Chun Yi
Chinese Academy of Sciences
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Featured researches published by Chun Yi.
Food Chemistry | 2008
Lingzhao Wang; Bao Yang; Xiuqiao Du; Chun Yi
Supercritical carbon dioxide extraction was employed to extract flavonoids from Pueraria lobata. The optimal conditions for flavonoid extraction were determined by response surface methodology. Box-Behnken design was applied to evaluate the effects of three independent variables (pressure, temperature and co-solvent amount) on the flavonoid yield of P. lobata. Correlation analysis of the mathematical-regression model indicated that a quadratic polynomial model could be employed to optimise the supercritical carbon dioxide extraction of flavonoids. From response surface plots, pressure, temperature and co-solvent amount exhibited independent and interactive effects on the extraction of flavonoids. The optimal conditions to obtain the highest flavonoid yield of P. lobata were a pressure of 20.04MPa, a temperature of 50.24°C and a co-solvent amount of 181.24ml. Under these optimal conditions, the experimental values agreed with the predicted values, using analysis of variance, indicating a high goodness of fit of the model used and the success of response surface methodology for optimising supercritical carbon dioxide extraction of flavonoids from P. lobata.
BioMed Research International | 2009
K. Nagendra Prasad; Jing Hao; Chun Yi; Dandan Zhang; Shengxiang Qiu; Yueming Jiang; Mingwei Zhang; Feng Chen
Antioxidant activities of wampee peel extracts using five different solvents (ethanol, hexane, ethyl acetate, butanol and water) were determined by using in-vitro antioxidant models including total antioxidant capability, 1,1-diphenyl-2-picryl hydrazyl (DPPH) radical scavenging activity, reducing power, and superoxide scavenging activity. Ethyl acetate fraction (EAF) exhibited the highest antioxidant activity compared to other fractions, even higher than synthetic antioxidant butylated hydroxyl toluene (BHT). In addition, the EAF exhibited strong anticancer activities against human gastric carcinoma (SGC-7901), human hepatocellular liver carcinoma (HepG-2) and human lung adenocarcinoma (A-549) cancer cell lines, higher than cisplatin, a conventional anticancer drug. The total phenolic content of wampee fraction was positively correlated with the antioxidant activity. This is the first report on the antioxidant and anticancer activities of the wampee peel extract. Thus, wampee peel can be used potentially as a readily accessible source of natural antioxidants and a possible pharmaceutical supplement.
Innovative Food Science and Emerging Technologies | 2009
K. Nagendra Prasad; En Yang; Chun Yi; Mouming Zhao; Yueming Jiang
Food Chemistry | 2009
Chun Yi; John Shi; Sophia Jun Xue; Yueming Jiang; Dong Li
Journal of Food Engineering | 2009
John Shi; Chun Yi; Sophia Jun Xue; Yueming Jiang; Ying Ma; Dong Li
Journal of Phytopathology | 2008
Chun Yi; Hongxia Qu; Yueming Jiang; John Shi; Xuewu Duan; D. C. Joyce; Yaping Li
Food Chemistry | 2010
Chun Yi; Yueming Jiang; John Shi; Hongxia Qu; Sophia Jun Xue; Xuewu Duan; Jingyu Shi; Nagendra K. Prasad
Food Chemistry | 2009
Chun Yi; John Shi; John K. G. Kramer; Sophia Jun Xue; Yueming Jiang; Mingwei Zhang; Ying Ma; Joseph Pohorly
Lwt - Food Science and Technology | 2010
John Shi; Chun Yi; Xingqian Ye; Sophia Jun Xue; Yueming Jiang; Ying Ma; Donghong Liu
Food Chemistry | 2010
Jian Sun; Yueming Jiang; John Shi; Xiaoyi Wei; Sophia Jun Xue; Jinyu Shi; Chun Yi