Surface and physico-chemical properties of a glycolipid biosurfactant, mannosylerythritol lipid, from Candida antarctica

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Title
Surface and physico-chemical properties of a glycolipid biosurfactant, mannosylerythritol lipid, from Candida antarctica
Author(s)
Hee Sik Kim; Jong Woon Jeon; Seong Bin Kim; Hee Mock Oh; T J Kwon; Byung Dae Yoon
Bibliographic Citation
Biotechnology Letters, vol. 24, no. 19, pp. 1637-1641
Publication Year
2002
Abstract
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.
Keyword
biosurfactantcandida antarcticamannosylerythritol lipidphysico-chemical propertiessurface activity
ISSN
0141-5492
Publisher
Springer
DOI
http://dx.doi.org/10.1023/A:1020309816545
Type
Article
Appears in Collections:
Synthetic Biology and Bioengineering Research Institute > Cell Factory Research Center > 1. Journal Articles
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