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  • 1975-1979  (26)
  • 1979  (26)
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  • 1975-1979  (26)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 257 (1979), S. 335-335 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 257 (1979), S. 335-335 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 35 (1979), S. 1677-1678 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Prolactin secretion inhibition and changes in striatal dopamine metabolism in rats were compared after the administration of 8a-amino-ergoline CH 29-717 and 2 derivates. CQ 32-084 was similar to but less potent than CH 29-717. while 32-085, the 1-methyl derivative, showed delayed dopaminomimetic effects.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 35 (1979), S. 503-504 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A severe potentiating effect of methyl-ethyl-ketone (MEK) on the peripheral and central neurotoxicity of n-hexane could be demonstrated in a chronic inhalation study in rats.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 36 (1979), S. 121-126 
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study a lattice gas model for the incoherentα-β phase transition in PdH x . The model includes the elastic interaction and a screened Coulomb interaction between protons. The phase diagram of the dissolved hydrogen is calculated with Monte-Carlo techniques and compared with experimental results.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 14 (1979), S. 500-502 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied climatology 27 (1979), S. 297-324 
    ISSN: 1434-4483
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Description / Table of Contents: Summary Measurements of the shortwave radiation near the mean equilibrium line of Hintereisferner (Ötztal alps, 2960 m) during the main ablation period (July–September) 1971 are discussed. Supplementary, weather observations were carried out which permitted to relate the components of the radiation balance to synoptic conditions. During the three months investigated, the sums of global radiation of an overcast day were half as large as that of sunny days, on the average. Compared to a valley station (Innsbruck) the high mountain station receives significantly more global radiation, expecially on overcast days. As is shown in numerous examples the most important factor for the radiation balance is the reflectivity (albedo) of the snow surface which depends directly on the weather conditions. During the 1971 measuring period albedo values range from 95% for fresh snow fallen at temperatures below freezing down to 15% for heavily contaminated ice. Surface conditions being equal, higher values of albedo are found under overcast conditions than with clear sky. The observed daily variations of albedo are determined by the physical properties of the snow. Also, the reflectivity of the snow is a function of the wave length and therefore of the spectral composition of the incoming radiation. On overcast days there were no detectable daily variations of the albedo whereas on clear days daily variations up to 40% were measured, depending on the type of snow.
    Notes: Zusammenfassung Es werden die Messungen des Strahlungshaushaltes in der Nähe der mittleren Gleichgewichtslinie am Hintereisferner in den Ötztaler Alpen (2960 m) während der Hauptablationsperiode (Juli–September) 1971 behandelt. Die Strahlungsmessungen wurden durch Wetterbeobachtungen ergänzt, um über die Erstellung einer Energiebilanz hinaus, die Verbindung des Strahlungshaushaltes mit synoptischen Größen untersuchen zu können. In den drei Monaten war die Tagessumme der Globalstrahlung an stark bewölkten Tagen im Mittel noch halb so groß wie die an Strahlungstagen. Der Vergleich mit einer Talstation (Innsbruck) ergibt insbesondere an trüben Tagen eine deutliche strahlungsmäßige Bevorzugung des Hochgebirges. Die für den Strahlungshaushalt wichtigste Kenngröße ist das Reflexionsvermögen (Albedo) der Schneeoberfläche, das direkt von der Witterung abhängt, was an zahlreichen Beispielen gezeigt werden kann. Die für die verschiedenen Schneearten festgestellten Albedowerte reichen von 95% für Neuschnee, der bei negativen Temperaturen gefallen ist, bis zu 15% für stark verschmutztes Eis. Bei bedecktem Himmel wurden bei sonst gleichbleibender Oberflächenbeschaffenheit höhere Albedowerte gemessen als bei wolkenlosem Himmel. Für die Schwankungsweite der Tagesgänge der Albedo sind die physikalischen Eigenschaften des Schnees entscheidend. Außerdem ist die Reflexion des Schnees eine Funktion der Wellenlänge und damit der spektralen Zusammensetzung der einfallenden Strahlung. An stark bewölkten Tagen war keine Tagesschwankung der Albedo nachweisbar, während an heiteren Tagen, je nach Schneeart, Tagesschwankungen bis zu 40% gemessen wurden.
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  • 9
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 17 (1979), S. 3315-3328 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polymeric methacrylates functionalized with free methacryloyl groups are efficiently crosslinked in the presence of transition-metal carbonyls on UV irradiation of the polymeric solid. The reaction proceeds by a radical chain mechanism with a kinetic chain length of about 10 in a solvent-free polymer containing 10-3 mole of methacryloyl groups per cm3. The chain length increases steeply when the glass transition of the polymer is reached, either by plastification or by an increase in temperature. The temperature dependence of the crosslinking yield below the glass transition is consistent with an activation energy of about 9 kcal mole-1. The addition of acrylic monomers enhances chain propagation by up to an order of magnitude. Postirradiative crosslinking in the matrix comes to a standstill well before all acrylic groups or radicals have been exhausted: if, after cessation of the primary reaction, the matrix is briefly heated, a second crop of crosslinks is obtained without further exposure. The system behaves thus as if the radicals had been removed into traps from which they can be set free by thermal activation. From an analysis of the reaction kinetics it appears that in the glassy polymer 90% of the radicals are inactivated in this way. Radical recombination, however, is the principal mechanism of chain termination above the glass transition. From the kinetic data, diffusion coefficients for polymer-bound groups are found to be in the range of 10-17-10-16 cm2 sec-1 in the glassy polymer at room temperature. They are of the order of 10-14 cm2 sec-1 in plasticized films above the glass transition.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 13 (1979), S. 821-824 
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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