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  • Title: Production and characterization of a biosurfactant from Cyberlindnera samutprakarnensis JP52(T.).
    Author: Poomtien J, Thaniyavarn J, Pinphanichakarn P, Jindamorakot S, Morikawa M.
    Journal: Biosci Biotechnol Biochem; 2013; 77(12):2362-70. PubMed ID: 24317046.
    Abstract:
    Cyberlindnera samutprakarnensis JP52(T), isolated from cosmetic industrial wastes in Thailand, was found to be an efficient biosurfactant-producing yeast when cultured in a medium containing (2% (w/v) glucose and 2% (v/v) palm oil at 30 °C, 200 rpm for 7 d. The crude biosurfactant had the ability to reduce the surface tension from 55.7 to 30.9 mN/m at 25 °C with a critical micelle concentration (CMC) of 0.046%. Physicochemical analysis of the crude biosurfactant revealed that it had wide ranges of optimum pH and pH stability at 6-9 and 3-10 respectively. It was also thermostable and retained 80% activity even after heat treatment, and it tolerated NaCl at 1.0-10%. Furthermore, it effectively emulsified various vegetable oils with an E24 value of over 80%. A partially purified biosurfactant fraction was analyzed for its structure by MALDI-TOF MS and NMR. This revealed that the biosurfactant mainly contained sophorolipids in C18-(MW 574) and C16-diaceltylated (MW 662) forms.
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