| abstract |
PURPOSE: To obtain the subject extract useful as an antioxidant, aging inhibitor for the skin, etc., by extracting ginkgo leaves with a hydrophilic organic solvent and subjecting the resultant crude extract solution (extract) to adsorption on an acrylic ester polymer-based synthetic adsorbent. n CONSTITUTION: Ginkgo leaves are extracted with a hydrophilic organic solvent(e. g. methanol) to provide a crude extract solution (extract) and a synthetic adsorbent such as an acrylic ester polymer-based adsorbent is used to readily afford an extract with a high content of flavonoids. n COPYRIGHT: (C)1991,JPO&Japio |