Abstract
The endogenous minor components from canola, rice bran, sesame and palm oils including selected phospholipids, and various combinations of tocopherol isomers were tested during frying using canola oil triacylglycerols as the frying medium. Thermo-oxidative degradation was assessed by measurement of the total polar components, the rate of volatile carbonyl compounds and 4-hydroxynonenal formation. All the tested minor components protected to a different extent canola triacylglycerides from thermo-oxidative degradation during frying. No significant differences were observed in the protection of the triacylglycerides among all the tested tocopherol isomers and their mixtures. Irrespective of the composition of tocopherol homologous, an increase in the added amounts above 1,000 μg/g did not improve protection. Minor components isolated from rice bran and sesame oils offered better protection during canola triacylglycerides frying than endogenous minor components isolated from canola oil. When 0.2% phosphatidylcholine or phosphatidylethanolamine was added to the canola triacylglycerides, the amount of formed polar components decreased twice as compared to the tocopherol isomers. Accordingly, by optimizing the composition and the concentration of the endogenous minor components, the frying performance of oil can be significantly enhanced.
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This work was financed by the Alberta Value Added Corporation, the Agriculture Funding Consortium project #2006F018R and Bioactive Oil Program.
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Aladedunye, F.A., Przybylski, R. Frying Performance of Canola Oil Triacylglycerides as Affected by Vegetable Oils Minor Components. J Am Oil Chem Soc 89, 41–53 (2012). https://doi.org/10.1007/s11746-011-1887-8
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DOI: https://doi.org/10.1007/s11746-011-1887-8