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  • 1
    Electronic Resource
    Electronic Resource
    Is ''quality protein'' maize more susceptible than normal cultivars to attack by the maize weevil Sitophilus zeamais?
    Amsterdam : Elsevier
    Postharvest Biology and Technology 2 (1993), S. 349-358 
    Details
    ISSN: 0925-5214
    Keywords: Maize, weevil attack, quality protein ; Sitophilus zeamais ; Zea mais
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0925-5214(93)90039-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Directions for improving manual fire suppression using a physically based computer simulation (1986)
    Springer
    Fire technology 22 (1986), S. 184-209 
    Details
    ISSN: 1572-8099
    Keywords: Fire suppression ; postflashover fires ; mathematical modeling ; water spray ; fire development ; char ; pyrolysis ; heat flux
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Notes: Abstract The Swedish Fire Research Board and the U.S. Federal Emergency Management Agency are sponsoring a project to further the understanding of the basic mechanisms involved, as well as to support the development of standards for and to seek ways of improving the performance of portable fire suppression systems used by fire departments. This paper describes a physically based computer model developed to simulate one aspect of the problem: the manual suppression of postflashover fires. This includes: (1) an overview of the physical basis behind the model; (2) a comparison of model predictions with available experimental data, and (3) an analysis of fire suppression effectiveness using the model. The analysis concludes that, when direct access and extinguishment of the burning fuel is not possible, improved fire control occurs with water sprays having a Rosin-Rammler distribution of droplet sizes with volume-median-drop diameters in the 0.15 to 0.35 mm range. This agrees with available experimental data. It is also shown that fire fighting venting and standoff distance requirements may lead to more severe fires requiring more water for control; although venting and water spray induced air/gas flow also serve to channel hot steam and gases away from the fire fighter adding to his safety. The analysis also shows that allowing higher gas and surface temperatures at fire control through improved fire fighter protective clothing and equipment design reduces water flow rate requirements. Additional experimental work is recommended before all these conclusions are considered definitive.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01043124
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Kinetic studies on copolycondensation processes. IV. Chemical composition of copolycondensation products (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 23 (1979), S. 2409-2418 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: The kinetics of polycondensation and copolycondensation of terephthaloyl chloride with numerous bisphenols in α-chloronaphthalene solutions were examined. The values of activation energy E of the polycondensation processes were calculated. Isokinetic temperatures for different systems of monomers were determined. A series of syntheses of copolyesters at isokinetic temperature and other temperatures was carried out. The products obtained during the reaction were examined. It was found that at isokinetic temperature the composition of the products is independent of the extent of reaction, whereas at other temperatures it depends on the reactivity ratio of monomers used, as well as on the extent of reaction.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1979.070230818
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetic studies on copolycondensation processes. I. Kinetic equation of copolycondensation in solution (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 667-670 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: Based on the known composition equation of copolycondensation product, an equation was derived to describe the kinetics of the copolycondensation process. On the basis of the equation derived, a theoretical curve describing the course of the process was found. A satisfying agreement between the theoretical and experimental curves was observed.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070180303
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  • 5
    Electronic Resource
    Electronic Resource
    Einige Probleme der Kinetik der Hochtemperatur-Lösungscopolykondensation (1980)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 31 (1980), S. 564-567 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Based on the suggestions resulting from previous investigations of the kinetics of high temperature copolycondensation the process of the copolycondensation of terephthalic acid chloride with bisphenols in chloronaphthaline was analyzed. The change of concentration of individual functional groups and the change of the degree of copolycondensation were determined. The theoretical conclusions drawn from the experimental results are discussed.
    Notes: Auf Grund der in früheren Arbeiten angenommenen Voraussetzungen für die Kinetik der Hochtemperatur-Copolykondensation wurde der Verlauf der Polykondensation von Terephthalsäurechlorid mit Bisphenolen in α-Chlornaphthalin analysiert. Es wird sowohl die Änderung der Konzentration von einzelnen funktionellen Gruppen wie auch die Änderung des Polymerisationsgrades des erhaltenen Produktes bestimmt. Aus den experimentellen Ergebnissen werden theoretische Schlußfolgerungen über den Copolykondensationsverlauf diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1980.010310906
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    Paper (German National Licenses)
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