邻苯二酚紫—溴化十六烷基三甲铵分光光度法测定微量钛

研究了在阳离子表面活性剂溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，钛与邻苯二酚紫（ＰＶ）显色反应的条件，结果表明，在ＰＨ＝３．２的苯甲酸氢钾－盐酸缓冲溶液中，Ｔｉ（Ⅳ）与ＰＶ和ＣＴＭＡＢ按照１：２：３的摩尔经形成绿色三元配合物，其最大吸收波长位于７３０ｎｍ，摩尔吸光系数为７．４×１０＾４Ｌ．ｍｏｌ＾－１，钛在０．０８－０．４μｇ／ｍＬ范围内符合比尔定律，检测限达０．０２μｇ／ｍＬ．方法用于普碳钢和低     

原子吸收光谱法测定低锑砷合金中的微量元素

运用火焰原子吸收光谱法测定低锑砷合金中的微量元素，系统考察了原子吸收光谱法的测量条件，研究了基体元素的干扰及消除方法，在扰化的实验条件下，Ｃｕ，Ａｇ在０－４ｍｇ．Ｌ＾－１，Ｓｂ在０－８０ｍｇ．Ｌ＾－１的浓度范围内均符合比尔定律，相关系数（ｒ）为０．９９７９－０．９９８７，检出限为０．００５－０．１８０μｇ．ｍＬ＾－１。用于低锑砷合金中微量元素Ｃｕ，Ａｇ，Ｓｂ的测定，相对标准偏差为１．２％－２．４％     

赤霉素的2.5次微分极谱分析

研究在０．６５ｍｏｌ／ＬＨ２ＳＯ４－０．１６ｍｇ／ｍＬ十二烷基苯磺酸钠条件下,赤霉素的氧化产物于－１．０Ｖ（ｖｓＳＣＥ）处产生的灵敏的２．５次微分极谱波的极谱行为,建立一个测定０．０８μｇ／ｍＬ～６μｇ／ｍＬ赤霉素的极谱分析方法。     

Ag（I）—QARH络合物在胶束溶液中的光度性质

在ｐＨ５．０的ＨＯＡｃ－ＮａＯＡｃ缓冲溶液中，当有０．１０％ＳＬＳ存在时，Ａｇ（Ｉ）与ＱＡＲＨ形成１：１络合物，λｍａｘ为５３５ｎｍ，ε为１．０５×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ａｇ（Ｉ）含量在０．００５￣１．００μｇ／ｍＬ范围内服从Ｂｅｅｒ定律，稳定常数为１．７８×１０＾１５。所提出的方法用于精铜矿中微量银的测定，结果满意。     

近红外荧光探针法测定核酸的研究

以阳离子花菁染料为荧光探针, 依近红外荧光猝灭测定核酸． 最大激发及发射波长分别为７６５ 、７９０ｎｍ ． 核酸测定的线性范围为０－０８ ～１－２μｇ／ｍ Ｌ（ＣＴＤＮＡ 及ＳＭ ＤＮＡ） , ０－１ ～１－６μｇ／ｍＬ（ｙｅａｓｔ ＲＮＡ） ．     

高碘酸盐氧化偶氮胂Ⅲ动力学光度测定铑(Ⅲ)

建立了一个以偶氮胂Ⅲ褪色反应为基础的新催化动力学方法． 在ＨＡｃ－ ＮａＡｃ 介质中, 铑催化高碘酸盐氧化偶氮胂Ⅲ褪色, 铑浓度与ｌｏｇ （ Ａ０／ Ａ） 成直线的范围为０ ～０－１６μｇ／ｍ Ｌ （ｒ ＝０－９９８７） ,ｙ＝ ０－２７１０ ｘ－ ０－０６３５ , 检出限为０－１５ｎｇ／ｍＬ, 对０－０８μｇ／ｍＬＲｈ（ Ⅲ） 测定的相对标准偏差为１－５５ ％ （ｎ ＝ １１） ． 铑催化反应对Ｒｈ（ Ⅲ） 和偶氮胂Ⅲ均为一级, 表观活化能为５４－３２ｋＪ／ｍＬ,本法已用于实际样品中痕量铑的测定, 结果满意．     

锇—钼酸盐—碱性染料显色反应的研究

在聚乙烯醇存在下，锇与钼酸铵和碱性染料罗丹明Ｂ，丁基罗丹明Ｂ，耐尔蓝形成离子缔合物，不同碱性染料所形成的缔合物服从比耳定律的浓度范围和摩尔吸光系分别是：０－１．２μｇ／２５ｍｌ和ε５７０ｎｍ＝２．６２×１０＾６Ｌ．ｍｏｌ＾－１ｃｍ＾－１；０－１．０μｇ／２５ｍｌ和ε５７０ｎｍ＝２．８６×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ／２５ｍｌ和ε５８５ｎｍ＝２．８１×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ     

黄酒中微量铜,锌的电位溶出法测定

在ＮＨ３－ＮＨ４Ｃｌ（ｐＨ９．２及ｐＨ５．６）底液中，采用玻碳电极镀汞膜作工作电极，经阴极电解富集后，铜（Ⅱ）在－０．４８Ｖ（ｖｓ．ＳＣＥ），锌（Ⅱ）在－１．０８Ｖ左右呈现良好的氧化溶出峰．峰高对浓度的线性范围：铜为０．１～２．５μｇ／２０ｍＬ，锌为０．２～４．６μｇ／２０ｍＬ．用该方法直接测定了黄酒中的微量铜和锌．     

邻苯二酚紫－溴化十六烷基三甲铵分光光度法测定微量钛

研究了在阳离子表面活性剂溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，钛与邻苯二酚紫（ＰＶ）显色反应的条件．结果表明，在ｐＨ＝３．２的苯二甲酸氢钾－盐酸缓冲溶液中，Ｔｉ（Ⅳ）与ＰＶ和ＣＴＭＡＢ按照１：２：３的摩尔比形成绿色三元配合物，其最大吸收波长位于７３０ｕｍ，摩尔吸光系数为７．４×１０４Ｌ．ｍｏｌ（－１）·ｃｍ（－１），钛量在０．０８～０．４μｇ／ｍＬ范围内符合比尔定律，检测限这０．０２μｇ／ｍＬ．方法用于普碳钢和低合金钢中微量钛的测定，结果令人满意．     

铍—二溴羟基苯基荧光酮Brij—35的显色反应

研究了铍－二溴羟基苯基荧光酮－Ｂｒｉｊ－３５胶束显色反应的最佳形成条件，在ｐＨ８．３－９．５的弱碱性介质中，配合物最大吸收波长是５４８ｎｍ，其表观摩尔吸光系数是１．４２×１０＾５Ｌ．ｍｏｌ＾－１，ｃｍ＾－１，铍量在０－１．６μｇＢｅ／２５ｍＬ范围内遵守比尔定律。     

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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