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  • 2010-2014  (18)
  • 1975-1979  (49)
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  • 1
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    Erratum: Process gg→h_{0} →γγ in the Lee-Wick standard model [Phys. Rev. D 77, 015012 (2008)] (2011)
    American Physical Society (APS)
    Details
    Publication Date: 2011-01-27
    Description: Author(s): F. Krauss, T. E. J. Underwood, and R. Zwicky [Phys. Rev. D 83, 019902] Published Wed Jan 26, 2011
    Keywords: D1
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Selective methylation of histone H3 variant H3.1 regulates heterochromatin replication (2014)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2014-03-15
    Description: Histone variants have been proposed to act as determinants for posttranslational modifications with widespread regulatory functions. We identify a histone-modifying enzyme that selectively methylates the replication-dependent histone H3 variant H3.1. The crystal structure of the SET domain of the histone H3 lysine-27 (H3K27) methyltransferase ARABIDOPSIS TRITHORAX-RELATED PROTEIN 5 (ATXR5) in complex with a H3.1 peptide shows that ATXR5 contains a bipartite catalytic domain that specifically "reads" alanine-31 of H3.1. Variation at position 31 between H3.1 and replication-independent H3.3 is conserved in plants and animals, and threonine-31 in H3.3 is responsible for inhibiting the activity of ATXR5 and its paralog, ATXR6. Our results suggest a simple model for the mitotic inheritance of the heterochromatic mark H3K27me1 and the protection of H3.3-enriched genes against heterochromatization during DNA replication.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4049228/" 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/PMC4049228/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Jacob, Yannick -- Bergamin, Elisa -- Donoghue, Mark T A -- Mongeon, Vanessa -- LeBlanc, Chantal -- Voigt, Philipp -- Underwood, Charles J -- Brunzelle, Joseph S -- Michaels, Scott D -- Reinberg, Danny -- Couture, Jean-Francois -- Martienssen, Robert A -- BMA-355900/Canadian Institutes of Health Research/Canada -- GM064844/GM/NIGMS NIH HHS/ -- GM067014/GM/NIGMS NIH HHS/ -- GM075060/GM/NIGMS NIH HHS/ -- R01 GM067014/GM/NIGMS NIH HHS/ -- R01 GM075060/GM/NIGMS NIH HHS/ -- R37 GM037120/GM/NIGMS NIH HHS/ -- R37GM037120/GM/NIGMS NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2014 Mar 14;343(6176):1249-53. doi: 10.1126/science.1248357.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Howard Hughes Medical Institute-Gordon and Betty Moore Foundation, Watson School of Biological Sciences, Cold Spring Harbor Laboratory, 1 Bungtown Road, Cold Spring Harbor, NY 11724, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24626927" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acid Sequence ; Arabidopsis/genetics/*metabolism ; Arabidopsis Proteins/*chemistry/metabolism ; Catalytic Domain ; Conserved Sequence ; Crystallography, X-Ray ; DNA Replication ; Epigenesis, Genetic ; Gene Expression Regulation, Plant ; Heterochromatin/*metabolism ; Histones/*metabolism ; Methylation ; Methyltransferases/*chemistry/metabolism ; Mitosis ; Molecular Sequence Data ; *Protein Processing, Post-Translational ; Threonine/metabolism
    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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  • 3
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    Neutralino-hadron scattering in the next-to-minimal supersymmetric standard model (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-08-10
    Description: Author(s): Sophie J. Underwood, Joel Giedt, Anthony W. Thomas, and Ross D. Young We provide a scan of the parameter space for neutralino-hadron scattering in the next-to-minimal supersymmetric standard model using an updated value for the strange quark sigma commutator. These results also take into account constraints from WMAP data on the relic density and new constraints from ... [Phys. Rev. D 86, 035009] Published Thu Aug 09, 2012
    Keywords: Beyond the standard model
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
    Electronic Resource
    Electronic Resource
    Quality of mass and intensity measurements from a high performance mass spectrometer (1979)
    s.l. : American Chemical Society
    Analytical chemistry 51 (1979), S. 1420-1425 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac50045a017
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  • 5
    Electronic Resource
    Electronic Resource
    Parathyroid hormone-responsive adenylate cyclase in induced transplantable osteogenic rat sarcoma (1976)
    [s.l.] : Nature Publishing Group
    Nature 260 (1976), S. 436-438 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Tumours were induced in Sprague-Dawley rats by injecting carrier-free 32P-orthophosphate according to a schedule which has been shown6 to lead to a high incidence of osteogenic sarcoma development. After an initial intra-peritoneal injection of 1 mCi per g body weight, six subsequent injections of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/260436a0
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  • 6
    Electronic Resource
    Electronic Resource
    Charcoal column separation of chlordane and toxaphene (1978)
    Springer
    Bulletin of environmental contamination and toxicology 20 (1978), S. 445-446 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01683546
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  • 7
    Electronic Resource
    Electronic Resource
    Separation of polychlorinated biphenyls from DDT and its analogs using chromic acid and silica gel (1979)
    Springer
    Bulletin of environmental contamination and toxicology 21 (1979), S. 787-790 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01685506
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  • 8
    Electronic Resource
    Electronic Resource
    Observations of the structure and evolution of solar flares with a soft X-ray telescope (1975)
    Springer
    Solar physics 45 (1975), S. 199-216 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract 132 soft X-ray flare events have been observed with The Aerospace Corporation/Marshall Space Flight Center S-056 X-ray telescope that was part of the ATM complement of instruments aboard Skylab. Analyses of these data are reported in this paper. The observations are summarized and a detailed discussion of the X-ray flare structures is presented. The data indicated that soft X-rays emitted by a flare come primarily from an intense well-defined core surrounded by a region of fainter, more diffuse emission. Loop structures are found to constitute a fundamental characteristic of flare cores and arcades of loops are found to play a more important role in the flare phenomena than previously thought. Size distributions of these core features are presented and a classification scheme describing the brightest flare X-ray features is proposed. The data show no correlations between the size of core features and: (1) the peak X-ray intensity, as indicated by detectors on the SOLRAD satellite; (2) the rise time of the X-ray flare event, or (3) the presence of a nonthermal X-ray component. An analysis of flare evolution indicates evidence for preliminary heating and energy release prior to the main phase of the flare. Core features are found to be remarkably stable and retain their shape throughout a flare. Most changes in the overall configuration seem to be the result of the appearance, disappearance or change in brightness of individual features, rather than the restructuring or re-orientation of these features. Brief comparisons with several theories are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00152232
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  • 9
    Electronic Resource
    Electronic Resource
    The analysis and interpretation of solar X-ray photographs (1977)
    Springer
    Solar physics 53 (1977), S. 417-433 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper discusses the methods used to analyse and interpret X-ray filtergrams obtained by solar soft X-ray telescopes such as the S-056 Skylab instrument. First, an appropriate definition of the line-of-sight emission measure ξ L(T) is developed, and it is shown how the X-ray data may be analysed to obtain an approximation to ξ L(T). The accuracy of this approximation is severely limited by the mathematical ill-conditioning of the problem, and additional constraints on the solutions must be imposed through the use of a specific model of the coronal region under study. Such a model is also required for the proper interpretation of the results in terms of coronal plasma processes. Examples of such models are provided and the forms of ξ L(T) derived from them compared with other, semi-empirical forms. The ‘filter ratio method’ (a simplified form of analysis in which the region under study is assumed isothermal) is discussed. It is shown that in the presence of line-of-sight temperature gradients, the values of ‘effective temperature’ and ‘emission measure’ yielded by this method cannot be directly related to the physical state of the plasma and so are of little utility in the study of coronal processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00160285
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  • 10
    Electronic Resource
    Electronic Resource
    A survey of coronal holes and their solar wind associations throughout sunspot cycle 20 (1978)
    Springer
    Solar physics 56 (1978), S. 161-183 
    Details
    ISSN: 1573-093X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract To gain insight into the relationships between solar activity, the occurrence and variability of coronal holes, and the association of such holes with solar wind features such as high-velocity streams, a study of the period 1963–1974 was made. This period corresponds approximately with sunspot cycle 20. The primary data used for this work consisted of X-ray and XUV solar images obtained from rockets. The investigation revealed that: (1) The polar coronal holes prominent at solar minimum, decreased in area as solar activity increased and were small or absent at maximum phase. This evolution exhibited the same phase difference between the two hemispheres that was observed in other indicators of activity. (2) During maximum, coronal holes occurred poleward of the sunspot belts and in the equatorial region between them. The observed equatorial holes were small and persisted for one or two solar rotations only; some high latitude holes had lifetimes exceeding two solar rotations. (3) During 1963–74 whenever XUV or X-ray images were available, nearly all recurrent solar wind streams of speed ⩾500 km s−1 were found associated with coronal holes at less than 40° latitude; however some coronal holes appeared to have no associated wind streams at the Earth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00152641
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