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  • 1980-1984  (10)
  • 1
    Electronic Resource
    Electronic Resource
    Bacteria-induced de-emulsification of water-in-oil petroleum emulsions (1983)
    Springer
    Biotechnology letters 5 (1983), S. 725-730 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The de-emulsifying ability of two bacteria (i.e.,N. amarae andC. petrophilum) has been demonstrated on water-in-oil petroleum field emulsions. De-emulsification by whole cultures and by washed cells was correlated with changes in the culture during growth. For each species, there was a particular growth phase which produced a species-dependent de-emulsification optimum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01386492
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  • 2
    Electronic Resource
    Electronic Resource
    Kinetics of ethanol production from Jerusalem artichoke juice with some Kluyveromyces species (1981)
    Springer
    Biotechnology letters 3 (1981), S. 589-594 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The kinetics of ethanol production by Kluyveromyces marxianus ATCC 12708 and ATCC 10606, K. cicerisporus ATCC 22295 and K. fragilis 105 have been studied using raw juice of the Jerusalem artichoke in which the carbohydrates were not hydrolysed prior to fermentation. The experiments revealed that this juice contains enough nutrients and can serve as a complete medium without additional nutrients both for growth of the yeasts and for ethanol production. It was found that both specific ethanol productivity and specific glucose uptake rates were the highest with K. marxianus ATCC 12708 (1.68 gg-1h-1 and 3.78 gg-1h-1 respectively). This microorganism produced an ethanol yield of 87.5% of the theoretical value in 25 hours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00133439
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Release of surfactant from Corynebacterium lepus with alkenes (1981)
    Springer
    Biotechnology letters 3 (1981), S. 583-588 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Corynebacterium lepus grown in a mineral salts medium containing glucose as the sole carbon source produced a significant amount of cell-bound surfactant. Some alkenes or a mixture of alkenes added to a water suspension of the cells released a considerable amount of surfactant from the cells. Both surface and interfacial tensions of the suspension were reduced to 30–32 mN/m and 1–2 mN/m respectively as a consequence of this release. According to the dynamics of surfactant release, it is assumed that some alkenes easily “flow” into the cells, predominantly through direct contact with these hydrocarbons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00133438
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Bacteria-induced de-emulsification of oil-in-water petroleum emulsions (1984)
    Springer
    Biotechnology letters 6 (1984), S. 419-424 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Nocardia amarae has been shown to be a potent biological de-emulsifier of model oil-in-water emulsions and petroleum water-in-oil field emulsions. N. amarae is reported here to de-emulsify petroleum oil-in-water field emulsions. Parameters affecting the growth and the de-emulsifying ability of this bacterium have been examined. Bacteria-induced de-emulsifying activity could be useful in clarifying tailings ponds and sludges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00129302
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of pH on hydrogen production with Citrobacter intermedius (1980)
    Springer
    Biotechnology letters 2 (1980), S. 93-98 
    Details
    ISSN: 1573-6776
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Citrobacter intermedius was grown in a 14-liter fermenter under batch anaerobic conditions at the following controlled pH values: 5, 5.75, 6.0, 6.5, 7.0, 7.5, and 8.0. The growth medium was a glucose mineral salts medium with 0.1% ammonium sulfate as the source of sulfur. The optimum pH for H2 production was 5.75 and 6.0 which gave a yield of 1.1 moles H2/mole glucose. The optimum H2-productivity was 144 moles H2 per hour at pH 6.0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00142032
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  • 6
    Electronic Resource
    Electronic Resource
    Production of alcohol from Jerusalem artichokes by yeasts (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 2297-2308 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Various yeasts such as several strains of Saccharomyces diastaticus, S. cerevisiae, and Kluyveromyces fregilis were investigated for their ability to ferment the carbohydrates from Jerusalem artichokes to alcohol. Juice extracted of the carbohydrates. Fermentation was also carried out with raw artichokes without prior juice extraction. Result indicate that this row material has good potential for fuel alcohol production by fermentation.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260241102
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  • 7
    Electronic Resource
    Electronic Resource
    Production of surfactant by Arthrobacter paraffineus ATCC 19558 (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 165-175 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A. paraffineus ATCC 19558 grown in MMSM (modified mineral salts medium) containing hydrocarbon produced surfactant, with a maximum CMC-1 value obtained by using hexadecane as the carbon source. No activity of surface active agent in whole broth was observed when glucose was used in the MMSM instead of hexadecane. The biomass concentration obtained with glucose was about 40% of that obtained with hexadecane. Glucose (4%) in the medium contaning hexadecane caused a 27 and 21% decrease of biomass and surfactant concentrations, respectively. In the process of surfactant production, glucose can be used as a carbon source for growth, and hexadecane added later can serve for production of the surface active agent. The optimum temperature for production of surfactant is 27°C.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240114
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  • 8
    Electronic Resource
    Electronic Resource
    Fuel alcohol biosynthesis by Zymomonas anaerobia: Optimization studies (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 691-701 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The optimum operating conditions for growth and ethanol production of Zymomonas anaerobia ATCC 29501 were established. The optimum pH range and temperature were found to be 5.0-6.0 and 35°C, respectively. Based on the results obtained from the temperature optimization study, an Arrhenius-type temperature relationship for the specific growth rate was developed. The growth and ethanol production of this microbe also have been optimized in terms of concentrations of glucose, essential nutrients, and minerals. With optimum medium and operating conditions, an ethanol concentration of 96 g/L was obtained in 23 h. Both growth and ethanol yield coefficients in dependence on initial glucose concentrations were determined.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260240312
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Ethanol production from fodder beets (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 25 (1983), S. 1737-1745 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Various yeasts such as two strains of Saccharomyces cerevisiae, Saccharomyces diastaticus, and Kluyveromyces marxianus were investigated for their ability to ferment fodder beet juice to alcohol. Juice extracted from fodder beet roots without any additives was used as a fermentation substrate. The fermentation kinetic parameters were determined and compared for each species of yeast tested. The best species for fodder beet juice fermentation was chosen and products obtained by fermentation of one hectare of fodder beet plants are given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260250705
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  • 10
    Electronic Resource
    Electronic Resource
    Fuel alcohol production by Zymomanas anaerobia: Kinetics (1984)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 4 (1984), S. 153-162 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Process kinetics of a strain of Zymomonas anaerobia,which recently was shown to posses a high potential for ethanol production,are described applying the formal macroapproachThe effect of ethanol inhibition on microbial growth,substrate utilization and alcohol production was investigated in detail. Growth rate and yield coefficients were affected by the ethanol concentrationSeveral mathematical model functions from literature were tested for the quantification of experimental batch data. As none of these models was able to describe the entire growth phase a modified model using formal kinetics was developed for the rates of growth,substrate utilization and product formation (see Eqs. 10, 14, 18).
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370040212
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