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。     

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     

HPMBP与N_（1923）协同萃取钯（Ⅱ）的研究

研究了１－苯基－３－甲基－４－苯甲酸吡哇酮－５（ＨＰＭＢＰ）和伯胺Ｎ１９２３的氯仿溶液从硝酸介质中协同萃取钯（Ⅱ）的平衡．结果表明，当［Ｎ１９２３］＞１．５０×１０－２ｍｏｌ·ｄｉｎ－３时，ＨＰＭＢＰ－Ｎ１９２３－ＣＨＣｌ３体系对钯（Ⅱ）出现反协草效应．应用对应溶液法原理探讨了ＨＰＭＢＰ与Ｎ１９２３在溶液中的缔合行为，解释了出现反协革效应的原因．     

石油亚砜在混合澄清槽中萃取钯的试验

通过用石油亚砜作萃取剂，在混合澄清槽中进行萃取钯的试验，确定了萃取肥的工艺条件：三级萃取、六级洗涤、三级反萃，各流动相的进出口流量为１５ｍｌ．ｍｍ＾１在这工艺条件下回收的钯的纯度为９９．９０％，萃取率为９９．１１％。     

铼（Ⅶ）－结晶紫－吐温20光度法研究

本工作提出用Ｔｗｅｅｎ－２０作为增敏剂，使Ｒｅ（Ⅶ）－结晶紫缔合物在水相增溶直接显色，不必用苯萃取，在６１５ｎｍ处的表观摩尔吸光系数达１．８９×１０５１·ｍｏｌｅ－１·ｃｍ－１．在酒石酸等隐蔽剂存在下，选择性好，可用于某些矿样中少量铼的测定．     

分光光度法测定乙醛催化剂中的钯含量

拟定了乙醛催化剂中钯的分析方法。用４－（２－吡啶偶氮）－间苯二酚作显色剂，在ｐＨ＝５．６０－９．００范围内与钯形成红色本合物，其最大吸收峰位于５０２ｎｍ处，表观魔鬼洋吸光系数为２．５２×１０＾４Ｌ．ｍｏｌ＾－１．ｃｍ＾－１。钯浓度在０－２．４μｇ／ｍＬ范围内等符合比尔定律。     

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．     

2-羟基-5-仲辛基-二苯甲酮肟与P507对钯的协同萃取

通过２－羟基－５－仲辛基－二苯甲酮肟（Ｎ６１０），与Ｐ５０７的氯仿溶液，从高氢酸介质中对钯协同萃取的研究，采用斜率法确定了萃合物的组成为：Ｐ５０７·Ｐｄ·Ｎ５１０。协萃反应平衡常数为１ｇ＾－ｋ１２＝１．７００，协同萃取配合的生成常数为＾－β１２＝３．５２。同时计算了协萃反应的热力学函数值。     

新显色剂meso—四（3—溴—4—羟基—5—甲氧基苯）卟啉分光光度法测定痕…

本研究了在混合表面活性剂ＳＤＢＳ和聚乙二醇辛基苯基醚（ＯＰ）共存下，ｍｅｓｏ－四（３－溴－４－羟基－５－甲氧基苯）卟啉Ｔ（ＢＨＭＯＰ）Ｐ与钯的湿色反应，并以该反应为基础建立了高灵敏度的痕量钯的光度分析法。钯与该显色剂形成１：２的配合物，其表观摩尔吸吸光系数在４２２ｎｍ处为１．２７×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１。钯量在０．０－１２μｇ／２５ｍｌ范围内服从比尔定律，本法用于合成样品中钯的测定     

N,N—二甲庚基乙酰胺萃取钯的研究

研究了Ｎ，Ｎ－二甲庚基乙酰胺从ＨＮＯ３体系高放废液中萃取钯的行为及规律，探讨了钯，Ｎ５０３，ＨＮＯ３浓度和ＨＬＷ中所含其他金属离子对Ｎ５０３萃取钯的影响，萃取剂辐照性能，并测定了萃合物组成和表观平衡常数。     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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