Characterization and antioxidant activity of flavonoid-rich extracts from leaves of Ampelopsis grossedentata.

  title={Characterization and antioxidant activity of flavonoid-rich extracts from leaves of Ampelopsis grossedentata.},
  author={Jianhua Gao and Benguo Liu and Zheng-xiang Ning and Ruixiang Zhao and Aiyuan Zhang and Qiong Wu},
  journal={Journal of Food Biochemistry},
Leaves of Ampelopsis grossedentata have been consumed in southern China as health tea and herbal medicine. In this study, two kinds of flavonoid-rich extracts from leaves of A. grossedentata were prepared by traditional solvent extraction (product A) and recrystallization (product B). By analysis of ultraviolet-visible (UV) spectrometry, infrared (IR) spectrometry, electrospray ionization mass spectrometry (ESI-MS), nuclear magnetic resonance (NMR) spectrometry and high-performance liquid… Expand
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Abstract A fast and efficient method for purification of dihydromyricetin (3,5,7,3′,4′,5′-six hydroxy-2,3-dihydro flavonol; DMY) from Ampelopsis grossedentata was created by crystallization eightExpand
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