July
2012
Volume
89
Number
4
Pages
198
—
204
Authors
El-Sayed M. Abdel-Aal,1,2
Thin-Miew Choo,3
Simarata Dhillon,1 and
Iwona Rabalski1
Affiliations
Agriculture and Agri-Food Canada, Guelph Food Research Centre, 93 Stone Road West, Guelph, ON, Canada, N1G 5C9.
Corresponding author. Phone: (519) 780-8031. Fax: (519) 829-2600. E-mail: elsayed.abdelaal@agr.gc.ca
Agriculture and Agri-Food Canada, Eastern Cereal and Oilseed Research Centre, 960 Carling Ave, Ottawa, ON, Canada, K1A 0C6.
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RelatedArticle
Accepted June 4, 2012.
Abstract
ABSTRACT
Barley is considered a healthy food because of its high content of β-glucan and phenolic antioxidants. In the current study, 28 black, blue, and yellow barleys were investigated in terms of their composition of free and bound phenolic acids and 2,2-diphenyl-1-picrylhydrazyl radical scavenging capacity. Free phenolics were based on aqueous methanol extraction, whereas bound phenolics were extracted following alkaline hydrolysis. Phenolics were then separated and quantified by liquid chromatography and the Folin–Ciocalteu method. Significant differences were observed between the three barley color groups, and within each color group a wide range of phenolics concentrations existed. Ferulic acid was the predominant phenolic acid in free and bound extracts, followed by p-coumaric acid in all the barleys investigated. Total phenols content and individual phenolic acids strongly correlated with free radical scavenging capacity of barley. Black and blue barley were found to be related and distinct from yellow barley. The results showed significant variations in phenolics among barleys, with a potential for the development of barley grains with high content of phenolic compounds as antioxidant potential.
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ArticleCopyright
© 2012 Department of Agriculture and Agri-Food, Government of Canada.