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  • 1
    Electronic Resource
    Electronic Resource
    A RADIOACTIVE TRACER STUDY OF THE ADSORPTION OF FLUORINATED COMPOUNDS ON SOLID PLANAR SURFACES. II. C8F17SO2N(C2H5)CH2COOH (1960)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 64 (1960), S. 525-529 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100834a003
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ischämie/Reperfusionsschaden der Leber durch freie radikale — direkter radikalnachweis mittels elektronenspinresonanz (ESR) (1991)
    Springer
    Langenbeck's archives of surgery 376 (1991), S. 139-142 
    Details
    ISSN: 1435-2451
    Keywords: Oxygen radicals ; Reperfusion ; Liver ; Rat ; Electron-spin-resonance ; Spin trap PBN
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Freie Sauerstoffradikale werden als Kausalfaktor in einer Vielzahl von Erkrankungen, u. a. auch im postischämischen Reperfusionsschaden vermutet. Der Nachweis freier Radikale ist schwierig and wird in der Regel indirekt geführt. Mit der Elektronenspinresonanz gelingt es, in einem Tiermodell mit Leberischämie und -reperfusion das Auftreten von Radikalen im Lebergewebe nach 60minütiger Leberischämie nachzuweisen. Bereits nach 5minütiger Reperfusion treten vermehrte Radikale auf. Das Maximum der Radikalentstehung wird nach 15minütiger Reperfusion erreicht, wobei die übermäβige Produktion von freien Radikalen für mindestens 45 min Reperfusion nachweisbar bleibt. Soll these Kausalkette des postischämischen Reperfusionsschadens unterbrochen werden, müssen Fängermecha-nismen bereits zu Beginn der Reperfusion in ausreichender Konzentration im Gewebe vorhanden sein.
    Notes: Summary The generation of free oxygen radicals is presumed to be a pathogenetic principle in various conditions, primarily in postischemic reperfusion injury. Their assessment is difficult. ESR is an excellent tool to assess free radicals directly. 1n an experimental model of rat liver ischemia and reperfusion the increased generation of free radicals during reperfusion in liver tissue could be demonstrated after 60 min of liver ischemia. Elevated production rates of radicals could be detected after 5 min of reperfusion for at least 45 min with a maximum after 15 min of reperfusion. Scavenging of these radicals has to start in the very beginning of reperfusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00250337
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Oxygen radicals in liver ischemia and reperfusion — Experimental data (1991)
    Springer
    Journal of molecular medicine 69 (1991), S. 1095-1098 
    Details
    ISSN: 1432-1440
    Keywords: Liver ; Warm ischemia ; Reperfusion ; Oxygen radicals ; Allopurinol ; Deferoxamine ; Iron ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The generation of free oxygen radicals is presumed as a substantial pathogenetic principle in reperfusion injury. Although demonstrated in gut, muscle and kidneys its role in liver reperfusion injury is still under investigation. In an experimental rat model of warm liver ischemia of 60 min and 8 h reperfusion electron resonance spectroscopy assessed the increased generation of free radicals in early reperfusion period, leading to a decrease of polyunsaturated free fatty acids in liver tissue within 15 min of reperfusion. Histologically, single cell death, local and patchy necrosis of hepatic lobuli could be observed after 8 h reperfusion (n=6). These histologic signs of liver injury could be attenuated by administration of superoxid-dismutase in combination with catalase but not by allopurinol. Best results could be obtained by deferoxamine. This indicates that increased generation of free oxygen radicals in reperfusion is not caused by the known conversion of xanthine-dehygrogenase to -oxidase but is mediated by an increased generation of hydroxyl-radicals, which can be scavenged by deferoxamine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01645164
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  • 4
    Electronic Resource
    Electronic Resource
    Globally coupled dynamics of breathing current filaments in semiconductors (1992)
    Springer
    The European physical journal 89 (1992), S. 289-296 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Starting from a system of nonlinear transport equations describing the dynamics of a single breathing current filament, e.g. in the regime of low-temperature impurity breakdown in semiconductors, we introduce a simple nonlocal coupling mechanism for the description of two breathing filaments. It is based on the interaction of the two filaments via the external load circuit. We find that the model describes a selection mechanism allowing the survival of the originally larger filament only. Therefore, it can be considered a generalization of Ostwald ripening in thermodynamic equilibrium. Although the breathing instability is suppressed asymptotically, transient symmetric breathing of the filaments is possible due to a periodic repeller.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01318159
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  • 5
    Electronic Resource
    Electronic Resource
    Neue Synthesen der Ketenacetale und ihrer Derivate (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 76 (1964), S. 583-583 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19640761350
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Dry-developed organosilicon resists for 193-nm excimer laser lithography (1992)
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 32 (1992), S. 1595-1599 
    Details
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Irradiation of certain organosilicon polymers with a 193-nm excimer laser forms a latent image that contains increased amounts of oxygen. Patterning is achieved by dry development in an HBr plasma, where the oxidized polymer etches more slowly than the unexposed areas. With these polymers as the top layer in a bilayer resist scheme, 0.2 μm resolution has been demonsrated and resist sensitivities less than 50 mJ/cm2 have been achieved. Three classes of organosilicon layers have been investigated: polysilynes; polysilanes, in particular poly(phenylmethyl) silane; and a plasma-deposited polymer derived from tetramethylsilane (PPTMS). The PPTMS, when used with plasma-deposited planarizing layers, opens the possibility of an all-dry, cluster-tool-compatible lithographic cycle.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pen.760322109
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