共查询到20条相似文献，搜索用时 968 毫秒
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用微晶纤维素和甲基苯甲酰氯反应合成了手性填料纤维素-三(4-甲基苯甲酸酯)(CTMB),并涂敷于氨丙基硅胶上,制备成手性固定相(CSP)。用高效液相色谱法,在正相条件下用此手性固定相,对农药禾草灵外消旋体进行了拆分,考察了流动相组成,醇效应,温度及色谱柱长度对拆分及保留的影响,并对其在该手性柱上保留机理进行了讨论。 相似文献
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《昭通师范高等专科学校学报》2015,(5):33-35
介绍了葡萄糖、纤维二塘、棉子糖、乳糖等用来作为高效液相色谱手性固定相的研究进展,研究发现这几种糖类作为高效液相色谱的手性固定相拆分效果比较好,比较有前途.同时展望了高效液相色谱手性固定相的发展前景. 相似文献
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建立了百湿芬肠溶胶囊中酮洛芬的手性拆分方法.利用PM-β-环糊精手性固定相拆分百湿芬肠溶胶囊中的酮洛芬对映异构体,对流动相的组成、pH值、流速等色谱条件进行优化.以甲醇-0.1％乙酸三乙胺=(40:60)做为流动相,缓冲溶液pH=4.00,色谱柱温为25℃,流动相流速为0.7 mL/min,在此条件下,百湿芬肠溶胶囊中的酮洛芬得到较好拆分. 相似文献
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分子印迹技术的应用研究进展 总被引：4，自引：0，他引：4
文章综述了分子印迹技术在药物及对映异构混合物的手性拆分,分子印迹聚合物作为色谱固定相用于分离和对药物以及环境有害物质的检测的研究进展.同时还介绍了分子印迹聚合物作为各种化学传感器的敏感元件,作为酶模拟催化剂的研究的现状. 相似文献
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采用高效液相色谱法,以β-环糊精为手性固定相拆分奥丁尼酮洛芬缓释胶囊中酮洛芬对映体,并对流动相中甲醇的含量、流动相的pH值、缓冲盐的浓度等色谱条件对拆分结果的影响进行了探讨.结果表明,在柱温为25℃,pH值为4.0,采用0.01 mol/L的磷酸二氢钾缓冲溶液,甲醇40%（V/V）作流动相时,奥丁尼酮洛芬缓释胶囊中的酮洛芬对映体能达到较好分离. 相似文献
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高效液相色谱手性固定相的最新研究进展 总被引：1，自引：0，他引：1
赵峰 《昭通师范高等专科学校学报》2008,30(5)
综述高效液相色谱手性固定相的发展过程,介绍手性冠醚类、Pirkle型、配体交换型、大环抗生素、多糖类、环糊精类、分子印迹类、蛋白质类、手性聚合物类手性固定相在2006～2007年的发展过程,展望高效液相色谱手性固定相的发展前景. 相似文献
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对国内外毛细管电泳在手性物质拆分领域的研究与应用进行了综述,特别对近五年来以各种环糊精衍生物作为手性分子识别试剂拆分手性物质方面做了归纳总结,进一步对以环糊精衍生物作为手性选择试剂在毛细管电泳手性药物拆分中的应用研究做了简单展望. 相似文献
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高效液相色谱法拆分酮咯酸氨丁三醇盐对映体 总被引：2，自引：0，他引：2
利用PM-β-环湖精手性固定相高效液相色谱法直接拆分酮咯酸氨丁三醇盐对映体．本试验研究了流动相中甲醇的含量、流动相的pH值、缓冲盐的浓度等色谱条件对拆分结果的影响．结果表明，在柱温为25℃，pH值为4．0，采用0．01mol／L的磷酸二氢钾缓冲溶液（含35％甲醇（V／V））作流动相时，酮咯酸盐对映体能达到基线分离． 相似文献
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邱崇丙 《唐山师范学院学报》2014,(1):21-23
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。 相似文献
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Rachel Zupek 《海外英语》2007,(11):40-41
我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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YANGShiguo 《重庆大学学报(英文版)》2004,3(1):86-88
The problem on the geometrc inequalities involving an n-dimensional simplex and its inscribed simplex is studied. Aninequality is established, which reveals that the difference between the squared circumradius of the n-dimensional simplex andthe squared distance between its circumcenter and barycenter times the squared circumradius of its inscribed simplex is not lessthan the 2(n-1)th power of n times its squared inradius, and is equal to when the simplex is regular and its inscribed siplex is atangent point one. Deduction from this inequality reaches a generalization of n-dimensional Euler inequality indicating that thecircumradius of the simplex is not less than the n-fold inradius. Another inequality is derived to present the relationship betweenthe circumradius of the n-dimensional simplex and the circumradius and inradius of its pedal simplex. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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GUO Bao-feng Xiao Da-wei 《重庆大学学报(英文版)》2005,4(3):129-133
Using virtual reality for interactive design gives a designer an intuitive vision of a design and allows the designer to achieve a viable, optimal solution in a timely manner. The article discusses the process of making the Virtual Reality System of the Humble Administrator＇s Garden. Translating building data to the Virtual Reality Modeling Language （VRML） is by far unsatisfactory. This creates a challenge for computer designers to do optimization to meet requirements. Five different approaches to optimize models have been presented in this paper. The other methods are to optimize VRML and to reduce the file size. This is done by keeping polygon counts to a minimum and by applying such techniques as object culling and level-ofdetail switching. 相似文献
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The awareness of individualism can be traced back to the period of American Revolution when the Declaration of Independence was produced.It expressed basic beliefs concerning freedom,equality,democracy,privacy and the relationship between people and government,which were exactly what the philosophy of individualism mostly dealt with at that time.This paper is to exploit the essence of individualism by analyzing the Declaration .The analysis enables us to reconsider its significance to the issue of America human rights and foreign policies. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献