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Antioxidant Activity of the Extractives from the Needles of Picea abies Karsten  

Lee, Sang-Keug (Department of Wood Chemistry & Microbiology, Korea Forest Research Institute)
Bae, Young-Soo (Department of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
Publication Information
Journal of Korean Society of Forest Science / v.95, no.4, 2006 , pp. 429-434 More about this Journal
Abstract
The dried needles (1.5 kg) of Picea abies Karsten were ground, extracted with acetone-$H_2O$ (7:3, v/v), concentrated, and fractionated with a series of n-hexane, methylene chloride, ethyl acetate and water on a separatory funnel. Each fraction was freeze dried, then a portion of ethyl acetate soluble powder was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-n-hexane mixture as eluents. The isolated compounds were identified by cellulose TLC, $^1H$-, $^{13}C$-NMR, FAB and EI-MS. (+)-catechin (compound I), (-)-epicatechin (compound II), kaempferol-3-O-${\beta}$-D-glucopyranoside (compound III), 4-hydroxyacetophenone (compound IV) were isolated from the ethyl acetate soluble fraction and (+)-catechin (compound I), protocatechuic acid (compound V) were isolated from the $H_2O$ soluble fraction of P. abies needle. The antioxidative activities of each fraction and the isolated compounds were tested by DPPH radical scavenging method, and EtOAc soluble fraction, (+)-catechin and (-)-epicatechin showed similar values to ${\alpha}$-tocopherol and BHT as controls.
Keywords
Picea abies; 4-hydroxyacetophenone; protocatechuic acid; HPLC; DPPH radical;
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