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  • Springer  (1)
  • Wiley-Blackwell  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 125 (1994), S. 25-34 
    ISSN: 1434-4475
    Keywords: Polymers ; Energy transfer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Triplet-Triplet-Auslöschung von nach Masse fraktioniertenPVCA (M=3.6·103−1.4·106)-Toluol-Gläsern wurde mittels Phosphoreszenzmessungen untersucht, für Gläser vonPVCA undP2VN (M im Bereich 106) inMTHF wurde die Intensität der Phosphoreszenz und der verzögerten Fluoreszenz als Funktion der Anregungs-intensität untersucht. Es wird ein Überblick über T-T-Auslöschung in festen Lösungen aromatischer Polymerer gegeben und die Voraussetzungen für eine Theorie des Energietransportes und der Exciton-Exciton-Auslöschung diskutiert.
    Notes: Summary The triplet-triplet annihilation of mass fractionatedPVCA (M=3.6·103−1.4·106) in toluene glasses was studied by phosphorescence, for glasses ofPVCA andP2VN (order of M=106) inMTHF the intensity of phosphorescence and delayed fluorescence were studied as a function of the excitation intensity. A survey of T-T annihilation in solid solutions of aromatic polymers is given and requirements for a theory explaining low dimensional energy transport and exciton-exciton annihilation are pointed out.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 65 (1993), S. 1313-1317 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Ecological Balances as an Instrument for Product Evaluation. The predecessor of today's increasingly important ecological balances was the Limits of Growth Report published by the Club of Rome in 1972. Ecological balances cover mass and energy flows and emissions from the raw materials via intermediates all the way to the end products, as well as waste disposal. This also includes the balance of ecological activity at all stages. The components of ecological balances are goal definition, material balance, action balance, balance evaluation, and optimisation analysis. The advantages of ecological balances are their fundamental acceptance by industry and environmental protection groups, clarity and essentially objective assessment, and the possibility of application to systems, comparison of equivalent products, systems, and services and comparison of null variants. Problems encountered with ecological balances arise, for example, because of frequently inaccessible data basis and because of the system definition.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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