金属锌离子对胆红素的荧光增强作用及其在胆红素分析中的应用

考察了Ｚｎ＾２＋对胆红素（Ｂｉｌｉｒｕｂｉｎ,ＢＲ）的ＮａＯＨ水溶液荧光性质的影响作用,探讨了在Ｚｎ＾２＋存在条件下ＢＲ的荧光分析方法,结果表明,在ＮａＯＨ溶液中,Ｚｎ＾２＋对ＢＲ具有明显的荧光增强作用,借此建立了Ｚｎ＾２＋丰承下ＢＲ的荧光分析方法,用１．２ｍｏｌ．Ｌ＾－１的ＮａＯＨ水溶液为介质,在ＣＢＲ：ｃＺｎ＾２＋＝１：１０条件下,ＢＲ的线性范围为０．２５～４０．００μｍｏｌ．Ｌ＾－１,检出限     

苯甲酸衍生物的Tb（Ⅲ）配合物中配体性质对Tb^3＋的超灵敏跃迁？…

测定了６个苯甲酸衍生物ＲＣ６Ｈ４ＣＯ２Ｈ（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）与铽Ｔｂ（Ⅲ）的二元配合物在３５０ｎｍ紫外光激发下的荧光光谱。结果表明,配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２〉Ｈ〉ｐ－ＮＨ２〉ｏ－ＯＨ〉ｍ－Ｃｌ〉ｏ－ＣＯＯＨ。并注意到,标志Ｔｂ＾３＋的超灵敏跃迁强度的量：蓝光（４９１ｎｍ）与绿光（５４５ｎｍ）的相对强度比（ＩＢ／Ｇ）与配体的酸常数ｐＫａ（Ｌ     

苯甲酸衍生物的Tb(Ⅲ)配合物中配体性质对Tb~(3+)的超灵敏跃迁的影响

测定了６个苯甲酸衍生物ＲＣ６Ｈ４ＣＯ２Ｈ（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）与铽Ｔｂ（Ⅲ）的二元配合物在３５０ｎｍ紫外光激发下的荧光光谱．结果表明，配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２＞Ｈ＞ｐ－ＮＨ２＞ｏ－ＯＨ＞ｍ－Ｃｌ＞ｏ－ＣＯＯＨ并注意到，标志Ｔｂ３＋的超灵敏跃迁强度的量：蓝光（４９１ｎｍ）与绿光（５４５ｎｍ）的相对强度比（ＩＢ／Ｇ）与配体的酸常数ｐＫａ（Ｌ）及配体的平均极化率α（Ｌ）之间有很好的相关性．定量地探讨了其结构与性能的关系，为进一步探索新型绿色发光材料提供了一定的科学依据．     

二苯乙烯荧光蓝—S荧光猝灭测定微量锌（II）

研究了二苯乙烯荧光蓝－Ｓ荧光猝灭测量微量锌（Ⅱ）的实验条件，在ｐＨ６．０的Ｈ３ＰＯ４－Ｈ３ＢＯ３－ＨＡｃ－ＮａＯＨ缓冲溶液中，试剂的最大激发波长λｅｘ＝３６７ｎｍ，最大荧光发射波长λｅｍ＝４５７ｎｍ；Ｚｎ（Ⅱ）与试剂生成的１：２的配合物使试剂的荧光强度减弱；利用荧光猝灭法测定微量锌（Ⅱ），线性范围为０￣０．８μｇ／１０ｍｌ；方法用于测量食品中、人发中的微量锌（Ⅱ），结果满意。     

[Na（DB18C6）（H2O）2]2W6O19的合成与晶体结构

有关文献报道了［Ｎａ（ＤＢ１８Ｃ６）ＣＨ３ＯＨ２］２Ｗ６Ｏ１９的合成与晶体结构．本文应用相同的反应物，选用不同的实验条件合成出了另一种新型冠醚多酸超分子配合物，并进行了ｘ四圆衍射测定．该晶体Ｃ４９Ｈ８２Ｗ６Ｎ２Ｎａ２Ｏ４０为四方型，空间群为Ｐｒ／ｍｂｍ，α＝１．７０９５（３）ｎｍ，Ｃ＝２．８２４３（５）ｎｍ，Ｖ＝８．２５４（２）ｎｍ３，Ｚ＝５４，Ｍｒ＝２４８８．３３，Ｄｘ＝２．０３５／ｃｍ３，μ＝９．５１ｃｍ－１，Ｆ（０００）＝４７０４．最后一致性因子为Ｒ＝０．０５４６和Ｒｗ＝０．０６３２．该配合物由［Ｎａ（ＤＢ１８Ｃ６）（Ｈ２Ｏ）２］＋与Ｗ６Ｏ１９通过静电作用而组成     

二苯乙烯荧光蓝-S荧光猝灭测定微量锌(Ⅱ)

研究了二苯乙烯荧光蓝－Ｓ荧光猝灭测定微量锌（Ⅱ）的实验条件．在ｐＨ６．０的Ｈ３ＰＯ４－Ｈ３ＢＯ３－ＨＡｃ－ＮａＯＨ缓冲溶液中，试剂的最大激发波长λｅｘ＝３６７ｎｍ，最大荧光发射波长λｅｍ＝４５７ｎｍ；Ｚｎ（Ⅱ）与试剂生成的１∶２的配合物使试剂的荧光强度减弱；利用荧光猝灭法测定微量锌（Ⅱ），线性范围为０～０．８μｇ／１０ｍｌ；方法用于测定食品中、人发中的微量锌（Ⅱ），结果满意．     

Cu~(2+)和声致荧光(英文)

实验发现：铜离子Ｃｕ２＋明显增强了Ｌｕｍｉｎｏｌ－ＮａＯＨ和Ｌｕｍｉｎｏｌ－Ｃａ（ＯＨ）２两种水溶液的声致荧光强度,并使它们的最大声致荧光峰分别发生了６ｎｍ和９ｎｍ的红移现象．但这种离子对Ｌｕｍｉｎｏｌ－Ｎａ２ＣＯ３水溶液的影响与上述相反,并对应发生了５ｎｍ的篮移现象．然而,Ｃｕ２＋对这３种溶液的声致荧光的发射波长均不构成严重影响．     

部分苯甲酸衍生物的Tb（Ⅲ）配合物的发光性质研究

测定了６个苯甲酸衍生物与铽Ｔｂ（Ⅲ）二元化合物Ｔｂ（ＲＣ６Ｈ４Ｃｏ２）３（Ｒ＝ｏ－ＮＨ２、Ｈ、ｐ－ＮＨ２、ｏ－ＯＨ、ｍ－Ｃｌ、ｏ－ＣＯＯＨ）的红外光谱、紫外吸收光谱和荧光光谱,结果表明,在３５０ｎｍ的紫外光激发下配合物的荧光强弱顺序为Ｒ＝ｏ－ＮＨ２〉Ｈ〉ｐ－ＮＨ２〉ｏ－ＯＨ〉ｍ－Ｃｌ〉ｏ－ＣＯＯＨ,并可看到,邻氨基苯甲酸铽配合物除了在本实验中荧光发射最强外,甚至比目前所报道的铽的无机发光材料的发光     

氯化磺B^3Π0^＋态的激光诱导荧光及碰撞动力学研究

研究了氯化碘的Ｂ＾３Π０＾＋态（振动能级Ｖ＇＝１２、１６）的发散荧光光谱和碰撞电子淬灭。借助激光诱地荧光的方法，以氩离子激光器的５０２．３ｎｍ和５１４．５ｎｍ谱线做为泵浦源，并使用稳态近似处理得到了这两个态与气态ＩＣｌ、Ｈ２Ｏ、ＣＨ２Ｃｌ２、ＣＨ３ＯＨ、Ｃ２Ｈ５ＯＨ、ＣＨ３ＮＨ２、Ｃ２Ｈ５ＮＨ２、ＣＣｌ４和苯分子碰撞的电子淬灭速率常数和碰撞截面。我们探讨了分子间的相互作用，并且对比了ＩＣｌ和ＩＦ的     

偶氮染料异方酸二酰胺与氟离子的显色体系

偶氮染料异方酸二酰胺（ＢＮＢＰＳ）在ＤＭＳＯ中与氟离子（水溶液）有良好的显色作用．显色剂与ＰＨ为３．８～８．０的Ｆ－试液反应，由紫红色迅速变为蓝色（△λ＝１０２ｎｍ），λｍａｘ＝６３２ｎｍ，４ｈ内吸光度值保持不变，摩尔吸光系数ε５３２＝１．７×１０４Ｌ·ｍｏｌ－１·ｃｍ－１．Ｆ－１浓度在０～５μｇ／１０ｍＬ范围内线性关系良好大量的Ｃｌ－，ＮＯ３，Ｋ＋和Ｎａ＋存在时，对其测定无干扰Ｂｒ－，Ｉ－，Ｆｅ３＋，Ａｌ３＋和Ｂａ２＋等离子的允许共存量较大．阳离子与显色剂无显色作用．     

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