Ding Zhong-tao
Yunnan University
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Featured researches published by Ding Zhong-tao.
Molecules | 2010
Tai Zhigang; Cai Le; Dai Lin; Sun WeiJun; Zhe Wei; Yang Yabin; Cao Qiue; Ding Zhong-tao
The edible flowers of Caragana sinica are used in China a kind of health-promoting vegetable. In this study, the antioxidant activities of its ethanol extract, as well as its petroleum ether, ethyl acetate, n-butanol and water fractions, were evaluated through in vitro model systems including the DPPH, FRAP and β-carotene bleaching methods. Among the C. sinica flower extracts the ethyl acetate fraction was the most effective. Correlation analysis suggested that flavonoids might be the major contributors to the high antioxidant activity of this flower. Six flavonoids including quercetin (1), isoquercitrin (2), rutin (3), quercetin-3′-O-methyl-3-O-α-L-rhamnopyranosyl (1→6)-β-D-glucopyranoside (4), typhaneoside (5) and quercetin-3-O-β-D-glucopyranosyl(1→2)[α-L-rhamnopyranosyl (1→6)]-β-D-glucopyranoside (6), were isolated from this flower for the first time. Their contents were determined by a HPLC method. Compounds 3 and 4 were found to be the major flavonoids, with concentrations of 1.20 ± 0.07 and 3.94 ± 0.12 mg/g dry sample, respectively. These results demonstrated that the C. sinica flowers may be valuable natural antioxidant sources and are potentially applicable in the health food industry.
Natural Product Research and Development | 2011
Ding Zhong-tao
Natural Product Research and Development | 2004
Ding Zhong-tao
Journal of Yunnan University | 2011
Ding Zhong-tao
Journal of Yunnan University | 2008
Ding Zhong-tao
RSC Advances (Web) | 2017
Lin Na; Zhang Qin; Xia Xin; Liang Mengyu; Zhang Shihong; Zheng Liyan; Cao Qiue; Ding Zhong-tao
Phytochemistry Letters | 2017
Li Xue-Jiao; Dong Jianwei; Cai Le; Wang Jia-Peng; Yu Nen-Xiang; Ding Zhong-tao
Archive | 2017
Cai Le; Luo Wei; Ding Zhong-tao; Dong Jianwei
Archive | 2017
Cai Le; Ding Zhong-tao; Xing Yun; Yin Tianpeng
Yunnan Daxue Xuebao. Ziran Kexue Ban | 2016
Fang Yunshan; He Yu; Yang Minghui; Cai Le; Ding Zhong-tao