title: [Study on the extracting of ursolic acid by uniform design].
abstract: Uniform design method was adopted to research the extraction of ursolic acid. The ethanol concentration, the extraction time, the liquid to solid ratio and the extraction times were researched by U7 (7(4)). The optimal conditions were achieved by optimization treatment and confirmed by experiment:the ethanol concentration being 75%, liquid to solid ratio being 7, extraction time 60 minutes, extracted two times.
authors.affiliation: College of Life Science & Technology, Beijing University of Chemical Technology, Beijing.
authors.forename: Zengying
authors.initials: Z
authors.lastname: Liu
authors.forename: Runyu
authors.initials: R
authors.lastname: Ma
authors.forename: Yanhui
authors.initials: Y
authors.lastname: Wang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D031657:Forsythia / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry*; D012044:Regression Analysis; D013678:Technology, Pharmaceutical / Q000379:methods*; D013696:Temperature; D013997:Time Factors; D014315:Triterpenes / Q000032:analysis / Q000302:isolation & purification*; D000097245:Ursolic Acid
chemical_list: D004365:Drugs, Chinese Herbal; D014315:Triterpenes; D000097245:Ursolic Acid