Premium
Characterization of Lipase‐Catalyzed Structured Lipids from Selected Vegetable Oils with Conjugated Linoleic Acid: Their Oxidative Stability with Rosemary Extracts
Author(s) -
Lee J.H.,
Kim M.R.,
Kim H.R.,
Kim I.H.,
Lee K.T.
Publication year - 2003
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.2003.tb12308.x
Subject(s) - sunflower oil , soybean oil , chemistry , conjugated linoleic acid , lipase , food science , transesterification , thiobarbituric acid , linoleic acid , peroxide , lipid oxidation , polyunsaturated fatty acid , organic chemistry , sunflower , peroxide value , autoxidation , catalysis , fatty acid , antioxidant , enzyme , lipid peroxidation , biology , agronomy
Response surface methodology was used to optimize the lipase‐catalyzed transesterification reaction between conjugated linoleic acid (CLA) and soybean oil. On the basis of the model, structured lipids (SLs) were synthesized from CLA and soybean oil or sunflower oil. CLA was incorporated in SL‐soybean (24.4 mol%) and SL‐sunflower (23.1 mol%), respectively. Isomerization to trans, trans CLA was observed during the reaction. Throughout the oxidation study, all SLs showed higher peroxide values (POVs), p‐anisidine values, and 2‐thiobarbituric acid‐reactive substance values than their counterparts. Rosemary extracts with a different amount (100 to 300 ppm) could effectively reduce oxidation in soybean oil, sunflower oil, and their SLs.