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  • 1
    Electronic Resource
    Electronic Resource
    The microflora in a sour dough started spontaneously on typical Swedish rye meal
    Amsterdam : Elsevier
    Food Microbiology 3 (1986), S. 3-12 
    Details
    ISSN: 0740-0020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/S0740-0020(86)80019-3
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  • 2
    Electronic Resource
    Electronic Resource
    Loss of the ability to oxidize hydrocarbons in protoplasts ofCandida lipolytica (1967)
    Springer
    Cellular and molecular life sciences 23 (1967), S. 1005-1006 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Aus den Zellen der HefeCandida lipolytica wurden Protoplasten gewonnen, die die Oxydationsfähigkeit gegenüber Hexadekan verloren haben, während diejenige gegenüber Glukose erhalten geblieben ist. Der Verlust der Fähigkeit, den Kohlenwasserstoff zu oxydieren, wird entweder durch eine Veränderung der Oberfläche der zytoplasmatischen Membran und Destruktion des an sie gebundenen Oxydationsenzyms erklärt oder dadurch, dass die Protoplasten die Fähigkeit verloren haben, Kohlenwasserstoffe in die Zelle zu transportieren.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02136412
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrastructural changes in the yeastCandida lipolytica caused by penetration of hydrocarbons into the cell (1968)
    Springer
    Cellular and molecular life sciences 24 (1968), S. 1066-1068 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Durch Lösung von 0,1% Vanadiumoder Nickel-Naphthenat in Kohlenwasserstoffen kann deren Durchtritt in die Zelle der HefeCandida lipolytica elektronenmikroskopisch verfolgt werden. Die Kohlenwasserstoffe durchdringen die Zellwand, reichern sich an der Zytoplasmamembran an und verursachen im Zellinnern reiche Veränderungen. Diese beweisen meistenteils die Schlüsselaufgabe der Zytoplasmamembran, den direkten Kontakt der Kohlenwasserstoffe mit den Oxydationsenzymen zu vermitteln.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02138754
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Regulation of a mixed culture of Streptococcus lactis and Saccharomycopsis fibuliger (1981)
    Springer
    Applied microbiology and biotechnology 12 (1981), S. 216-219 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary In a mixed culture of Saccharomycopsis fibuliger Y76 and Streptococcus lactis 65.1 on starch the main interactions are commensalism and competition. Oxygen-limited batch and continuous cultures of S. fibuliger showed accumulation of sugars. When oxygen was used as an external regulatory parameter in the mixed culture lactic acid, acetic acid and formic acid were formed. Ethanol produced by S. lactis was most likely assimilated by S. fibuliger. Continuous mixed cultures were stable under conditions of oxygen limitation at the dilution rates tested (0.10 h−1 and 0.15 h−1). Conversion yields of 35 to 40% were obtained but may be improved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00499490
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  • 5
    Electronic Resource
    Electronic Resource
    Growth ofMethylomonas methanolica: Factors Influencing growth yield (1981)
    Springer
    Applied microbiology and biotechnology 12 (1981), S. 107-112 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary In a process for biomass production from methanol usingMethylomonas methanolica WLO the efficiency of carbon conversion into cellular carbon is affected by external factors such as: (i) Dissolved oxygen tension (DOT) and carbon dioxide partial pressure (P CO 2). AtP CO 2〉0.3 atm the cell yield is decreasing. Data suggests that “critical” DOT is dependent on cell concentration. (ii) Methanol gradients. When supplying methanol discontinuously or in a concentrated feed a substantial drop in cell yield is obtained. Formic acid transiently accumulated following a pulse addition of methanol. As a result more methanol is needed for energy production and a lower cell yield is obtained. In addition a non-optimally working energy metabolism most likely leads to NADH limitation of cell synthesis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01970043
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  • 6
    Electronic Resource
    Electronic Resource
    Clutivation of yeast on gas oil (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 11 (1969), S. 383-391 
    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 results achieved by the cultivation of the yeast. Candida lipolytica on gas oil are referred. By using a distillation fraction of gas oil distilling between 180-400°C, containing 10-20% of n-alkanes, the optimal condition for biomass production and deparaffination were estimated for various dilution rates and various amounts of gas oil in the medium. The main factor, which influences the yield coefficient by hydrocarbon fermentation is the polyauxie of the hydrocarbon substrate. The penetration of dispersed hydrocarbons into the yeast cell is demonstrated on electron micrographs and the velocity and reversibility of this process is estimated by using tritium-traced hexadecane.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260110310
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  • 7
    Electronic Resource
    Electronic Resource
    Cultivation of the yeast Candida lipolytica on hydrocarbons. II. One-stage continuous cultivation on gas oil (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 10 (1968), S. 865-875 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Continuous cultivation of the yeast Candida lipolytica on gas oil was studied from the viewpoint of biomass production and oil deparaffination. Optimum conditions wore found at the dilution rate D = 0.16-0.19 when biomass productivity 1.7 g/l/hr and yield coefficient. y = 0.92 were achieved. At deparaffination to the same freezing point, more than double the production of biomass and deparaffined oil during a given time unit was achieved in a continuous process than in batch cultivation. Consumption of substrate was followed in both cultivation processes and it was confirmed that individual n-alkanes of gas oil were degraded at various rates and yields. Results proved optimum cultivation conditions to depend on concentration and composition of the paraffinic fraction of gas oil used. To achieve these conditions the continuous process may be controlled by choice; of suitable dilution rate and concentration of gas oil.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260100611
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  • 8
    Electronic Resource
    Electronic Resource
    Cultivation of the yeast candida lipolytica on hydrocarbons. I. Degradation of n-alkanes in batch fermentation of gas oil (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 10 (1968), S. 33-43 
    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 growth of batch-cultivated yeast Candida lipolytica on three kinds of gas oil using mineral medium was studied. A linear dependence was found between the production of yeast biomass and the consumption of n-alkanes, while the decrease of freezing point of gas oil during cultivation had a distinct course. This disproportion was explained by different degradation of individual n-alkanes contained in gas oil. The rate of degradation of pentadecane, hexadecane, and heptadecane was the same during the entire cultivation. On the contrary, in the first phase the utilization of shorter chain n-alkanes, nonane to tetradecane, was more rapid while that of longer chain homologs, octadecane to pentacosane, lagged. Rapid utilization of longer chain n-alkanes did not occur before the concentration of the other n-alkanes decreased. Only then the rapid decrease of freezing point appeared.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260100103
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