毛细管

This dissertation mainly focuses on developing the study of new enantioseparation methods and on-line preconcentration methods by capillary electrophoresis.

中文摘要：本论文主要围绕着构筑新的毛细管电泳手性拆分方法和在线富集方法开展研究。

Besides off-column preconcentration, on-column preconcentration method has been attracting a lot of researchers because of its simplicity.

采用同样的装置，本论文首次建立了毛细管电泳分析血浆中的维甲酸异构体的方法，灵敏度提高100倍以上。

A new predischarge trigger generator, that is more simple and stable than the former one, has been designed and fabricated using the car ignition loop DQ128. A Rogowski coil, that instead of the former device can much more accurately measures the current flowing through capillary, has been made and calibrated.

自制了罗可夫斯基线圈，并对其进行了标定，代替原先使用的回流器测量放电电流，解决了无法准确测量流过毛细管电流的问题，为实验分析提供了更准确的依据。

A method based on capillary electrophoresis with electrochemical detection has been developed for the separation and determination of epicatechin, kaempferol, chlorogenic acid, 4-hydroxybenzoic acid, quercetin and protocatechuic acid in hawthorn for the first time.

首次采用毛细管电泳—电化学检测法同时测定山楂中的6种活性成分：表儿茶素，山奈酚，氯原酸，4-羟基苯甲酸，槲皮素和原儿茶酸的含量。

In chapter 6, a simple and rapid method for the simultaneous determination of three water-soluble compounds,β(3, 4-dihydroxyphenyl) lactic acid, protocatechuic acid and protocatechuic aldehyde, in radix Salviae Miltiorrhiza injection was firstly developed.

在第六章，我们首次建立了一种简单的、快速的同时测定丹参注射液中三种水溶性化合物丹参素、原儿茶酚和原儿茶醛的毛细管区带电泳法。

The effect of gamma irradiation on the rheological properties of HDPE and its blend with STC was studied through high pressure capillary rheometer and advanced rheometric system Rheometrics parallel-plate rheometer.

采用高压毛细管流变仪及平行板流变仪研究了γ射线辐照高密度聚乙烯及其与绢英粉共混体系的流变性能。

The melt elasticity of PP filled with CaCO3 of nano-particles or micron particles or their assembling was studied by capillary rheometry measuring the values of first normal stress difference (N1) and extrudate swell of the systems.

利用高压毛细管流变仪测量的第一法向应力差(N1)和挤出胀大比研究了纳米CaCO3和微米CaCO3分别填充和同时填充聚丙烯体系的熔体弹性。

Finally, simulation software was developed with Visual C++ and Delphi for 2D molding analysis of MIM, which affords facilities for the quality forecast of 2D thin wall parts and optimal design of mold and process parameters. In the research of molding performance of MIM feedstock, for the shortcoming of capillary rheometry, it was propounded that using spiral mold test molding performance of feedstock, and a set of spiral mold was creatively designed with quickly exchange gates and closed mold cavity. With the spiral mold, an orthogonal experiment was made on getting regress equation of flow length L〓 of the heavy alloy feedstock. Then the rule of L〓 varying with Q〓, P〓, and ΔT〓 was discovered. Q〓 ranks first in the influence on process parameters of molding performance, P〓 and Δ T〓 second. Therefore the injection rate Q〓 should be controlled primarily to improve the flow performance of feedstock.

在MIM喂料注射成形性能研究方面，针对毛细管流变仪测试法衡量流动性能的不足，提出使用螺旋线模具测试喂料熔体的注射成形性能，创造性地设计了一套可快换浇口，模腔封闭的螺旋测试模，并在螺旋测试模上采用正交实验设计，得出了高密度重合金喂料流动长度L〓的回归公式，揭示了L〓随Q〓、P〓、△T〓和S〓的变化规律，并得出工艺参数对成形性能影响的强度顺序为Q〓最大，P〓与△T〓其次，因而改善喂料流动性能应优先控制注射速率Q〓。

Additionally, 75 volatile chemical constituents have been identified from the petroleum ether extracted part by capillary GC-MS, and the relative percentages of them are determined by GC method. The result showed that the volatile constituents of Musella lasiocarpa mainly includes advanced alkane, aliphatic acid and ester, aldehyde, ketone, aromatic and its heterocyclic compounds. With the compounds that have been isolated and identified from Musella lasiocarpa, the biogenensis pathway of new compound MT-3 is approached. Furthermore, the bacteriostasis of the 6 compounds to Escherichia coil, Pseudomonas aerusinosa, Bacillus megaterium, Sarcina lutea and Bacillus subtilic are determined by flat dilution method.

此外，从其石油醚萃取部分用毛细管色谱法分析鉴定出75种挥发性化学成分，并测定了各组分的相对百分含量，结果表明，地涌金莲挥发性化学成分以高级烷烃、高级脂肪酸酯及醛、酮、芳香和芳香杂环化合物为主；根据从地涌金莲中鉴出和分离得到的化合物，探讨了新结构化合物MT-3的生源代谢途径；采用平板稀释法测定了地涌金莲中六种化学成分对大肠杆菌、绿脓杆菌、巨大芽孢杆菌、藤黄八叠球菌和枯草芽孢杆菌的抑菌作用。

In recent years, the popularity for the use of capillary electrophoresis in the pharmaceutical field has been accelarated by its simplicity, high efficiency and selectivity, large separatory capacity, and its relatively lower operational cost.

近年来，毛细管电泳因其具有较高的分离柱效、选择性和分离能力以及快速、进样量小、操作简便并易于实现自动化等特点在药物分析方面倍受青睐。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。