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New Constituents from the Fresh Stems of Opuntia Dillenii 被引量:2
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作者 qiuying-kun CHENYing-jie +2 位作者 PEIYu-pin MatsudaHisashi YoshikawaMasayuki 《Journal of Chinese Pharmaceutical Sciences》 CAS 2003年第1期1-5,共5页
Aim To study the chemical composition of Opuntia dillenii Haw. Methods Manykinds of chromatogra-phy methods were used in the isolation procedure, while the structures ofisolated compounds were determined on the aids o... Aim To study the chemical composition of Opuntia dillenii Haw. Methods Manykinds of chromatogra-phy methods were used in the isolation procedure, while the structures ofisolated compounds were determined on the aids of NMR and MS spectral analysis. Result Three newcompounds, together with 14 known compounds, were isolated form the 80% ethanolic extract of itsstems. Conclusion The three new compounds, opuntioside Ⅰ (2), 4-ethoxyl-6-hydroxymethyl-α-pyrone(3) and kaempferol 7-O-β-D-glucopyranosyl (1→4)-β-D-glucopyranoside (4), were characterized. 展开更多
关键词 opuntia dillenii opuntioside 4-ethoxyl-6-hydroxymethyl-α-pyrone kaempferol 7- O-β-D-glucopyranosyl (1→4)-β-D-glucopyranoside
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气藏束缚水饱和度实验测试与机理 被引量:5
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作者 桂婷婷 魏东 +3 位作者 王继平 朱秋影 方飞飞 谢坤 《大庆石油地质与开发》 CAS CSCD 北大核心 2017年第1期81-84,共4页
气藏在开发过程中普遍产水,不同渗透率砂岩储层含水饱和度是气藏产能评价的重要依据。采用气水相对渗透率测试与铸体薄片、高压压汞等实验相结合的方法,测试渗透率为(0.013~14.22)×10-3μm2的砂岩岩心的相对渗透率,并获得其孔隙结... 气藏在开发过程中普遍产水,不同渗透率砂岩储层含水饱和度是气藏产能评价的重要依据。采用气水相对渗透率测试与铸体薄片、高压压汞等实验相结合的方法,测试渗透率为(0.013~14.22)×10-3μm2的砂岩岩心的相对渗透率,并获得其孔隙结构参数。结果表明:岩心渗透率越大,则束缚水饱和度越低,但不同渗透区间,束缚水饱和度的变化幅度不同;岩心的孔隙与喉道发育越好,束缚水饱和度越低。机理认识有助于制定含水气藏合理工作制度与开发方案。 展开更多
关键词 砂岩气藏 束缚水饱和度 渗透率 气水相对渗透率曲线 孔隙结构
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