کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1207910 | 1493723 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization of monomeric and oligomeric flavan-3-ols from barley and malt by liquid chromatography–ultraviolet detection–electrospray ionization mass spectrometry Characterization of monomeric and oligomeric flavan-3-ols from barley and malt by liquid chromatography–ultraviolet detection–electrospray ionization mass spectrometry](/preview/png/1207910.png)
The pattern of the monomeric and oligomeric flavan-3-ols for 10 barley varieties and the corresponding malts were identified and quantified using high-performance liquid chromatography–ultraviolet detection–electrospray ion trap mass spectrometry. The Folin–Ciocalteau and the vanillin spectrophotometric assays were used for the assessment of the total polyphenol and total flavan-3-ol content, respectively, and the antioxidant activity was determined as the 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and the ferricyanide reducing power. Catechin and prodelphinidin B3 were respectively the major monomeric and dimeric flavan-3-ols. Moreover, prodelphinidin B3 was shown to be the main contributor for the radical scavenging activity both for barley and malt.
Journal: Journal of Chromatography A - Volume 1189, Issues 1–2, 2 May 2008, Pages 398–405