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  • 1
    Electronic Resource
    Electronic Resource
    Polymeric viologens as electron donors in hydrogen production by intact cells of Clostridium pasteurianum, Desulfovibrio desulfuricans, and Rhodospirillum rubrumN.R.C.C. No. 18 008. (1980)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 181 (1980), S. 651-656 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The behaviour of 5 polymeric viologens 2a - e as electron donors in the production of hydrogen by intact cells of Cl. pasteurianum, D. desulfuricans, and R. rubrum was studied. The hydrogen production was followed by gas chromatography and the results indicate that Cl. pasteurianum and D. desulfuricans are much more active than R. rubrum. Polymeric viologens 2a - e show lower initial rates than the low molecular weight viologens 1a and 1b. However, this is independent of the final amount of hydrogen produced, since the polymers are as efficient or more efficient than 1a and 1b. The results are briefly discussed in terms of redox potentials, substituent effects and conformational factors.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1980.021810310
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  • 2
    Electronic Resource
    Electronic Resource
    Production of ethyl acetate from dilute ethanol solutions by Candida utilis (1984)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 26 (1984), S. 1038-1041 
    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 conversion of ethanol to ethyl acetate has an advantage as a method of ethanol recovery since ethyl acetate is amenable to simple solvent extraction. The potential of Candida utilis in this conversion was studied. The kinetics of accumulation of ethanol and ethyl acetate in glucose-grown C. utilis showed that ester formation resulted from ethanol utilization under appropriate aeration and was inhibited by Fe3+ supplementation. Candida utilis converted ethanol to ethyl acetate optimally at pH 5.0-7.0. The five-hour rate of ester production increased as the ethanol concentration increased to 10 g/L, and rapidly declined to zero at concentrations exceeding 35 g/L. Thus, C. utilis has potential to recover dilute ethanol in the form of ethyl acetate.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260260905
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  • 3
    Electronic Resource
    Electronic Resource
    Bacterial fermentation of cellulose: Effect of physical and chemical parameters (1983)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 25 (1983), S. 2567-2575 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Acetivibrio celluloyticus converts cellulose directly to ethanol, acetate, H2, and CO2. The effects of various physical and chemical parameters, and their interdependence, including pH, temperature, redox, and ethanol toxicity on this fermentation, were studied. Controlling pH at 6.8 favored a predominance of ethanol over acetate. Supplementation of the medium with additional reductant, concomitant with a lower redox potential, incresed ethanol formation. Results from ethanol-challenged cultures indicated that cell lysis occurs with growing but not with nongrowing cells. A stable strain was adapted for growth in ethanol concentrations almost sevenfold greater than the parent organism.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260251107
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