title: Enzymatic and chemical interesterification of rice bran oil, sheaolein, and palm stearin and comparative study of their physicochemical properties.
abstract: Total of 3 different mixtures of rice bran oil (RBO), sheaolein (SO), and palm stearin (PS) (RBO : SO : PS, 40 : 35 : 25; 15 : 40 : 45; 10 : 35 : 55) were modified by enzymatic interesterification (EIE) using TLIM as a bio-catalyst. After interesterification, a physicochemical properties of selected ratio (10 : 35 : 55; RBO : SO : PS) was compared with chemical interesterification (CIE). CIE sample showed higher SFC than EIE in each measured temperature. DAG content was lower in CIE than EIE sample. Besides, each EIE or CIE products were compared with blends, where higher SFC, longer induction time was observed in the blends. Oxidative stability was measured based on Rancimat and peroxide value (PV) where EIE sample showed longer induction time and lower PV compared to CIE sample. Further, EIE sample was selected for oxidation studies and kept at 60 °C for 22 d after the addition of antioxidants (EGCG, rosemary) where induction time was significantly increased compared to control. EGCG containing sample showed longer induction time and lower PV compared to rosemary containing sample.
authors.affiliation: Authors are with Wilmar Biotechnology Research and Development Center (Shanghai) Co. Ltd., Nr118 Gaodong Rd., Pudong New District, Shanghai, China. prakash@wilmar-intl.com
authors.forename: Prakash
authors.initials: P
authors.lastname: Adhikari
authors.forename: Peng
authors.initials: P
authors.lastname: Hu
mesh_terms: D000975:Antioxidants / Q000032:analysis; D002152:Calorimetry, Differential Scanning; D002384:Catalysis; D002392:Catechin / Q000031:analogs & derivatives / Q000032:analysis; D055598:Chemical Phenomena; D002849:Chromatography, Gas; D003460:Crystallization; D004951:Esterification; D005227:Fatty Acids / Q000032:analysis; D009682:Magnetic Resonance Spectroscopy; D008383:Margarine / Q000032:analysis; D009829:Oleic Acids / Q000032:analysis / Q000737:chemistry*; D010084:Oxidation-Reduction; D000073878:Palm Oil; D010840:Phytosterols / Q000032:analysis; D010938:Plant Oils / Q000032:analysis / Q000737:chemistry*; D000073879:Rice Bran Oil; D014280:Triglycerides / Q000032:analysis / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis
chemical_list: D000975:Antioxidants; D005227:Fatty Acids; D009829:Oleic Acids; D010840:Phytosterols; D010938:Plant Oils; D014280:Triglycerides; D055549:Volatile Organic Compounds; C434349:shea oleine; D000073878:Palm Oil; D008383:Margarine; D002392:Catechin; C045651:epigallocatechin gallate; D000073879:Rice Bran Oil; C022618:tristearin