title: [Research on quality changes in ginseng stems and leaves before and after frost].
abstract: The present study is to investigate the quality changes of ginseng stems and leaves before and after frost. The contents changes of ginsenoside, free amino acid, and total phenolic compounds, as well as DPPH radical scavenging effect before and after frost were measured. The content of 9 ginsenoside monomer in ginseng stems was decreased except for Rg, and Re after frost, but in ginseng leaves was all decreased. The total content of amino acids was decreased in ginseng stems after frost, while increased in ginseng leaves. The content of phenolic compounds in ginseng stems and leaves were both decreased after frost while the ability of DPPH radical scavenging was improved. The factor of frost has great impact on the quality of ginseng stems and leaves.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Shuang
authors.initials: S
authors.lastname: Ma
authors.forename: En-Bo
authors.initials: EB
authors.lastname: Cai
authors.forename: Shuang-Li
authors.initials: SL
authors.lastname: Liu
authors.forename: He
authors.initials: H
authors.lastname: Yang
authors.forename: Lian-Xue
authors.initials: LX
authors.lastname: Zhang
authors.forename: Shi-Jie
authors.initials: SJ
authors.lastname: Wang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D017753:Ecosystem; D005615:Freezing; D005894:Panax / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D011786:Quality Control
chemical_list: D004365:Drugs, Chinese Herbal