| Literature DB >> 16481160 |
Ching S Lau1, Danielle J Carrier, Robert R Beitle, David I Bransby, Luke R Howard, Jackson O Lay, Rohana Liyanage, Edgar C Clausen.
Abstract
Oxygen radical absorbance capacity (ORAC) values showed that methanolic extracts of Albizia julibrissin foliage displayed antioxidant activity. High performance liquid chromatography (HPLC) and mass spectrometry (MS) techniques were utilized in the identification of the compounds. The analysis confirmed the presence of three compounds in A. julibrissin foliage methanolic extract: an unknown quercetin derivative with mass of 610 Da, hyperoside (quercetin-3-O-galactoside), and quercitrin (quercetin-3-O-rhamnoside). Fast performance liquid chromatography (FPLC) was employed to fractionate the crude A. julibrissin foliage methanolic extract into its individual flavonoid components. The flavonoids were quantified in terms of mass and their respective contribution to the overall ORAC value. Quercetin glycosides accounted for 2.0% of total foliage.Entities:
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Year: 2006 PMID： 16481160 DOI： 10.1016/j.biortech.2005.12.011
Source DB: PubMed Journal: Bioresour Technol ISSN： 0960-8524 Impact factor: 9.642