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    Characterization of cellulose production by a Gluconacetobacter xylinus strain from Kombucha

    Access Status
    Fulltext not available
    Authors
    Nguyen, V.
    Flanagan, B.
    Gidley, M.
    Dykes, Gary
    Date
    2008
    Type
    Journal Article
    
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    Citation
    Nguyen, V. and Flanagan, B. and Gidley, M. and Dykes, G. 2008. Characterization of cellulose production by a Gluconacetobacter xylinus strain from Kombucha. Current Microbiology. 57 (5): pp. 449-453.
    Source Title
    Current Microbiology
    DOI
    10.1007/s00284-008-9228-3
    ISSN
    0343-8651
    School
    School of Public Health
    URI
    http://hdl.handle.net/20.500.11937/35262
    Collection
    • Curtin Research Publications
    Abstract

    The aims of this work were to characterize and improve cellulose production by a Gluconoacetobacter xylinus strain isolated from Kombucha and determine the purity and some structural features of the cellulose from this strain. Cellulose yield in tea medium with both black tea and green tea and in Hestrin and Schramm (HS) medium under both static and agitated cultures was compared. In the tea medium, the highest cellulose yield was obtained with green tea (~0.20 g/L) rather than black tea (~0.14 g/L). Yield in HS was higher (~0.28 g/L) but did not differ between static and agitated incubation. 1H-NMR and 13C-NMR spectroscopy indicated that the cellulose is pure (free of acetan) and has high crystallinity, respectively. Cellulose yield was improved by changing the type and level of carbon and nitrogen source in the HS medium. A high yield of ~2.64 g/L was obtained with mannitol at 20 g/L and corn steep liquor at 40 g/L in combination. In the tea medium, tea at a level of 3 g/L gave the highest cellulose yield and the addition of 3 g/L of tea to the HS medium increased cellulose yield to 3.34 g/L. In conclusion, the G. xylinus strain from Kombucha had different cellulose-producing characteristics than previous strains isolated from fruit. Cellulose was produced in a pure form and showed high potential applicability. Our studies extensively characterized cellulose production from a G. xylinus strain from Kombucha for the first time, indicating both similarities and differences to strains from different sources. © 2008 Springer Science+Business Media, LLC.

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