云母钛珠光颜料的液相合成技术 Ⅰ．云母钛强制水解包膜工艺及机理

在文题研究中，对反应体系的ｐＨ值、反应物浓度、反应温度对合成颜料的色相和光泽等外观表现及微观结构的影响规律作了一定的工作。结果表明，较优的工艺条件：ｐＨ为０．５～１．２，铁盐浓度ｕ，为０．０３～０．０７，温度为７５～９０℃。通过ＸＲＤ研究表明，包覆在云母表面的水合二氧化钛膜层的粒子呈不明显的锐钛相微晶结构。制得的不同粒度、不同色相的云母钛具有较强的的珠光效果及明显的色调。     

乙烯在Ziegeler—Natte催化剂上配位活化的量子化学模拟

采用ＣＮＤＯ／２法计算了乙炮在Ｚｉｅｇｌｅｒ－Ｎａｔｔａ催化剂主体ＴｉＣｌｎ（ｎ＝４，３，２）上的配位活化机理。计算结果表明，三阶钛（Ｔｉ＾３＋）较四价钛（Ｔｉ＾４＋）和二阶钛（Ｔｉ＾２＋）更有利于乙烯的配位活化通过分子轨道能级、轨道特征以及Ｍｕｌｌｉｋｅｎ约化重叠集居等数据，分析了为何Ｔｉ＾３＋较Ｔｉ＾４＋和Ｔｉ＾２＋更有 利于乙烯配位活化这一实验现象。     

pH值对Bi_4Ti_3O_（12）溶胶水解特性的影响

报导了前驱体溶液的ｐＨ值对Ｂｉ－Ｔｉ溶液的水解特性的影响，并探讨了乙醇胺的催化作用机理。研究表明，乙醇胺可调节溶液的ｐＨ值，其机理是与ＨＡｃ反应，并与Ｂｉ＋离子生成稳定的络合物．前驱体溶液的ｐＨ值是决定溶胶、凝胶质量的主要因素．ｐＨ值较小时，溶液容易产生沉淀；ｐＨ值较大时，溶液中有大量的浑浊物；只有ｐＨ值在２．５～４之间的溶液才能形成均匀稳定的溶胶和凝胶     

嗜碱细菌NTT33碱性β—甘露聚糖酶的纯化与性质研究

根据了嗜碱芽孢杆菌ＮＴＴ３３产生的碱性β－甘露聚糖酶经纯化后,在ＰＡＧＥ电泳上呈现一条蛋白带,分子量为３．８９×１０＾７,等电点为３．０￣４．０,酶反应最适ｐＨ为９．０￣１０．０,最适作用温度为８０℃,稳定ｐＨ为６．０￣９．０,稳定温度为６０℃以下,金属离子Ｃｕ＾２＋,Ｍｇ＾２＋,Ａｌ＾３＋,Ｃｏ＾２＋对该酶有一定的激活作用,而Ａｇ＾＋,Ｈｇ＾２＋,Ｍｎ＾２＋对该酶有明显抑制作用,经薄层层析鉴定,     

云母钛珠光颜料的液相合成技术：Ⅰ.云母钛强制水解包膜工…

在文题研究中，对反应体系的ｐＨ值，反应物浓度，反应温度对合成颜料的色相和光泽等外观表现及微观结构的影响规律作了一定的工作。结果表明，较优的工艺条件：ｐＨ为０．５１．２，钛盐浓度ω为０．０３－０．０７，温度为７５－９０℃。通过ＸＲＤ研究表明，包覆在２母表面的水合二氧经钛膜层的粒子呈不明显的锐钛相微晶结构。     

高纯超细BaTiO3的合成及其应用性能

在分析Ｂａ＾２＋，ＢｉＯ２＋与草酸混合体系热力学平衡的基础上，提出了将Ｔｉｏ＾２＋与草酸混合，在一定的ｐＨ值时生成钛配阴离子，再与ＢａＣｌ２昨分解反应、直接沉淀出ＢａＴｉＯ３的前驱体－草酸氧钛钡，最终经煅烧得ＢａＴｉＯ３粉体的合成新工艺。     

pH值对Bi4TiO12溶胶水解特性的影响

报道了前驱体溶液的ｐＨ值对Ｂｉ－Ｔｉ溶液的水解特性的影响，并探讨了乙醇胺的催化作用机理。研究表明，乙醇胺可调节溶液的ＰＨ值，其机理及ＨＡＣ反应，并与Ｂｉ＾＋离子生成稳定的络合物。     

稀土固体超强酸SO^2—4／TiO2／La^3＋催化合成苯乙丁酯

研究了以固体超强酸ＳＯ＾２－４／ＴｉＯ２／Ｌａ＾２＋为催化剂，苯乙酸和正丁醇为原料合成苯乙酸丁酯，并考察了影响反应的因素。结果表明，醇酯比为２．０：１，催化剂用量为２％，本为１５ｍＬ，反应时间为３．０ｈ是最适宜的反应条件，酯化率达９８．５％。     

乙烯在Ziegler-Natta催化剂上配位活化的量子化学模拟

采用ＣＮＤＯ／２法计算了乙烯在Ｚｉｅｇｌｅｒ－Ｎａｔａ催化剂主体ＴｉＣｌｎ（ｎ＝４，３，２）上的配位活化机理．计算结果表明，三价钛（Ｔｉ３＋）较四价钛（Ｔｉ４＋）和二价钛（Ｔｉ２＋）更有利于乙烯的配位活化．通过分子轨道能级、轨道特征以及Ｍｕｌｉｋｅｎ约化重叠集居等数据，分析了为何Ｔｉ３＋较Ｔｉ４＋和Ｔｉ２＋更有利于乙烯配位活化这一实验现象．     

电极材料,温度等因素对Ce^3＋阳极氧化过程的影响

用气体电量计法分解极化曲线研究了温度对ＰｂＯ２，Ｐｔ电极上Ｃｅ＾４＋阳极形成过程的影响，得到了两电极上Ｃｅ＾４＋和Ｏ２的表现活化能，在Ｐｔ电极上Ｃｅ＾４＋的活化能在于Ｏ２的活化能；温度升高时使Ｃｅ＾４＋的电流效率升高，但ＰｂＯ２电极上Ｃｅ＾４＋的活化能小于Ｏ２的活化能，温度升高时Ｃｅ＾４＋的是流效率降低，研究了不同Ｃｅ＾３＋浓度对Ｔｉ／Ｐｔ基ＭｎＯ２电极上Ｃｅ＾４＋阳极形成过程的影响，得到出该反应     

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     

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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