Two kinds of big sympodial bamboo, D.Yunnanicus Hsueh and Whangee (D. Membranaceus Munro) andtheir physical and mechanical properties have been studied in the paper. The results showed that the whangee hasbetter physi...Two kinds of big sympodial bamboo, D.Yunnanicus Hsueh and Whangee (D. Membranaceus Munro) andtheir physical and mechanical properties have been studied in the paper. The results showed that the whangee hasbetter physical properties than that of the Yunnanicus, such as higher density, lower tangential and longitudinal dryshrinkages. That also showed that Whangee has stronger mechanical properties in MOR and MOE, compressivestrength and shear strength parallel to the grain. Compared with some wood species used in architecture, the physicaland mechanical properties of the two kinds have reached the requirement of some wood architecture structurematerials.展开更多
建立超高效液相色谱-串联质谱(ultra high performance liquid chromatography tandem mass spectrometry,UPLC-MS/MS)法同时测定地道云南知竹酒中9种活性成分(甜菜碱、没食子酸、芦丁、人参皂苷Re、人参皂苷Rg1、人参皂苷Rb1、人参皂...建立超高效液相色谱-串联质谱(ultra high performance liquid chromatography tandem mass spectrometry,UPLC-MS/MS)法同时测定地道云南知竹酒中9种活性成分(甜菜碱、没食子酸、芦丁、人参皂苷Re、人参皂苷Rg1、人参皂苷Rb1、人参皂苷Rd、黄芪甲苷、槲皮素)的含量。采用Agilent SB-C18色谱柱(2.1 mm×50 mm,1.8μm),以水-0.1%甲酸乙腈为流动相,梯度洗脱,流速0.2 mL/min。采用电喷雾离子源进行正负离子切换模式监测,多反应监测模式(multiple reaction monitoring,MRM)用于定量分析。结果表明,地道云南知竹酒中的9个成分在考察的浓度范围内具有良好的线性关系(r>0.9981);检出限为0.07~16.19μg/L,平均加标回收率89.9%~104.2%。该方法简便快速、专属性强、灵敏度高,可用于地道云南知竹酒的质量控制,为其开发利用提供理论依据。展开更多
文摘Two kinds of big sympodial bamboo, D.Yunnanicus Hsueh and Whangee (D. Membranaceus Munro) andtheir physical and mechanical properties have been studied in the paper. The results showed that the whangee hasbetter physical properties than that of the Yunnanicus, such as higher density, lower tangential and longitudinal dryshrinkages. That also showed that Whangee has stronger mechanical properties in MOR and MOE, compressivestrength and shear strength parallel to the grain. Compared with some wood species used in architecture, the physicaland mechanical properties of the two kinds have reached the requirement of some wood architecture structurematerials.
文摘建立超高效液相色谱-串联质谱(ultra high performance liquid chromatography tandem mass spectrometry,UPLC-MS/MS)法同时测定地道云南知竹酒中9种活性成分(甜菜碱、没食子酸、芦丁、人参皂苷Re、人参皂苷Rg1、人参皂苷Rb1、人参皂苷Rd、黄芪甲苷、槲皮素)的含量。采用Agilent SB-C18色谱柱(2.1 mm×50 mm,1.8μm),以水-0.1%甲酸乙腈为流动相,梯度洗脱,流速0.2 mL/min。采用电喷雾离子源进行正负离子切换模式监测,多反应监测模式(multiple reaction monitoring,MRM)用于定量分析。结果表明,地道云南知竹酒中的9个成分在考察的浓度范围内具有良好的线性关系(r>0.9981);检出限为0.07~16.19μg/L,平均加标回收率89.9%~104.2%。该方法简便快速、专属性强、灵敏度高,可用于地道云南知竹酒的质量控制,为其开发利用提供理论依据。
