2—〔3—（5硝基苯并异噻唑）偶氮〕—6—异丙基苯酚的合成,结构和…

以２－氰基－４硝基苯胺为原料合成了３－氨基－５－硝在－２，１－苯并异噻唑，并使之与邻惜内基苯酚偶联，得到２－〔３－（５－硝基苯并异噻唑）偶氮〕－６－异丙基苯酚（５－ＮＯ２－ＢＰＡＩＰ），测得其ｐＫａ为７．０８。光度法和ＰＨ滴定表明它有可能成为一个敏锐的酸碱指示剂和Ｃｕ＾２＋、Ｃｏ＾２＋、Ｎｉ＾２＋等离子的显色剂。     

2—[（2—氰基—4—硝基苯）偶氮]—6—异丙基苯酚的合成及其与金属离…

以２－氰基－４硝基苯胺为原料重氮化与２－异丙基苯酚偶联，合成了２－「（２－氰基－４－硝基苯）偶氮」－６－异丙基苯酚（２－ＣＮ－４ＮＯ２－ＢＡＩＰ）。测定了离解常数，研究了它与金属离子的显色反应。     

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．     

2－［（2－氰基－4－硝基苯）偶氮］－6－异丙基苯酚的合成及其与金属离子显色反应

以２－氰基－４硝基苯胺为原料重氨化与２－异丙基苯酚偶联，合成了２－［（２－氰基－４－硝基苯）偶氮］－６－异丙基苯酚（２—ＣＮ—４ＮＯ２—ＢＡＩＰ）。测定了离解常数，研究了它与金属离子的显色反应。     

S2O8^2—／ZrO2固体超强酸催化剂上的正丁烷异构化反应

首次制备Ｓ２Ｏ８＾２－／ＺｒＯ２固体超强酸,确证室温下它对正丁烷的反应活性比ＳＯ４＾２－／ＺｒＯ２固体超强酸更强,对ＺｒＯ２有促进作用的非卤素阴离子中,Ｓ２Ｏ８＾２－是最有侍焙烧温度是６００℃,比ＳＯ４＾２－／ＺｒＯ２体系低５０℃,且于３５℃时,下烷在Ｓ２Ｏ８＾２－／ＺｒＯ２体系上反应２０ｈ的转化率为５０．４％,而相同条件下的ＳＯ４＾２－／ＺｒＯ２体系上为３６．７％。由于Ｓ２Ｏ８＾２－／ＺｒＯ２（     

某些添加剂对Ti／PbO2电极上ClO4^—离子阳极形成过程的影响

本用分解极化曲线法研究了某些添加剂对Ｔｉ／ＰｂＯ２电极上ＣｌＯ４＾－离子阳极形成过程的影响，研究结果表明，Ｆ＾－，ＣｌＯ４＾－，ＢｒＯ３＾－，Ｂ４Ｏ７＾２－，Ｂａ＾２＋等离子均使ＣｌＯ４＾－的阳极形成电流效率提高，而Ｃｒ２Ｏ７＾２－，Ｓ２Ｏ８＾２－，ＳＯ４＾２－，ＭｏＯ４＾２－，ＩＯ４６－，Ｐ２Ｏ７＾４－，Ｆｅ（ＣＮ）６＾４－，Ｃａ＾２＋和Ｍｇ＾２＋等离子均使电流效率降低，根据假设的机理讨论了使     

中药路路通化学成分的研究（I）：一种新的五环三萜的结构测定

从生药路路通分离得到２个齐墩果烷骨架的五环三萜类化合物。通过＾１３Ｃ ＮＭＲ，ＤＥＰＴ，＾１Ｈ ＮＭＲ，２Ｄ＾１Ｈ－＾１３Ｃ ＣＯＳＹ，２Ｄ＾１Ｈ－＾１Ｈ ＣＯＳＹ，ＩＲ，ＭＳ和元素分析阐明了它们的结构。（１）为２α，３β－二羟基－２３－去甲－齐墩果－４（２４），１２（１３）－二烯－２８－羧酸，（２）为２α，３β，２３－三羟基齐墩果－１２（１３）－烯－２８－羧酸，（１）未见献报道，（２）是首次从     

2,4—二硝基五环[4.3.0.0^2.5.0^3,8.0^4,7]壬烷^1H和^13C…

利用＾１Ｈ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１ＨＣＯＳＹ，＾１３Ｃ－＾１Ｈ远程ＣＯＳＹ以及选择性远程ＤＥＰＴ＾１３ＣＮＭＲ谱，对２，４－二硝基五环［４．３．０．０＾２．５，０＾３．８．０＾４，７］壬烷的＾１Ｈ和＾１３ＮＭＲ谱进行了完全的归属。     

B—Z振荡反应的热动—电位法研究

在自组装的量热装置中，同步记录了ＫＢｒＯ３－ＣＨ２（ＣＯＯＨ）２１－Ｈ２ＳＯ４－Ｃｅ（ＮＯ３）３体系的热动和电位振荡曲线。实验结果表明，在［Ｃｅ＾４＋］／［Ｃｅ＾３＋］呈周期变化的同时，伴随吸热和放热过程交替进行。实验结果与按ＦＫＮ机理理论分析一致，吸热效应主要与Ｂｒ２Ｏ４离解为ＢｒＯ２有关，放热效应则与丙二酸的溴代及溴代产物的氧化胶有关。本工作成功地将量热计用于动态热热信号检测，为研究振荡反应建     

SO^2—4／ZrO2在重油催化裂化中的应用研究

对ＳＯ＾２－４／ＺｒＯ２超强酸体系作为重油催化裂化助剂进行了研究。结果表明,加入适量的ＳＯ＾２－４／ＺｒＯ２可提高轻质油收率,并能降低催化剂生焦;在工业催化裂化高温水蒸汽流化的条件下,ＳＯ＾２－４／ＺｒＯ２超强酸体系中的Ｂ酸对重油催化裂化起着至关重要的作用。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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