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     

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%.     

电生次氯酸根动注射化学发光法测定硝普钠

将恒电流电解产生ClO-与流动注射化学发光分析法相结合,基于硝普钠对ClO--Luminol体系化学发光的抑制作用,建立了测定硝普钠流动注射化学发光新分析方法.该法具有简单、快捷、灵敏的特点.在硝普钠浓度为8×10-6g/mL-1×10-4g/mL范围内呈线性关系.检出限为4×10-6g/mL相对标准偏差为1. 7%(2×10-5g/mL,n=9),对注射用硝普钠的测定及标准加入回收实验结果令人满意.     

Ru(phen)_3~(2+)-SO_3~(2-)-Ce(IV)体系化学发光法测定葡萄酒中的亚硫酸盐总量

提出了Ru(phen) 3 2 + -SO3 2 --Ce(IV)体系化学发光法测定溶液中亚硫酸盐的方法 SO3 2 -浓度与化学发光强度在 1 0× 10 -7～ 1 0× 10 -4mol/L范围内成正比 ,检出限为 1 97× 10 -7mol/L(S/N =3) ,1 0× 10 -4mol/LSO3 2 -溶液重复 6次测定结果的相对标准偏差为 4 9% 该方法用于测定白葡萄酒中亚硫酸盐总含量为 4 0 0 6× 10 -5mol/L ,加标回收结果令人满意     

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.     

铁氰化钾-罗丹明6G化学发光体系测定维脑路通

铁氰化钾在碱性条件下能氧化维脑路通产生微弱化学发光,罗丹明6G能大大增强此发光.基于此,建立了一种直接测定维脑路通的流动注射化学发光方法.该方法线性范围为5 0×10-7～5 0×10-5g/mL,检出限为1 0×10-7g/mL,对1 0×10-6g/mL维脑路通溶液连续11次测量的相对标准偏差为2 5%.利用该方法对维脑路通注射液及片剂含量的测定,结果令人满意.     

高效液相色谱-抑制化学发光法检测药物中的扑热息痛

基于扑热息痛对鲁米诺铁氰化钾化学发光体系的抑制作用,采用HypersilC18色谱柱分离、抑制化学发光法检测了药物中的扑热息痛含量.扑热息痛浓度在8 0×10-7～1 6×10-5g/mL范围内与化学发光强度呈良好的线性关系,检测限(3σ)为7 4×10-8g/mL,方法的相对标准偏差为3 4%.该方法已成功应用于扑热息痛片、散利痛和维C银翘片中扑热息痛含量的测定.     

流动注射示差动力学化学发光法同时测定硅和磷

根据硅钼杂多酸和磷钼杂多酸能直接氧化Luminol产生化学发光 ,但两种杂多酸在相同条件时的形成速率有明显差异的特性 ,采用流动注射示差动力学分析技术 ,在硅、磷共存时 ,不经分离 ,实现对合成水样中硅和磷的同时测定 .该法测定硅、磷的检出限分别为 3 2× 1 0 -8g/mL和 6 0× 1 0 -8g/mL ;线性范围为 1 0× 1 0 -7～ 1 0× 1 0 -5g/mL和 2 0× 1 0 -7～ 8 0× 1 0 -6g/mL .相对标准偏差为 2 .8%和 3.6% .     

NBS-荧光素-CTAC流动注射化学发光体系测定尿素的含量

报道了NBS 荧光素 CTAC流动注射化学发光体系测定尿素含量的分析方法 .在碱性条件下 ,荧光素作为能量转移剂 ,N 溴代丁二酰亚胺 (NBS)氧化尿素产生化学发光 ,十六烷基三甲基氯化铵 (CTAC)对该体系具有强烈的增敏作用 .研究了影响化学发光的各种因素 ,对可能的机理进行了探讨 .化学发光信号与尿素的质量体积浓度在 9× 10 -9～ 1× 10 -4g/mL范围内呈线性关系 .方法的相对标准偏差RSD值为 4 .6 % (5× 10 -8g/mL ,n =11) ,检出限 (3σ)为 3.0× 10 -9g/mL .本法已经成功地运用于人体尿液中尿素含量的测定 .     

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 .     

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…     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.