Ce(SO4)2-罗丹明6G-左羟丙哌嗪化学发光体系的研究

在硝酸介质中,罗丹明6G可大大增敏Ce(SO4)2氧化左羟丙哌嗪产生的化学发光,据此采用流动注射技术,建立了Ce(IV)-罗丹明6G-左羟丙哌嗪化学发光体系测定左羟丙哌嗪的化学发光新方法。在优化的实验条件下,该法测定左羟丙哌嗪的检出限为4.9×10-7g/L,线性范围为0.8~80mL,对5ug/mL左羟丙哌嗪进行了11次平行测定,其RSD为3.8%。     

KMnO_4-HCHO-EDTA流动注射化学发光法测定左羟丙哌嗪

在酸性介质中,左羟丙哌嗪在高锰酸钾-甲醛体系中产生化学发光,而乙二胺四乙酸的存在可显著增强其发光强度,据此建立了一种简单、快速测定左羟丙哌嗪的化学发光新方法.在实验的优化条件下,化学发光强度与左羟丙哌嗪的浓度在1.0×10-8～5.0×10-6g/mL范围内呈现出良好的线性关系.其检测限(3σ)为3.75×10-9g/mL,对8.0×10-7g/mL的左羟丙哌嗪溶液进行11次平行测定,相对标准偏差为3.03%.将本法应用于合成样品中左羟丙哌嗪的测定,结果满意.     

流动注射化学发光法测定左羟丙哌嗪

在硫酸介质中,高锰酸钾氧化左羟丙哌嗪产生化学发光,甲醛可大大增敏上述化学发光,据此建立了测定左羟丙哌嗪的流动注射化学发光分析新方法.在优化的实验条件下,该法测定左羟丙哌嗪的线性范围为0.01~4.0μg/mL,检出限(3σ)为0.94 ng/mL,对1.0μg/mL左羟丙哌嗪进行11次平行测定,其相对标准偏差为1.06%.将本法用于合成样品中左羟丙哌嗪的测定获得满意结果.     

左羟丙哌嗪的光谱分析

左羟丙哌嗪为一外周性镇咳药物，在测得其旋光性后，对其进行了紫外光谱、红外光谱、氢核磁共振谱、磁核磁共振谱及质谱的测定，对左羟丙哌嗪的四大光谱进行了解析，以确定其分子结构。     

新型镇咳药左旋羟丙哌嗪的合成研究

通过各种文献资料的分析,选择用苯胺与二乙醇胺在浓盐酸催化下缩合制备苯基哌嗪,用苯基哌嗪和3-氯-1,2-丙二醇作用合成消旋羟丙哌嗪,再用拆分方法制备左旋羟丙哌嗪,此路线具有原料易得,操作简单,成本低的特点。     

左羟丙哌嗪的合成和晶体结构

通过苯胺与二乙醇胺在浓盐酸催化作用下缩合制备苯基哌嗪,用苯基哌嗪和3-氯-1,2-丙二醇作用合成消旋羟丙哌嗪,再用拆分方法制备左旋羟丙哌嗪,该化合物呈单斜晶系,空间群为P21.晶胞参数a=0.8410(2)nm,b=0.7255(2)nm,c=2.103(4)nm,β=92.210(10)°,V=1.2825(5)nm3,Z=4,Dc=1.089Mg/m3,R=0.0361,wR=0.0740.     

羟端基超支化聚胺酯的合成与表征

通过Michael加成反应制得N,N-二异羟丙基-3-胺基丙酸甲酯单体,以红外、核磁共振和质谱对所合成的单体的分子结构进行了表征.单体再与核物质1,1,1-三羟甲基丙烷分别采用有核一步法和有核准一步法发生缩聚反应,合成一种新型羟端基的超支化聚胺酯.并对聚合物的分子量分布、热性能、溶解特性及粘度特征进行了研究.     

顺式-2，6-二甲基哌嗪合成工艺研究

综述了2,6-二甲基哌嗪的合成方法,并对顺式-2,6-二甲基哌嗪的合成工艺进行了研究,提出了以α-溴丙酰溴为原料的合成工艺路线,最终产物熔点是110-111℃,NMR谱图吸收峰与结构式一致。产品最终收率为50.7%。     

盐酸西替利嗪的改进合成

对氯卞氯和苯经付克反应，光溴化，得到4-氯二苯基溴甲烷，然后经与羟乙基哌嗪缩合、与氯乙酸钠反应、加盐酸成盐、精制得西替利嗪盐酸盐，总收率为29%。     

新型延缓交联体系

用氧氯化锆和柠檬酸钠反应制得一种新型的延缓交联的交联剂──柠檬酸锆。用正交设计和粘度法得到了制备柠檬酸锆的最佳条件，即：氢氯化锆与柠檬酸钠的摩尔比为２：１．ｐＨ值为７．试验结果表明，柠檬酸锆可以延缓锆对聚丙烯酰胺、瓜尔胶、羟甲基瓜尔胶、羟乙基瓜尔胶、羟丙基瓜尔胶的交联速度。交联速度随聚合物浓度、柠檬酸锆对聚合物的质量比、温度、水的矿化度的增加而增加．柠檬酸锆对ＰＡＭ通过羧基交联，对瓜尔胶通过羟基交联。     

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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