烷基磷类萃取剂萃取苯酚的平衡

在298±1K 条件下考察 TOPO(TPhPO,TBP,HEH[EHP],HDEHP)—煤油(苯,氯仿)—0.100mol·L~(-1)NaCl 体系对笨酚的萃取平衡。结果表明,苯酚在稀释剂/0.100m01·L~(-1)NaCl 体系中的物理分配性能为苯氯仿>煤油;对于同一种稀释剂,苹取效果为 TOPO>TPhPO>TBP>HEH[EHP]>HDEHP;对于同一种萃取剂,稀释剂的影响为苯>煤油>氯仿(TOPO,TPhPO,TBP)和苯氯仿>煤油(HEH[EPH],HDEHP)。     

萃取-反萃取以提取酸溶液中的镓

以磷酸三丁酯为萃取剂,NH4Cl为反萃剂,系统探究了不同萃取环境下萃取和反萃取效果,实验结果表明,在6 mol/L的盐酸体系中,将体积分数为30%的TBP,按1∶1的相比,震荡6 min以萃取25 mg/L的镓溶液,萃取率达98.61%~98.69%,硫酸-氯化钠体系也可实现良好的萃取效果,此外还考虑了其他离子的干扰作用。而在pH=5.5,反萃取剂浓度为2.5 mol/L,反相比为2∶1的条件下,反萃取率可达100%,优化了萃取-反萃取条件,实现了镓的高效回收。     

萃取新技术在食品工业中的应用

作为新的萃取技术，超临界流体萃取、微波萃取、双水相萃取具有许多优点．介绍了这几种萃取技术的机理，综述了其在食品工业中的应用，讨论了它们的工业化应用前景及存在的问题，以期加速其在食品工业中的应用．     

超临界流体萃取固态物料的缩芯萃取模型

对超临界流本萃取固态物料进行了萃取机理分析，建立了超临界流体萃取固态物料的萃限模型，给出了宏观萃取速率表达式，提出了验证实验方案。     

磺酰胺类萃取剂对钴,镍的萃取性能

合成了２－噻唑和２－苯并噻唑研究表明，这两种萃取剂在一定的条件下，能有效地萃取钴和镍，同时，采用斜率法探讨它们对钴和镍的萃取机理。     

新型磺酰胺萃取剂对镍离子的萃取性能

合成了一种新型萃取剂，2－十二烷基苯磺酰胺喹啉（萃取剂I），研究了它和2－十二烷基苯磺酰胺噻唑（萃取剂Ⅱ）的萃取性能，研究表明，这两种萃取剂在一定的条件下，能有效地萃取NI^2 离子，同时采用斜率法探讨了它们对Ni^2 离子的萃取机理。     

磺酰胺类萃取剂对锌,镉的萃取性能

研究了２－（十二烷基苯磺酰胺）噻唑和２－（十二烷基苯磺酰胺）苯并噻唑萃取锌，镉的行为，研究表明，这两种萃取剂在一定的条件下，能有效地萃取锌（ＩＩ）和镉（ＩＩ）并采用斜率法探讨了它们以锌（ＩＩ）和镉（ＩＩ）的萃取机理。     

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