Degradation of selected (bio-)surfactants by bacterial cultures monitored by calorimetric methods |
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Authors: | Nicole Frank Andreas Lißner Mario Winkelmann Regina Hüttl Florian O Mertens Stefan R Kaschabek Michael Schlömann |
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Institution: | (1) Institute of Physical Chemistry, TU Bergakademie Freiberg, Leipziger Str. 29, 09596 Freiberg, Germany;(2) Institute of Biosciences, TU Bergakademie Freiberg, Leipziger Str. 29, 09596 Freiberg, Germany; |
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Abstract: | The subjects of the article are investigations concerning the ability of both Rhodococcus opacus 1CP and mixed bacterial cultures to use selected surfactants as sole carbon and energy source. In a comparative manner the
biosurfactants rhamnolipid, sophorolipid and trehalose tetraester, and the synthetic surfactant Tween 80 were examined. Particular
emphasis was put on a combinatorial approach to determine quantitatively the degree of surfactant degradation by applying
calorimetry, thermodynamic calculations and mass spectrometry, HPLC as well as determination of biomass. The pure bacterial
strain R. opacus was only able to metabolize a part of the synthetic surfactant Tween 80, whereas the mixed bacterial cultures degraded all
of the applied surfactants. Exclusive for the biosurfactant rhamnolipid a complete microbial degradation could be demonstrated.
In the case of the other surfactants only primary degradation was observed. |
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