand feedbacks that alter greenhouse-gas forcing. Here we synthesize field data from arctic Alaska, showing that terrestrial changes in summer albedo contribute substantially to recent high-latitude warming trends. Pronounced terrestrial summer warming in arctic Alaska correlates with a lengthening of the snow-free season that has increased atmospheric heating locally by about 3 watts per square meter per decade (similar in magnitude to the regional heating expected over multiple decades from a doubling of atmospheric CO2). The continuation of current trends in shrub and tree expansion could further amplify this atmospheric heating by two to seven times.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chapin, F S 3rd -- Sturm, M -- Serreze, M C -- McFadden, J P -- Key, J R -- Lloyd, A H -- McGuire, A D -- Rupp, T S -- Lynch, A H -- Schimel, J P -- Beringer, J -- Chapman, W L -- Epstein, H E -- Euskirchen, E S -- Hinzman, L D -- Jia, G -- Ping, C-L -- Tape, K D -- Thompson, C D C -- Walker, D A -- Welker, J M -- New York, N.Y. -- Science. 2005 Oct 28;310(5748):657-60. Epub 2005 Sep 22.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute of Arctic Biology; University of Alaska Fairbanks, Fairbanks, AK 99775, USA. terry.chapin@uaf.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16179434" target="_blank"〉PubMed〈/a〉
    Keywords: Alaska ; Arctic Regions ; *Greenhouse Effect ; Picea ; Seasons ; Trees
    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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  • 6
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    Molecular/Organic ferromagnets (1988)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1988-04-01
    Description: Quantitative bulk ferromagnetic behavior has been established for the molecular/organic solid [Fe(III)(C(5)Me(5))(2)].(+)[TCNE].(-). Above 16 K the dominant magnetic interactions are along a 1-D chain and, near T(c), 3-D bulk effects as evidenced by the value of the critical exponents dominate the susceptibility. The extended McConnell model was developed and provides the synthetic chemist with guidance for making new molecular materials to study cooperative magnetic coupling in systems. Assuming the electron-transfer excitation arises from the POMO, ferromagnetic coupling by the McConnell mechanism requires stable radicals (neutral, cations/anions, or ions with small diamagnetic counterions) with a non-half-filled POMO. The lowest excited state formed via virtual charge transfer (retro or forward) must also have the same spin multiplicity and mix with the ground state. These requirements limit the structure of a radical to D(2d) or C〉/=(3) symmetry where symmetry breaking distortions do not occur. Intrinsic doubly and triply degenerate orbitals are not necessary and accidental degeneracies suffice. To achieve bulk ferromagnetism, ferromagnetic coupling must be established throughout the solid and a microscopic model has been discussed. These requirements are met by [Fe(III)(C(5)Me(5))(2)].(+)[TCNE].(-). Additionally this model suggests that the Ni(III) and Cr(III) analogs should be antiferromagnetic and ferrimagnetic, respectively, as preliminary data suggest. Additional studies are necessary to test and further develop the consequences of these concepts. Some molecular/organic solids comprised of linear chains of alternating metallocenium donors (D) and cyanocarbon acceptors (A) with spin state S = 1/2 (...D.(+)A.(-)D.(+)A.(-)...) exhibit cooperative magnetic phenomena, that is, ferro-, antiferro-, ferri-, and metamagnetism. For [Fe(III)(C(5)Me(5))(2)].(+)[TCNE](-). (Me = methyl; TCNE = tetracyanoethylene), bulk ferromagnetic behavior is observed below the Curie temperature of 4.8 K. A model of configuration mixing of the lowest charge-transfer excited state with the ground state was developed to understand the magnetic coupling as a function of electron configuration and direction of charge transfer. This model predicts that ferromagnetic coupling requires stable radicals with a non-half-filled degenerate valence orbital and a charge-transfer excited state with the same spin multiplicity that mixes with the ground state. Ferromagnetic coupling must dominate in all directions to achieve a bulk ferromagnet. Thus, the primary, secondary, and tertiary structures are crucial considerations for the design of molecular/organic ferromagnets.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Miller, J S -- Epstein, A J -- Reiff, W M -- New York, N.Y. -- Science. 1988 Apr 1;240(4848):40-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17748820" 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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  • 7
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    Comment on "Computational improvements reveal great bacterial diversity and high metal toxicity in soil" (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-08-19
    Description: Gans et al. (Reports, 26 August 2005, p. 1387) provided an estimate of soil bacterial species richness two orders of magnitude greater than previously reported values. Using a re-derived mathematical model, we reanalyzed the data and found that the statistical error exceeds the estimate by a factor of 26. We also note two potential sources of error in the experimental data collection and measurement procedures.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Bunge, John -- Epstein, Slava S -- Peterson, Daniel G -- New York, N.Y. -- Science. 2006 Aug 18;313(5789):918; author reply 918.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Statistical Science, Cornell University, Ithaca, NY 14853, USA. jab18@cornell.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16917045" target="_blank"〉PubMed〈/a〉
    Keywords: Bacteria/genetics/*growth & development ; *Biodiversity ; DNA, Bacterial/*analysis ; Kinetics ; Mathematics ; Metals, Heavy/analysis/*toxicity ; Models, Biological ; Nucleic Acid Renaturation ; *Soil Microbiology ; Soil Pollutants/analysis/*toxicity ; Statistics as Topic
    Print ISSN: 0036-8075
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    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 8
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    Chemistry. Can droplets and bubbles think? (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-02-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Epstein, Irving R -- New York, N.Y. -- Science. 2007 Feb 9;315(5813):775-6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry and the Volen Center for Complex Systems, Brandeis University, Waltham, MA 02454-9110, USA. epstein@brandeis.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17289966" target="_blank"〉PubMed〈/a〉
    Keywords: Capillary Action ; Chemistry, Physical ; *Computing Methodologies ; *Microfluidic Analytical Techniques ; *Microfluidics ; Nonlinear Dynamics ; Physicochemical Phenomena ; Surface Tension
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
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  • 9
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    Chemistry. Emergent or just complex? (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-09-26
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Balazs, Anna C -- Epstein, Irving R -- New York, N.Y. -- Science. 2009 Sep 25;325(5948):1632-4. doi: 10.1126/science.1178323.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemical Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA. balazs@pitt.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19779180" target="_blank"〉PubMed〈/a〉
    Keywords: *Biochemical Phenomena ; Cells ; *Chemical Phenomena ; DNA/chemistry ; *Evolution, Chemical ; Origin of Life ; Software
    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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  • 10
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    Carbon isotopic evidence for different feeding patterns in two hyrax species occupying the same habitat (1978)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1978-09-08
    Description: The carbon-13/carbon-12 ratios of the carbonate and collagen fractions of bone of the sympatric hyrax species Procavia johnstoni and Heterohyrax brucei indicate that the former obtains most of its diet by grazing while the latter is primarily a browser. The carbon-13/carbon-12 ratios of these fractions in fossil bone will record information about diet if they have not been altered during diagenesis.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Deniro, M J -- Epstein, S -- New York, N.Y. -- Science. 1978 Sep 8;201(4359):906-8.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17729570" target="_blank"〉PubMed〈/a〉
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