不同电位下催化电合成聚吡咯膜的电化学行为

通过循环伏安法研究了以Ｔ＿ｓＯＨ（对甲苯磺酸），ＨＣｌ＿４，Ｈ＿２ＳＯ＿４，ＮａＣｌＯ＿４和Ｎａ＿２ＳＯ＿４为支持电解质，Ｔｉｒｏｎ为催化剂，在不同电位范围催化电合成聚吡咯（ＰＰＥ／Ｐｔ）和该膜电极在相应支持电解质水溶液中的电化学行为．发现ＰＰＥ／Ｐｔ的ＣＶ图、稳定性和电活性随聚合电位及阴离子种类的变化明显不同于非催化电合成聚吡咯．在０～０．８Ｖ电位范围制得的ＰＰＥ／Ｐｔ的稳定性最好，并随支持电解质的变化按Ｔ＿ｓＯＨ，ＨＣｌＯ＿４，Ｈ＿２ＳＯ＿４，ＮａＣｌＯ＿４和Ｎａ＿２ＳＯ＿４的顺序减小．同时讨论了产生变化的原因．     

硅在碱溶液中的反应动力学研究

本文用量气法较为系统地研究了碱浓度对Ｓｉ－Ｈ＿２Ｏ体系的反应速度影响规律，得出硅在碱溶液中的反应本质是碱催化Ｓｉ和Ｈ＿２Ｏ的反应；反应过程中，ＳｉＯ＿２／Ｎａ＿２Ｏ的比值并不确定，而随反应条件改变以及反应在一定条件下为零级反应的结论。     

米仓山区碱性花岗岩的物质组分

古老的碱性花岗岩在地壳中较为罕见。分布在米仓山区的碱性花岗岩属晋宁期同源岩浆演化后期的产物，其岩石化学成分以富碱（Ｋ＿２Ｏ＋Ｎａ＿２Ｏ＞８．０％）为特征，且Ｎａ＿２Ｏ＞Ｋ＿２Ｏ；含多种稀土、稀有分散元素。副矿物种类繁多，人工重砂中重矿物达３２种之多。稀土、稀有分散元素赋存状态多样。详细研究其物质组成及其特征对深入探索区内岩浆演化规律、元素地球化学特征及其成矿作用具有重要的理论和实际意义。     

Na_2CO_3在油砂中的损耗及一些离子的浓度变化

模拟了Na2CO3碱水溶液驱三次采油过程并测定了碱耗量，分析了K+，Ca2+，Mg2+，Al3+及SiO32-浓度的变化．对辽河油田油砂与Na2CO3溶液反应过程中几种离子浓度的分析表明，在碱作用下，油砂既发生一定的溶解又有再沉积过程；地层水的硬度将会影响耗碱量．     

速冻蔬菜的最适烫漂时间与其过氧化物酶活性测定研究

本试验以各种蔬菜：菠菜、芹菜、花菜、芦笋、土豆、大头菜、蒜苗中的过氧化物酶活性为研究对象：在不同温度下进行烫漂处理后其ＰＯＤ活力具有再生现象，于是确定在９５°Ｃ下烫漂得到不同蔬菜的最佳烫漂时间分别为菠菜１ｍｉｎ，蒜苗２．５ｍｉｎ，芹菜３ｍｉｎ，芦笋４ｍｉｎ，青菜１．５ｍｉｎ，大头菜１．５ｍｉｎ，花菜２．５ｍｉｎ，土豆３ｍｉｎ；还进一步比较研究了添加柠檬酸、Ｎａ＿２ＣＯ＿３、ＣｕＳＯ＿４等化学药品对蔬菜烫漂处理中ＰＯＤ活性的影响，结果用适宜浓度的Ｎａ＿２ＣＯ＿３（１０￣（－５）Ｍ）或ＣｕＳＯ＿４（４．０×１０￣（－４）Ｍ）溶液烫漂处理具有护色和杀酶的协同效果。     

锑在硼砂溶液中阳极成极膜规律的研究（Ⅱ）

本文利用线性电位扫描，ｘ射线衍射和恒电位阳极极化电流与时间的关系研究了锑在０．０５ｍｏｌ·ｄｍ－３Ｎａ２Ｂ４Ｏ７＋０．５ｍｏｌ·ｄｍ（－３）Ｎａ２ＳＯ＿４溶液中（ＰＨ＝９．１，３０℃）于１．２Ｖ（ＶＳ．ＳＣＥ）阳极成膜３ｈ，阳极形成膜相组成及其生长规律。实验结果表明，本工作中的阳极膜主要组成是Ｓｂ＿２Ｏ＿３和ＳｂＯＨＳＯ＿４·Ｈ＿２Ｏ，膜生长规律大致包括金属的溶解→氧化物膜的形成与增厚→膜的钝化。     

氨基乙酸、DL－氨基丙酸在1mol·kg~（－1）Na_2CO_3水溶液中的粘

本文采用高精度光电计时粘度计及单茎毛细管密度瓶分别测定了在２８８．１５～３２８．１５Ｋ温度区间内，氨基乙酸和ＤＬ－氨基丙酸在１ｍｏｌ·ｋｇ￣（－１）Ｎａ＿２ＣＯ＿３水溶液中的粘度及密度数据；计算了两种氨基酸在该溶液中的粘度Ｂ系数及极限偏摩尔体积；拟合出了粘度Ｂ系数与温度的关系方程；讨论了氨基酸的引入对Ｎａ＿２ＣＯ＿３水溶液结构的影响规律；用流动过渡状态理论得到了两种氨基酸在１ｍｏｌ·ｋｇ￣（－１）Ｎａ＿２ＣＯ＿３，溶液中的流动活化参数．     

聚氧乙烯烷基酚醚羧甲基盐耐盐耐硬性能的考察

针对高矿化度油藏条件状况，结合表面活性剂－碱剂－聚合物三元复合化学驱油体系及活性水驱的开发，考察了聚氧乙烯烷基酚醚羧甲基钠盐（ＡＰＣ（Ｎａ）－ｎ）的耐盐耐硬性能，重点考察了ＡＰＣ（Ｎａ）－２与碱剂复配时的耐盐耐硬性能，且与石油磺酸盐ＴＲＳ－４０作了比较。结果表明，ＡＰＣ（Ｎａ）－ｎ具有优良的耐盐耐硬性能，可望用于高矿化度油藏条件下的化学驱油。ＡＰＣ（Ｎａ）－２与ＮａＯＨ复配产生协合效应，使耐Ｃａ￣（２＋）、Ｍｇ￣（２＋）性能显著提高，对ｃａ￣（２＋）、Ｍｇ￣（２＋）的耐受能力已可满足实际油藏硬度条件的要求。ＡＰＣ（Ｎａ）－２与Ｎａ＿２ＣＯ＿３的复配对Ｃａ￣（２＋）和Ｍｇ￣（２＋）耐受性能影响不大，而复配Ｎａ＿２ＳｉＯ＿３则使耐Ｃａ￣（２＋）和Ｍｇ￣（２＋）性能显著下降，实验中还发现，同号无机离子对羧酸盐型活性剂的胶束性质存在影响。     

N_（503）从H_（2）SO_（4）－Cl~－、Br~－、I~－体系中萃取铋

Ｎ＿（５０３）是国产的酰胺类萃取剂．它在有色和稀有金属萃取分离上得到了日益广泛的应用￣［１～３］．本文研究Ｎ＿（５０３）从Ｈ＿２ＳＯ＿４－ＮａＣｌ、Ｈ＿２ＳＯ＿４－ＮａＢｒ、Ｈ＿２ＳＯ＿４－ＫＩ三个体系中萃取铋的规律，探索萃取能力与水相络阴离子ＢｉＣｌ￣－＿４、ＢｉＢｒ￣－＿４和ＢｉＩ￣－＿４稳定性的关系．研究了水相酸度和Ｃｌ￣－、Ｂｒ￣－、Ｉ￣－浓度对Ｎ＿（５０３）萃取铋的影响，取得了较好的结果，不仅对有色和稀有金属的萃取分离有重要的实际意义，而且对萃取化学理论也有一定的价值．     

受污染氢氧化钠滴定一元酸

研究了受污染氢氧化钠（ＮａＯＨ＋Ｎａ＿２ＣＯ＿３）体系滴定一元酸的滴定曲线，为评价一元强碱强酸滴定找出了准确度指标。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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