CPB存在下DSF与碲显色反应研究

在ＰＨ＝５．０ＨＡｃ－ＮａＡｃ缓冲介质中,溴化十六烷基吡啶（ＣＰＢ）存在下,Ｔｅ（ＩＶ）与过量的二磺基苯基荧光酮（ＤＳＦ）生成１：４稳定络合物,λｍａｘ＝５５５ｎｍ,ε＝１．３５＊１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,Ｔｅ（ＩＶ）在０－１０μｇ／２５ｍＬ内符合比尔定律。方法用于硒中微量碲的测定,结果令人满意。     

二溴羟基苯基荧光酮分光光度法测定微量锰的研究

研究了在表面活性剂溴化十六烷基三甲胺（ＣＴＭＡＢ）存在下,二溴烃基苯基荧光酮（ＤＢＨ－ＰＦ）分光光度法测定微量锰的最佳显色条件及应用,实验结果表明,在ｐＨ９．４～１０．１的硼砂－ＮａＯＨ缓冲溶液中,锰与ＤＢＨ－ＰＦ形成的１：２的配合物,其最大吸收波长λｍａｘ＝５９０ｎｍ,表观摩尔吸光系数为ε５９０＝１．５１×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１,锰含量在０～６μｇ／２５ｍｌ范围符合比定律,方法用于     

二苯乙烯荧光蓝S—荧光猝灭法测定茶叶中的微量铁（Ⅲ）

研究了二苯乙烯荧光蓝Ｓ－荧光猝灭测定微量铁（Ⅲ）的实验条件,在ｐＨ５．９的ＨＡｃ－ＮＨ４Ａｃ缓冲溶液中,试剂的最大激发波长λｅｘ＝３７０ｎｍ,最大荧光发射波长λｅｍ＝４５０ｎｍ,Ｆｅ（Ⅲ）与试剂生成的１：３的配合物使试剂的荧光经度减弱,利用荧光猝灭法测定微量铁（Ⅲ）线性范围为０～０．４μｇ／１０ｍｌ,方法用于测定茶叶中的微量铁（Ⅲ）结果满意。     

二溴羟基苯基荧光酮荧光熄灭法测定钛

本文用荧光熄灭法研究了二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）为指示剂测定Ｔｉ（Ⅳ）。在吐温－８０存在下，Ｔｉ（Ⅳ）与ＤＢＨ－ＰＦ形成１：２紫红色配合物，λｅｘ２＝５０２ｎｍ，λｅｍ＝５２２ｎｍ，检测限为４μｇ／Ｌ，线性范围为４～５６μｇ／Ｌ。该方法灵敏度高，选择性好，适用于检测合金钢及铝合金中的微量钛。     

铁(Ⅲ)-9-(3,5-二溴)水杨基荧光酮-溴化十六烷基三甲基铵显色体系的分光光度法研究及应用

研究了铁（Ⅲ）－９－（３,５－二溴）水杨基荧光酮－ＣＴＭＡＢ三元络合物的显色反应条件,在ｐＨ６．０～７．２的ＫＨ２ＰＯ４－ＮａＯＨ缓冲体系中,铁（Ⅲ）与９－（３,５－二溴）水杨基荧光酮形成１∶４的络合物,其最大吸收波长λｍａｘ＝５９０ｎｍ,表观摩尔吸光系数为１．７２×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,铁含量在０～６μｇ／２５ｍＬ范围内符合比耳定律．方法灵敏度高,选择性较好,络合物稳定,用于牛肝粉和茶叶中微量铁的测定,结果满意     

2,4—二碘基苯基荧光酮光度法测定工业己内酰胺中铁含量

在ｐＨ＝７０的ＮＨ４Ａｃ缓冲介质中,非离子型ＯＰ微乳液存在下,Ｆｅ（Ⅲ）和２,４－二碘基苯基荧光酮（ＤＳＦ）生成蓝色络合物,λｍａｘ＝６４０ｎｍ,ε＝１６２×１０５Ｌ·ｍｏＬ－１·ｃｍ－１,铁含量在０～５μｇ／２５ｍＬ内符合比尔定律,方法用于工业己内酰胺中铁的测定,结果满意     

铁（Ⅲ）—9—（3,5—二溴）水杨基荧光酮—溴化十六烷基三？…

研究了铁（Ⅲ）－９－（３,５－二溴）水杨基荧光酮－ＣＴＭＡＢ三元络合物的显色反应条件,在ＰＨ６．０－７．２的ＫＨ２ＰＯ４－ＮａＯＨ缓冲体系中,铁（Ⅲ）与９（３,５－二溴）水杨基荧光酮形成１：４的络合物,其最大吸收波长λｍａｘ＝５９０ｎｍ,表观魔鬼洋吸光系数为１．７２×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,铁含量在０－６μｇ／２５ｍＬ范围内符合比耳定律,方法灵敏度高,选择性较好,络合物稳定,用于牛肝     

锌—水杨基荧光酮—CTMAB体系荧光特性的研究及应用…

研究了锌－水杨基荧光酮（ＳＡＦ）－溴化十六烷基三甲胺（ＣＴＭＡＢ）体系的荧光特性。实验结果表明，在ｐＨ９．７５￣１０．３５的Ｈ３ＰＯ４－ＨＡｃ－Ｈ３ＢＯ３缓冲介质中，产生荧光熄灭程度最大的激发波长为λｅｘ＝５２４ｎｍ，荧光波长为λｅｍ＝５４９ｎｍ。当锌含量０￣２．４μｇ／２５ｍｌ范围内，荧光熄灭程度与浓度呈线性关系，藉以测定微量锌。方法简便，快速，稳定性高，可应用于食品及环境水样中微量锌的测定。     

锌-水杨基荧光酮-CTMAB体系荧光特性的研究及应用──食品中微量锌的快速测定

研究了锌－水杨基荧光酮（ＳＡＦ）－溴化十六烷基三甲胺（ＣＴＭＡＢ）体系的荧光特性．实验结果表明，在ｐＨ９．７５～１０．３５的Ｈ３ＰＯ４－ＨＡｃ－Ｈ３ＢＯ３缓冲介质中，产生荧光熄灭程度最大的激发波长为λｅｘ＝５２４ｎｍ，荧光波长为λｅｍ＝５４９ｎｍ．当锌含量０～２．４μｇ／２５ｍｌ范围内，荧光熄灭程度与浓度呈线性关系，藉以测定微量锌．方法简便，快速，稳定性高，可应用于食品及环境水样中微量锌的测定．     

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．     

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-