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  • 1970-1974  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Computer Simulation of Plant-Scale Multicolumn Adsorption Processes Under Periodic Countercurrent Operation (1972)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 11 (1972), S. 430-434 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260043a017
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Immunoferritin studies of Marek's disease virus directed intracellular and membrane antigens (1973)
    Springer
    Archives of virology 41 (1973), S. 59-65 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Intracellular and membrane antigens of Marek's disease virus (MDV) were studied by immunofluorescence and immunoferritin techniques. Sera from chickens surviving the disease and rabbits hyperimmunized with purified virus had antibodies to the envelope and the capsid of the virion and virus directed membrane antigens detected on the surface of infected cells. Indirect evidence suggests that the membrane antigen is related to the structural proteins of the virus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01249929
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A mechanistic study of oxygen transfer in aqueous systems (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 13 (1971), S. 271-292 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Oxygen transfer coefficients were evaluated for a 14-liter stirred tank fermentor equipped with an oxygen probe, employing elemental copper adsorbed on a weakly basic anion-exchange resin as a solid phase oxygen acceptor. The use of a solid phase oxygen acceptor allowed evaluation of mass transfer resistances associated with the solid phase, and the effect of an oxygen adsorbing solid phase on the overall oxygen transport system, portions of the oxygen transfer process that are neglected by the conventional sulfite oxidation method commonly employed. It was concluded from the data obtained that a transport pathway involving transfer of oxygen to particles present near the air-water interface was a significant oxygen transport pathway for the system studied. Oxygen probe measurements performed on the bulk liquid did not recognize this pathway, suggesting that data taken on biological systems by use of techniques involving oxygen concentration measurements in the bulk liquid may not give the true oxygen absorbing capacity of a system.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260130209
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Laminar forced-convection at small Prandtl numbers (1973)
    Springer
    Acta mechanica 17 (1973), S. 315-322 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Eine Korrektur der vonParlange für verschwindende Prandtl-Zahlen angegebenen allgemeinen Lösung wird durch direkte Verwendung der Verdrängungsdicke erzielt. Die allgemeinen Resultate werden auf die Strömung um einen Keil angewendet, wobei Wandtemperatur oder Wärmefluß an der Wand als Potenz des Abstandes von der Vorderkante angesetzt wird. Für einige Spezialfälle werden numerische Werte angegeben. Es wird gezeigt, daß diese Näherung für kleine Prandtl-Zahlen einfach ist und für praktische Zwecke hinreichend genaue explizite Ergebnisse liefert.
    Notes: Summary Through the direct use of displacement thickness a first-order correction to the general solution ofParlange, obtained for vanishing Prandtl number, is presented. The general solutions are applied to wedge flows with wall temperature or wall heat flux varying as a power of the distance from the leading edge. Data for some special cases are given. It is shown that the present small Prandtl number approximation is simple, explicit, and capable of yielding sufficiently accurate results for practical applications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01183764
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Development of a recovery process for novobiocin (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 533-549 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A periodic countercurrent whole beer process was developed for the recovery of novobiocin to eliminate the high cost of mycelium filtration and accompanying antibiotic losses in the filter cake. In such a process screened, but unfiltered, novobiocin fermentation beer is contacted with a special grade of an anionic-exchange resin in a series of specially designed, well mixed columns. Each column is fitted with a screen sized to retain resin within the column but allow the cells to press. Periodically the lead column is isolated from the column train, washed free of beer solids, and eluted. A freshly eluted column is placed in the trail position to allow countercurrent operation. The eluate is then processed to crystalline product.A mathematical model for the sorption of novobiocin was developed based on a suitable continuity equation and mass transfer and equilibrium relationships determined in the laboratory. Digital computations of this model correlated well with laboratory and pilot plant data, and predicted well the performance of the production units. This simulation has been in continued use to predict and reoptimize plant operation as process changes (such as improved beer titers, increased production rate, and the evaluation of superior ion-exchange resins) occurred or were anticipated.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150309
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    Paper (German National Licenses)
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