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  • Light-scattering  (2)
  • 13.10.+q  (1)
  • Anchihaline  (1)
  • Springer  (4)
  • Blackwell Publishing Ltd
  • Emerald
  • Oxford University Press
  • 1990-1994  (4)
  • 1960-1964
Collection
Keywords
Publisher
  • Springer  (4)
  • Blackwell Publishing Ltd
  • Emerald
  • Oxford University Press
Years
  • 1990-1994  (4)
  • 1960-1964
Year
  • 1
    Electronic Resource
    Electronic Resource
    Rheological measurements and light-scattering experiments of dilute solutions of high molecular polystyrene. Light-scattering of flowing polymer solutions (1991)
    Springer
    Colloid & polymer science 269 (1991), S. 1250-1256 
    Details
    ISSN: 1435-1536
    Keywords: Light-scattering ; flowing polymer solution ; dilute polymer solution ; orientation and deformation of macromolecules ; polystyrene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract We describe the behavior of dilute polymer solutions by means of light-scattering under shear flow. Solution properties of polystyrene in benzene over a wide range of molecular weight has been studied to determine the coefficientsa andK of the Mark-Houwink relationship and to estimate the rheological conditions with regard to light-scattering experiments of flowing polymer solutions. The investigations were carried out to measure the shear-rate dependence of macromolecules in solution, e.g., to observe an orientation and changing of the mean-square radius of gyration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00652533
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  • 2
    Electronic Resource
    Electronic Resource
    Bhabha to Møller cross section ratios in the energy range 2.15–2.45 MeV (1993)
    Springer
    The European physical journal 345 (1993), S. 79-88 
    Details
    ISSN: 1434-601X
    Keywords: 12.20.Fv ; 13.10.+q ; 14.80.Pb
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The cross sections for Bhabha and Møller scattering have been investigated in the energy range 2.1–2.4 MeV using monoenergetic positrons and electrons to search for hypothetical resonances superimposed to the continuum predicted by quantum electro dynamics. Bhabba-to-Mott, Møller-to-Mott and Møller-to-Bhabha cross section ratios were measured. The Bhabha-to-Mott ratios could be determined with statistical errors of typically 1% and remaining systematic errors not exceeding the statistical ones. No resonances in Bhabha scattering were observed. Limits for the intrinsic widths of hypothetical resonances are given. For the first time upper limits are deduced from our data for hypothetical resonances in the Møller scattering cross section in the MeV range. Additionally, Møller-to-Bhabha cross section ratios could be determined with good precision. A good agreement between the experimental and theoretical Møller-to-Bhabha ratios can be stated calling in question the recently predicted existence of series of narrow, unresolvable resonances in the Bhabha scattering cross section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01290343
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of Taylor vortex flow by means of laser light scattering (1992)
    Springer
    Rheologica acta 31 (1992), S. 274-282 
    Details
    ISSN: 1435-1528
    Keywords: Light-scattering ; flowing polymer solution ; dilute polystyrene solution ; Taylor-vortex ; solvent power
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract Rheological measurements and light-scattering experiments were performed on dilute solutions of high molecular polystyrene. We are able to describe the orientation behavior of chain molecules under shear flow by means of light-scattering. Beyond that these investigations of light-scattering of flowing polymer solutions are an useful and suitable tool for detection and characterization of Taylor vortex formation. We can estimate the appearance of these hydrodynamic instabilities, which overlay the laminar main flow and we can observe a typical influence of the solvent power on it.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00366506
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  • 4
    Electronic Resource
    Electronic Resource
    Biogeographic synthesis of the insular groundwater faunas of the (sub)tropical Atlantic (1994)
    Springer
    Hydrobiologia 287 (1994), S. 105-117 
    Details
    ISSN: 1573-5117
    Keywords: Anchihaline ; Tethys ; subterranean
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Anchihaline habitats occur most frequently in subsiding areas. Typically, they are populated by ancestors of marine origin. These ancestral forms have a much wider distribution in the open sea, thus their hypogean descendents occur in phenetically similar populations on various islands. On the contrary, on rising islands, marine ancestors stranded during the uplift and got isolated in brackish or fresh ground waters, giving rise to phenetic and genetic isolates in very restricted areas. They belong to old genera with a large ditribution (amphi-Atlantic or Tethyan) The stygofaunas of both rising and subsiding areas thus originated in the sea, but contrary to the often uttered suggestions, not in the deep-sea. Phenetic resemblance between deep-sea and anchihaline taxa may indicate common ancestry, but then it must be shallow-water ancestry for both, simply because no deep-sea species survived the two oxygen-crises in the early and mid-Tertiary.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00006900
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