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

被引:38
作者
Kim, HS
Jeon, JW
Kim, SB
Oh, HM
Kwon, TJ
Yoon, BD [1 ]
机构
[1] Korea Res Inst Biosci & Biotechnol, Lab Environm Biotechnol, Taejon 305333, South Korea
[2] Konkuk Univ, Dept Microbial Engn, Seoul 143701, South Korea
关键词
biosurfactant; Candida antarctica; mannosylerythritol lipid; physico-chemical properties; surface activity;
D O I
10.1023/A:1020309816545
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
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 muM, 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.
引用
收藏
页码:1637 / 1641
页数:5
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