铜在8－羟基喹啉修饰铅笔芯电极上的伏安特性

本文用８－羟基喹啉修饰的铅笔芯电极研究了铜的阶梯阳极溶出伏安特性，并将此法用于人发中微量铜的测定。实验指出，在此修饰电极上，铜的阶梯溶出峰有两个，１＃峰电位在－０．０３Ｖ，２＃峰电位在０．２７Ｖ处。同样的试液和条件下，１＃峰总比２＃峰的峰电流大。实验研究了测定铜的最佳条件，并测得铜的浓度在４．０×１０－８～１．６×１０－６ｍｏｌ·Ｌ－１范围内，１＃峰的峰高与浓度呈良好的线性关系，最低检测限为２×１０－８ｍｏｌ·Ｌ－１。２＃峰高与铜的浓度在６．０×１０－８～１．６×１０－６ｍｏｌ·Ｌ－１范围内也有较好的线性关系，也可用于测定铜。本文还分析了铜在修饰电极上的反应机理     

Fe—Mn—Si基形状记忆合金的奈尔温度（TN）对马氏体相变...

用静电音频内耗仪测量了Ｆｅ－３０．３Ｍｎ－６．１Ｓｉ,Ｆｅ－２９．０５Ｍｎ－６．２７Ｓｉ－ＲＥ,Ｆｅ－２６．４Ｍｎ－６．０２Ｓｉ－５．２Ｃｒ形状记忆合金在１５０￣６００Ｋ温度范围的内耗及模量变化,确定了三种合金的ＴＮ温度及Ｍｓ温度,通过计算ε→γ相变内耗峰的面积,研究了奈尔温度ＴＮ对γ→ε马氏体相变的影响。结果表明,合金成分显著地影响ＴＮ温度,其中ＲＥ和Ｃｒ均降低ＴＮ温度。随着ＴＮ温度的降低,Ｍｓ     

低发泡聚酯聚氨酯动态力学性能的研究

测试了六种新型低发泡聚酯聚氨酯样品的动态力学性能.发现内耗温度曲线在—10℃和—100℃左右均有α和γ指纹吸收峰.α转变的tanδ值在0.355到0.565范围,α转变的表观活化能为38.08～55.49千卡/克分子;γ转变的表观活化能为10.18～23.83千卡/克分子.六种样品的动态模量E在—37℃～30℃的范围内均急剧下降约二个数量级至1.5×10~8达因/厘米~2左右随后进入"橡胶平台区".观察到了尚未见报导过的"多阶橡胶平台"现象.     

偶次逆幂势和高次倍谐振子势的叠加势的径向Schr¨odinger方程的精确解

采用连续分数法，得到势函数Ｖ（ｒ）＝α１ｒ１０＋α２ｒ４＋α３ｒ２＋β３ｒ－４＋β２ｒ－６＋β１ｒ－１０的径向Ｓｃｈｒ¨ｏｄｉｎｇｅｒ方程的精确解．     

中枢神经系统中GABA_A受体的亚单位组合

分子生物学研究阐明中枢神经系统中抑制性神经递质γ氨基丁酸 Ａ 型（ Ｇ Ａ Ｂ Ａ Ａ）受体由不同的蛋白质亚单位组合构成。至今,１５ 种亚单位,即６ 种α（α１α６ ）、３ 种β（β１β３）、３ 种γ（γ１γ３）、１ 种δ和２ 种ρ（ρ１ρ２）已被克隆和定序,而且还发现存在２ 种γ２（γ２ Ｓ和γ２ Ｌ）、２ 种β４及γ４亚单位形式。每个亚单位由位于不同染色体上的不同的基因编码,它们在脑中具有不同的而又可交叉的区域分布。不同区域的由不同亚单位组合的 Ｇ Ａ Ｂ Ａ Ａ 受体具有不同的药理学和生理学特征     

偶次逆幂势和高次倍谐振子势的叠加势的径向Schroedinger方程 …

采用连续分数法，得到势函数Ｖ（ｒ）＝σ１ｒ＾１０＋α２ｒ＾４＋α３ｒ＾２＋β３ｒ＾－４＋β２ｒ＾－６＋β１ｒ＾－１０的径向Ｓｃｈｒｏｅｄｉｎｇｅｒ方程的精确解。     

具有磁分裂样品的无反冲分数fa的测定

研究了由样品厚度而引起的饱合效应对穆斯堡尔谱产生的影响，对于磁分裂样品，应取其透射谱中３．４峰的温度计算信噪比为宜，据此测量得到α－Ｆｅ２Ｏ３的无反冲分数ｆａ在室温下为０．６５。     

非晶态Fe77Cr13Zr10合金的临界现象

测量了非晶态Ｆｅ７７Ｃｒ１３Ｚｒ１０合金的磁化强度与温度和磁场的关系．在居里点附近样品的磁特性符合二级相变规律，得到临界指数β＝０．４０，γ＝１．４５，δ＝４．８５，样品的居里温度Ｔｃ＝（２１２．１±０．３）Ｋ．在实验误差范围内，临界指数β、γ、δ满足关系式γ＝β（δ－１），在１９０～２５０Ｋ温度范围内，实验数据满足二级相变的磁状态方程．     

β—TCP／HA双相磷灰石粉末的制备及其性质的研究

通过严格控制反应条件，以共沉淀方式合成出不含α－磷酸三钙［α－Ｃａ３（ＰＯ４）２］（α－ＴＣＰ）并组成一定的β－磷酸三钙／羟基磷灰石［β－Ｃａ３（ＰＯ４）２／Ｃａ１０（ＯＨ）２（ＰＯ４）６］（β－ＴＣＰ／ＨＡ）双相磷灰石粉末，分析了β－ＴＣＰ／ＨＡ双相磷灰石粉末的理化性质。     

β－TCP／HA双相磷灰石粉末的制备及其性质的研究

通过严格控制反应条件，以共沉淀方式合成出不含α－磷酸三钙［α－Ｃａ３（ＰＯ４）２］（α－ＴＣＰ）并组成一定的β－磷酸三钙／羟基磷灰石［β－Ｃａ３（ＰＯ４）２／Ｃａ１０（ＯＨ）２（ＰＯ４）６］（β－ＴＣＰ／ＨＡ）双相磷灰石粉末，分析了β－ＴＣＰ／ＨＡ双相磷灰石粉末的理化性质．     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has