3，5-二硝基苯甲酰化的β-环糊精键合固定相的合成及性能评价

对 3,5 二硝基苯甲酰基衍生化的 β 环糊精键合固定相进行研究 ,采用均匀设计法对衍生化反应的工艺条件进行优化 .用红外光谱、元素分析及热重分析方法对键合相进行表征 ,结果表明此键合相性能稳定 ,适用于正相及反相液相色谱 .用 3,5 二硝基苯甲酰化的 β 环糊精键合相做薄层色谱的手性固定相 ,结合氯仿 丙酮 三乙胺和乙腈 φ =1%乙酸三乙胺 乙酸展开剂系统 ,7种手性药物得到完全分离 ,对映体间的相对比移值 α 为 1 19～ 2 0 3.     

新型β-环糊精衍生物在高效毛细管电泳分离扁桃酸中的应用

用β-环糊精、马来酸酐、间羧基苯磺酰氯合成了双-[6-氧-（3-间羧基苯磺酰基-丁二酸单酯-4）]-β-伊环糊精,并对合成的产物进行初步表征,以此β-环糊精衍生物作为手性添加剂用于毛细管电泳中分离扁桃酸,并与纯β-环糊精作为手性添加剂对比,结果表明：新合成的β-环糊精衍生物的拆分能力明显优于天然的纯β-环糊精。     

能分离手性化合物的固定相—环糊精

介绍了环糊精类化合物在色谱手性分离中的应用及其结构与特性.简单讲述了目前对环糊精能进行手性分离的原因的几种解释.分析了环糊精衍生物的种类及其在手性分离中的应用,特别是近年来,一些新的环糊精固定相和一些新方法的使用,使得环糊精的手性分离范围进一步拓宽.     

山茛菪碱和阿托品毛细管电泳手性拆分研究

为分离生物碱氢溴酸山莨菪碱和盐酸阿托品手性对映体,探讨手性分离机理,在区带毛细管电泳模式下,以环糊精和环糊精衍生物为手性选择试剂,考察手性试剂的种类、浓度及缓冲溶液pH值和其它电泳条件对手性拆分效果的影响．结果显示,分离电压为-15kV,检测波长为200nm,缓冲溶液组成为含5％高磺化环糊精（HS-α,β,γ-CD）的50mmol·L。磷酸盐-三乙胺溶液（pH2．5）为最佳实验条件．其中HS-γ-CD基线拆分了山莨菪碱中2个手性碳原子的2对对映体,HS-β-CD分离了2种物质并基线拆分了山莨菪碱和盐酸阿托品中1个手性碳原子的1对对映体．因此,对于氨类碱性手性药物,高磺化环糊精比未衍生化环糊精和羟丙基环糊精的拆分效果好,而酸性条件下,高磺化环糊精与叔胺类物质间手性拆分作用除了空间匹配、氢键作用外,还存在静电引力作用．     

环糊精类固定相在气相色谱中的应用

对环糊精类固定相以及近年来它们在气相色谱中的应用进行了评述，并展望了环糊精及其衍生物在气相色谱中的应用前景。环糊精类由于其特殊的结构和良好的拆分性能被用作气相色谱的固定相，通过近年来各类环糊精固定相在各方面的实际应用，说明环糊精类固定相在气相色谱手性分离研究中的潜力。引用文献42篇。     

环糊精在毛细管电泳手性分离中的应用

手性拆分相比于传统的色谱分离,分离分析难度非常大.本文介结合近些年了科学研究的发展趋势总结了环糊精作为手性选择试剂在毛细管电泳手性分离中的应用,介绍了毛细管电泳的基本原理,环糊精及其衍生物是一种最常用的手性选择试剂,通过与被分析药物结合形成包合物,瞬时失去手性而实现手性拆分,并通过相关公式讨论了其拆分机理,并探讨了环糊精手性分离未来的发展方向,该分析方法极其经典,具有实用性.     

丝氨酸衍生β-环糊精色谱柱的制备及色谱性能研究

以本实验室合成的新型丝氨酸衍生β-环糊精键合硅胶固定相为研究对象,采用高压匀浆法装填高效液相色谱柱,对装填工艺进行了优化,获得良好的色谱柱效和装柱重现性.考察了衍生β-CD色谱柱分离位置异构体及手性化合物,并与未衍生β-CD色谱柱进行比较,讨论分离作用机理.结果表明,丝氨酸衍生β-环糊精对位置异构体以及含有苯环且具有极性基团的手性化合物具有很好的分离选择性.     

新型N-(1-异喹啉基)-2-取代手性氨基醇类生物碱的合成及表征

以1-氯异喹啉为原料,通过硝化反应和溴化反应,分别合成其硝化和溴化产物.1-氯异喹啉及其衍生物以二异丙基乙基胺为溶剂,和D-苯甘氨醇反应,得到3种含手性氨基醇的异喹啉生物碱类化合物,并对各产物进行核磁、红外、质谱表征.     

用高效毛细管电泳法研究山莨菪碱的手性分离

目的研究山莨菪碱的手性分离．方法以β－环糊精及羧甲基－环糊精为手性选择剂,用高效毛细管电泳法对影响手性分离的主要因素进行研究．结果建立了拆分山莨菪碱对映异构体的最佳分离体系．结论羧甲基－环糊精可使山莨菪碱的４种对映异构体达到基线分离,与山莨菪碱结构相似的东莨菪碱和阿托品未达到手性分离．     

新型β-环糊精衍生物在高效毛细管电游分离桃酸中的应用

用β-环糊精、马来酸酐、间羧基苯磺酰氯合成了双-[6-氧-(3-间羧基苯磺酰基-丁二酸单酯-4)]-β-环糊精,并对合成的产物进行初步表征.以此β-环糊精衍生物作为手性添加剂用于毛细管电泳中分离扁桃酸,并与纯β-环糊精作为手性添加剂对比,结果表明: 新合成的β-环糊精衍生物的拆分能力明显优于天然的纯β-环糊精.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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