title: Influence of iron solubility and charged surface-active compounds on lipid oxidation in fatty acid ethyl esters containing association colloids.
abstract: The impact of iron compounds with different solubilities on lipid oxidation was studied in the presence and absence of association colloids. Iron (III) sulfate only accelerated lipid oxidation in the presence of association colloids while iron (III) oleate accelerated oxidation in the presence and absence of association colloids. Further, iron (III) oxide retarded lipid oxidation both with and without association colloids. The impact of charged association colloids on lipid oxidation in ethyl oleate was also investigated. Association colloids consisting of the anionic surface-active compound dodecyl sulphosuccinate sodium salt (AOT), cationic surface-active compound hexadecyltrimethylammonium bromide (CTAB), and nonionic surface-active compound 4-(1,1,3,3-tetramethylbutyl)phenyl-polyethylene glycol (Triton X-100) retarded, promoted, and had no effect on lipid oxidation rates, respectively. These results indicate that the polarity of metal compounds and the charge of association colloids play a big role in lipid oxidation.
authors.affiliation: Department of Food Science, University of Massachusetts - Amherst, 230 Chenoweth Laboratory, Amherst, MA 01003, United States; Health Care Food, Kao Corporation, 2-1-3 Bunka, Sumida-ku, Tokyo 1318501, Japan. Electronic address: homma.rika@kao.co.jp.
authors.forename: Rika
authors.initials: R
authors.lastname: Homma
authors.affiliation: Department of Food Science, University of Massachusetts - Amherst, 230 Chenoweth Laboratory, Amherst, MA 01003, United States.
authors.forename: David R
authors.initials: DR
authors.lastname: Johnson
authors.affiliation: Department of Food Science, University of Massachusetts - Amherst, 230 Chenoweth Laboratory, Amherst, MA 01003, United States; Bioactive Natural Products Research Group, Department of Biochemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.
authors.forename: D Julian
authors.initials: DJ
authors.lastname: McClements
authors.affiliation: Department of Food Science, University of Massachusetts - Amherst, 230 Chenoweth Laboratory, Amherst, MA 01003, United States; Bioactive Natural Products Research Group, Department of Biochemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia. Electronic address: edecker@foodsci.umass.edu.
authors.forename: Eric A
authors.initials: EA
authors.lastname: Decker
mesh_terms: D002412:Cations; D003102:Colloids / Q000737:chemistry*; D004952:Esters / Q000737:chemistry*; D005227:Fatty Acids / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008055:Lipids / Q000737:chemistry*; D010084:Oxidation-Reduction; D012995:Solubility
chemical_list: D002412:Cations; D003102:Colloids; D004952:Esters; D005227:Fatty Acids; D008055:Lipids; D007501:Iron
keywords: Association colloids; Charged surface-active compounds; Lipid oxidation; Prooxidant metals