alexa Monoacylglycerols: glycolipid biosurfactants produced by a thermotolerant yeast, Candida ishiwadae.
Environmental Sciences

Environmental Sciences

Journal of Petroleum & Environmental Biotechnology

Author(s): Thanomsub B, Watcharachaipong T, Chotelersak K, Arunrattiyakorn P, Nitoda T,

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Abstract AIMS: To isolate and characterize biosurfactants produced by a thermotolerant yeast isolated in Thailand. MATERIALS AND RESULTS: Yeast strains isolated from plant material in Thailand were first screened for the ability to produce lipase and biosurfactant. A strain Y12, identified as Candida ishiwadae by physiological tests, survived at 45 degrees C and produced relatively large amounts of biosurfactants. From the culture filtrate of this strain, two glycolipid biosurfactants, a and b, were purified by solvent fractionation, silica gel and ODS column chromatographies. Compounds a and b were determined to be monoacylglycerols; 1-linoleylglycerol and 1-oleylglycerol, respectively. Both compounds exhibited higher surfactant activities tested by the drop collapse test than several artificial surfactants such as sodium dodecyl sulphate. CONCLUSIONS: Glycolipid biosurfactants produced by a thermotolerant yeast, C. ishiwadae were characterized to be monoacylglycerols which exhibited high surfactant activities. SIGNIFICANCE AND IMPACT OF THE STUDY: A thermotolerant yeast strain, C. ishiwadae, could be a potential candidate for producing monoacylglycerols which are useful in industrial applications.
This article was published in J Appl Microbiol and referenced in Journal of Petroleum & Environmental Biotechnology

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