title: Emulsification properties of biosurfactant produced from Pseudomonas aeruginosa RB 28.
abstract: Biosurfactant produced from P. aeruginosa RB 28 was extracted, purified and characterized. Thin layer chromatography results showed that the extract contained two different compounds. The identification of the nature of the two compounds showed that they were glycolipids and rhamnose was the sugar moiety in these glycolipids. It was concluded that these compounds were rhamnolipids. The production of biosurfactant was started at late log phase and reached its maximal level (2.7 g L(-1)) at the stationary phase. Study of some rhamnolipid properties showed that sunflower oil, heptadecane and paraffin were efficiently emulsified and emulsions formed with vegetable oils (olive oil, corn oil and sunflower oil) were more stable than emulsions formed with hydrocarbons.
authors.affiliation: Department of Biotechnology, College of Science, University of Baghdad, Iraq.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Sifour
authors.forename: Majid H
authors.initials: MH
authors.lastname: Al-Jilawi
authors.forename: Ghazi M
authors.initials: GM
authors.lastname: Aziz
mesh_terms: D018533:Biomass; D004655:Emulsions / Q000737:chemistry*; D006838:Hydrocarbons / Q000378:metabolism; D000069463:Olive Oil; D010938:Plant Oils / Q000378:metabolism; D011550:Pseudomonas aeruginosa / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification / Q000502:physiology*; D012210:Rhamnose / Q000378:metabolism; D012988:Soil Microbiology; D013500:Surface Tension; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D004655:Emulsions; D006838:Hydrocarbons; D000069463:Olive Oil; D010938:Plant Oils; D013501:Surface-Active Agents; D012210:Rhamnose