共查询到20条相似文献，搜索用时 78 毫秒
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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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丁满花 《湖南科技学院学报》2002,23(2):73-76
通过对近年来β-CD及其衍生物作为色谱固定相在各类色谱分析,尤其在色谱手性分离中的应用及进展的评述,文章从环糊精(cyclodextrin,简称CD)的结构特征出发,通过对不同的CD衍生物对各类化合物的分离特征的探讨,综述了β-CD及其衍生物色谱固定相的分离机理.这将对人们有目的有选择地合成新的环糊精类(CDs)固定相以进一步提高其选择性并拓宽其应用范围,提供了理论依据,具有一定的理论价值. 相似文献
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β—CD及其衍生物色谱固定相的分离机理 总被引：1，自引：0，他引：1
通过对近年来β—CD及其衍生物作为色谱固定相在各类色谱分析,尤其在色谱手性分离中的应用及进展的评述,文章从环糊精(cyclodextrin,简称CD)的结构特征出发,通过对不同的CD衍生物对各类化合物的分离特征的探讨,综述了β—CD及其衍生物色谱固定相的分离机理.这将对人们有目的有选择地合成新的环糊精类(CDS)固定相以进一步提高其选择性并拓宽其应用范围,提供了理论依据,具有一定的理论价值.* 相似文献
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手性药物对映体分离理论与应用技术在药物及生命科学研究领域中占有极为重要的位置,是当前制药工业和生物技术发展的尖端研究课题。模拟移动床色谱已被国际上公认为制备规模拆分手性药物的最有效手段。介绍了模拟移动床色谱数学模型和数值分析方法的最新进展。 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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综述了手性化合物的起源、发展以及在医药、农药和生物功能材料等方面的重要作用;不对称催化作为合成手性化合物最有效、最有应用价值的手段,从而应类型和工业化应用两个方面加以阐述。 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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《昭通师范高等专科学校学报》2015,(5):22-24
应用预先合成的[Fe3O(OOCCH3)6]作为基础原料合成了几种金属卟啉介孔金属-有机骨架材料,这类材料定义为PCN-600(M)(M=Cu,Fe,Co),具有介孔孔径尺寸,并且具有较大的孔容量.这几种材料中,PCN-600(Fe)在氧化反应中具有优秀的催化效果. 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