环烷酸咪唑啉硼酸酯的合成及缓蚀性能研究

环烷酸和羟乙基乙二胺经两步缩合脱水反应生成咪唑啉中间体.再以甲苯为携水剂,用硼酸与该中间体制得环烷酸咪唑啉硼酸酯(NIB),用红外光谱对产品进行了表征.采用静态挂片法对NIB在酸性溶液中的缓蚀性能进行评价.实验结果表明:NIB在酸性溶液中对碳钢挂片、铝挂片、不锈钢具有良好的缓蚀效果.电化学极化曲线得到的结果与失重法定结果一致.NIB缓蚀率随温度先升高后降低;随时间延长缓蚀率先升高后降低.     

呋喃甲酰-2-咪唑啉酮胺的合成

介绍了一类新型结构的拟除虫菊酯中间体的合成．其合成路线是以糠醛为起始原料,经过氧化、酰基化后得呋喃甲酰氯,后者再与2-咪唑啉酮反应得到呋喃甲酰-2-咪唑啉酮胺．     

月桂咪唑啉的合成及其硼酸衍生物反应条件的探讨

以月桂酸，β－羟乙基乙二胺合成了月桂咪唑啉，阐述了反应原理，并对其硼酸衍生物的反应条件进行了探讨。     

N-苯甲酰咪唑啉酮的合成

介绍了一种拟除虫菊酯中间体——N-苯甲酰咪唑啉酮的合成,它可通过苯甲酸酰基化后再与咪唑啉酮进行取代反应制得,通过实验选择了最佳合成条件并对产物结构进行了分析.     

咪唑啉类缓蚀剂在不同条件下的水解研究

合成了一种油酸基咪唑啉类缓蚀剂,用紫外-可见分光光度法测定其最佳吸收波长为232 nm。根据咪唑啉在水解过程中最佳吸收波长处的吸光度值会发生变化的现象,研究咪唑啉类缓蚀剂在不同温度、不同pH和不同浓度条件下随时间的水解过程变化。实验结果表明：随着温度升高,咪唑啉水解速率加快,水解程度增大;酸性环境抑制咪唑啉的水解,而碱性环境则加速咪唑啉的水解;低浓度时咪唑啉水解速率较快,浓度对水解程度的影响不大。红外分析得到的结果证实了在高温碱性环境中8 h后咪唑啉已经完全水解为酰胺。     

单睛六甲基—N—（3—咪唑基—1）丙基酰胺钴啉酯高氯酸盐的合成

维生素Ｂ１２（ＶＢ１２）衍生物,二睛六甲基－Ｎ－（３－咪唑基－１）丙基酰胺钴啉酯３ｂ－３ｆ,在Ｎ２存在下,与乙酸作用,用含高氯酸钠的磷酸盐缓冲溶处理,环合得到了五个相应的钴啉环ｂ、ｃ、ｄ、ｅ和ｆ侧链氮原子与钴原子配位的单睛六甲基－Ｎ－（３－咪唑基－１）丙基酰胺钴啉酯高氯酸盐４ｂ－４ｆ。产物结构经ＵＶ／ＶＩＳ、＾１Ｈ－ＨＭＲ和＾１３Ｃ－ＮＭＲ分析确认。     

酸化缓蚀剂与表面活性剂的协同效应评价

采用静态挂片法对咪唑啉型缓蚀剂与表面活性剂的缓释协同效应进行了评价.结果表明:实验温度为70℃,表面活性剂与咪唑啉型缓蚀剂复配,对碳钢的缓释效果优于单独使用咪唑啉型缓蚀剂,缓释性能得到进一步提高,可以满足油田酸化作业要求.     

有机硼酸酯添加剂的水解稳定性及摩擦特性

有机硼酸酯作为新型多功能润滑油添加剂受到广泛重视。但硼酸酯易水解,使其在实际应用中受到限制。为此,从分子设计出发,合成了几类含Ｎ 或Ｏ 的内配位硼酸酯,用３ 种方法测定其水解稳定性,并与普通硼酸酯及外配位硼酸酯相比较,总结了硼酸酯的水解规律,实验结果表明,含氮配位硼酸酯的水解稳定性大大高于不含氮的普通硼酸酯和含受阻酚基团的硼酸酯;而内配位硼酸酯的水解稳定性明显好于外配位硼酸酯。同时,摩擦试验表明,含氮硼酸酯的减摩、抗磨性比普通硼酸酯有明显改善。     

烷基咪唑啉中间体合成的最佳反应条件的研究

以不同的方法，合成烷基咪唑啉中间体，通过红外光谱与熔点测定确定咪唑啉中间体的结构，通过萃取分光光度法测定咪唑啉中间体的含量，利用正交试验，优化出最佳工艺条件，讨论了反应条件对烷基咪唑啉收率的影响。     

2-取代咪唑啉衍生物的合成

本文探讨了2-取代咪唑啉衍生物的三种合成方法。其中苯硫脲和二氯异氰酸苯酯路线,对2,6-二取代苯胺的收率仅40％,且有甲硫醇、二氧化硫等毒气放出。咪唑烷酮路线,不仅收率高达70％以上,而且对环境友好。建议生产厂家采用咪唑烷酮路线合成2-取代咪唑衍生物。     

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