碳纤维微电极制作与电化学行为的研究

讨论了两种制作碳纤维微电极的方法.研究了微电极的某些电化学行为,并与宏电极的结果进行了比较.验证了在控制电流条件下边缘效应的影响.结果表明,由于传质过程的加快,在通常扫描速度下,微电极伏安技术可测得呈现稳态极化特征的伏安图形,展示了某些良好的应用前景.     

多巴胺在修饰电极上的伏安行为

本文研究了多巴胺（ＤＡ）在铁氰酸钴膜（ＣＨＣＦ）修饰电极上的伏安行为，讨论了各种因素对ＤＡ伏安特性的影响，实验表明，该电极对ＤＡ的氧化有电催化作用。该电极可用于ＤＡ的测定，线性响应范围为４．０×１０－６～２．０×１０－４ｍｏｌ／Ｌ，电极寿命达３０天。     

二茂铁甲酸与鲱鱼精DNA相互作用的电化学研究

用循环伏安、微分脉冲伏安和计时库仑等电化学方法结合紫外光谱法,研究了二茂铁甲酸(FCA)与DNA的相互作用.循环伏安实验表明FCA在玻碳电极上出现一对可逆的氧化还原峰.DNA的加入导致FCA氧化还原峰电流降低,且式电位往正向移动,表明二者可能通过沟面方式发生作用.计时库仑法表明FCA与DNA作用后,复合物扩散系数明显降低,这可能是FCA与DNA反应峰电流降低的原因.微分脉冲实验表明以FCA作为电化学探针,能在1.3×10-5 mol/L～1.0×10-4mol/L浓度范围内对DNA进行定量检测.紫外光谱实验进一步证实了二者的相互作用,且作用模式可能够沟槽结合.     

铂微粒修饰纳米二氧化钛电极对甲醇催化氧化的研究

在纳米二氧化钛膜上修饰铂微粒制得钛基纳米TiO2-Pt(Ti／nano-TiO2-Pt)复合催化电极．用循环伏安法和计时电位法研究了甲醇在Ti／nano-TiO2-Pt电极上电催化氧化．结果表明Ti／nano-TiO2-Pt电极对甲醇氧化具有高催化活性和稳定性．这是由于铂在纳米二氧化钛膜上有较好的分散性．铂微粒与纳米二氧化钛的协同作用．使电极不易中毒．     

第一周期用球形电极示波计时电位理论方程的推导

本文用菲涅尔积分推导了非稳态条件下的第一周期示波计时电位方程,用球形扩散的边界条件和 Fick 第二定律,推导了球形电极示波计时电位理论方程,获得了一些有用的结论。     

槲皮素与DNA的电化学作用研究

用循环伏安法(CV)和双阶跃计时库仑法(DPSCC)研究了槲皮素的电化学性质及其在DNA修饰玻碳电极上与DNA的相互作用,结果表明,槲皮素可以与DNA发生强烈的作用.其作用模式是静电模式,与DNA作用的表面键合常数为K=(3 80±0 3)×104L/mol,键合位点数为1(/每个碱基对),在DNA修饰电极上槲皮素氧化形式与还原形式的键合常数比为KOx/KRed=2 56.     

微盘电极上线性扫描伏安法动力学研究(英文)

研究微盘电极上中等扫速下，准可逆电化学反应的伏安行为。推导适合于多种电化学技术的一般方程。该方程可用于线性扫描伏安法，循环伏安法，阶梯扫描伏安法以及脉冲伏安法等。运用该方程详细地研究了微盘电极上准可逆、不可逆波线性扫描伏安曲线特性     

有限分析法应用IV-微盘电极上一级(EC')催化伏安理论研究

利用有限分析法研究微盘电极上ＥＣ’伏安特性,计算结果表明有限分析法可用于微电极上均相化学反应伏安曲线模拟．提出了微盘电极上测定一级、假一级催化反应速率常数的理论     

对硝基苯甲醚在Cu电极上的电化学还原行为研究

以Cu盘做工作电极,Pt丝做辅助电极,饱和甘汞电极做参比电极,采用循环伏安法和计时电量法等测试手段研究了对硝基苯甲醚在含0.5 mol/L硫酸的甲醇水（体积比3∶2）溶液中的电化学行为,讨论了扫描速度、底物浓度以及温度对对硝基苯甲醚电化学行为的影响.研究证明：对硝基苯甲醚在Cu电极上的电化学还原是受扩散控制的不可逆过程,根据不同扫描速度下循环伏安曲线的峰电流值求得其传递系数α为0.26,计时电量法求得其扩散系数为1.03×10^-5cm²/s.     

在氢氧化钠溶液中TeO3^2—在悬汞电极上的电化学行为

用计时库仑法、常规脉冲伏安法、毛细管电荷曲线,以及循环伏安法研究了TeO_3~(2-)在1M NaOH溶液中在悬汞电极上的电化学行为。实验表明TeO_3~(2-)在悬汞电极表面呈强吸附。依据在各种实验条件下的实验结果,讨论了TeO_3~2的吸附对电化学响应的影响并讨论了电极反应机理。计算了电极反应物在悬汞电折上的吸附量。     

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