Abstract
A hitherto unreported esterified form of steryl glucoside has been isolated from potato tuber lipids and soybean phosphatides. It is composed of sterol, glucose, and fatty acid in the molar ratio 1:1:1. Four components of the sterol moiety have been detected ; they include Β-sitosterol and stigmasterol (identified by gas–liquid chromatography). Fatty acids are palmitic, stearic, oleic, linoleic, and linolenic acids. As demonstrated by infrared analysis and periodate oxidation, the fatty acid is located on C6 of the sugar portion.
Highlights
1N A PREVIOUS paper [1] the presence of free and esterified forms of steryl glucosides in potato lipid extracts was reported
Thin-layer chromatography showed a single component of R F 0.07 in HEA and R F 0.91 in diisobutyl ketone-acetic acid-water :50 :10 (DKAW). Aliquots of this product were treated with 0.1 N methanolic potassium hydroxide for 15 min at 37' and fatty acid methyl esters ( K F 0.67 in HEA) and a derivative of same RF as steryl glucoside were shown by thin-layer chromatography (TLC)
esterified steryl glucoside (ESG) is very heterogeneous within the class
Summary
1N A PREVIOUS paper [1] the presence of free and esterified forms of steryl glucosides in potato lipid extracts was reported. A commercial source of soybean phospholipids, containing appreciable quantities of esterified steryl glucoside (ESG), was used as starting material. Revealed by TLC, were: fatty acid methyl esters (RF 0.63 in hexane-diethyl ether-acetic acid 90: 10:1 (HEA)), and the deacylated product, which had the same RF value as steryl glucoside (0.46 in DKAW).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
