超高速磨削可大幅度提高磨削效率，减少砂轮磨损，提高零件加工质量，是一项具有强大生命力和广阔前景的技术。轴承技术是超高速大功率磨削主轴系统的关键技术。本文介绍了一种适于超高速大功率工况的新型液体动静压混合轴承 (简称 SS－...超高速磨削可大幅度提高磨削效率，减少砂轮磨损，提高零件加工质量，是一项具有强大生命力和广阔前景的技术。轴承技术是超高速大功率磨削主轴系统的关键技术。本文介绍了一种适于超高速大功率工况的新型液体动静压混合轴承 (简称 SS－ HP HJB)，详细介绍了 SS－ HP HJB的结构形式、理论分析及数值计算。实验结果与理论分析结果很好地吻合，二者共同表明， SS－ HP HJB具有良好的稳态性能。展开更多
[Objective] This study was conducted to develop a method for rapidly separating macranthoidin B and dipsacoside B from Flos Lonicerae. [Method] HP-20 and HP-SS macroporous resin were applied to separate and purify mac...[Objective] This study was conducted to develop a method for rapidly separating macranthoidin B and dipsacoside B from Flos Lonicerae. [Method] HP-20 and HP-SS macroporous resin were applied to separate and purify macranthoidin B and dipsacoside B from Flos Lonicerae. The extract of Flos Lonicerae was first loaded onto an HP-20 column to enrich saponins, which were then separated by an HP-SS macroporous resin column to get pure macranthoidin B and dipsacoside B.[Result] The optimal HP-20 purification conditions included： a concentration of sample liquid at 4.8 mg/ml, a sample volume of 2 BV, an adsorption flow rate at 1.5BV/h, an ethanol concentration for desorption at 60%, a desorption volume of 3 BV,and a desorption flow rate at 1.5 BV/h. Total saponins were then separated by an HP-SS macroporous resin column which was eluted sequentially by water, 20%ethanol, 30% ethanol, 40% ethanol and 50% ethanol. Two purified compounds were obtained in fractions eluted by 40% ethanol and 50% ethanol, respectively. The two compounds were identified as macranthoidin B and dipsacoside B by13 C and1H nuclear magnetic resonance spectroscopy. [Conclusion] The combination of HP-20 and HP-SS macroporous resin could efficiently separate macranthoidin B and dipsacoside B from Flos Lonicerae.展开更多
文摘超高速磨削可大幅度提高磨削效率，减少砂轮磨损，提高零件加工质量，是一项具有强大生命力和广阔前景的技术。轴承技术是超高速大功率磨削主轴系统的关键技术。本文介绍了一种适于超高速大功率工况的新型液体动静压混合轴承 (简称 SS－ HP HJB)，详细介绍了 SS－ HP HJB的结构形式、理论分析及数值计算。实验结果与理论分析结果很好地吻合，二者共同表明， SS－ HP HJB具有良好的稳态性能。
基金Supported by Guangxi Scientific Research and Technological Development Planning Project(20130403-2)Technology Research and Development Program of Guangxi Province(GKH15104001-15)+1 种基金Special Fund for Bagui Scholars of the Guangxi Zhuang Autonomous RegionDirector Fund Project of Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization(ZRJJ2016-4)~~
文摘[Objective] This study was conducted to develop a method for rapidly separating macranthoidin B and dipsacoside B from Flos Lonicerae. [Method] HP-20 and HP-SS macroporous resin were applied to separate and purify macranthoidin B and dipsacoside B from Flos Lonicerae. The extract of Flos Lonicerae was first loaded onto an HP-20 column to enrich saponins, which were then separated by an HP-SS macroporous resin column to get pure macranthoidin B and dipsacoside B.[Result] The optimal HP-20 purification conditions included： a concentration of sample liquid at 4.8 mg/ml, a sample volume of 2 BV, an adsorption flow rate at 1.5BV/h, an ethanol concentration for desorption at 60%, a desorption volume of 3 BV,and a desorption flow rate at 1.5 BV/h. Total saponins were then separated by an HP-SS macroporous resin column which was eluted sequentially by water, 20%ethanol, 30% ethanol, 40% ethanol and 50% ethanol. Two purified compounds were obtained in fractions eluted by 40% ethanol and 50% ethanol, respectively. The two compounds were identified as macranthoidin B and dipsacoside B by13 C and1H nuclear magnetic resonance spectroscopy. [Conclusion] The combination of HP-20 and HP-SS macroporous resin could efficiently separate macranthoidin B and dipsacoside B from Flos Lonicerae.
