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基于两种主成分分析方法分析石斛化学成分差异 被引量:3
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作者 钟伟萍 罗阳 +3 位作者 陈懿瑶 李小倩 王梦妍 田孟良 《天然产物研究与开发》 CAS CSCD 北大核心 2018年第12期2049-2055,共7页
探索相关性矩阵和协方差矩阵两种算法的主成分分析方法的差异。本文采用两种主成分分析方法分别计算色谱技术检测得到的石斛化学成分并进行聚类讨论。结果表明在16种石斛植物中得到的11种化学成分含量差异明显,通过相关性矩阵和协方差... 探索相关性矩阵和协方差矩阵两种算法的主成分分析方法的差异。本文采用两种主成分分析方法分别计算色谱技术检测得到的石斛化学成分并进行聚类讨论。结果表明在16种石斛植物中得到的11种化学成分含量差异明显,通过相关性矩阵和协方差矩阵两种算法提取得到的主成分及其次序有一定差异,结合聚类分析表明两种聚类结果也存在差异。因此,在对近缘种植物天然产物成分进行差异分析或化学成分聚类,甚至在药材类真伪品鉴别的研究中,建立高效、精准的检测手段与选择适当的数据分析方法同等重要。 展开更多
关键词 成分分析 石斛化学成分 色谱技术
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Chemical Constituents from the Flowers of Dendrobium chrysanthum
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作者 Xiaoling WEN Yajuan WANG +3 位作者 Lijun CHEN Kaili ZHANG Jun ZHANG Yupeng LI 《Agricultural Science & Technology》 CAS 2014年第10期1629-1630,1633,共3页
This study aimed to investigate the chemical constituents from the flowers of Dendrobium chrysanthum and determine its bioactive compounds. [Method] The compounds were extracted by 95% alcohol and isolated by column c... This study aimed to investigate the chemical constituents from the flowers of Dendrobium chrysanthum and determine its bioactive compounds. [Method] The compounds were extracted by 95% alcohol and isolated by column chromatography on silica gel and Sephadex LH-20. Their structures were identified by spectroscopic analysis (1H NMR, 13CNMR and ElMS). [Result] Nine compounds were obtained and identified as stigmasterol , β-sitosterol , linoleic acid , stigmast-4-en-3-one , dibutyl phthalate , moscatilin , ergosterol , ergosterol peroxide and daucosterol . [Conclusion] Al compounds were isolated from its flowers for the first time. 展开更多
关键词 Dendrobium chrysanthum Medicinal plant Chemical constituents
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