alexa The effect of medium composition on the structure and physical state of sophorolipids produced by Candida bombicola ATCC 22214.
Environmental Sciences

Environmental Sciences

Journal of Petroleum & Environmental Biotechnology

Author(s): Cavalero DA, Cooper DG

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Abstract Candida bombicola was grown using a variety of lipophilic carbon substrates. Most of the hydrocarbon and carboxylic acid substrates resulted in a mixture of sophorolipids consisting of free acids and the more desirable lactones. The ratio of diacylated lactone to free acid in these mixtures was a maximum when produced using hexadecane and heptadecane. All of the other lipophilic substrates resulted in significant amounts of free acids being produced. These lactone products were unique in that they precipitated as crystals, which were easily separated from the culture medium. All of the other products were isolated as oils as is usually reported in the literature. Finally, the amounts of these crystals recovered were significantly higher than those observed for any of the oily products. It was possible to determine the degree of direct incorporation of the lipophilic substrates into the sophorolipids for a homologous series of alkanes. The amount of direct incorporation increased with increasing chain length to a maximum for pentadecane, hexadecane and heptadecane. As the length of the alkane substrate increased further, the amount of direct incorporation then decreased until there was no apparent incorporation for eicosane.
This article was published in J Biotechnol and referenced in Journal of Petroleum & Environmental Biotechnology

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