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  • 1
    Electronic Resource
    Electronic Resource
    Lipase-catalyzed reactions in organic media: competition and applications
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Protein Structure and Molecular 911 (1987), S. 117-120 
    Details
    ISSN: 0167-4838
    Keywords: Enzyme kinetics ; Lipase ; Organic solvent ; Reaction selectivity ; Transesterification
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4838(87)90278-0
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  • 2
    Electronic Resource
    Electronic Resource
    Immobilized yeast cells with methanol oxidase activity: Preparation and enzymatic properties (1980)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 22 (1980), S. 1155-1173 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Cells form the yeast Hansenula polymorpha (ATCC 26012) were successfully immobilized by entrapment in a polyacrylamide gel. The resulting gel showed high methanol oxidase activity especially after treatment with a detergent (CTAB). The enzymatic properties of the gel-entrapped cell were not very different from that of the soluble enzyme except that no inhibition was observed at high methanol concentration. In continuous reactors, the gel-entrapped cells showed a much higher stability than other enzyme preparations. The inactivation mechanism was investigated and proved to be the oxidation of essential SH group(s) of the methanol oxidase molecule by hydrogen peroxide. Treatment with β-mercaptoethanol prevented inactivation or regenerated activity.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260220605
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  • 3
    Electronic Resource
    Electronic Resource
    Stereospecific hydrolysis by soluble and immobilized lipases (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 2175-2188 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Stereospecific hydrolysis of insoluble monoesters by lipases are reported. Among the lipases tested, porcine pancreatic lipase was the most stereospecific when acting on 3-chloro-2-methyl propanol propionate. When the chain length of the acid was enhanced, the stereospecificity decreased. Initial rate measurements analysis concluded that the observed stereospecificity was the result of different catalytic constants rather than different Michaelis constants. From these results, methods were derived for the preparation of l- or d-3-chloro-2-methylpropanol (an intermediary in the synthesis of levomepromasine) based on the hydrolysis of esters by soluble or immobilized lipases.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260241006
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  • 4
    Electronic Resource
    Electronic Resource
    Continuous production of ethanol from fructose by immobilized growing cells of Zymomonas mobilis (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 27 (1985), S. 613-620 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Immobilized growing cells of Zymomonas mobilis were found to ferment rapidly and efficiently media containing 100 g/L fructose in a continuous reactor. A volumetric ethanol productivity of 94.8 g/L h was achieved at a substrate conversion of 75.5%. With 97% conversion of substrate the productivity was 28.4 g/L h. At fructose concentrations of 150 and 200 g/L substrate and product inhibitions limited the performance of the reactor. Ethanol production was constant over a period of 55 days.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260270510
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  • 5
    Electronic Resource
    Electronic Resource
    Kinetics of batch fermentations for ethanol production with Zymomonas mobilis growing on Jerusalem Artichoke juice (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 28 (1986), S. 850-856 
    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 flocculent strain of Zymomonas mobilis was used for ethanol production from Jerusalem Artichoke juice containing 113-245 g/L sugar in batch fermentation. The kinetic and yields parameters are calculated using a new method based on polynomial equations for the variation of biomass, ethanol, and sugar concentrations with time. The results show that. Z. mobilis can convert rapidly and efficiently Jerusalem Artichoke juice to ethanol. When a sugar concentration of 248 gL was used, 100 g/L ethanol was formed with an ethanol yield based on sugar utilized of 0.47 g/g (92% of theoretical LP).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260280612
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  • 6
    Electronic Resource
    Electronic Resource
    Preparation and properties of immobilized methanol oxidase (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 333-348 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Methanol oxidase produced by the yeast Hansenula polymorpha DL-1 was used for the enzymatic oxidation of methanol to formaldehyde. The kinetics of enzyme and protein release during cell desruption were studied at the laboratory scale with a Braun homogenizer and the pilot plant scale with a Manton-Gaulin homogenizer. Conditions were defined for maximum release and retention of high activity in cell-free extracts. Methanol oxidase was immobilized by adsorption on DEAE-cellulose from enzymes in cell-free extracts or from ammonium sulfate purified purified fractions. The kinetics of formaldehyde formation with both soluble and immobilized enzyme was studied in batch and continuous reactors.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260200303
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  • 7
    Electronic Resource
    Electronic Resource
    Continuous production of ethanol with Zymomonas mobilis growing on Jerusalem artichoke juice (1987)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 29 (1987), S. 778-782 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260290620
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  • 8
    Electronic Resource
    Electronic Resource
    Batch fermentation kinetics of sugar beet molasses by Zymomonas mobilis (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 38 (1991), S. 304-313 
    Details
    ISSN: 0006-3592
    Keywords: Zymomonas mobilis ; molasses ; fermentation ; ethanol ; osmolality ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A new osmotolerant mutant strain of Zymomonas mobilis was successfully used for ethanol production from beet molasses. Addition of magnesium sulfate to hydrolyzed molasses allowed repeated growth without the need of yeast extract addition. The kinetics and yields parameters of fermentation on media with different molasses concentrations were calculated. The anabolic parameters (specific growth rate, μ, and biomass yield, YX/S) were inhibited at elevated molasses concentrations while the catabolic parameters (specific ethanol productivity, qp, and ethanol yield, Yp/s) were not significantly affected. In addition to ethanol and substrate inhibition, osmotic pressure effects can explain the observed results.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260380312
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