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http://dx.doi.org/10.5352/JLS.2012.22.2.239

Characteristics of Biosurfactant Produced by Pseudomonas sp. G314  

Shim, So-Hee (Department of Microbiology, College of Medicine, Korea University)
Park, Kyeong-Ryang (Department of Biotechnology, Hannam University)
Publication Information
Journal of Life Science / v.22, no.2, 2012 , pp. 239-244 More about this Journal
Abstract
The purpose of this paper is to analyze the characteristics and chemical components of biosurfactant produced by Pseudomonas sp. G314. Pseudomonas sp. G314 was isolated from soil samples which were contaminated with oil in Daejon area. As such, it produced quality biosurfactant [23]. One type of biosurfactant was kept in a refrigerator, whereas another type of biosurfactant was kept in room temperature. The surface tension activities were then compared. As a result, the biosurfactant from Pseudomonas sp. G314 that was kept at room temperature was stable for 10 days, showing 26.2 dyne/cm of surface tension activity. This result was found to be similar to that of the refrigerator storage. The surface tension of batch culture was 25 dyne/cm, but the culture in the 5 l fermentor was 27 dyne/cm. Therefore, it can be suggested that the large-scale culture is feasible via the fermentor. Biosurfactant from Pseudomonas sp. G314 was estimated to be a kind of glycolipid because it dissolved in acetone and methanol much better than in benzene and toluene [23]. A spot was detected through the elution of silica gel column and the spread of TLC, and the Rf value was 0.58. This spot has a positive reaction with Bail's reagent and rhodamine 6G. Hence, we can conclude that biosurfactant from Pseudomons sp. G314 was a glycolipid containing carbohydrate and lipid.
Keywords
Biosurfactant; glycolipid; Pseudomonas sp. G314; surface tension;
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