Effect of acidic condition on phenolic composition and antioxidant potential of aqueous extracts from sorghum (Sorghum Bicolor) bran

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dc.contributor.author Shelembe, Jeremiah Sijubo
dc.contributor.author Cromarty, Allan Duncan
dc.contributor.author Bester, Megan Jean
dc.contributor.author Minnaar, Amanda
dc.contributor.author Duodu, Kwaku Gyebi
dc.date.accessioned 2014-05-16T11:54:50Z
dc.date.issued 2014-02
dc.description.abstract The effect of extraction under acidic condition (pH 2) on phenolic compounds and antioxidant potential of aqueous extracts fromcondensed tannin sorghumbran was investigated. The protective effect of extracts prepared with water (WE) and acidified water (pH 2) (AWE) against free radical-induced red blood cell hemolysis and low-density lipoprotein (LDL) oxidation was determined. The % yield (grams of freeze-dried aqueous extract/100 g of dry sample weight), total phenolic, flavonoid content and 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activity were significantly higher in AWE than WE. AWE had 19% higher overall content of identified phenolic acids and flavonoids thanWE.AWE showed a significantly higher degree of protection against erythrocytemembrane oxidation than WE. Both extracts showed protective effect against LDL oxidation. However, there were no significant differences in tannin content and oxygen radical absorbance capacity values between the extracts. Extracting sorghum bran under acidic conditions may release bound phenolic compounds thereby improving the health-promoting benefits of extracts from sorghumbran. en_US
dc.description.embargo 2015-02-28
dc.description.librarian hb2014 en_US
dc.description.uri http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-4514 en_US
dc.identifier.citation Shelembe, JS, Cromarty, D, Bester, M, Minnaar, A & Duodu, KG 2014, 'Effect of acidic condition on phenolic composition and antioxidant potential of aqueous extracts from sorghum (Sorghum Bicolor) bran', Journal of Food Biochemistry, vol. 38, no. 1, pp. 110-118. en_US
dc.identifier.issn 0145-8884 (print)
dc.identifier.issn 1745-4514 (online)
dc.identifier.other 10.1111/j.1745-4514.2012.00650.x
dc.identifier.uri http://hdl.handle.net/2263/39806
dc.language.iso en en_US
dc.publisher Wiley- Blackwell en_US
dc.rights © 2013 Wiley Periodicals, Inc. The definite version is available at : http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1745-4514 en_US
dc.subject Sorghum en_US
dc.subject Bran en_US
dc.subject Antioxidant activity en_US
dc.subject Phenolics en_US
dc.subject LDL oxidation en_US
dc.subject Erythrocyte hemolysis en_US
dc.title Effect of acidic condition on phenolic composition and antioxidant potential of aqueous extracts from sorghum (Sorghum Bicolor) bran en_US
dc.type Preprint Article en_US


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