Antioxidant effect of a crude phenolic extract from sorghum bran in sunflower oil in the presence of ferric ions

dc.contributor.authorSikwese, F.E.
dc.contributor.authorDuodu, Kwaku Gyebi
dc.contributor.emailgyebi.duodu@up.ac.zaen
dc.date.accessioned2007-07-30T09:52:22Z
dc.date.available2007-07-30T09:52:22Z
dc.date.issued2007
dc.description.abstractWhole grain condensed tannin sorghum, its bran and a crude phenolic extract (CPE) prepared from the bran were evaluated for total phenols (TP), condensed tannins (CT) and antioxidant activity (AA). Antioxidant effect of the CPE from the sorghum bran was evaluated in sunflower oil in the presence of ferric ions by measuring peroxide values (PVs) and anisidine values (AVs) during storage at 65 °C, in comparison with tertiary butyl hydroquinone (TBHQ). Sorghum bran contained three times more TP and AA, and seven times more CT than the whole grain. The CPE had highest levels of TP, CT and AA. Sunflower oil with CPE had lower PVs and AVs compared to control samples. Oil samples with TBHQ had PVs lower than, but AVs similar to samples containing CPE. In the presence of ferric ions, the CPE was less effective in reducing PVs, but was more effective than TBHQ in reducing AVs.en
dc.description.sponsorshipThe authors greatly acknowledge financial support from the German Academic Exchange Service (DAAD).en
dc.format.extent223429 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationSikwese, FE & Duodu, KG 2007, ‘Antioxidant effect of a crude phenolic extract from sorghum bran in sunflower oil in the presence of ferric ions’, Food Chemistry, vol. 104, issue 1, pp. 324-331 [http://www.sciencedirect.com/science/journal/03088146]en
dc.identifier.issn0308-8146
dc.identifier.other10.1016/j.foodchem.2006.11.042
dc.identifier.urihttp://hdl.handle.net/2263/3202
dc.language.isoenen
dc.publisherElsevieren
dc.rightsElsevieren
dc.subjectSorghum branen
dc.subjectPhenolic extracten
dc.subjectAntioxidant activityen
dc.subjectLipid oxidationen
dc.subjectFerric ionsen
dc.subjectPeroxide valueen
dc.subjectAnisidine valueen
dc.subject.lcshSorghumen
dc.subject.lcshSunflower seed oilen
dc.subject.lcshBranen
dc.titleAntioxidant effect of a crude phenolic extract from sorghum bran in sunflower oil in the presence of ferric ionsen
dc.typePostprint Articleen

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