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  • 1995-1999  (3)
  • 1996  (3)
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  • 1995-1999  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Surface tension in Ising systems with Kac potentials (1996)
    Springer
    Journal of statistical physics 82 (1996), S. 743-796 
    Details
    ISSN: 1572-9613
    Keywords: Interfaces ; Kac potentials ; surface tension ; Γ-convergence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider an Ising spin system with Kac potentials in a torus of ℤd,d〉-2, and fix the temperature below its Lebowitz-Penrose critical value. We prove that when the Kac scaling parameter γ vanishes, the log of the probability of an interface becomes proportional to its area and the surface tension, related to the proportionality constant, converges to the van der Waals surface tension. The results are based on the analysis of the rate functionals for Gibbsian large deviations and on the proof that they Γ-converge to the perimeter functional of geometric measure theory (which extends the notion of area). Our considerations include nonsmooth interfaces, proving that the Gibbsian probability of an interface depends only on its area and not on its regularity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02179792
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The stress-70 protein family in diplopods: induction and characterization (1996)
    Springer
    Journal of comparative physiology 165 (1996), S. 622-627 
    Details
    ISSN: 1432-136X
    Keywords: Cadmium ; Stress-70 ; hsp70 ; Two-dimensional gel electrophoresis ; Diplopod, Julus scandinavius
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract To induce stress-70 proteins (hsp70), adults of the millipede Julus scandinavius (Diplopoda) were exposed to leaf litter contaminated with different concentrations of Cd2+ (10, 30, 50 and 60 mg·kg-1 as CdCl2). The expression of hsp70 was investigated by semiquantitative and qualitative biochemical methods. After SDS-gel electrophoresis and Western blotting a subsequent digital image analysis showed that increasing dietary concentrations of Cd2+ resulted in elevated levels of hsp70, which in turn indicated proteotoxic condition. Qualitative results were obtained by two-dimensional gel electrophoresis. A stress-70 protein family, similar to that of other arthropods, was detected in Julus scandinavius: at least five different proteins with an approximate molecular weight of 68, 69, 70, 77, and 78 kDa could be distinguished after heat shock as well as after Cd2+ exposure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00301130
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Preparation, proton transport properties and use in gas sensors of thin films of zirconium phosphate with γ-layered structure (1996)
    Springer
    Ionics 2 (1996), S. 179-183 
    Details
    ISSN: 1862-0760
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Pellicular γ-zirconium phosphate (γ-ZP(p)), i.e. sheets made up entirely of oriented lamellae of Zr(PO4)(H2PO4)·2H2O (γ-ZP), have been obtained by filtering colloidal dispersions of exfoliated γ-ZP in water/acetone. The ac-conductivity of γ-ZP(p) and γ-ZP was measured in the temperature range 20/–20°C on samples previously conditioned at relative humidities between 90 and 5%. In both cases, the conductivity dependence on material hydration indicates the presence of a non-negligible bulk transport at low relative humidities. For each relative humidity the conductivity data have been parameterised on the basis of the Arrhenius equation. Activation energy and pre-exponential factor values suggest the presence of the same conduction mechanism in both materials. The conductivity of γ-ZP(p) measured by applying the electric field parallel to the sheets ranges from 3·10−4 to 1·10−5 S cm−1 for relative humidity decreasing from 90 to 11%, being an order of magnitude higher than that of γ-ZP. Since the pellicular and microcrystalline material have very similar surface areas (11–12 m2/g), the higher conductivity of γ-ZP(p) is mainly due to the preferred particle orientation parallel to the electric field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02376018
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    Paper (German National Licenses)
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