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  • 1
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Mean relative gas holdup, slip velocity, bubble size distribution, mean specific interfacial area, and volumetric mass transfer coefficient of oxygen were estimated in sparged columns 14 cm in diameter and 380 and/or 390 cm high with two different aerator types (porous plate and injector nozzle) in highly viscous Newtonian (glycerol solutions) and non-Newtonian (CMC solutions) fluids. For the Newtonian liquids the above properties were estimated as function of the viscosity of the liquid. For the non-Newtonian liquids they were determined as function of the fluid consistency index and flow behavior index. Significant differences between Newtonian and non-Newtonian systems appear. In Newtonian medium kL a drops with increasing viscosity and already approaches a constant value at η=40 cP. In pseudoplastic medium kL a varies with the fluid consistency and flow behavior indexes in the entire investigated range. In both of these systems the primary bubble population changes into two or three populations along the reactor: the medium bubbles gradually disappear and small and large bubbles are formed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-286X
    Keywords: Blasensäule ; Viskosität ; Fermentation ; Sauerstoff-Eintrag ; Gasanteil ; Stoffübergang ; Blasengröße ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Accounts of chemical research 9 (1976), S. 333-338 
    ISSN: 1520-4898
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of management studies 16 (1979), S. 0 
    ISSN: 1467-6486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The beliefs about work of managers and blue-collar workers in the U.S.A. and Scotland were determined through a questionnaire. Both managers and blue-collar workers strongly endorsed humanistic beliefs and were indifferent to the work ethic. Blue-collar workers endorsed more strongly than managers beliefs about worker exploitation and the value of participation. In Scotland, there was a wide difference in the perceived value of leisure between managers and workers. It appears that the Scottish respondents hold fewer independent beliefs than their U. S. counterparts.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of management studies 14 (1977), S. 0 
    ISSN: 1467-6486
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Personnel psychology 30 (1977), S. 0 
    ISSN: 1744-6570
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Psychology
    Notes: Studies in the early seventies suggested that the traditional work ethic position was changing and that the American worker was expressing new needs for interesting and challenging work. Current management practices in many companies are attempting to meet these new needs of workers for interesting jobs through a movement called human resource development. This suggests the need for research into the beliefs that inform this movement. The following study based on a sample of 366 managers shows that they have an orientation to work based on humanistic beliefs rather than the traditional work ethic position. Thus the new management style exemplified in the HRD movement may not simply be a push for increased performance, but may also be supported by a set of beliefs regarding the nature of work that is consistent with this style. This new orientation, however, does not include any positive beliefs relative to worker participation in decision-making. The latter is rejected very strongly by all the managers surveyed.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Archive for mathematical logic 18 (1977), S. 85-98 
    ISSN: 1432-0665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Archive for mathematical logic 17 (1975), S. 55-60 
    ISSN: 1432-0665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Archive for mathematical logic 17 (1975), S. 179-189 
    ISSN: 1432-0665
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-0711
    Keywords: Ovary, human, in vitro, pressure: intrafollicular, intraovarian, intraarterial ; PGF2α ; Catecholamines ; Oxytocine, methyl-xanthine ; Ovulation ; Menschliche Ovarien, in vitro Perfusion, intrafollikulärer, intraovarieller, intraarterieller Druck ; PGF2α ; Catecholamine ; Oxytozin, Methyl-Xanthin ; Ovulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung An in vitro perfundierten menschlichen Ovarien der Follikelreifungsphase wurden der intrafollikuläre, intraovarielle und arterielle hydrostatische Druck gemessen. Sowohl im Gefäßsystem, als intraovariell sind spontan auftretende Druckänderungen zu registrieren. Unter Adrenalin, Noradrenalin, Prostaglandin F2α und Oxytocin kommt es einmal zu einer zunehmenden Tonisierung des Gefäßsystems, zum anderen zu vermehrt auftretenden Spontankontraktionen, wobei vor allem unter Prostaglandin F2α und Catecholaminen eine Zunahme von Frequenz und Amplitude zu beobachten ist. Jede Druckerhöhung im ovariellen Gefäßsystem und Gewebe bewirkt in allen Follikeln, die sich noch nicht in der direkt präovulatorischen Phase befinden, ebenfalls einen Druckanstieg. Direkt präovulatorisch treten Druckerhöhungen im Follikel nicht mehr auf, die Volumenzunahme des Liquor folliculi geht dann mit einer zunehmenden Dehnbarkeit der Follikelwand parallel. Die Ergebnisse werden im Hinblick auf die biophysikalischen Aspekte der Ovulation besprochen.
    Notes: Summary The intrafollicular, intraovarian and intraarterial hydrostatic pressures were measured in vitro on human ovaries in the follicular ripening phase. It has been established that in the vascular system as well as in the intraovarian tissues pressure variations occur spontaneously. Thus for example under, the influence of epinephrine, norepinephrine, prostaglandine F2α and oxytocine, the tonicity of the vascular system increases and does so the number of spontaneous contractions rather noticeably, particularly under the influence of prostaglandine F2α, and under the various catecholamines an increase of frequency and amplitude has been observed. Any increase of pressure in the intraovarian vascular system and tissues will effect all the follicles not yet in the preovulatorian phase, in which they cause a similar pressure increase. However, follicles imminently preovulatorian have not shown such pressure increase because the increase of the “liquor folliculi” runs parallel to the increasing elasticity of the follicle walls. The findings are discussed in this article with a particular view of the biophysical aspects of ovulation.
    Type of Medium: Electronic Resource
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