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Catechin Content and Antioxidative Effect from Rosa davurica Pall  

Shin, In-Cheol (Gangwon Institute of Health and Environment)
Jeong, Kyung-Jin (Gangwon Institute of Health and Environment)
Shim, Tae-Heum (Gangwon Institute of Health and Environment)
Oh, Heung-Seok (Gangwon Institute of Health and Environment)
Park, Sang-Kyun (Gangwon Institute of Health and Environment)
Cheung, Eui-Ho (Gangwon Institute of Health and Environment)
Kim, Suk-Nam (Jungsun-RoseHip)
Kim, Gwang-Gee (Jungsun Agriculture Technology Center)
Choi, Dae-Sung (Jungsun Agriculture Technology Center)
Kwon, Yong-Soo (College of Pharmacy, Gangwon National University)
Kim, Chang-Min (College of Pharmacy, Gangwon National University)
Sa, Jae-Hoon (Gangwon Institute of Health and Environment)
Publication Information
Korean Journal of Pharmacognosy / v.33, no.3, 2002 , pp. 177-181 More about this Journal
Abstract
This study was carried out to investigate the antioxidative activities of Rosa davurica Pall for the purpose of development of novel antioxidant from natural products. Antioxidant activities of four different parts of Rosa davurica Pall such as fruit, leaf, stem and root were examined by measuring the radical scavenging effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. The methanol extract from the root of Rosa davurica Pall showed the highest antioxidative activity among 16 samples tested. And, we also tested radical scavenging effects of 5 different extract compartments(Hexane, $CHCl_3$, EtOAc, BuOH and $H_2O$ fraction). EtOAc and BuOH fractions from the root of Rosa davurica Pall exhibited antioxidative activities higher to those of natural, ${\alpha}-tocopherol$ or synthetic antioxidants, BHT. The antioxidative substance of EtOAc fraction from the root of Rosa davurica Pall was successively purified with silica gel adsorption column chromatography and Sephadex LH-20 column chromatography. The purified active substance was isolated as crystal and identified as (+)-catechin by $^{l}H-NMR$ and $^{13}C-NMR$. This compound exhibited DPPH radical scavenging activity with the $IC_50$ value of $1.7\;{\mu}g/ml$. In the analysis of catechin content, the leaf extracts contained the highest catechin, and fruit extracts contained the lowest catechin. Considering antioxidative activity on DPPH assay, the extracts of Rosa davurica Pall showed a possibility to be used as a new material for natural antioxidant and functional food.
Keywords
Rosa davurica Pall; antioxidant; DPPH radical scavenging activity; (+)-catechin;
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