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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
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    Ithaca, N.Y. : Periodicals Archive Online (PAO)
    Industrial and Labor Relations Review. 31:4 (1978:July) 450 
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  • 7
    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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  • 8
    ISSN: 1432-1440
    Keywords: Programmable infusion apparatus ; Stable and unstable diabetes ; Continuous intravenous insulin therapy ; Metabolic control ; Continuous glucose determination ; Hyperlipoproteinemia type IV ; Programmierbares Infusionsgerät ; Stabiler und instabiler Diabetes mellitus ; Kontinuierliche, gesteuerte Insulininfusion ; Stoffwechseleinstellung ; Kontinuierliche Glucosemessung ; Hyperlipoproteinämie, Typ IV
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Mit Hilfe eines programmierbaren Infusionsgerätes wurden zwei Gruppen von insulinpflichtigen Diabetikern über zwei bis vier Tage kontinuierlich mit Insulin eingestellt. Gleichzeitig wurde die Blutglucosekonzentration entweder laufend mit dem Autoanalyzer registriert oder intermittierend in 1–2stündigen Intervallen gemessen. Als Index für die Stoffwechseleinstellung wurde die mittlere Blutglucose (MBG) und die mittlere Amplitude der Blutzuckerausschläge (MAGE) während einer Vorperiode nach optimaler klinischer Einstellung, der Infusions-periode und einer Nachperiode, wiederum unter konventioneller Injektionstherapie, bestimmt. Bei stabilen (N=7) wie instabilen (N=10) Diabetikern kam es unter der kontinuierlichen intravenösen Therapie, gemessen an den Werten für MBG und MAGE, zu einer signifikanten Verbesserung der Einstellung, die in einer Reihe von Fällen einem physiologischen Schwankungsbereich entsprach. Bei der Gruppe der instabilen lag die mittlere Insulindosis bei i.v. Applikation signifikant über dem der Vor- und Nachperiode, während bei den stabilen Patienten kein Unterschied bestand; dabei wurden im Gegensatz zu den Kontrollperioden keine deutlichen hypoglykämischen Reaktionen registriert. Bei einer weiteren Diabetikerin mit Hyperlipoproteinämie Typ IV kam es während einer viertägigen intravenösen Insulintherapie zu einem Abfall der freien Fettsäuren, der Triglyceride und des Cholesterins. Die Ergebnisse zeigen, daß es durch die Imitation natürlicher Sekretionsprofile gelingt, unter kontrollierten Bedingungen Diabetiker besser als mit den üblichen Methoden einzustellen. Die gesteuerte intravenöse Insulinzufuhr scheint (nach Miniaturisierung) eine realisierbare Zwischenlösung auf dem Weg zu einem regulierten System, der „künstlichen B-Zelle“, darzustellen.
    Notes: Summary Two groups of insulin-dependent diabetics were controlled with the help of a pre-programmed continuous intravenous insulin infusion during 2–4 days. Blood glucose concentration was measured either continuously by the Autoanalyzer or at 1 to 2 h intervals. Mean blood glucose (MBG) and mean amplitude of glycemic excursions (MAGE) served as indices of metabolic control during a pre-infusion period at which optimal clinical control was sought, during the infusion and a post-infusion period, again under conventional therapy. In stable (N=7) as well as unstable (N=10) diabetics continuous intravenous therapy led to a significantly better control as judged by MBG and MAGE, in a number of cases within a physiological range. In the unstable group, the mean i.v. dose was significantly higher as compared to the pre- and postinfusion period, whereas there was no change in the stable patients. In contrast to the control periods, no significant hypoglycemic reactions were observed during insulin infusion. In a diabetic with hyperlipoproteinemia type IV a fall of free fatty acids, triglycerides and cholesterol was found during four days of intravenous insulin therapy. The results show that by imitation of physiological secretion profiles diabetics can be better controlled than by conventional methods. Controlled intravenous insulin therapy (after miniaturization) appears to be a feasible intermediary step on the way to the implantable ‘artificial B-cell’.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 62 (1975), S. 530-530 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Naturwissenschaften 66 (1979), S. 381-389 
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Notes: Abstract The coexistence of O2 and H2S in recent microbial mats is demonstrated. Oxygen and H2S are not only coexisting in considerable concentrations within recent stromatolites but high concentrations of the respective gases occur in alternating laminae. This “sandwich structure” is produced by alternating populations of oxygenic and anoxygenic photosynthetic bacteria and cyanobaeteria. The finding of such conditions may explain the alternation of oxidized and reduced iron minerals in Precambrian stromatolites and possibly also in the banded iron formations (BIFs).
    Type of Medium: Electronic Resource
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