study on the influence of fucosterol on thermal polymerisation of purified high oleic sunflower triacylglycerols

Delta(5)-Avenasterol, an ethylidene side-chain phytosterol, was described as an antipolymerisation agent for thermooxidised oils. This paper investigates the potential of its commercially available geometrical isomer, fucosterol, as an antipolymerisation agent for high oleic sunflower oil (HOSO). Pu...

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Bibliographic Details
Published in:Journal of the science of food and agriculture 1999-03, Vol.79 (4), p.573-579
Main Authors: Lampi, A.M, Dimberg, L.H, Kamal-Eldin, A
Format: Article
Language:English
Subjects:
alpha-tocopherol
antioxidants
antipolymerisation
Applied sciences
Biological and medical sciences
Exact sciences and technology
Fat industries
Food industries
fucosterol
Fundamental and applied biological sciences. Psychology
heat treatment
high oleic sunflower triacylglycerols
inhibition
oleic acid
Organic polymers
oxidation
oxidative polymerization
Physicochemistry of polymers
phytosterols
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
stigmasterol
sunflower oil
thermooxidation
triacylglycerols
Δ5-avenasterol
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Summary:Delta(5)-Avenasterol, an ethylidene side-chain phytosterol, was described as an antipolymerisation agent for thermooxidised oils. This paper investigates the potential of its commercially available geometrical isomer, fucosterol, as an antipolymerisation agent for high oleic sunflower oil (HOSO). Purified triacylglycerols were prepared from HOSO and incubated in an oven, at 180 degrees C, with or without fucosterol, sitosterol and stigmasterol. Analysis of polymers and dimers (by high-performance size exclusion chromatography) showed that fucosterol did not affect the rate of polymerisation of purified HOSO triacylglycerols in our model. Comparison with alpha-tocopherol, showed that this tocol inhibited the polymerisation of the oil while fucosterol did not.
ISSN:0022-5142
1097-0010
DOI:10.1002/(SICI)1097-0010(19990315)79:4<573::AID-JSFA219>3.0.CO;2-P