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  • 1970-1974  (3)
  • 1870-1879
  • General Chemistry  (2)
  • Chemical Engineering  (1)
  • Documentation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 16 (1970), S. 916-924 
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The time optimal control problem for jacket cooled continuous flow stirred tank reactor (CSTR) with an exothermic, irreversible, second-order, homogeneous, liquid-phase reaction (the saponification of ethyl acetate) was solved with the maximum principle and phase plane analysis. Both experimental studies and analogue computer simulation studies were conducted.The overall performance of the experimental system agreed very well with the performance of the corresponding system simulated on an analogue computer. However, there were enough differences in the observed and predicted operating states and switching curves to warrant the conclusion that the experimental performance can be significantly improved if experimental results are used to modify the results predicted with computer analysis. These differences were attributed to uncertainties in the model and the values of the model parameters as well as nonrandom (and unforeseen) measurement errors.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 82 (1970), S. 598-605 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Das Dokumentations-System der Internationalen Dokumentationsgesellschaft für Chemie mbH (IDC) arbeitet mit Mitteln der elektronischen Datenverarbeitung. Es können Strukturen, Reaktionen und Sachverhalte gespeichert und recherchiert werden. Strukturen und Reaktionen werden als Terms einer Facettenklassifikation codiert, Sachverhalte im Klartext gespeichert. Zur Zeit sind 900000 Formeln, darunter zahlreiche Markush-Formeln, aus Patent- und Zeitschriftenveröffentlichungen auf Magnetband gespeichert. Die Recherche in diesem Bestand geschieht mit IDC-Programmen, die pro Frage durchschnittlich weniger als 1 Minute Computerzeit (CPU-Zeit) benötigen. Die Strukturterms können maschinell aus topologischen Einspeicherungen erzeugt werden. Erfaßt wird die niedermolekulare organische Chemie; eine Erweiterung auf das Makromolekulargebiet ist möglich und vorgesehen.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 9 (1970), S. 576-583 
    ISSN: 0570-0833
    Keywords: Documentation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The documentation system operated by the IDC Internationale Dokumentationsgesellschaft für Chemie mbH uses electronic data processing methods. It allows the storage and retrieval of structures, reactions, and nonstructural keyword information. Structures and reactions are coded as terms of a faceted classification, while keywords are stored in clear text. 900000 formulas from patent and journal publications, including many Markush formulas, have now been stored on magnetic tape. Searches in this store are carried out with IDC programs, which require an average computer time of less than 1 minute per inquiry (CPU time). The structure terms can be produced by computer from topological records. The field covered at present is low molecular weight organic chemistry, though extension to macromolecular chemistry is feasible, and is in fact planned.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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