Evaluation of antioxidant activity of vegetables from Okinawa prefecture and determination of some antioxidative compounds

We examined the phenolic contents of 45 species of vegetables and their radical scavenging activities for 1,1-diphenyl-2-picrylhydrazyl radical (DPPH·). High contents of phenolic compounds and strong DPPH·scavenging activities were observed in extracts from Nishiyomogi, Ryukyuyomogi, Aojiso, Morohei...

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Bibliographic Details
Published in:Food Science and Technology Research 2006, Vol.12(1), pp.8-14
Main Authors: Maeda, G, Takara, K, Wada, K, Oki, T, Masuda, M, Ichiba, T, Chuda, Y, Ono, H, Suda, I
Format: Article
Language:English
Subjects:
antioxidant
antioxidant activity
antioxidants
caffeic acid
chemical analysis
chemical composition
chemical structure
chicoric acid
chlorogenic acid
Crepidiastrum lanceolatum
free radical scavengers
luteolin
medicinal plants
Oriental traditional medicine
plant pigments
polyphenol
polyphenols
varieties
vegetables
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Summary:We examined the phenolic contents of 45 species of vegetables and their radical scavenging activities for 1,1-diphenyl-2-picrylhydrazyl radical (DPPH·). High contents of phenolic compounds and strong DPPH·scavenging activities were observed in extracts from Nishiyomogi, Ryukyuyomogi, Aojiso, Moroheiya, Hosobawadan, Bajiru, Ensai, Yaeyamakazura, Suizenjina, Botanbouhuu and Uikyou. Eight of these vegetables are traditional foods in Okinawa. These showed strong radical scavenging activities for the superoxide radical (O2-·) and tert-butylhydroperoxyl radical (t-BuOO·). We found five antioxidative phenolic compounds, D(+)-chicoric acid, chlorogenic acid, caffeic acid, luteolin 7-O-β-D-glucopyranoside, and luteolin 7-O-β-D-glucuronide, in Hosobawadan (Crepidiastrum lanceolatum Nakai). Their detailed structures were determined using 1H-NMR, 13C-NMR, MS, and UV spectrometry.
ISSN:1344-6606
1881-3984
DOI:10.3136/fstr.12.8