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  • 1
    Electronic Resource
    Electronic Resource
    Production of water-soluble surface-active exolipids by Torulopsis apicola (1987)
    Springer
    Applied microbiology and biotechnology 26 (1987), S. 199-205 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Several Torulopsis yeasts were screened for production of extracellular surface-active compounds. One strain, Torulopsis apicola IMET 43747, was studied in greater detail. Both on nalkanes and on carbohydrates it produced a mixture of water-soluble biosurfactants with remarkable interfacial activities and surface-tension values around 30 mN m-1 and interfacial tension below 1 mN m-1. Most of the biosurfactants are produced in the late exponential and in the early stationary growth phase. Production was increased by using hydrophobic compounds as the carbon source. The yields on n-alkanes were influenced by the concentrations of both the carbon source and the yeast extract. The effects of one purified biosurfactant on microbial growth on nalkanes and its antibacterial and antiphagal activities reveal new physiological aspects of biosurfactant generation by T. apicola.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00286308
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Regulation der Alkanverwertung bei Acinetobacter calcoaceticus (1983)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 3 (1983), S. 371-374 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370030412
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Regulation der extracellulären Lipase aus einem alkanverwertenden Stamm von Acinetobacter (1983)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 3 (1983), S. 185-186 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370030212
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Antiphytovirale Aktivität von Rhamnolipid aus Pseudomonas aeruginosa (1987)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 7 (1987), S. 353-356 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: A rhamnolipid released by Pseudomonas aeruginosa 196 Aa into the culture medium reduced the number of local lesions induced by tobacco mosaic virus on leaves of the hypersensitive host Nicotiana glutinosa L. by up to 90%. The content of potato virus X in the systemically infected host Nicotiana tabacum L. ‘Samsun’ is decreased in inoculated as well as in secondarily infected leaves by up to 50%. In a smaller degree red clover mottle virus is influenced in the systemic host Pisum sativumconvar.speciosum (Dierb.) Alef ‘Nadja’.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370070415
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  • 5
    Electronic Resource
    Electronic Resource
    Extrazelluläre Lipase aus Acinetobacter calcoaceticus (1982)
    Berlin : Wiley-Blackwell
    Acta Biotechnologica 2 (1982), S. 337-342 
    Details
    ISSN: 0138-4988
    Keywords: Life Sciences ; Life Sciences (general)
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Cell-free growth liquor of Acinetobacter calcoaceticus 69-V contains an extracellular lipase. Its activity depends on growth phase and carbon source. During growth on acetate or succinate the activity ist low or zero, respectively. Growth on alkanes causes an increase in the extracellular lipase activity. Activity reaches maximum values during the exponential phase of growth which significantly decrease in the stationary phaseDuring the growth on alkanes some surfactants (Tauroglycocholate, Triton X-405) stimulate the excretion of the enzyme and some other (Tween, Brij, Triton X-100) inhibit the lipase and growth of cells, respectivelyAir-water and alkane-water interfaces inhibit the lipase activity. During starvation of the bacteria grown on alkanes lipase is excreted in the starvation medium.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/abio.370020406
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