非有机溶剂萃取光度法测定铀的研究—PEG—Arsenazo Ⅱ—（NH_4）_2SO_4体系

本文研究了偶氮胂（Ⅲ）作萃取剂和显色剂，在ＰＥＧ－（ＮＨ４）２ＳＯ４－Ａｒｓｅｎａｚｏ（Ⅲ）体系中的非有机溶剂萃取光度法测定铀．将配合物从ｐＨ２．０（ＨＣｌ）溶液或ＨＣｌ—ＮａＡｃ缓冲溶液）水溶液中萃取至ＰＥＧ相，其最大吸收波长位于６５５ｎｍ，摩吸光系数为３．０×１０４Ｌ．ｍｏｌ－１．ｃｍ－１，Ｕ（ＶＩ）的线性范围为０－４．５μ／ｍｌ，轴与ＡｒｓｅｎａｚｏＣ（Ⅲ）的配位组成为１：１．将方法用于煤渣中铀的测定，获得了满意结果．     

溶剂萃取热力学的研究──TBP-nC_7H_(16)-HNO_3体系热力学平衡常数的测定

本文研究了ＴＢＰ－ｎＣ７Ｈ１６－ＨＮＯ３ 萃取体系在２５℃和１大气压下的分配平衡。萃取剂 ＴＢＰ的浓度变化范围为 ５％－１００％（Ｖ／Ｖ）。用 Ｐｉｔｚｅｒ公式计算了水相硝酸的活度系数，应用诸热力学关系特别是 Ｇｉｂｂｓ－Ｄｕｈｅｍ关系由实验结果导出了有机相中四个组分（溶解水、正庚烷、萃取剂和萃合物）的活度系数，从而求出了萃取反应的热力学平衡常数Ｋａｏ六个萃取剂浓度下独立求得的平衡常数值很接近，可以写作Ｋａ＝０．２６±０．０３。     

对－亚硝基二甲苯胺萃取光度法测钯

提出了用对－亚硝基二甲苯胺作萃取剂和显色剂，三氯甲烷作溶剂，直接萃取分光光度法测定钯．研究了测定的最佳条件．摩尔吸光系数为８．１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，５倍重量的铂不干扰．本方法操作简便，应用于催化剂中钯的测定，效果满意     

冕宁稀土矿浸出液萃取转型工艺研究

对四川冕宁稀土矿硫酸焙烧后的浸出液萃取转型工艺进行了研究，确定了萃取转型有机相为ＨＡＣ－煤油体系，转型条件为：水相酸度为ｐＨ＝４．０；稀土离子水相初始浓度为０．１Ｍ；萃取时间大于５ｍｉｎ，用３ＭＨＣｌ溶液作反萃液，制得了稀土氯化物和氧化物产品。     

对—亚硝基二甲苯胺萃取光度法测钯

提出了用对－亚硝基二甲苯胺作萃取剂和显色剂，三氯甲烷作溶剂，直接萃取分光光度法测定钯，研究了测定的最佳条件，摩尔吸光系数为８．１×１０＾４Ｌ．ｍｏｌ＾－１，ｃｍ＾－１，５倍重量的铂不干扰。本方法操作简便，应用于催化剂中钯的测定，效果满意。     

萃取色谱法分离─火焰原子吸收法测定岩矿中的微量银

本文提出了以甲基磷酸二甲庚脂（Ｐ３５０）为固定相，硅烷化硅胶为载体，０．５ｍｏｌ／Ｌ．ＨＣＩ—０．１ｍｏｌ／ＬＮａＳＣＮ溶液为流动相，采用０．１ｍｏｌ／ＬＨＣＩ—０．６ｍｏｌ／ＬＮａＳＣＮ作洗脱液的萃取色谱法分离微量银的方法。研究了分离测试条件和干扰等。并对岩石矿物中的微量银进行了分离测定，获得良好结果。回收率达（９７—１０５）％。     

萃取色谱法分离——火焰原子吸收法测定岩矿中的微量银

本文提出了以甲基膦酸二甲庚脂（Ｐ３５０）为固定相，硅烷化硅胶为载体，０．５ｍｏｌ／ＨＣｌ－０．１ｍｏｌ／ＬＮａＳＣＮ溶液为流动相，采用０．１ｍｏｌ／ＬＨＣｌ－０．６ｍｏｌ／ＬＮａＳＣＮ作洗脱液的萃取色谱法分离微量银的方法，研究了分离测试条件和干扰等。并对岩石矿物中的微量银进行了分离测定，获得良好结果，回收率达（９７－１０３）％。     

硝酸反萃取火焰原子吸收光谱测定腺苷钴铵片中微量钴

研究了以１ｍｏｌ．Ｌ＾－１ＮＨ４ＳＣＮ为介质,甲基异丁基甲酮萃取,４ｍｏｌ．Ｏ＾－１硝酸反萃取火焰原子吸收光谱水相测定微量钴的方法,钴量在０－５ｍｇ．Ｌ＾－１范围内呈良好的线性关系,检出限为０．０７０ｍｇ．Ｌ＾－１,相对标准偏差为１．１７％,该方法适用于腺苷钴胺片中微量钴的测定。     

用MIBK萃取铂族金属离子的硫氰酸配合物研究Ⅰ．钯（Ⅱ）的萃取

研究了有硫氰酸盐存在下用ＭＩＢＫ（甲基异丁基酮）萃取Ｐｄ（Ⅱ）；在０．５～４．０ｍｏｌ／ＬＨＣｌ介质中，有１０００倍ＳＣＮ￣－存在下，Ｐｄ（Ⅱ）被定量萃取，有机相：水相可达１：５．萃取容量达１．２ｇ／Ｌ，通过对各级配合物分布的计算，表明此时Ｐｄ（Ⅱ）以Ｐｄ（ＳＣＮ）＿４形式存在，初步认为是Ｐｄ（ｓｃＮ）＿４与质子化的Ｍ１８Ｋ形成盐而被萃取。     

水－醋酸体系中HCl的活度系数与Pitzer参数

运用氢玻璃电极与氯离子膜电极，测定了２９８．２Ｋ下电池（Ｈ＋）玻璃电极｜ＨＣｌ（ｍ），ＮＡｃ（Ｗ）＋Ｈ２Ｏ（１－Ｗ）｜（Ｃｌ－）膜电极的电动势，并求得了ＨＣｌ浓度分别为ｍ＝０．０１０，０．０２０，０．０４０，０．０６０，０．０８０，０．１００，０．１２０时在不同组成（１０％～９０％）的水－醋酸混合溶剂中的平均活度系数，进而通过多元线性拟合，求得了ＨＣｌ在不同组成溶剂中的Ｐｉｔｚｅｒ参数β０、β１、Ｃφ。最后对数据处理方法及结果进行了讨论。     

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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