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  • 1
    Electronic Resource
    Electronic Resource
    Sulfate reduction and anaerobic glycerol degradation by a mixed microbial culture (1991)
    Springer
    Current microbiology 22 (1991), S. 47-52 
    Details
    ISSN: 1432-0991
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Anaerobic glycerol degradation by a mixed microbial culture from a fermenter fed with industrial alcohol distillation waste water, was investigated in the absence or presence of sulfate, at 37°C and at a constant pH of 7.2. In the absence of sulfate, glycerol utilization was found to be characterized by the transient formation of 1,3-propanediol prior to propionate and acetate accumulation. In the presence of sulfate, 1,3-propanediol production was minor, and the carbon balance reflected a considerable accumulation of intermediate(s). A study of the role of sulfate reduction and methanogenesis on anaerobic 1,3-propanediol degradation showed that consumption of this substrate by the mixed microbial culture required a terminal electron acceptor. The number of fermentative and sulfate-reducing bacteria with glycerol or 1,3-propanediol as carbon and energy source revealed that sulfate-reducing bacteria outcompete fermentative bacteria for these substrates. The possible ecological role of sulfate-reducing bacteria in the metabolism of these reduced substrates is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02106212
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Uncoupled glycerol distribution as the origin of the accumulation of 3-hydroxypropionaldehyde during the fermentation of glycerol by Enterobacter agglomerans CNCM 1210 (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 58 (1998), S. 303-305 
    Details
    ISSN: 0006-3592
    Keywords: glycerol ; Enterobacter agglomerans ; 3-hydroxypropionaldehyde ; catabolic limitation ; inhibition ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Batch fermentation of glycerol to 1,3-propanediol (1,3PPD) by Enterobacter agglomerans CNCM 1210 showed the lethal accumulation of 3-hydroxypropionaldehyde (3-HPA) when performed under initial substrate content higher than 40 g/L. Assigned to the inhibition by the NAD/NADH ratio of the 3-HPA converting enzyme: 1,3PPD dehydrogenase, intracellular assays were conducted in an attempt to identify the metabolic mechanisms involved in the increase of that ratio. An overflow metabolism through the 1,3PPD formation pathway was established, while a catabolic limitation in the oxidative branch at the level of glyceraldehyde-3-phosphate dehydrogenase occurred. Uncoupled activities of synthesis and consumption of reducing equivalents are thus suspected to provoke the increase of the NAD/NADH ratio and the subsequent accumulation of 3-HPA. © 1998 John Wiley & Sons, Inc. Biotechnol Bioeng 58:303-305, 1998.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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