Impact of lipid physical state on the oxidation of methyl linolenate in oil-in-water emulsions

Journal of Agricultural and Food Chemistry
Saori OkudaE A Decker

Abstract

The purpose of this research was to examine the influence of the physical state of lipids on iron-promoted oxidation of methyl linolenate in octadecane oil-in-water emulsions. Octadecane and methyl linolenate oil-in-water emulsions were prepared that contained droplets having the octadecane as either liquid or solid. The physical state of the octadecane was confirmed by a differential scanning calorimeter (DSC). The effect of the physical state of the lipid on oxidation rates was determined as a function of iron concentration (80 and 160 microM), pH (3.0 or 7.0), emulsifier type, and cooling rate. Oxidation of methyl linolenate was determined by lipid hydroperoxides and thiobarbituric acid reactive substances (TBARS). Emulsions containing solid octadecane had higher rates of lipid hydroperoxide and TBARS formation than those containing liquid octadecane. The rate at which the emulsions were cooled had no influence on oxidation rates. Oxidation rates in both emulsions increased with increasing iron concentration and decreasing pH. Oxidation rates were lowest in emulsions with cationic droplet membranes (dodecyl trimethylammonium bromide-stabilized), presumably due to the repulsion of iron from the oxidizable methyl linolenate in...Continue Reading

Citations

May 20, 2011·Journal of Agricultural and Food Chemistry·Leonardo Cornacchia, Yrjo H Roos
Jun 15, 2010·Critical Reviews in Food Science and Nutrition·Caitlin S BoonEric A Decker
May 25, 2010·Journal of Food Science·G M Huber, H P V Rupasinghe
Apr 6, 2012·Advances in Colloid and Interface Science·David Julian McClements
May 17, 2015·Advances in Nutrition·Samantha A VieiraEric A Decker
Mar 16, 2013·Journal of Food Science·Sonia CalligarisMaria Cristina Nicoli
Feb 5, 2021·International Journal of Pharmaceutics·Aldemar Gordillo-GaleanoClaudia Elizabeth Mora-Huertas
Apr 20, 2021·Free Radical Research·Mike LangeMaria Fedorova

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