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  • 1
    Electronic Resource
    Electronic Resource
    Continuous culture of Streptococcus cremoris on lactose using various medium conditions (1989)
    Springer
    Applied microbiology and biotechnology 32 (1989), S. 155-159 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Growth of a lactic streptococcus was studied in continuous cultures, under various conditions of medium richness, without carbon source limitation, and with a large range of dilution rates. Increasing the concentrations of growth factors and protein nitrogen sources resulted in increased volumetric productivities of biomass and lactic acid with maximum values in the 0.3–0.4 h−1 dilution rate range. Growth was shown to be dependent on both the inhibitory effect of lactic acid and the availability of certain nutrients, as has previously been shown for batch cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00165880
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Solvent production from starch: effect of pH on α-amylase and glucoamylase localization and synthesis in synthetic medium (1992)
    Springer
    Applied microbiology and biotechnology 37 (1992), S. 539-543 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The fermentation of starch by Clostridium acetobutylicum ATCC 824 has been reviewed in an optimised synthetic medium. A progressive increase of pH from 4.4 to 5.2 led to a higher production of extracellular α-amylase whereas glucoamylase was poorly affected. A portion of these enzymes was cell-associated and on increasing the pH from 4.4 to 5.8 a decrease was noted in cell-bound enzymes. The association was higher for the glucoamylase than for the α-amylase. The highest rate of starch consumption was at pH 5.2 whereas due to the earlier shift to solvent production at low pH, the highest solvent production was at pH 4.4. This study suggested that the level of α-amylase and then the rate of starch hydrolysis was the limiting step of sugar catabolism in C. acetobutylicum ATCC 824.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240721
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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