The physicochemical properties and chemical composition of trehalose lipids produced by Rhodococcus erythropolis 51T7
| Autor: | J.A. Teruel, Àngels Manresa, Maribel Farfán, M. J. Espuny, Antonio Ortiz, Aurora Pinazo, Ana Marqués, Francisco J. Aranda |
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| Rok vydání: | 2009 |
| Předmět: |
Keratinocytes
Cell Survival Hexadecane Biochemistry Phase Transition Cell Line Mice chemistry.chemical_compound Glycolipid Phase (matter) Animals Humans Rhodococcus Organic chemistry Molecular Biology Chemical composition Isopropyl myristate Micelles Osmolar Concentration Organic Chemistry Trehalose Genes rRNA Cell Biology Fibroblasts Hydrogen-Ion Concentration chemistry Genes Bacterial Critical micelle concentration Emulsions Glycolipids Isopropyl |
| Zdroj: | Chemistry and Physics of Lipids. 158:110-117 |
| ISSN: | 0009-3084 |
| Popis: | This study analyzed the chemical and physical properties of a biosurfactant synthesized by Rhodococcus sp. 51T7. The biosurfactant was a trehalose tetraester (THL) consisting of six components: one major and five minor. The hydrophobic moieties ranged in size from 9 to 11 carbons. The critical micelle concentration (CMC) was 0.037 g L−1 and the interfacial tension against hexadecane was 5 mN m−1. At pH 7.4 the glycolipid CMC/critical aggregation concentration (CAC) was 0.05 g L−1 and at pH 4 it was 0.034 g L−1. A phase diagram revealed effective emulsification with water and paraffin or isopropyl myristate. A composition of 11.3–7.5–81.8 (isopropyl myristate–THL–W) was stable for at least 3 months. The HLB was 11 and the phase behaviour of the glycolipid revealed the formation of lamellar and hexagonal liquid-crystalline textures. |
| Databáze: | OpenAIRE |
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