Browsing by Author "Rahman R.N.Z.Abd."
Now showing 1 - 1 of 1
Results Per Page
Sort Options
- Some of the metrics are blocked by yourconsent settings
Publication Production of highly enantioselective (-)-menthyl butyrate using Candida rugosa lipase immobilized on epoxy-activated supports(2008) ;Othman S.S. ;Basri M. ;Hussein M.Z. ;Abdul Rahman M.B. ;Rahman R.N.Z.Abd. ;Salleh A.B. ;Jasmani H. ;Faculty of Science and Technology ;Universiti Sains Islam Malaysia (USIM) ;Universiti Putra Malaysia (UPM)Universiti Teknologi MARA (UiTM)Optically active (-)-menthyl butyrate was synthesized by enantioselective esterification of racemic (±)-menthol and butyric anhydride using lipase from Candida rugosa immobilized onto epoxy-activated supports of Eupergit C and Eupergit C 250 L through physical adsorption method. The effects of various temperature, storage condition, stability in organic solvent and lipase recyclability were investigated for their influence on the enzymatic enantioselective formation of (-)-menthyl butyrate. The immobilized lipases retained high catalytic activity of up to 31% yield and 100% enantiomeric excess of the desired product, and showed better stability compared to the native lipase. They also exhibited about 50% retained activity even after incubation at higher temperatures, storage at room temperature and after long incubation in hexane. Immobilized lipases also showed considerably efficient reusability.