流动注射化学发光法测定异丙基肾上腺素

采用流动注射技术,研究了酸性条件下高锰酸钾与异丙基肾上腺素的化学发光行为,对影响化学发光强度的诸因素进行了实验和探讨,建立了流动注射化学发光法测定异丙基肾上腺素的新方法.方法的检出限为6×10-9g/mL,线性范围为2.0×10-8～1 0×10-5g/mL对4.0×10-7g/mL异丙基肾上腺素进行11次平行测定,相对标准偏差为1 5%.方法用于测定盐酸异丙基肾上腺素的含量,结果与药典标准方法相一致.     

流动注射化学发光测定维生素B6

基于维生素B6在碱性条件下对Luminol和KIO4的化学发光反应有很强的增敏作用,结合反向流动注射技术,建立了流动注射化学发光测定维生素B6的新方法。在优化条件下,维生素B6浓度在5.0×10-8～1.0×10-5g/mL范围内,与化学发光强度呈良好的线性关系,方法的检出限为1.3×10-8g/mL,对5.0×10-6g/mL维生素B6进行11次平行测定,方法的相对标准偏差为1.5%。该方法成功用于药剂中维生素B6含量的测定。     

高锰酸钾-硫代硫酸钠-延胡索乙素化学发光体系的研究

采用流动注射技术研究了酸性条件下 ,延胡索乙素与高锰酸钾和硫代硫酸钠的化学发光行为 ,对影响化学发光强度的诸因素进行了实验和探讨 ,建立了流动注射化学发光法测定延胡索乙素的新方法 .方法的检出限为 3× 10 - 8g/mL ,线性范围为 1.0× 10 - 7～ 8.0× 10 - 5g/mL ,对 4 .0×10 - 6g/mL延胡索乙素进行 11次平行测定 ,相对标准偏差为 1.6 % .方法用于药剂中延胡索乙素的测定 ,结果与药典标准方法测得值一致     

鲁米诺-铁氰化钾化学发光体系测定氯丙嗪

在碱性条件下,铁氰化钾氧化鲁米诺产生化学发光,氯丙嗪对该体系的化学发光有显著的增强作用.基于此,结合流动注射技术建立了测定氯丙嗪的化学发光新方法.该方法有很高的灵敏度,检测限为5 7×10-9g/mL(IUPAC),线性范围为1 0×10-8～1 0×10-6g/mL,对1 0×10-7g/mL氯丙嗪平行测定11次,其相对标准偏差为2 7%.     

流动注射化学发光法测定苯酚

本文采用流动注射技术,研究了高锰酸钾-苯酚体系的化学发光行为,对影响化学发光强度的诸因素进行了实验和探讨,建立了化学发光法测定苯酚的新方法.方法的检出限为3×10-7g/mL线性范围为1.0×10-6~1.0×10-4g/mL.对4.0×10-6g/mL的苯酚进行11次平行测定,得方法的相对标准偏差为1.5%.方法用于废水中苯酚含量的测定,结果与分光光度法测得值一致.     

反相流动注射化学发光法测定盐酸小檗碱

基于盐酸小檗碱抑制磷钼钒杂多酸氧化鲁米诺产生化学发光,结合流动注射分析技术,提出了一种测定盐酸小檗碱的新方法.盐酸小檗碱在1.0×10-7～1.0×10-4 g/mL浓度范围内与化学发光分析信号呈线性关系;检出限为4×10-8 g/mL;对5.0×10-6 g/mL的盐酸小檗碱进行11次连续测定,相对标准偏差为1.2%.该方法已成功地应用于盐酸黄连素片剂中盐酸小檗碱的测定.     

胶束增敏流动注射化学发光法测定头孢哌酮钠

基于在盐酸介质中 ,十二烷基苯磺酸钠 (SDBS)形成的胶束能增强高锰酸钾 头孢哌酮钠体系的化学发光这一现象 ,建立了一种简易、快速测定头孢哌酮钠的流动注射化学发光新方法 .在优化的实验条件下 ,头孢哌酮钠的线性范围为 0 0 1× 10 -6～ 15× 10 -6g/mL ,检出限为 3 9× 10 -9g/mL ,对 6 0× 10 -6g/mL的头孢哌酮钠进行11次平行测定 ,其RSD为 2 2 %.将本法用于合成样品及尿样中的头孢哌酮钠的测定 ,结果令人满意 .     

铁氰化钾化学发光体系测定盐酸肾上腺素

基于铁氰化钾可以在碱性条件下直接氧化盐酸肾上腺素产生化学发光这一现象,并结合流动注射技术建立了一种直接测定盐酸肾上腺素的流动注射化学发光新方法.该方法的线性范围在5 0×10-8～5 0×10-6g/mL,检出限为2 8×10-9g/mL(3σ).对5 0×10-7g/mL的盐酸肾上腺素连续11次测定的相对标准偏差为3 2%.该法已成功测定了注射液中的盐酸肾上腺素含量,结果令人满意.     

流动注射电化学发光法测定色氨酸

将恒电流电解法与流动注射技术相结合,在线电解定量产生不稳定化学发光试剂Mn(Ⅲ),基于Mn(Ⅲ)能直接氧化色氨酸产生化学发光,建立了流动注射电化学发光测定色氨酸的新方法。在优化的实验条件下,测定色氨酸的范围为1.0×10-6~1.0×10-4g/mL,相关系数为0.9996,方法的检出限为3.0×10-7g/mL,相对标准偏差r=2.2%(1.0×10-5g/mL,n=11)。     

测定叶酸的流动注射化学发光新方法

基于在甲酸存在下 ,叶酸与高锰酸钾在酸性介质中的直接化学发光反应 ,建立了测定叶酸的流动注射化学发光新方法 .该方法测定叶酸的线性范围为 5.0×1 0 - 8～ 5.0× 1 0 - 6g/mL ,检出限为 1 .4× 1 0 - 8g/mL ,相对标准偏差为 3 .2 % (5.0×1 0 - 7g/mL叶酸 ,n =1 1 ) .该方法已应用于叶酸片剂中叶酸含量的测定     

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.     

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.     

A computer generator for randomly layered structures

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

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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