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     

2—（2—噻吩偶氮）—5—二乙氨基酚高灵敏分光光度法测定痕量镍

在ｐＨ５４～７５范围内，镍与２（２噻吩偶氮）５二乙氨基酚（ＴＡＤＡＰ）形成最大吸收波长位于５６３ｎｍ的红色配合物，显色反应具有很高的灵敏度，摩尔吸光系数为１５６×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，并且色泽稳定，在０～１５μｇ／２５ｍＬ范围内符合比耳定律．该方法可用于铝合金中镍的测定．     

离子缔合物光度法测定黑色食品中微量磷

研究了罗单明Ｂ－磷钼杂多酸离子缔合物体系的光谱特性，确定了用于分光光度法测磷的最佳条件．在非离子表面活性剂聚乙烯醇（ＰＶＡ）存在下，缔合物的λｍａｘ＝５９２ｎｍ，表观摩尔吸光系数ε５９２＝１．８×１０５Ｌ·ｍｏＬ－１·ｃｍ－１，缔合物中ＲｈＢ∶Ｐ（Ⅴ）＝４∶１．     

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     

用BDEPAP·Ⅰ光度法测定水中阴离子表面活性剂

碘化１－苄基－４　４－二乙基氨基苯偶氮）吡啶是一个新的阳离子染料，能与阴离子表面活性剂如十二烷基苯磺酸钠形成离子缔合物，用氯仿萃取，萃取液在５６５ｎｍ测定吸光度，阴离子表面活性剂在氯仿中的浓度为０～１．６×１０￣（－５）ｍｏｌ·ｄｍ￣（－３）服从比耳定律，表观摩尔吸光系数为７．０×１０￣４．用于水中微量阴离子表面活性剂的测定．     

铁,锰—PAN配合物吸附波及其应用

在５×１０－５ｍｏｌＬ－１的１－（２－吡啶偶氮）－２－萘酚（ＰＡＮ）－０．０５ｍｏｌＬ－１磺基水杨酸（ＳＳＡＬ）－０．３７５ｍｏｌＬ－１ＮａＯＨ体系中，铁、锰与ＰＡＮ形成的配合物均有灵敏的配合物吸附波，导数峰电位铁为－０．６３Ｖ（ｖｓＳＣＥ），锰为－０．５５Ｖ，其浓度在一定范围内与峰电流有良好线性关系用于物质中（如人发）微量铁、锰连续测定，结果满意．     

镝－钆－BPMPHD—CTMAB共发光体系的研究及其分析应用

镝－ＢＰＭＰＨＤ—ＣＴＭＡＢ离子缔合物体系具有较强的荧光强度．在该体系中，Ｇｄ３＋、Ｙ３＋、Ｌｕ３＋和Ｌａ３＋等稀土离子均能使镝的荧光增强，这是新发现的一种共发光体系．本文详细研究了镝－钆－ＢＰＭＰＨＤ－ＣＴＭＡＢ体系共发光效应的形成条件和影响因素．实验表明，在最佳测试条件下，镝在１．０×１０－７～６．０×１０－６ｍｏｌ／Ｌ范围内与其荧光强度呈线性关系，检出限为２．０×１０－８ｍｏｌ／Ｌ，它比无Ｇｄ３＋存在时体系的检出限降低了一个数量级．应用该体系测定稀土氧化物及稀土合成样品中痕量镝，结果较为满意．     

超高灵敏显色反应测定痕量锑──锑（Ⅲ）─罗丹明B─碘化钾体系

本文研究结果表明，水溶性大分子化合物阿拉伯胶和非离子表面活性剂ＴｒｉｔｏｎＸ－１００共同存在下，锑碘配阴离子和罗丹明Ｂ的显色反应具有很高的灵敏度。缔合物的最大吸收在５ｇ０ｎｍ，摩尔吸光系数ε＝６．１×１０￣５Ｌ·ｍｏｌ－１·ｃｍ－１。用巯基棉富集锑，分离干扰离子。本法可应用于有色金属中痕量锑的测定。     

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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