丁基罗丹明B—钨酸钠—PVA高灵敏光度法测定痕量钯的研究

研究了在聚乙烯醇（ＰＶＡ）存在下,钯与钨酸钠和丁基罗丹明Ｂ（ＢＲＢ）反应形成的有色离子缔合物用于痕量钯的光度法测定．最佳条件为：［Ｈ２ＳＯ４］＝１．２ｍｏｌ·Ｌ－１,［ＷＯ２－４］＝９．１×１０－５ｍｏｌ·Ｌ－１,［ＢＲＢ］＝３．０×１０－５ｍｏｌ·Ｌ－１．缔合物的最大吸收位于５７５ｎｍ处,表观摩尔吸光系数ε＝７．９８×１０７Ｌ·ｍｏｌ－１·ｃｍ－１．钯量在０～１０ｎｇ／２５ｍｌ范围内服从比尔定律．体系至少稳定１４０ｈ,检测限（３σ）０．０４８μｇ·Ｌ－１（ｎ＝１０）,对０．４０μｇ·Ｌ－１Ｐｄ（Ⅱ）测定的相对标准偏差为３．３９％（ｎ＝１１）．缔合物的摩尔比为Ｐｄ∶ＢＲＢ＝１∶４．考察了５０多种共存离子的影响．本法已用于炭基和铝基钯催化剂中微量钯的测定,结果满意     

锇─钼酸盐──碱性染料显色反应的研究

在聚乙烯酸（ＰＶＡ）存在下，锇与铅酸铵和碱性染料（罗丹明Ｂ，了基罗丹明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数分别是：０￣１．２μｇ／２５ｍｌ和ε５７０ｎｍ＝２．６２×１０６Ｌ·ｍｏｌ－１·ｃｍ－１（罗丹明Ｂ体系），０￣１．０μｇ／２５ｍｌ和ε５７０ｎｍ＝２．８６×１０６Ｌ·Ｃｍ－１（丁基罗丹明Ｂ体系）；０～１．８μｇ／２５ｍｌ和ε５８５ｎｍ＝２．８１×１０６Ｌ·ｍｏｌ－１·ｃｍ－１（耐尔蓝体系）研究了三个显色体系的光度特性和３０多种共存离子的影响，方法用于一些催化剂和冶金产品中锇的测定，结果满意．     

微孔滤膜富集分光光度法测定痕量硒

本文介绍了Ｓｅ（Ⅳ）与硫氰酸盐和罗丹明Ｂ形成三元离子缔合物，通过微孔滤膜富集，用二甲基亚砜将膜及缔合物溶解，在分光光度计上测量吸光值，从而测得痕量Ｓ（Ⅳ）的方法．缔合物最大吸收波长为５８０ｎｍ，Ｓｅ含量在０～２μｇ·ｍｌ－１范围内遵从比耳定律．本方法灵敏度高，表观摩尔吸光系数ε５８０＝２．０×１０６Ｌ·ｍｏｌ－１·ｃｍ－１，且稳定性高，重现性好     

金—钼酸盐—罗丹明B—PVA分光光度法测定痕量金的研究

研究了在聚乙烯醇（ＰＶＡ）存在下，金—钼酸铵配阴离子与罗丹明Ｂ离子缔合物分光光度测定痕量金的新方法。该缔合物在高氯酸介质中最大吸收波长为５７０ｎｍ，表观摩尔吸光系数ε＝１．０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，０－３μｇＡｕ／ｍｌ范围内服从比耳定律。该法灵敏度高、稳定性好，选择性和精密度均较好。本法用于矿石中金的测定，获得满意的结果     

钌(Ⅲ)-钼酸盐-乙基罗丹明B-PVA体系缔合显色反应研究

在聚乙烯醇存在下,钌与钼酸盐和乙基罗丹明Ｂ（ＥＲＢ）形成有色离子缔合物。最佳反应条件为「ＨＣｌＯ４」＝１．２ｍｏｌ．Ｌ＾－１,「ＭｏＯ＾２－４」＝６．８＊１０＾－４ｍｏｌ．Ｌ＾－１,「ＥＲＢ」＝３．２＊１０＾－５ｍｏｌ．Ｌ＾－１,ｗ（ＰＶＡ）＝０．０８％。缔合物的最大吸收位于５７５ｎｍ,表观摩尔吸光系数ε＝２．３２＊１０＾６Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,钌量在０－２４μｇ．Ｌ＾－１范围内服从比耳定     

1—苯基—3—甲基—4—（α—呋喃甲酰基）—5—吡唑酮与中性萃取剂协同萃取钇（Ⅲ）的研究

本文研究了１－苯基－３－甲基－４－（α－呋喃甲酰基）－５－吡唑酮（ＨＡ）单独萃取Ｙ（Ⅲ）及其与二苯亚砜（ＤＰＳＯ），磷酸三丁酯（ＴＢＰ）或三辛基氧膦（ＴＯＰＯ）协同萃取Ｙ（Ⅲ）的行为。确定了萃合物的组成分别为ＹＡ＿３，ＹＡ＿３·ＤＰＳＯ，ＹＡ＿３·ＴＢＰ和ＹＡ＿２（ＮＯ＿３）·２ＴＯＰＯ．算得萃取平衡常数分别为：ｌｏｇＫ＿（Ａ（ＨＡ））＝－６．８６，１ｏｇＫ＿（ＡＢ（ＨＡ＋ＤＰＳＯ））＝－３．８９，ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＢＰ））＝－２．５３和ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＯＰＯ））＝５．１３．     

Cr（Ⅲ）－5－Br－PADAP－NH_2OH三元配合物组成及光谱研究

本文研究了Ｃｒ（Ⅲ）－５－Ｂｒ－ＰＡＤＡＰ－ＮＨ２ＯＨ配合物的组成比，得到Ｃｒ（Ⅲ）：５－Ｂｒ－ＰＡＤＡＰ：ＮＨ２ＯＨ＝１∶１∶１．并通过紫外一可见及红外光谱对该配合物的分子结构进行了研究，推断出该三元配合物的配位情况及结构。     

配合物Eu（P—MOBA）3bpy的晶体结构

在乙醇溶液中合成了对甲氧基苯甲酸－２，２′－联吡啶铕配合物的晶体，用ｘ－射线衍射方法测定了配合物的单晶结构，其结构式为Ｅｕ２（Ｐ－ＭＯＢＡ）６（ｂｐｙ）２Ｃ２Ｈ５ＯＨ（Ｐ－ＭＯＢＡ：对甲氧基苯甲酸根离子；ｂｐｙ；２，２′联吡啶），属三斜晶系ＰＴ空间群，晶胞参数；ａ＝１４８２（３）ｎｍ，ｂ＝１．３９０１（２）ｎｍ，ｃ＝１．０９４８（２）ｎｍ；α＝１０３．６３（１）＾０，β＝９２．６７（２）６０，γ＝     

1，4－双（1′－苯基－3′－甲基－5′－氧代吡唑－4′－基）丁二酮－〔1，4〕萃取稀土的研究

在硝酸介质中，研究了１，４－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）丁二酮－〔１，４〕（Ｈ２ＢＰＭＰＢＤ，记为Ｈ２Ａ）的氯仿溶液对ＲＥ３＋（ＲＥ＝Ｌａ，Ｐｒ，Ｎｄ，Ｇｄ，Ｙ，Ｄｙ）离子的萃取平衡．用斜率法和等摩尔系列法确定了萃合物的组成为ＲＥＢＰＭＰＢＤ·ＨＢＰＭＰＢＤ，测定了其半萃取ｐＨ值和萃合反应的热力学函数     

UO2（PMBP）2HMPA配合物的合成与结构研究

合成了ＵＯ_２（ＰＭＢＰ）_２ＨＭＰＡ（ＰＭＢＰ＝１－苯基－３－甲基－４－苯甲酰基－吡唑啉酮－５，ＨＭＰＡ＝六甲基磷酰胺），测定了该配合物的元素组成、红外光语、质子核磁共振谱及晶体结构。该晶体属于单斜晶系，空间群为Ｐ２_１，ａ＝１．１４６８（５）ｎｍ，ｂ＝１．４７７７（２）ｎｍ，ｃ＝１．４０５６（６）ｎｍ，β＝１００．９１（４）°，Ｖ＝２．３３８９ｎｍ￣３，Ｄ_ｃ＝１．４３ｇ／ｃｍ￣３，Ｚ＝２，Ｆ（０００）＝９７９．８５。在配合物中，Ｕ原子采用七配位，其配位多面体为扭曲的五角双锥。     

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

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