Summary
Efforts have recently intensified on studies related to the isolation, characterization, and application of natural antioxidants to foods. Endogenous plant antioxidants are believed to inhibit food lipids against peroxidation and also to offer protection against oxidative damage to membrane functions and formation of precursors of carcinogens. Accordingly, we prepared a number of extracts from oilseeds, namely, canola, mustard, and flax. The phenolic isolates so obtained were fractionated and partially characterized. Antioxidant activity of isolates as such or after fractionation was evaluated in a β-carotene/linoleate model system. The results indicated that the antioxidant potency of the isolates depends on the source, content, and structural features of the phenolic compounds present. The component with the strongest antioxidant activity in canola meal was identified as l-0-β-D-glucopyranosyl sinapate. Ferulate derivatives were tentatively identified in mustard meal, and the presence of lignans was envisaged in flax extracts. Application of defatted meals and/or their extracts to oil and meat systems indicated strong inhibitory effects against lipid peroxidation and their potential for inclusion in lipid-containing foods as replacements for synthetic antioxidants.
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© 1997 Springer Japan
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Shahidi, F. (1997). Natural Antioxidants from Oilseeds. In: Ohigashi, H., Osawa, T., Terao, J., Watanabe, S., Yoshikawa, T. (eds) Food Factors for Cancer Prevention. Springer, Tokyo. https://doi.org/10.1007/978-4-431-67017-9_59
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DOI: https://doi.org/10.1007/978-4-431-67017-9_59
Publisher Name: Springer, Tokyo
Print ISBN: 978-4-431-67019-3
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