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  • 1980-1984  (4)
  • 1983  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Effect of Water Activity and Moisture Content on the Stability of Beet Powder Pigments (1983)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 48 (1983), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The effect of water activity (“dry”– 0.84) and moisture content on the stability of beet pigments (betanine and vulgaxanthine I) was investigated in beet powder stored at 35°C. Pigment deterioration followed a first order reaction. Water activity and moisture content had a pronounced exponential effect on pigment stability. A decrease of approximately one order of magnitude in pigment stability was observed when aw was increased from 0.32 to 0.75. Storing the powder at aw of 0.12 or below resulted in practically no deterioration of the pigments over a period of several months. Profound differences in pigment stability were attributed to sorption hysteresis and system composition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1983.tb14879.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Naturally occurring hemagglutinins in the hemolymph of the scorpionParuroctonus mesaensis Stahnke (1983)
    Springer
    Cellular and molecular life sciences 39 (1983), S. 721-722 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Lectins which bind sialic acid-containing receptors are present in the hemolymph of the scorpionParuroctonus mesaensis Stahnke. Glycoproteins like bovine submaxillary mucin, fetuin and human orosomucoid behave as strong inhibitors forParuroctonus lectins; desialylation of glycoproteins results in a drastic reduction of their inhibitory capabilities confirming that sialic acids are the terminal monosaccharides ofParuroctonus lectin receptors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01990291
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The Clausius-Mossotti formula and its nonlocal generalization for a dielectric suspension of spherical inclusions (1983)
    Springer
    Journal of statistical physics 33 (1983), S. 241-260 
    Details
    ISSN: 1572-9613
    Keywords: Clausius-Mossotti formula ; cluster expansion ; random media ; dielectric ; suspectibility ; nonlocal
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Employing a recently developed cluster expansion for the effective dielectric constant of a suspension of spherical inclusions, we show which parts of the cluster integrals give rise to the Clausius-Mossotti formula. The same selection of terms is then used to obtain an approximate expression for the wave-vector-dependent effective dielectric tensor. For a system of hard spheres with only dipole polarizability this expression is evaluated in closed form. This last result is then used to derive the form of the electrostatic potential due to a point charge in the effective medium. For physically reasonable values of the polarizability, the potential has asymptotically the form corresponding to a medium with the Clausius-Mossotti dielectric constant, while at short range it oscillates about this form. For values of the polarizability beyond the physical range critical points are found at which the oscillations become long range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01009796
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetic theory of fluctuations near a convective instability (1983)
    Springer
    Journal of statistical physics 33 (1983), S. 639-694 
    Details
    ISSN: 1572-9613
    Keywords: Kinetic theory ; Rayleigh-Bénard cell ; mode coupling ; correlation functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The kinetic theory of density and velocity fluctuations below and above the first convective instability in a Benard cell is presented. Results are given in a form valid for all fluid densities. In particular, the singular behavior near the instability point is computed and a detailed comparison with that near a critical point is made. Mode coupling effects, involving the viscous and the heat mode, that determine the singular behavior of the thermal conductivity near the critical point, are also responsible for the singular behavior of the pair correlation function and in particular the density-density correlation function near the instability point. The anomalous density fluctuations could be measured directly by microwave scattering experiments, while the velocity fluctuation could be measured by laser Doppler velocimetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01018838
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    Paper (German National Licenses)
    Fulltext
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