https://scholars.lib.ntu.edu.tw/handle/123456789/146162
標題: | Biosurfactant Production by Serratia Marcescens Ss-1 and Its Isogenic Strain Sm Delta R Defective in Spnr, a Quorum-Sensing Luxr Family Protein | 作者: | WEI, YU-HONG LAI, HSIN-CHIH CHEN, SHAN-YU YEH, MAO-SONG CHANG, JO-SHU |
關鍵字: | biosurfactant;emulsification;quorum sensing;Serratia marcescens;surface tension | 公開日期: | 2004 | 卷: | v.26 | 期: | n.10 | 起(迄)頁: | 799-802 | 來源出版物: | BIOTECHNOLOGY LETTERS | 摘要: | Serratia marcescens SS-1 and its SpnR-defective isogenic mutant, SMDeltaR , produced an extracellular surfactant able to decrease surface tension of water from 72 to 37 dyne cm(- 1) (SMDeltaR strain) and to 45 dyne cm(-1) (SS-1 strain). The biosurfactant also emulsified kerosene and diesel with a maximum emulsion index of 77% ( diesel and kerosene) for the SMDeltaR strain, and 72% ( kerosene) and 40% ( diesel) for the SS-1 strain. Deletion of spnR gene appeared to enhance biosurfactant production. Model simulations suggest that biosurfactant production by the two strains was growth- associated. The SMDeltaR strain had a yield coefficient of 22 - 32 % g dry cell(-1), which is 32 - 50% higher than that of the SS-1 strain. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/105299 |
顯示於: | 醫學檢驗暨生物技術學系 |
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