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。     

液相化学沉积法制备云母钛珠光颜料

将液相化学沉积法合成云母钛珠光颜料剖析为Ｔｉ＾４＋的水解和水解产物在云母表面沉积两个过程。从Ｔｉ＾４＋的水解机理和结晶动力学两方面分析了影响云母钛合成的主要因素：反应体系的ｐＨ值，温度和Ｔｉ＾４＋浓度。对各主要因素进行了实验考察，得到了合成云母钛的较佳工艺条件，即反应体系的ｐＨ值为２．０￣２．２，反应温度为７５￣８０℃，Ｔｉ＾４＋浓度为３．１ｃ ｇ ／ｌ。同时对ＴｉＯ２在云母表面的沉积机理进行了探     

二步法云母微晶片的纳米二氧化钛包覆研究

提出了二步法云母微晶片的纳米二氧化钛包覆技术,使二氧化钛的成核与生长过程分开进行。所得产物包膜均匀、致密,颗粒达纳米级。对包覆技术条件进行了研究,反应体系的最佳条件为ｐＨ值取２．０～２．５,二步钛盐加料比Ｖ１／Ｖ２≥０．１１,第一步钛盐加料速度低于０．３ｍｌ／ｍｉｎ,第二步钛盐加料速度低于０．６ｍｌ／ｍｉｎ。     

着绿色云母钛珠光颜料的合成研究

本文对三氧化二铬包覆云母钛制得着绿色珠光颜料的制备方法进行了探讨,并对铬包覆量、反应温度,煅烧温度及方式等影响产品性能的因素进行了讨论.     

荧光猝灭法测定硅酸盐矿物中的微量钛

用荧光猝灭法研究了二溴羟基苯基荧光酮（Ｔｉ（Ⅳ）－ＤＢＨ－ＰＦ－Ｔｒｉｔｏｎｘ－１００）体系的测定方法与条件。在ｐＨ为１．５～２．１的Ｈ２ＳＯ４介质中Ｔｒｉｔｏｎｘ－１００存在下，Ｔｉ（Ⅳ）与ＤＢＨ－ＰＦ形成１∶２的桔红色络合物。钛浓度在０．０１～４μｇ／２５ｍＬ范围内ΔＦ与钛浓度呈良好的线性关系，相关系数ｒ＝０．９９８８，检量限为０．４ｎｇ／ｍＬ。方法灵敏度高，选择性好。该方法用于硅酸盐矿物如水泥、硅质砂岩、粘土和石灰岩中微量钛的测定获得了满意的结果     

云母钛珠光颜料的液相合成技术 Ⅱ云母钛前驱体的热处理过程研究

以ＴＧ－ＥＧＡ等分析检测手段探明了云母铁颜料包膜层的组成，并对其热处理工艺作了系统的研究，得到了较佳的热处理工艺。同时以ＤＴＡ、ＳＥＭ、ＸＲＤ技术研究了膜层ＴｉＯ＿２粒子在煅烧过程中的形态及物相结构变化过程，结果表明，膜层的水合ＴｉＯ＿２粒子在热处理过程中随着温度的升高逐步晶化，并由锐钛相向金红石相转化。实验制得了金红石相含量较高的云母钛珠光颜料，具有闪亮的光泽和鲜明的色调。     

纳米钙钛矿LaMnO3＋λ的制备与表征

采用柠檬酸络合的溶胶－凝胶法制备了纳米钙钛矿ＬａＭｎＯ３＋λ。利用Ｘ－射线衍射分析、差热分析，透射电镜，比表面积测定对制备过程中的焙烧温度、ｐＨ值、柠檬酸用量、成胶温度及干燥条件等进行了研究。在优化条件下制得的样品（ｐＨ０．５、Ｌａ：Ｍｎ：柠檬酸＝１：１：６，形成胶体的温度６０℃，低温真空干燥后１２０℃干燥，焙烧温度６５０℃），能够有效地催化ＣＯ还原ＮＯ的反应。     

云母钛珠光颜料表面形貌的研究与制备条件的控制

采用液态沉积方法合成了云母钛珠光颜料.利用扫描电子显微镜(SEM)观察云母钛珠光颜料的表面TiO2膜形貌,发现当反应温度为78℃、pH=2.0并且在煅烧升温速率为7.8℃/min时得到的珠光颜料的包覆膜平整、连续、致密,粒径在30-50nm之间,这种珠光颜料具有很好的光学性能.     

固定化细胞合成L—苯丙氨酸的酶活及稳定性

研究了固定化酶ＰＡＬ合成Ｌ－苯丙氨酸过程中的酶活力与酶稳定性情况，找出了维持酶活的最佳保存条件，考察了不同氨基供体、肉桂酸、ｐＨ值及酶的不同固定化量等因素对酶反应过程的影响，确定其适宜反应条件为肉桂酸１．５％～２．０％，醋酸铵２～４ｍｏｌＬ－１，ｐＨ８．５～１０，温度３０℃，细胞固定化量为０．１ｇ湿细胞／ｇ固定化颗粒     

云母钛珠光颜料的液相合成技术：Ⅱ云母钛前驱体的热处理…

以ＴＧ－ＥＧＡ等分析检测手段探明了云母钛颜料包膜层的组成，并对其热处理工艺作了系统的研究，得到了较佳的热处理工艺。同时以ＤＴＡ，ＳＥＭ，ＸＲＤ技术研究了膜层ＴｉＯ２粒子在煅烧过程中的形态及物相结合变化过程，结果表明，膜层的水合ＴｉＯ２粒子在热重宫随着温度的升高逐步晶化，并由锐钛相向金红石相转化。     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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