Surface and physico-chemical properties of a glycolipid biosurfactant, mannosylerythritol lipid, from Candida antarctica
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Candida sp. SY16 produces a glycolipid-type biosurfactant, mannosylerythritol lipid (MEL-SY16) which, at low concentrations, emulsifies hydrocarbons, vegetable oil, and crude oil. The molecular weight of MEL-SY16 was 634 Da and its hydrophilic lipophilic balance (HLB) was 8.8. It decreased the surface tension to 30 dyne cm−1 at a critical micelle concentration (CMC) of 15.8 μM, and the minimum interfacial tension against kerosene (a mixture of petroleum hydrocarbons) was 0.1 dyne cm−1. MEL-SY16 was stable from pH 4 to pH 10, up to 90 °C for 1 h, and against NaCl up to 100 mM. It was readily degraded by microorganisms in activated sludge within a short time, and exhibited very low toxicity to mouse fibroblast cells. These properties confirm that MEL-SY16 is suitable for a variety of environmental applications.
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- Surface and physico-chemical properties of a glycolipid biosurfactant, mannosylerythritol lipid, from Candida antarctica
Volume 24, Issue 19 , pp 1637-1641
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- Candida antarctica
- mannosylerythritol lipid
- physico-chemical properties
- surface activity
- Industry Sectors
- Author Affiliations
- 1. Laboratory of Environmental Biotechnology, Korea Research Institute of Bioscience and Biotechnology, Yusong, Taejon, 305-333, Korea
- 2. Department of Microbial Engineering, Kon-Kuk University, Seoul, 143-701, Korea