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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Electrical engineering 71 (1988), S. 19-25 
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Übersicht Nach einer kurzen historischen Übersicht der Versuche einen dreiphasigen Elektroden-Salzbadofen zu projektieren und seine Abmessungen zu berechnen, wenden die Verfasser die Theorie der dreiphasigen Übertragungsleitung mit gleichmäßig verteilten Parametern auf die Erscheinungen im Elektroden-Salzbad-Ofen an. Mit Hilfe notwendiger Randbedingungen und zulässigen Vernachlässigungen werden die Formeln für die am meisten verbeiteten Ofentypen hergeleitet, die die Berechnung der Eingangsadmittanz und der Anschlußleistung des Ofens wie auch andere wichtige elektrische Größen ermöglichen.
    Notes: Contents After a short historical survey of the attempts to solve the problem of designing and determining the dimensions of a three-phase electrode salt-bath furnace, the authors apply the theory of the three-phase transmission line with uniformly distributed parameters to the phenomena in the electrode furnace. Taking all necessary boundary conditions and permissible simplifications, formulae for most widely sprcad types of the furnaces are derived, which allow the calculation of input admittance and input power of the furnace, as well as other important electric quantities.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-072X
    Keywords: Substrate uptake ; Energy requirement ; Endogenous respiration ; Nonmetabolized substrate ; Induced catabolism ; Rhodotorula glutinis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Uptake of the nonmetabolizable sugars 6-deoxy-d-glucose, l-rhamnose and l-xylose, which are taken up by a common carrier, stimulated significantly cell respiration in Rhodotorula glutinis. The extra oxygen consumption for uptake (0.5–0.7 equivalents O2/mol transported sugar) was proportional to the uptake rate and was independent of the K tvalue of the transport system. Sugars that become metabolized after induction, d-arabinose and methyl-α-d-glucoside, caused a higher stimulation, 1.4 and 3.6 equivalents O2/mol respectively, which was reduced to 0.6 equivalents O2/mol when de novo protein synthesis was blocked by cycloheximide. The stimulation of respiration thus includes a fraction related purely to the energy demand for uptake and another one related to the induced de novo protein synthesis. The net uptake-induced respiration boost was similar with all sugars under study irrespective of their transport systems. The estimated energy demand was equivalent to about 2 ATP/sugar molecule. For comparison, the amino acid analogue α-aminoisobutyric acid (AIB) was also investigated; the overall energy demand for its uptake corresponded to the equivalent of about 4 ATP/molecule.
    Type of Medium: Electronic Resource
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