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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of thermal analysis and calorimetry 8 (1975), S. 289-294 
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé On propose une méthode pour déterminer les caractérististiques cinétiques des phénomènes d'ignition en faisant appel à la théorie de la combustion et en tenant compte de l'influence de la température sur les paramètres thermophysiques. On applique la méthode à la détermination de l'énergie d'activation de la magnésite. On montre qu'en tenant compte d'une relation linéaire entre la chaleur spécifique et la conductibilité thermique de la magnésite et de la substance de référence d'une part, ainsi que de la température d'autre part, la valeur de l'énergie d'activationE est beaucoup plus faible que celle que l'on obtient en supposant que les paramètres thermophysiques ne dépendent pas de la température.
    Abstract: Zusammenfassung Die aus der Verbrennungstheorie abgeleiteten «Entzündungs» Kriterien werden zur Bestimmung verschiedener kinetischer Kennzeichen mit von der Temperatur abhÄngenden thermophysikalischen Parametern vorgeschlagen. Die Ergebnisse der Anwendung der «Entzündungs» Kriterien zur Bestimmung des Aktivierungsenergiewertes von Magnesit werden vorgeführt. Den linearen Zusammenhang zwischen WÄrmekapazitÄt und WÄrmeleitfÄhigkeit, sowie die Referenz einerseits und die Temperatur anderseits in Betracht genommen, wird gezeigt, da\E viel niedriger ist als der Aktivierungsenergiewert, erhalten unter der Annahme, da\ die thermophysikalischen Parameter nicht von der Temperatur abhÄngig sind.
    Notes: Abstract The “Ignition” criteria taken from the theory of combustion are suggested for the determination of various kinetic characteristics with the thermophysical parameters depending upon the temperature. The result of application of the “Ignition” criteria to determine the activation energy of magnesite are presented. It is shown that on taking into account a linear relationship between the temperature and the heat capacity and the heat conductions of magnesite and the reference materialE proves to be much lower than the value of activation energy obtained with the assumption that the thermophysical parameters do not depend on it.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Journal of engineering physics and thermophysics 26 (1974), S. 505-508 
    ISSN: 1573-871X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An approximate solution of the nonlinear heat conductivity equation is obtained using a method proposed earlier. This solution is convenient for use in the “ignition” criterion.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of engineering physics and thermophysics 32 (1977), S. 718-720 
    ISSN: 1573-871X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A simplified procedure based on expansion in the neighborhood of an approximate solution is discussed for solution of the quasilinear heat-conduction equation.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Measurement techniques 28 (1985), S. 68-71 
    ISSN: 1573-8906
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The molecular-weight distributions of polyethylenes obtained on the soluble system (C2H5)2TiCl2Al(C2H5)2Cl in benzene, ethyl chloride, and 1,2-dichloroethane and on the heterogeneous system TiCl4Al(C2H5)2Cl in propane have been determined. 2. The polyethylene obtained on the (C2H5)2TiCl2-Al(C2H5)2Cl system in chlorine-containing solvents is characterized by low ratios of the weight-average to the number-average molecular weight (¯Mw√Mn=1.8–5.1) and the molecular-weight distribution has a bimodal nature. 3. A narrow molecular-weight distribution leads to a considerable enhancement of the physicomechanical properties of the polyethylene.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 3 (1983), S. 155-161 
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Electrophysical devices with standard sensors were used for measuring the principal electrophysical parameters of raw materials, microbiological suspension and biopreparations: their dielectric constant, tangent of dielectric loss angle, specific conductivity and duration of dielectric relaxation of the medium. The obtained characteristics proved ot be rather informative for monitoring different technological parameters of the biosynthesis. The applicability of electrophysical methods in monitoring the process of biosynthesis was substantiated with examples.The electrophysical methods provide a simple and reliable way of monitoring the technological parameters in technical microbiology.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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