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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Energy & fuels 3 (1989), S. 116-119 
    ISSN: 1520-5029
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Archive of applied mechanics 55 (1985), S. 30-44 
    ISSN: 1432-0681
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Summary The paper deals with basic concepts of high-frequency rolling contact problems of belted tyres. An algorithm is developed, analogous to a partial differential equation of first order, to describe elements of the path of every contact point. Using this algorithm nonstationary rolling together with slip and spin are treated. The theory of small disturbances leads to well known linear theories of rolling. Several computed examples, showing the dynamical behavior of the belt are presented.
    Notes: übersicht In der Arbeit werden Grundlagen zur Berechnung hochfrequenter RollzustÄnde dargestellt. Ausgehend von der kinematischen Beschreibung der Bahnkurven der Kontaktpunkte wird ein Algorithmus entwickelt, der der partiellen Differentialgleichung erster Ordnung für TransportvorgÄnge Äquivalent ist. InstationÄre RollzustÄnde in LÄngsschlupf, Querschlupf und Spin können damit ohne EinschrÄnkung auf Haften behandelt werden. Eine Störungsrechnung zeigt den Zusammenhang mit linearen Theorien. Einige Beispiele, die das dynamische Verhalten des Gürtels behandeln, werden durchgeführt.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Archives of dermatological research 279 (1986), S. 16-19 
    ISSN: 1432-069X
    Keywords: PUVA treatment ; Lymphoid cells ; Fast-mixing short-illumination technique ; Nitrogen laser ; Psoriasis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Results of previous investigations have indicated that photochemotherapy (PUVA) attacks membranes of target cells. Using the combination of a stopped-flow technique and laser irradiation we were able to prove that the fast PUVA effect is explainable solely by the membrane damage. Lymphoid cells of healthy persons or psoriatics were taken, within 1 ms mixed with 8-methoxy-psoralen (8-MOP) at concentrations of 1.0, 0.1, and 0.05 μg/ml, and then irradiated by a 337-nm laser pulse (0.5 mJ/cm2) lasting some picoseconds. Approximately 1 ms after administration of 8-MOP to the cell surface at least 10% of the cells were damaged, as could be judged using the standard trypan blue exclusion test. This happened at 8-MOP concentrations of 1.0 or 0.1 μg/ml plus laser irradiation, but a concentration of 0.05 μg/ml 8-MOP plus laser exposure did not cause any effect within 8 ms after mixing. There was no difference between using lymphoid cells from healthy persons or from psoriatics. The fact that only a very short time is necessary before cell damage occurs means that, as far as the fast PUVA effect is concerned, a photochemical reaction involving nuclear DNA can be discounted.
    Type of Medium: Electronic Resource
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