supercritical carbon dioxide extraction of bioactive compounds from ampelopsis grossedentata stems process optimization and antioxidant activity超临界二氧化碳萃取生物活性化合物的蛇葡萄属grossedentata茎流程优化和抗氧化活性.pdfVIP

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supercritical carbon dioxide extraction of bioactive compounds from ampelopsis grossedentata stems process optimization and antioxidant activity超临界二氧化碳萃取生物活性化合物的蛇葡萄属grossedentata茎流程优化和抗氧化活性.pdf

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supercritical carbon dioxide extraction of bioactive compounds from ampelopsis grossedentata stems process optimization and antioxidant activity超临界二氧化碳萃取生物活性化合物的蛇葡萄属grossedentata茎流程优化和抗氧化活性

Int. J. Mol. Sci. 2011, 12, 6856-6870; doi:10.3390/ijm OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 /journal/ijms Article Supercritical Carbon Dioxide Extraction of Bioactive Compounds from Ampelopsis grossedentata Stems: Process Optimization and Antioxidant Activity Yuefei Wang 1, Le Ying 1, Da Sun 1, Shikang Zhang 2, Yuejin Zhu 2 and Ping Xu 1,* 1 Department of Tea Science, Zhejiang University, Hangzhou 310058, China; E-Mails: tyfwang@ (Y.W.); leying@ (L.Y.); xiaodazi1987@ (D.S.) 2 Hangzhou Tea Research Institute, China COOP, Hangzhou 310016, China; E-Mails: zsk6510@126.com (S.Z.); zhuyuejin57@126.com (Y.Z.) * Author to whom correspondence should be addressed; E-Mail: zdxp@; Tel./Fax: +86-571 Received: 1 August 2011; in revised form: 8 October 2011 / Accepted: 10 October 2011 / Published: 14 October 2011 Abstract: Supercritical carbon dioxide (SC-CO ) extraction of bioactive compounds 2 including flavonoids and phenolics from Ampelopsis grossedentata stems was carried out. Extraction parameters such as pressure, temperature, dynamic time and modifier, were 4 optimized using an orthogonal array design of L9 (3 ), and antioxidant activities of the extracts were evaluated by 2,2-diphenyl-1-picrylhydraz