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     

RP-HPLC分离测定β-胡萝卜素顺、反异构体

使用反相高效液相色谱法, Ｚｏｒｂａｘ　 Ｏ Ｄ Ｓ Ｃ１８ ２５０×４．６ ｍ ｍ ５ μｍ 色谱柱,流动相为甲醇∶乙腈∶石油醚（３５∶５５∶１０）,流速：１ ｍ Ｌ／ｍ ｉｎ,检测波长：４５０ ｎｍ ,建立 Ｒ Ｐ－ Ｈ Ｐ Ｌ Ｃ 分离测定 β－胡萝卜素顺、反异构体的方法．该方法在０．０１～１．０ ｍ ｇ／ｍ Ｌ 线性范围内峰响应值与其浓度呈良好的线性关系,ｒ＝ ０．９９９１．该方法可简便、准确分离检测 β－ 胡萝卜素顺、反异构体．     

水溶液中尼古丁电离常数的测定

以尼古丁－硅钨酸作活性物质,邻苯二甲酸二（２—乙基己）酯作增塑剂,Ａｇ／ＡｇＣｌ电极为内参比电极,构成ＰＶＣ 膜尼古丁选择性电极。在２０～５５ ℃范围内,电极对１．０ ｍ ｏｌ／Ｌ尼古丁溶液的响应电位随温度增加呈线性上升趋势,温度效应系数为１．０５ ｍ Ｖ／℃。当ｐＨ 为５～７ 时,电极对８．０×１０－ ５～１．０×１０－ １ ｍ ｏｌ／Ｌ 的尼古丁标准溶液具有良好的能斯特响应,工作直线斜率为５４ ｍ Ｖ／ｐＣ。通过调节试液２５ ℃时的ｐＨ 值在２．５～８．５ 范围内变化,测量１．０×１０－ ３ ｍ ｏｌ／Ｌ、１．０×１０－ ２ ｍ ｏｌ／Ｌ、１．０×１０－ １ｍ ｏｌ／Ｌ 的尼古丁标准溶液的电位,绘制ｐＨ－ｍ Ｖ 曲线并计算求得尼古丁在水溶液中的平均电离常数值。     

4,5-二溴邻硝基苯基荧光酮非离子表面活性剂分光光度法测定微量钼

研究了钼４，５二溴邻硝基荧光酮（ Ｂｒ Ｏ Ｎ Ｐ Ｅ）吐温４０ 显色体系的吸收光谱特性，在吐温４０ 存在下，钼（Ⅵ）与 Ｂｒ Ｏ Ｎ Ｐ Ｆ形成红色络合物．在 １．１～１．３ ｍ ｏｌ／ Ｌ 的盐酸介质中，络合物的吸收波长为 ５４０ ｍ ｍ ，摩尔吸光系数为 ９．５×１０４ Ｌ·ｍ ｏｌ·ｃｍ － １ ．钼（Ⅵ）的含量在 ０～１４ μｇ／２５ ｍ ｌ的范围内，符合比耳定律．多数常见阳离子不干扰显色反应．本法用于合金钢标样中的微量钼，获得了满意的结果．     

吸光度线性扩展法测定镨钕钐

用吸光度线性扩展法测定镨、钕、钐．基于待测元素特征吸收峰下的吸光度在纪录仪上线性放大，提高了测定的灵敏度、准确度，扩大了测定浓度范围．分别选用的最大吸收波长是：λＰｒ＝４４４．７ｎｍ，λＮｄ＝７９４．２ｎｍ，λＳｍ＝４０１．７ｎｍ；吸光度相应峰高和浓度呈线性关系的范围是：Ｐｒ３＋为（０．２０～８．６）×１０－６ｍｏｌ／Ｌ；Ｎｄ３＋为（０．２０～２．４）×１０－６ｍｏｌ／Ｌ；Ｓｍ为（０．２０～３．０）×１０－５ｍｏｌ／Ｌ．在选用１０ｃｍ比色皿时，测定灵敏度为：Ｐｒ３＋为１．１μｇ／ｍｌｍｍ，Ｎｄ３＋为０．２２μｇ／ｍｌｍｎ，Ｓｍ３＋为４．６μｇ／ｍｌｍｍ．待测元素与稀土杂质浓度比为５１时无干扰，１１时只有个别元素有一定干扰．     

铈(Ⅳ)-胱氨酸络合物的吸附伏安法应用

研究了铈（ Ⅳ） —胱氨酸络合物在硼砂底液中的吸附伏安特性．在０ ．０１ｍ ｏｌ／ Ｌ 的硼砂中,铈（ Ⅳ） —胱氨酸在－ ０ ．０６ Ｖ（ｖｓ ． Ｓ Ｃ Ｅ） 出现一灵敏的吸附还原峰,其峰高与胱氨酸在１ ．０ ×１０ － ９ ～１ ．０ ×１０ － ７ ｍ ｏｌ／ Ｌ 范围内成线性关系,检测下限为５ ．０ ×１０ － １０ ｍ ｏｌ／ Ｌ．应用该方法测定了样品中痕量的胱氨酸     

Meso-[四(对-三甲铵基)苯基]卟啉在核酸分子表面长距组装的荧光特性及分析应用

在低离子强度下，ｍｅｓｏ［四（对三甲铵基）苯基］卟啉（ＴＡＰＰ）能在核酸分子表面进行长距组装并诱导核酸超螺旋结构的形成．长距组装使得ＴＡＰＰ的Ｓｏｒｅｔ带发生减色效应，并使Ｓｏｒｅｔ带处激发产生的荧光被猝灭．体系离子强度（Ｉ）增大将降低ＴＡＰＰ长距组装的能力，导致荧光猝灭程度降低．在Ｉ＝０００４时，荧光猝灭程度与核酸的浓度成线性关系，可用于１５×１０－６～９０×１０－６ｍｏｌ／Ｌ的小牛胸腺ＤＮＡ，１５×１０－６～１０５×１０－６ｍｏｌ／Ｌ鱼精子ＤＮＡ和酵母ＲＮＡ的测定．     

钒(Ⅳ)与偶氮羧Ⅰ在水溶液中的显色反应及其应用

研究了偶氮羧Ⅰ与钒（Ⅳ）的显色反应及其应用．在ｐＨ５０～６５的醋酸醋酸钠缓冲溶液中，钒（Ⅳ）与偶氮羧Ⅰ形成红色的１∶１型配合物．该配合物的最大吸收波长为５８２ｎｍ，钒的浓度在０～３０μｇ／２５ｍｌ范围符合比尔定律，回归方程为Ａ＝００１０４４Ｃ０００４２７３，相关系数为ｒ＝０９９９８，表观摩尔吸光系数为１２８×１０４Ｌ·ｍｏｌ－１·ｃｍ－１．该方法简单、快速，有良好的重现性和选择性，可用于钢中钒的测定     

东莨菪碱PVC膜离子选择性电极的研究

用氢溴酸东莨菪碱－ 四苯硼离子缔合物为电活性物质,以邻苯二甲酸二丁酯为增塑剂,研制成 Ｐ Ｖ Ｃ为基质膜的东莨菪碱离子选择性电极。东莨菪碱浓度在１０×１０－ ４ｍ ｏｌ／ Ｌ～１０×１０－ ２ｍ ｏｌ／ Ｌ时,电极电位服从能斯特方程式, 响应斜率为５９０７ ｍ Ｖ／△ｐｃ, 检测下限为７９４×１０－ ５ ｍ ｏｌ／ Ｌ, 对东莨菪碱的回收率为９７９％ ～１０９２％ , 变异系数为０４５％ 。本文考察了电极的各种性能, 测定了２０种常见离子选择性系数。方法用于实际样品中东莨菪碱的测定, 与药典标准方法比较, 相对误差２８２％ , 结果满意     

几种芳烃衍生物型捕收剂的液相色谱分离和测定

报道了一种反相ＨＰＬＣ方法对几种芳烃衍生物型捕收剂的分离和测定．该法借助色谱柱ＬｉＣｈｒｏＣＡＲＴ１００ＲＰ１８（５μｍ）,流动相：甲醇－水－５％Ｈ３ＰＯ４－５％Ｈ２ＳＯ４（４５∶５５∶４∶０．５,体积分数）和紫外检测器在２８５ｎｍ波长下进行．在０．０００５～０．０１ｇ／Ｌ浓度范围内,方法的相对标准偏差为１．１％～２．４％．水杨羟肟,苯并三唑,水杨醛肟,水杨酸,铜铁灵等的检出限分别为１．０×１０－６,０．２×１０－６,１．０×１０－６,５．０×１０－６和６．０×１０－６ｇ／Ｌ,所研制的方法已应用于矿物浮选过程实际样品的分析．     

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.     

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.     

A computer generator for randomly layered structures

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

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.