| Literature DB >> 19428355 |
A M Marqués1, A Pinazo, M Farfan, F J Aranda, J A Teruel, A Ortiz, A Manresa, M J Espuny.
Abstract
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 0.037g L(-1) and the interfacial tension against hexadecane was 5mN m(-1). At pH 7.4 the glycolipid CMC/critical aggregation concentration (CAC) was 0.05g L(-1) and at pH 4 it was 0.034g 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.Entities:
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Year: 2009 PMID： 19428355 DOI： 10.1016/j.chemphyslip.2009.01.001
Source DB: PubMed Journal: Chem Phys Lipids ISSN： 0009-3084 Impact factor: 3.329