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Oxygenated fatty acids of oil from sunflower seeds after prolonged storage

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Lipids

Abstracts

Chemical analysis of a number of sunflower (Helianthus annuus) seed oil samples revealed a low and variable percentage of hydrogen bromide-reactive material. To characterize the compounds responsible for this reactivity, oil was extracted from selected introductions from Uruguay, Turkey, and Yugoslavia that had been subjected to prolonged storage. Two epoxy fatty acids and two conjugated dienolic acids were isolated from the methyl esters derived from these sunflower seed oils by using a combination of column chromatography and countercurrent distribution. The epoxy acids arecis-9,10-epoxystearic acid (0.5%) andcis-9,10-epoxy-cis-12-octadecenoic (coronaric) acid (2.2%). Characterization of the dienols revealed that they are 9-hydroxy-trans-10,cis-12-octadecadienoic acid (1.2%) and 13-hydroxy-cis-9,trans-11-octadecadienoic acid (1.3%). Fresher seed of some of these introductions contained less of the oxygenated components.

Oil from recently produced seed of selected high-oil Russian sunflower varieties, including some currently grown in the United States, contained no more than trace amounts of oxygenated acids. Though the relative contributions of genetic and environmental factors toward genesis of oxygenated acids are not established, increase of those acids in some sunflower lines as a result of storage has been demonstrated.

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Author notes

  1. R. M. Freidinger (Summer Trianee, 1965–1968)

    Present address: Dept. of Chemistry, University of Illinois, Urbana, Illinois

Authors and Affiliations

  1. Northern Regional Research Laboratory, 61604, Peoria, Illinois

    K. L. Mikolajczak, R. M. Freidinger (Summer Trianee, 1965–1968), C. R. Smith Jr. & I. A. Wolff

Authors
  1. K. L. Mikolajczak
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  2. R. M. Freidinger
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  3. C. R. Smith Jr.
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  4. I. A. Wolff
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Additional information

No. Utiliz. Res. Dev. Div., ARS, USDA.

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Mikolajczak, K.L., Freidinger, R.M., Smith, C.R. et al. Oxygenated fatty acids of oil from sunflower seeds after prolonged storage. Lipids 3, 489–494 (1968). https://doi.org/10.1007/BF02530891

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  • DOI: https://doi.org/10.1007/BF02530891

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