新型化学发光铁传感器的研究

利用镀铜的锌粒在线微还原柱还原Ｆｅ３＋成Ｆｅ２＋,与从固定在Ｄ２０１型阴离子交换树脂上洗脱下来的鲁米诺（Ｌｍ）及空气中的氧直接发生化学发光反应,设计出一种简便、快速、灵敏度高的新型Ｆｅ３＋化学发光传感器．Ｆｅ３＋传感器的线性响应范围为４０×１０－９～２０×１０－６ｇ／ｍｌ,相对标准偏差为２０３％（ｎ＝１１）,检测限为１０２×１０－９ｇ／ｍｌ．固定化的鲁米诺柱及Ｚｎ－Ｃｕ微还原柱可连续使用２００次以上．用该传感器可以测定饮用水．合成水样中铁的含量．     

流动注射化学发光法测定还原型辅酶Ⅰ

将还原型辅酶Ⅰ（ＮＡＤＨ）还原Ｆｅ３＋生成Ｆｅ２＋的化学反应与Ｆｅ２＋催化溶解氧氧化Ｌｕｍｉｎｏｌ的化学发光反应相偶合,同时采用试剂固定化技术将体系中的分析试剂Ｆｅ３＋及Ｌｕｍｉｎｏｌ全部电价固定在离子交换柱中,建立了一种测定还原型辅酶Ⅰ的流动注射化学发光新方法．该法对于ＮＡＤＨ响应的线性范围为１．０×１０－７～１．０×１０－４ｍｏｌ／Ｌ,检出限为５．５×１０－８ｍｏｌ／Ｌ,相对标准偏差小于５％（１．０×１０－７ｍｏｌ／Ｌ,ｎ＝７）．     

I_3~－和Fe~（3＋）浓度的紫外测定及其在催化反应中的作用

该文测定了Ｉ_３~－在０．０１ｍｏｌ·ｄｍ（－３）ＨＣｌ＋０．１ｍｏｌ·ｄｍ（－３）ＫＩ溶液中的消光系数和［Ｆｅ（ＢｉＰｙ）３］（２＋）在０．３ｍｏｌ·ｄｍ（－３）ＮａＡｃ溶液中的消光系数，其实验值与在其它介质中的相同。并研究了消光系数在（Ｔ１（３＋）＋Ｆｅ（２＋））和（Ｔｉ（３＋）＋Ｉ_３~－）两个催化反应体系中的应用。     

溴离子在铂电极上的电化学反应

用电位扫描和环盘电极等方法研究酸性介质中溴离子在铂电极上的多步氧化反应行为，证实在１．１Ｖ电位处发生的反应是：Ｂｒ－－ｅＢｒａｄ，（１）Ｂｒａｄ＋ＢｒａｄＢｒ２（ａｑ）．（２）在电位１．５Ｖ处发生的反应是：Ｂｒ２（ａｑ）Ｂｒａｄ＋Ｂｒａｄ，（２′）Ｂｒａｄ＋Ｈ２Ｏ－ｅ＝ＨＯＢｒ＋Ｈ＋．（３）其中反应（１）具有典型的可逆性．实验测得Ｂｒ－离子的扩散系数为１．８×１０－５ｃｍ２·ｓ－１，反应（１）的标准速率常数为２．０×１０－３ｃｍ·ｓ－１．     

球形催化剂中钙的测定

本文利用钙离子选择性电极的高选择性，建立了在大量Ｆｅ￣（３＋）存在下测定钙的新分析方法。该法仪器简单、操作方便、快速，电极响应范围为Ｃａ￣（２＋）浓度在１．００Ｘ１０￣（－４）～１．００Ｘ１０￣（－２）ｍｏｌ．Ｌ￣（－１）之间，检测限为８．０Ｘ１０￣（－７）ｍｏｌ．Ｌ￣（－１）。对球形催化剂中钙的测定，回收率为８６．ｏ％～８９．ｏ％，ＲＳＤ为０．９０９％和１．０３％     

非对称水溶性卟啉与钯（II）显色反应的光度法研究

研究了非对称性５，１０，１５－三（４－甲基－３－磺基苯）－２０－［４－（５－氟尿嘧啶）－３－磺基苯］卟啉（ＭＦｕＳＰＰ）测钯的显色条件，在表面活性剂十二烷基磺酸钠存在下，ｐＨ４．５￣６．０的弱酸性ＨＡｃ￣ＮａＡｃ缓冲介质中，用抗坏血酸催化，Ｐｄ（Ⅱ）与ＭＦｕＳＰＰ形成１：１配合物，最大吸收波长４１５ｎｍ，摩尔吸光系数ε＝１．８×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，线性范围０￣２．０μｇ／１０ｍｌ     

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．     

铅（II）－1－［（5－溴－2－吡啶）偶氮］－2，7－萘二酚－吐温－80体系光度法测定铅的研究

研究了在吐温－８０存在下，铅（ＩＩ）与合成的１－［（５－溴－２－吡啶）偶氮］－２，７－萘二酚（简称５－Ｂｒ－ＰＡＤＮ）的显色条件和光度特性。非离子表面活性剂吐温－８０主要起增溶作用。显色反应在５０℃时１０ｍｉｎ内即可完成，配合物在ｐＨ３．０～６．０之间的吸光度大而稳定，最大吸收波长λｍａｘ＝５９０ｎｍ，摩尔吸光系数ε＿（５９０）＝８．３１×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）．Ｐｂ￣（２＋）含量在０～２０μｇ·（２５×１０￣（－３）Ｌ）￣（－１）范围内遵守比尔定律。拟定方法的选择性较好，已用于树叶表面上和人发中铅的测定，获满意结果。     

稀土金属镱及钇苦味酸盐与苯并15冠5配合物的晶体和分子结构

标题化合物Ｙｂ（Ｐｉ）＿３（Ｂｌ５Ｃ５）＿２·２Ｈ＿２Ｏ·ＣＨ＿３ＣＮ（Ｉ）及Ｙ（Ｐｉ）＿３（Ｂｌ５Ｃ５）＿２·２Ｈ＿２Ｏ·ＣＨ＿３ＣＮ（Ⅱ）为同晶结构，均为３斜晶系，空间群为Ｐ－对晶体（Ｉ），ａ＝１２．７５３（１）Ａ，ｂ＝１３．８１０（２）Ａ．ｃ＝１９．６０９（２）Ａ，α＝８１．３７（３）°，β＝７１．５８（３）°，γ＝７０．７１（２）°，Ｚ＝２．Ｄ＿ｃ＝１．４６８ｇ·ｃｍ￣（－３），μ＝１５．９２８ｃｍ￣（－１）（ＭｏＫα），Ｍ＿ｒ＝１４７１，０４，Ｆ（０００）＝７４５，Ｒ＝０．０３１，Ｒ＿ｗ＝０．０３９；对晶体（Ⅱ），α＝１２．７８５（１）Ａ，ｂ＝１３．８５０（３）Ａ，ｃ＝１９．５７１（２）Ａ，α＝８１．０５（３）°，β＝７０．９２（２）°，γ＝７０．６２（３）°，Ｚ＝２，Ｄｃ＝ｌ．４８５ｇ·ｃｍ￣（－３），μ＝１０．４４１ｃｍ￣（－１）（ＭｏＫα），Ｍ＿ｒ＝１３８６．９ｌ，Ｆ（０００）＝７ｌ４，Ｒ＝０．０６５，Ｒ＿ｗ＝０．０７８．测定结果表明，中心稀土离子Ｙｂ￣（３＋）（或Ｙ￣（３＋）直接与３个苦味酸阴离子和２个水分子配位，此水化镱（或钇）苦味酸盐通过水桥氢键与冠醚Ｂｌ５Ｃ５相联而形成一个大的疏水性     

新安江水库太湖新银鱼Neosalanx taihuensis Chen生长特性的初步研究

对生活在新安江水库的太湖新银鱼进行了生长测算，并测定了各体长组的肥满度，结果如下：（１）体长和体重的相关关系Ｗ＝３．４３２×ｌ０￣（－６）Ｌ￣（３．０５６）（ｒ＝０．９９８），（２）体长和体重的生长方程分别为Ｌ＿ｔ＝８０［１－ｅ￣（－０．１２４（ｔ＋０．１９８）］￣3和Ｗ＿ｔ＝２．２５［１－ｅ￣（－０．１２４（ｔ＋０．１９８）］￣３；（３）拐点年龄为８．８１月龄；（４）体长增长以１～２月龄最大，体重增长以８～１０月龄最快；（５）体长５５～６０ｍｍ的鱼肥满度最大。     

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.     

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.     

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     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the