活性基团的空间分布对混合磷酸锆-钯催化剂羰化反应催化活性的影响

用二苯基氯化膦对三乙烯四胺乙基膦酸－磷酸氢锆载体Ｚｒ（ＨＰＯ４）２－２ｘ「Ｏ３ＰＣＨ２ＣＨ２）３－ＮＨ２」ｘＨ２Ｏ（简称ＺＰ－ＴＥＴＡＥＰＡ）表面进行二苯基膦化,制得了二苯基膦化的载体ＺＰ－ＴＥＴＡＥＰＡ－ＤＰＰ和相应的负载络合钯催化剂ＺＰ－ＴＥＴＡＥＰＡ－ＤＰＰ－Ｐｄ,用ＩＲ,ＴＧ,ＤＴＡ及元素分析对它们进行了表征,着重研究了ｘ值所反映的活性基团在载体表面的空间分布对ＺＰ－ＴＥＴＡＥＰＡ－ＤＰＰ     

杂环偶氮苯甲酸类化合物作为分析试剂的研究──(IV)2-(4 5-二甲基噻唑偶氮)-5-二甲氨基苯甲酸与钯的显色反应

研究了Ｐｄ－ＤＭＴＡＭＢ－ＣＴＭＡＢ体系的显色条件及性质。在ｐＨ３～６时，形成稳定的配合物。λｍａｘ为６９５ｎｍ，对比度为１７５ｎｍ；ε＝６．６５×１０４，该显色体系不为ＥＤＴＡ所破坏，而其他金属离子的配合物会被ＥＤＴＡ所破坏而褪色，方法的选择性好。     

菲的无保护流体室温磷光性质研究

在无任何保护性介质存在下以Ｎａ２ＳＯ３ 为除氧剂, ＫＩ为重原子微扰剂, 菲即能产生强而稳定的室温磷光（ＲＴＰ） 发射, λｅｘ／λｅｍ ＝ ２８３ｎｍ／４８２ , ５０４ｎｍ ． 不同有机溶剂存在对其ＲＴＰ性质具有不同影响． １ ％ 乙腈存在时, 菲浓度在０－８ ～６－０ 和６－０ ～４０μｍｏｌ／Ｌ范围内分别与其ＮＰ－ ＲＴＰ 强度呈良好线性关系, 检出限为２－６ｎｍｏｌ／Ｌ．     

纸基质室温磷光法测定痕量腺嘌呤

以滤纸为基质, 选用醋酸铊作重原子微扰剂, 研究各种适宜的实验条件, 建立了纸基质室温磷光法（ＰＳ－ ＲＴＰ） 测定痕量腺嘌呤的新方法． 其激发波长为２８４ｎｍ , 发射波长为４２０ｎｍ ; 腺嘌呤在１０－８ ～５４０－５ｎｇ 范围内与ＲＴＰ强度呈良好线性关系; 检出限为４－５ｎｇ／ 斑．     

荞麦花粉肽及其类似物的合成,结合和免疫活性研究

用Ｍｅｒｒｉｆｉｅｌｄ固相法合成了荞麦花粉肽ＢＰＰ－１及其类似物ＢＰＰ－１－３,ＢＰＰ－１－４和ＢＰＰ－２。通过ＦＴ－ＩＲ和ＣＤ谱初步讨论了ＢＰＰ－１的二级结构,结果表明其水溶液构象属于无规卷曲和β－折叠,但在三氟乙醇中,ＣＤ谱在２０６ｎｍ和２２２ｎｍ附近呈双负峰形,分子形成了α－螺旋构象。研究了ＢＰＰ－１,ＢＰＰ－１－３和ＢＰＰ－２对动物和人淋巴细胞的增殖应答功能和抑制释放ｓＩＬ－２Ｒ的作用,结     

PPTA／尼龙—1010分子复合材料热行为与力学性能的研究

采用共沉淀法制得了ＰＰＴＡ／尼龙－１０１０分子复合材料,并对其熔融特性、拉伸性能作了测试。结果发现由于ＰＰＴＡ的加入,可以提高尼龙－１０１０熔点和结晶温度,提高尼龙－１０１０的拉伸强度和模量,并对ＰＰＴＡ增强尼龙－１０１０的机理进行了初探。     

非对称水溶性卟啉与钯(Ⅱ)显色反应的光度法研究

研究了非对称性５,１０,１５－三（４－甲基－３－磺基苯）－２０－［４－（５－氟尿嘧啶）－３－磺基苯］卟啉（ＭＦｕＳＰＰ）测钯的显色条件．在表面活性剂十二烷基磺酸钠存在下,ｐＨ４．５～６．０的弱酸性ＨＡｃ－ＮａＡｃ缓冲介质中,用抗坏血酸催化,Ｐｄ（Ⅱ）与ＭＦｕＳＰＰ形成１１配合物,最大吸收波长４１５ｎｍ,摩尔吸光系数ε＝１．８×１０５Ｌｍｏｌ－１ｃｍ－１,线性范围０～２．０μｇ／１０ｍＬ．该显色剂保持了对称性卟啉灵敏度高的优点,选择性和反应速度有明显改善．应用于混合样品和钯催化剂样品中钯的测定,结果满意     

有机溶剂对芴和苊无保护流体室温磷光性质的影响

在无任何保护性介质存在下, 仅以Ｎａ２ＳＯ３ 作化学除氧剂, ＫＩ为重原子微扰剂, 芴、苊即能产生强而稳定的流体室温磷光发射． 最大激发和发射波长分别为λｅｘ／λｅｍ ＝ ２８４ｎｍ／４７１ｎｍ 、２８５ｎｍ／４９３ , ５１２ｎｍ ． 不同有机溶剂及其用量对其ＲＴＰ发射性质有不同影响． １ ％ 乙腈存在时, 芴浓度在０－８０ ～８－０μｍｏｌ／Ｌ和８－０ ～４０μｍｏｌ／Ｌ 范围; 苊浓度在０－８０ ～２－８μｍｏｌ／Ｌ 和２－８ ～４－０μｍｏｌ／Ｌ范围, 与其ＲＴＰ强度呈良好的线性关系, 检出限分别为３２ 、３１ｎｍｏｌ／Ｌ．     

粘度法测试PPTA／尼龙—1010分子复合材料组合间相容性

采用粘度法测得了ＰＰＴＡ／尼龙－１０１分子复合体系在硫酸溶液中的粘度数据，作出了ηｓｐ－ｃ、「η」－Ｘｐ及α－Ｘｐ的关系曲线，显示ηｓｐ－ｃ与「η」－Ｘｐ关系曲线都呈直线，α－Ｘｐ的关系曲线中，α〉０，表明ＰＰＴＡ和尼龙－１０１０在复合体系中是相容的，且在ＰＰＴＡ含量为１０％左右，α值最大，表明其相容性最好。并从分子链结构方面对组间相容性进行了探讨。     

非对称水溶性卟啉与钯（II）显色反应的光度法研究

研究了非对称性５，１０，１５－三（４－甲基－３－磺基苯）－２０－［４－（５－氟尿嘧啶）－３－磺基苯］卟啉（ＭＦｕＳＰＰ）测钯的显色条件，在表面活性剂十二烷基磺酸钠存在下，ｐＨ４．５￣６．０的弱酸性ＨＡｃ￣ＮａＡｃ缓冲介质中，用抗坏血酸催化，Ｐｄ（Ⅱ）与ＭＦｕＳＰＰ形成１：１配合物，最大吸收波长４１５ｎｍ，摩尔吸光系数ε＝１．８×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，线性范围０￣２．０μｇ／１０ｍｌ     

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