Jeong-Yong Cho, Hyun-Jung Ryu, Soo-Hyun Ji, Jae-Hak Moon, Keun-Hyung Park, Kyung-Hee Jung
언어
영어(ENG)
URL
https://www.earticle.net/Article/A108263
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원문정보
초록
영어
Hot water extracts of Camellia japonica flower buds were found to have the higher 1,1-diphenyl-2-picrylhydrazyl(DPPH) radical scavenging activity than the other solvent extracts. Five phenolic compounds were isolated and purified fromthe ethyl acetate soluble-neutral fraction of hot water extracts by Sephadex LH-20 column chromatography and octadecylsilane-high performance liquid chromatography using the guided assay of DPPH radical scavenging. Based on massspectrometer and nuclear magnetic resonance, the isolated compounds were identified as p-hydroxybenzaldehyde (1), vanillin(2), dehydroxysynapyl alcohol (3), 7S,7'S,8R,8'R-icariol A2 (4), and (-)-epicatechin (5). Four compounds (1-4) except for 5were newly identified in this plant. Their DPPH radical scavenging activities as 50% scavenging concentration decreased inorder to 5 (20µM)>α-tocopherol (29µM)>4 (67µM)>3 (72µM)>1=2 (>250µM). These results indicate that theantioxidant effect of the hot water extract of C. japonica flower buds may partially due to 5 isolated phenolic compounds.
목차
Abstracts Introduction Materials and Methods Results and Discussion References
Jeong-Yong Cho [ Department of Food Science & Technology, and Functional Food Research Center, Chonnam National University, Gwangju 500-757, Korea ]
Hyun-Jung Ryu [ Department of Food Science & Technology, and Functional Food Research Center, Chonnam National University, Gwangju 500-757, Korea ]
Soo-Hyun Ji [ Department of Food Science & Technology, and Functional Food Research Center, Chonnam National University, Gwangju 500-757, Korea ]
Jae-Hak Moon [ Department of Food Science & Technology, and Functional Food Research Center, Chonnam National University, Gwangju 500-757, Korea ]
Kyung-Hee Jung [ Jeonnam Biotechnology Research Center, Naju, Jeonnam 520-330, Korea ]
Keun-Hyung Park [ Department of Food Science & Technology, and Functional Food Research Center, Chonnam National University, Gwangju 500-757, Korea ]
Corresponding author