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

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 surfa...

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Published in:Biotechnology letters 2002-10, Vol.24 (19), p.1637
Main Authors: Kim, Hee-sik, Jeon, Jong-woon, Kim, Seong-bin, Oh, Hee-mock, Kwon, Tae-jong, Yoon, Byung-dae
Format: Article
Language:English
Subjects:
Activated sludge
Chemical properties
Crude oil
Microorganisms
Molecular weight
Petroleum hydrocarbons
Sodium chloride
Surface tension
Surfactants
Vegetable oils
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container_title Biotechnology letters
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Jeon, Jong-woon
Kim, Seong-bin
Oh, Hee-mock
Kwon, Tae-jong
Yoon, Byung-dae
description 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^sup -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^sup -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.[PUBLICATION ABSTRACT]
doi_str_mv 10.1023/A:1020309816545
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subjects Activated sludge
Chemical properties
Crude oil
Microorganisms
Molecular weight
Petroleum hydrocarbons
Sodium chloride
Surface tension
Surfactants
Vegetable oils
title Surface and physico-chemical properties of a glycolipid biosurfactant, mannosylerythritol lipid, from Candidaantarctica
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