动力学光度法测定痕量铁的研究

本文研究了氨水介质中，痕量铁（Ⅲ）催化过氧化氢氧化罗丹明Ｂ褪色的新指示反应及其动力学条件，建立了动力学光度法测定痕量铁（Ⅲ）的新方法。方法的灵敏度为１．８２×１０￣（－１０）ｇＦｅ（Ⅲ）／ｍｌ，测定范围为０—０．８μｇＦｅ（Ⅲ）／２５ｍｌ。用于测定人发及水中痕量铁（Ⅲ），结果满意。     

煌焦油兰─过氧化氢体系催化光度法测痕量铁（Ⅲ）的研究

本文研究了在稀盐酸介质中，痕量铁（Ⅲ）对过氧化氢氧化煌焦油兰褪色指示反应的催化作用，建立了催化光度法测痕量铁（Ⅲ）的新方法．方法的线住范围为０—２μｇＦｅ（Ⅲ）／２５ｍｌ，检出限为３．２３×１０－１０ｇ／ｍｌ．方法用于人发中痕量铁（Ⅲ）的测定．     

催化光度法测定天然水中痕量铁

基于α，α＇－联吡啶作活化剂，在硫酸介质中，Ｆｅ（Ⅲ）催化过氧化氢氧化甲基红褪色的指示性反应，采用固定反应时间法建立了一种灵敏度较高的测定痕量Ｆｅ（Ⅲ）的方法，其灵敏度为２．６８×１０－１１μｇ／ｍＬ，线性范围为０～０．６μｇ／２５ｍＬ，用于水样中痕量铁的测定，回收率为９０％～１０６％，相对标准偏差为３．１３％。     

氨酸钾氧化番红花红T催化光度法测定痕量铁

研究了硫酸介质中，草酸存在下，痕量铁（Ⅲ）催化氯酸钾氧化番红花红Ｔ褪色的新指示反应及动力学条件，建立了动力学直接测定痕量Ｆｅ３＋的方法．方法的灵敏度为３．３×１０－１０Ｆｅ３＋／ｍｌ，测定范围０～０．４μｇ／ｍｌ，操作简便、快速．用于测定人发中的铁，结果满意．     

反相流动注射催化光度法测定痕量铁的研究

基于在丙三醇存在下，以邻菲罗啉作活化剂，铁（Ⅲ）对溴酸钾氧化维多利亚天蓝Ｂ褪色的催化作用，建立了痕量铁的反相流动注射分析（ｒＦＩＡ）新方法．方法的线性范围为０．０３～１．８０μｇ／ｍＬ铁（Ⅲ），对０．０５μｇ／ｍＬ铁（Ⅲ）平行测定１１次的相对标准偏差为１．５％，进样频率为１６ｓ／ｈ．方法可直接用于水样、工业盐酸等样品中痕量铁的测定，回收试验的回收率为９１％～１０５％．     

反相流动注射催化光度法测定痕量铁的研究

基于在丙三醇存在下，以邻菲罗啉作活化剂，铁（Ⅲ）姨溴酸钾氧化维多利亚天蓝Ｂ褪色的催化作用，建立了痕量铁的反相流动注射分析（ｒＦＩＡ）新方法，方法的一范围为０．０３－１．８０μｇ／ｍＬ，铁（Ⅲ），对０．０５μｇ／ｍＬ铁（Ⅲ）平行测定１１次的相对标准偏差为１．５％，进样频率为１６ｓ／ｈ方法可直接用于水样、工业盐酸等样品中痕量铁的测定，回收试验的回收率为９１－１０５％。     

新催化光度法测定痕量铁(Ⅲ)

基于硫酸介质中,抗坏血酸作活化剂,铁（Ⅲ）催经氯酸钾氧化鸡冠花红褪色的反应,建立了催化光度测定痕量铁（Ⅲ）的新方法,研究了影响反应速率的最佳条件．线性范围为０～０．１５ｍｇ／Ｌ,检出限为１．０×１０－５ｇ／Ｌ．应用于天然水及食品中铁的测定,结果满意     

催化动力学光度法测定痕量铋（Ⅲ）的研究

发现了痕量铋（Ⅲ）在氨性介质中能催化高碘酸钾与靛红之间的褪色反应，研究了反应的最优化条件和动力学参数，建立了测定痕量铋（Ⅲ）的新方法。方法的最低检测限为４．９×１０＾－１２ｇ Ｂｉ（Ⅲ）／ｍＬ，检测范围为０．００３￣０．２００μｇ Ｂｉ（Ⅲ）／２５ｍＬ，用于测定人发及其它生物样品中痕量铋（Ⅲ），获得了满意结果。     

动力学抑制光度法测定痕量铁

在ｐＨ８．３的硼酸－氢氧化钠缓冲溶液中，Ｆｅ（Ⅲ）对过氧化氢氧化罗丹明Ｂ的褪色反应有阻抑作用．据此，本文以固定时间法对反应条件进行了选择，建立了动力学光度法测定痕量铁的新方法．可测范围：０～０．０４ｍｇ／Ｌ，灵敏度：９．２０×１０－７ｇ／Ｌ，用于试剂级盐酸和硝酸中微量铁的测定，相对标准偏差分别为６．０％和５．３％，平均加标回收率为９７．３％和９７．５％     

胶束混配络合物的研究:铁(Ⅲ)-磺基水扬酸-间硝基苯基荧光酮-吐温-80体系的显色反应

研究了Ｆｅ（Ⅲ）－磺基水扬酸－间硝基苯基荧光酮－吐温－８０ 体系的显色反应条件,在ｐＨ８．８～１０．８ 的氨性介质中,络合物的λｍ ａｘ ＝ ６０５ ｎｍ ,ε＝ １．４０×１０５ Ｌ·ｍ ｏｌ－ １ ·ｃｍ － １ ,稳定时间为２ ｈ,络合比为Ｆｅ（Ⅲ）∶Ｓａｌ∶ｍ －ＮＰＦ＝ １∶１∶２,Ｆｅ（Ⅲ）在０～７．０ μｇ／２５ ｍ Ｌ范围内呈线性关系,检出限为０．０２×１０－ ６ ,方法简便,再现性好,灵敏度高,在掩蔽剂存在下可不经分离直接测定牛肝粉和大米标样中的微量铁     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-