[Mn(CHZ)_3](ClO_4)_2的极谱伏安行为研究

以硼酸缓冲溶液和氨水缓冲溶液的混合溶液为底液,使用示差脉冲法(DP)、方波法(SqW)和循环伏安法(CV)研究了在不同pH值条件下[Mn(CHZ)3](ClO4)2的极谱伏安行为(CHZ:碳酰肼)。实验结果表明,[Mn(CHZ)3](ClO4)2在电极表面具有吸附性,在DP和SqW方法中峰电位与pH值呈线性关系;而在CV法中峰电位则不受pH值的影响。极谱伏安法适合于该配合物的检测,并且具有灵敏度高、操作简单、快速等优点。     

示差脉冲极谱法研究—Ⅷ可逆波的分辨率

本文提出了示差脉冲极谱可逆波分辨率(Ra)的定义和公式,据此可以根据半波电位和波的宽度计算出相邻两个示差脉冲极谱波的分开的程度。如果R_a=1,两波能分开,R_a=1.5,两波能较好地分开。实验结果与理论预示完全相符。     

[Mn(CHZ)3](CIO4)2的极谱伏安行为研究

以硼酸缓冲溶液和氨水缓冲溶液的混合溶液为底液,使用示差脉冲法（DP）、方波法（SqW）和循环伏安法（CV）研究了在不同pH值条件下[Mn（CHZ）3]（ClO4）2的极谱伏安行为（CHZ：碳酰肼）。实验结果表明,[Mn（CHZ）3]（ClO4）2在电极表面具有吸附性,在DP和SqW方法中峰电位与pH值呈线性关系;而在CV法中峰电位则不受pH值的影响。极谱伏安法适合于该配合物的检测,并且具有灵敏度高、操作简单、快速等优点。     

聚L-谷氨酸/石墨烯修饰电极对碘的测定

使用循环伏安法制备了聚L-谷氨酸/石墨烯修饰电极,应用扫描电镜和阻抗对修饰电极进行了表征,建立了示差脉冲伏安法测定碘的新方法。研究结果表明,在最佳实验条件下,使用示差脉冲伏安法(DPV)法测定碘,碘浓度在1.00×10-3～5.00×10-7 mol/L浓度范围内与峰电流呈现良好的线性关系,检出限为1.00×10-7 mol/L。该方法用于测定样品中的碘,结果令人满意。     

差分脉冲极谱法测定苯胺中微量硝基苯

建立了测定苯胺中微量硝基苯的差式微分脉冲极谱法。试验发现硝基苯在-0．57V(vs．Ag／AgCl)处有一个良好的差分脉冲极谱峰。硝基苯质量浓度在1～600μg/mL的范围内，质量浓度与差分脉冲极谱峰的峰高呈线性关系。此法简便、快速、灵敏，结果准确。     

植物分子的电分析化学研究(ⅩⅦ)──转基因植物体活性组分的差示脉冲极谱法测定

用差示脉冲极谱法对转基因植物黄耆中有效成分叶酸进行了研究,并建立了相应的检测体系．该方法简便迅速,灵敏度高,能用于中药黄耆的生理生态机理的研究．     

植物分子的电分析化学研究（ⅩⅦ）：转基因植物体活性组分的 …

用差示脉冲极谱法对转基因植物黄耆中有效成分叶酸进行了研究，并建立了相应的检测体系。该方法简便迅速，灵敏度高，能用于中药黄耆的生理生态机理的研究。     

DEPT法确定石油样品~(13)C谱线的多重性

使用无失真极化转移增强技术(DEPT)可获得13_C—NMR谱中CH,CH_2和CH_3各基团子谱,应用此法测定了若干石油样品C谱线的多重性.实验表明,DEPT技术用于样品的结构分析,效果较好.运用此方法可省时、省力,并可获得很高的信噪比.     

差示脉冲极谱法对Cd(Ⅱ)与二元有机弱酸形成的混配配合物的研究

在温度为20±0.2℃和35±0,2℃、离子强度μ(NaNO3)=0.12时,用差示脉冲极谱法研究了Cd(Ⅱ)-草酸(OX)、Cd(Ⅱ)-己二酸(HADT)二元体系及Cd(Ⅱ)-草酸(OX)-己二酸(HADT)三元体系所形成的配合物.结果表明,配合物的电极还原反应是可逆的,并受扩散控制.在Cd(Ⅱ)-草酸(OX)-已二酸三元体系中研究发现有[Cd(OX)(HADT)2]4-、[Cd(OX)2(HADT)4-、[Cd(OX)(HADT)]2-3种配合物存在.在不同温度下(20℃和35℃),测定了它们的稳定常数,并对二元体系及三元体系的部分热力学函数进行了研究和探讨.     

杂多阴离子α-[P_2W_(16)N_(b2)O_(63)]~(8-)的合成与表征

合成了通式为α-M_(8-m)H_m[P_2W_(16)N_(b2)O_(52)]·XH_2O(M=K,TMA,TEA,TBA)的四种盐,并通过IR、UV、极谱、XPS等测试手段对其结构和性质进行了表征,同时对样品的31P—NMR谱给予了合理的解释。     

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

正~~