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  • 1
    Electronic Resource
    Electronic Resource
    Production of L-malate from fumarate by the yeast Dipodascus magnusii (1999)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 19 (1999), S. 357-363 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: An alternative microbiological method for the production of malate from fumarate is presented. The yeast Dipodascus magnusii was used for this bioconversion.The optimum cell growth temperature was 28°C and the working volume 120 ml. The highest level of fumarase activity during bioconversion was achieved at a pH of 7.5 and a temperature of 37°C. These conditions were determined as optimal. Using sodium fumarate (1M), the maximum specific productivity of malic acid obtained was 1.72 g/(gDCW × h) for intact cells. In the case of ammonium fumarate, it was 2.25 g/(gDCW × h).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370190413
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Importance of invertase activity for gluconic acid production from sucrose by aspergillus niger (1992)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 12 (1992), S. 311-317 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The excretion, cellular distribution and pH profiles of invertase in Aspergillus niger CCM 8004 were characterized. An optimized pH control was proposed for conversion of sucrose to gluconic acid and fructose: pH was maintained at 4.5 until the 12th hour and at 5.5 from the 12th hour of fermentation. 300 g · dm3 of sucrose was converted within 31 hours by this procedure.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370120411
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Optimization of sorbose production from sorbitol by Gluconobacter oxydans (1993)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 13 (1993), S. 269-274 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The basic parameters were studied influencing the conversion of orbitol to sorbose by Gluconobacter oxydans(industrial strain from FARMAKON Co., Czechoslovakia). The most effective conversion in the stationary phase was reached at pH 5.0, no inhibitory effect of sorbitol in a concentration ranging from 20 to 200 g/l and a minimum inhibitory effect of the sorbose concentration up to 200 g/l were observed. According to the optimum conditions mentioned above the optimized course of the fed-batch cultivation was proposed. The final concentration of sorbose of 410 g/l was reached after 36 hours.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370130307
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Nonspecific and specific diffusion channels in the outer membrane of escherichia coli (1980)
    New York, N.Y. : Wiley-Blackwell
    Journal of Supramolecular Structure 13 (1980), S. 305-313 
    Details
    ISSN: 0091-7419
    Keywords: Life Sciences ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jss.400130304
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Improved ethanol production from whey with Saccharomyces cerevisiae using permeabilized cells of Kluyveromyces marxianus (1995)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 15 (1995), S. 387-390 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Permeabilized cells of Kluyveromyces marxianus CCY eSY2 were tested as the source of lactase in the ethanol fermentation of concentrated deproteinized whey (65-70 g/l lactose) by Saccharomyces cerevisiae CCY 10-13-14. Rapid lactose hydrolysis by small amounts of permeabilized cells following the fermentation of released glucose and galactose by S. cerevisiae resulted in a twofold enhancement of the overall volumetric productivity (1.03 g/l × h), compared to the fermentation in which the lactose was directly fermented by K. marxianus.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370150413
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Physiological restriction of the L-lactic acid production by Rhizopus arrhizus (1995)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 15 (1995), S. 367-374 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: The influence of basic physiological factors on the quality of inocula and L(+)-lactic acid production by Rhizopus arrhizus CCM 81 09 were studied.The most effective preparation of the spores (5 × 107 spores/ml) and subsequent good lactate production was achieved on the agar medium with soil extract and malt agar. The optimum initial amount of active spores for inoculation was 103-104 spores/ml. The preparation of inoculum required intensive stirring with lower aeration and pH maintained in the range from 4.8 to 6.0 by the addition of CaCO3. The maximum yield of lactic acid production was achieved by using 5% (v/v) of 24-h-old inoculum. The intensity of lactic acid production in the inoculum was proportional to its production in the subsequent steps of fermentation and can be used as a fast control of the physiological state of the producers.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370150409
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    Paper (German National Licenses)
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