中心功能化二异羟肟酸及其钴(Ⅱ)配合物的合成

由对氯苯酚或对甲氧基苯酚出发，经多步反应合成了一系列含中心功能基的二异羟肟酸开链冠醚L^1H2～1L^6H2及其钴（Ⅱ）配合物CoL^1～CoL^6，其产率分别为48．3％～68．7％、73．2％～81．9％，结构经元素分析，IR、^1HNMR、MS和摩尔电导表征得以确认。     

新型磷酸酯酶模型配体的合成及其Zn(Ⅱ)配合物催化PNPP水解反应研究

以N,O,O′-三(对甲苯磺酰基)-双(2-羟乙基)胺为起始物,经季铵化、Hoffmann消去,得到了含两个咪唑功能基的仿生配体1,1再经水解、亲核取代反应,合成了含两个咪唑功能基的仿生配体2;化合物1、2的结构经IR、1HNMR和MS谱证实.催化活性研究表明:pH=7时,配体2的Zn(II)配合物催化PNPP水解的表观速率常数是PNPP自身水解的3.004×103倍,其水解能很好地遵从一级反应的动力学行为.     

5-羟色胺对大鼠肝细胞DNA合成增强作用的研究

目的：调查诱导或增强肝细胞ＤＮＡ合成因素。方法：；从成年大鼠肝脏分离肝细胞，在含＾３Ｈ－胸苷的培养液中培养，向含或不含表皮生长因子（ＥＧＦ）和胰岛素的肝细胞培养加入不同浓度的５－羟色胺（５－ＨＴ）以观察对ＤＮＡ合成的影响。在部分含５－ＨＴ的培养中加入５－ＨＴＨ２受体拮抗物酮舍林以检查Ｈ２受体的参与。ＤＮＡ合成以＾３Ｈ－胸苷掺入肝细胞ＤＮＡ的量用液体闪烁计数法测量。结果５－ＨＴ单独不能刺激ＤＮＡ合成     

取代嘧啶基硫脲类化合物的合成及生物活性

目的合成新的广谱、高效优良硫脲类杀菌剂。方法以氯甲酸酯与含不同取代基的嘧啶胺为原料,回流反应。结果合成了14个取代嘧啶基硫脲类化合物,其中12个化合物为首次报道的新化合物。结构组成经元素分析、IR及1H NMR确认,并测定了其对5种植物病菌的室内毒力作用。结论合成方法简便、易行,且大部分化合物具有良好的抑菌和杀菌活性。     

中心功能化二异羟肟酸及其钴(II)配合物的合成

由对氯苯酚或对甲氧基苯酚出发,经多步反应合成了一系列含中心功能基的二异羟肟酸开链冠醚L1H2~1L6H2及其钴(II)配合物CoL1~CoL6,其产率分别为48.3%~68.7%、73.2%~81.9%,结构经元素分析,IR、1HNMR、MS和摩尔电导表征得以确认。     

含磺酸基AA—AM共聚物的合成及阻垢性能

用溶液聚合法合成了丙烯酸－丙烯酰胺共聚物，经化学改性在聚合物分子链上引入磺酸基，制得含磺酸基的共聚物。用ＩＲ、１ Ｈ－ＮＭＲ和热分析方法对产物进行了表征和测定，并研究了其阻垢性能。结果表明：合成产物是一种性能优良的阻垢分散剂。     

N-[5-（1-对氯苯氧乙基）-1，3，4-噻二唑-2-基]-N′-芳酰基脲的合成及生物活性

设计合成了12个未见文献报道的含取代1，3，4-噻二唑的芳甲酰基脲类化合物，所有化合物的结构经IR，^1HNMR和元素分析确证．初步的生物活性测试结果表明，部分化合物具有较好的植物生长调节活性.     

L-色氨酸衍生物的合成

设计了以色氨酸为原料，经羧基酯化、氨基Boc保护、甲基化反应、脱保护基及酯的氨解等关键反应步骤，最终合成了五个色氨酸衍生物的简单合成路线。实验过程中得到的五个色氨酸衍生物分别是色氨酸甲酯、1-甲基色氨酸甲酯、色氨酸甲酰胺、色氨酸乙酰胺及色氨酸丙酰胺，五个色氨酸衍生物的化学结构经¹H-NMR谱确证。本研究中合成路线操作简单，收率较高，可用于作为吲哚生物碱的合成中间体原料，为寻找与开发新的活性药物提供参考。     

含药物端基PEG大单体的合成

以烯丙醇钠为引发剂引发环氧乙烷(EO)开环聚合再与含羧基药物烟酸、布洛芬、酮洛芬、萘普生反应得到含药物端基的PEG大单体(分别记为PEG-1、PEG-2、PEG-3、PEG-4),聚合物精制后用IR,1H-NMR和GPC进行了表征,结果表明合成的四种大单体分子量分布较窄,且分子量在一定范围内可控.     

双苯并咪唑氮杂多齿配体的阳离子识别性能

以二乙醇胺为起始物,合成了含两个苯并咪唑功能基的氮杂多齿仿生配体1,经IR、1HNMR和MS谱确证其结构.采用荧光光谱法测定了该仿生配体与13种金属离子的络合选择性.研究结果表明:仿生配体1对Cu2+、Fe3+、Na+、Zn2+均具有较高的选择性和荧光效应.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has