title: Formation of W/O microemulsion based on natural glycolipid biosurfactant, mannosylerythritol lipid-a.
abstract: Mannosylerythritol lipid-A (MEL-A) is a glycolipid biosurfactant abundantly produced from soybean oil by microorganisms at a yield of up to 100 g/L. In this study, the formation of water-in-oil (W/O) microemulsion based on the single component of MEL-A was confirmed using dynamic light scattering (DLS) and freeze fracture electron microscopy (FF-EM). DLS and FF-EM measurements revealed that the diameter of the microemulsion increases with an increase in water-to-surfactant mole ratio (W(0)) ranging from 20 to 60 nm, and the maximum W(0) value was found to be 20, which is as high as that of soybean lecithin. Glycolipid biosurfactant has a great potential for the formation of W/O microemulsion without using any cosurfactants.
authors: Faculty of Science and Technology, Tokyo University of Science, Noda, Chiba, Japan.
authors: Wannasiri
authors: W
authors: Worakitkanchanakul
authors: Tomohiro
authors: T
authors: Imura
authors: Tomotake
authors: T
authors: Morita
authors: Tokuma
authors: T
authors: Fukuoka
authors: Hideki
authors: H
authors: Sakai
authors: Masahiko
authors: M
authors: Abe
authors: Ratana
authors: R
authors: Rujiravanit
authors: Sumaeth
authors: S
authors: Chavadej
authors: Dai
authors: D
authors: Kitamoto
mesh_terms: D020285:Cryoelectron Microscopy; D004655:Emulsions; D006017:Glycolipids / Q000737:chemistry*; D008050:Lipid A / Q000737:chemistry*; D013024:Soybean Oil / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D004655:Emulsions; D006017:Glycolipids; D008050:Lipid A; D013501:Surface-Active Agents; C439671:mannosylerythritol lipid; D014867:Water; D013024:Soybean Oil