Chia seeds as a source of natural lipid antioxidants
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Chia (Salvia sp) seeds were investigated as a source of natural lipid antioxidants. Methanolic and aqueous extracts of defatted chia seeds possessed potent antioxidant activity. Analysis of 2 batches of chia-seed oils demonstrated marked difference in the fatty acid composition of the oils. In both batches, the oils had high concentrations of polyunsaturated fatty acids. The major antioxidant activity in the nonhydrolyzed extract was caused by flavonol glycosides, chlorogenic acid (7.1 × 10−4 mol/kg of seed) and caffeic acid (6.6 × 10−3 m/kg). Major antioxidants of the hydrolyzed extracts were flavonol aglycones/kaempferol (1.1 × 10−3 m/kg), quercetin (2.0 × 10−4 m/kg) and myricetin (3.1 × 10−3 m/kg); and caffeic acid (1.35 × 10−2 m/kg). Two methods were used to measure antioxidant activities. Both were based on measuring bleaching ofβ-carotene in the coupled oxidation ofβ-carotene and linoleic acid in the presence of added antioxidants.
KeywordsQuercetin Caffeic Acid Flavonol Chlorogenic Acid Kaempferol
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- 1.Pratt, D.E., in Autoxidation in Food and Biological Systems edited by M.G. Simic and M. Karel, Plenum Press, New York and London, 1980.Google Scholar
- 2.Pratt, D.E., in Phenolic, Sulfur and Nitrogen Compounds in Food Flavor, edited by G. Charalambous and I. Katz, ASC Symposium Series No. 26, 1976.Google Scholar
- 4.Parson, M.E., The Wild Flowers of California, Calif. Acad. Sci., San Francisco, CA, 1955.Google Scholar
- 5.Palma, F., M. Donde and W.R.L. Lloyd, JAOCS 24:27 (1947).Google Scholar
- 6.Earle, F.R., T.A. McGuire, J. Mallan, M.O. Bagby and I.A. Wolf, Ibid. 37:48 (1960).Google Scholar
- 8.Bray, H.G., and W.V. Tharpe, in Methods of Biochemical Analysis, edited by D. Glick, John Wiley and Sons, New York, NY, 1954.Google Scholar
- 10.Marco, G.L., JAOCS 45:594 (1968).Google Scholar
- 11.Miller, H.E., Ibid. 48:91 (1971).Google Scholar
- 12.Araujo, J.M.A., Ph.D. Thesis, Purdue University, 1981.Google Scholar