Ce(Ⅳ)-RhB-盐酸吡硫醇化学发光体系的研究

研究发现,在酸性介质中,Ce(Ⅳ)可以氧化盐酸吡硫醇产生较弱的化学发光,罗丹明B可以大大增强此发光,且增加的发光强度与盐酸吡硫醇的质量浓度在0.1～10 mg·L-1范围内呈良好的线性关系,由此建立了测定盐酸吡硫醇的流动注射化学发光新方法.对3 mg/L的盐酸吡硫醇连续平行测定11次,其相对标准偏差为2.8%,根据IUPAC建议,计算出该法的检出限为54μg/L(3σ).该法已成功测定了盐酸吡硫醇片剂和针剂中盐酸吡硫醇含量,结果令人满意.     

刚果红-分光光度法测定盐酸吡硫醇的含量

在缓冲液HAc-NaAc(pH=3.85)中盐酸吡硫醇可与刚果红络合生成颜色与刚果红不同的络合物,且络合物在576nm处有最大吸收,基于此建立了测定盐酸吡硫醇含量的新方法.盐酸吡硫醇浓度在0.1～45mg.L-1范围内与吸光度呈现良好的线性关系.回归方程为ΔA=0.00 618+0.02 216C(mg.L-1),线性相关系数R=0.999 7,检出限为0.03mg.L-1.该方法简便、快速、选择性好、灵敏度高,用于药物中盐酸吡硫醇的测定,测定结果与药典方法一致.     

光谱法研究Cu(Ⅱ)-核固红-盐酸吡硫醇体系及其分析应用

在弱酸性条件下,核固红,Cu(Ⅱ)与盐酸吡硫醇共存时,导致体系共振光散射强度明显增强.据此建立了测定盐酸吡硫醇的共振光散射分析法.在最佳条件下,Cu(Ⅱ)-核固红-盐酸吡硫醇体系的最大散射峰位于364nm处.共振光散射增强的程度与盐酸吡硫醇的浓度在0.5～11.5μg.mL-1之间呈良好的线性关系.方法的检出限为1.5×10-2μg.mL-1.将方法用于片剂中盐酸吡硫醇的测定,并与药典法进行对照,经t检验证明2种方法无显著性差异.     

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.     

鲁米诺-铁氰化钾化学发光法测定盐酸肼屈嗪

在碱性条件下,盐酸肼屈嗪对鲁米诺-铁氰化钾化学发光体系有强烈的增敏作用.结合流动注射技术,建立了流动注射化学发光测定盐酸肼屈嗪的新方法.在优化的实验条件下,测定盐酸肼屈嗪的线性范围为2.0×10-8 mol/L～1.0×10-6 mol/L,检出限为4×10-9 mol/L,对于浓度为6.0×10-7 mol/L的盐酸肼屈嗪连续测定11次,测定值的相对标准偏差为1.6%,以片剂为基体,用标准加入法检验方法的回收率,测得结果为99.1%～100.8%.该方法用于盐酸肼屈嗪片剂中盐酸肼屈嗪的定量分析,结果满意.     

化学发光法测定盐酸托莫西汀含量

在酸性介质中,根据盐酸托莫西汀对KIO4-H3PO4-H2O2的化学发光的增敏作用,建立了流动注射化学发光测定盐酸托莫西汀的新方法.该法的化学发光增敏值△I与盐酸托莫西汀的质量浓度在9.0×10–8~7.0×10–6g·m L–1范围内呈良好线性关系,检出限为1.0×10–8g·m L–1.结合固相萃取样品前处理技术,该方法被成功用于血浆及尿样中盐酸托莫西汀的测定.     

鲁米诺—高碘酸钾化学发光法测定盐酸苯乙双胍

在碱性条件下盐酸苯乙双胍对鲁米诺—高碘酸钾化学发光体系有强烈的增敏作用,结合流动注射技术,建立了流动注射化学发光测定盐酸苯乙双胍的新方法.在优化的实验条件下,测定盐酸苯乙双胍的线性范围为4.0×10-9~2.0×10-5 mol/L,检出限为6×10-10 mol/L,对于浓度为4.0×10-8 mol/L的盐酸苯乙双胍连续测定11次,测定值的相对标准偏差为1.1%,以片剂为基体,用标准加入法检验方法的回收率,测得结果在99.6%~100.5%之间.该方法用于盐酸苯乙双胍片剂中盐酸苯乙双胍的定量分析,结果满意     

在线电生Mn（Ⅲ）流动注射化学发光法测定盐酸氯丙嗪

将恒电流电解产生Mn(Ⅲ)与流动注射化学发光法结合,基于盐酸氯丙嗪可被Mn(Ⅲ)氧化直接产生化学发光且发光强度与其浓度在一定范围内呈线性关系,从而建立了测定盐酸氯丙嗪的流动注射化学发光新方法.该法在盐酸氯丙嗪的浓度为2×10-7g/ml～1×10-4g/ml范围内呈线性关系,检测限为8×10-8g/ml.相对标准偏差为1.8%(n=11,1×10-6g/ml).该法具有简便、快速、重现性好等特点.成功地应用于片剂中盐酸氯丙嗪的测定.     

高锰酸钾-连二亚硫酸钠-呋塞米化学发光体系的研究

为提高测定药品中呋塞米含量的灵敏度和降低分析成本,提出了一种测定呋塞米的流动注射化学发光新方法.方法基于高锰酸钾氧化连二亚硫酸钠产生较弱的化学发光,在一定浓度范围内,呋塞米可以大大增强此发光的原理.该法的检出限为5.7μg/L(IUPAC),线性范围为0.01-5.0 mg/L,对0.5 mg/L呋塞米平行测定11次,其相对标准偏差为3.7%.该法已成功用于针剂中呋塞米含量的测定,结果令人满意.     

流动注射化学发光法测定啤酒中的单宁酸

基于在甲醛存在条件下，酸性介质中，高锰酸钾氧化单宁酸产生较强的化学发光反应，结合流动注射技术，建立了单 宁酸的流动注射化学发光测定方法。该法的化学发光强度在单宁酸的浓度为8． 0×10~(-8) ～5． 0×10~(-6) mol/L 范围内呈良好的线 性关系，检出限为5． 0×10~(-8) mol／L(S/N=3) ，测定的相对标准偏差为2． 7％(N=11) 。该法用于测定几种啤酒中微量的单宁酸 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)

正~~     

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).     

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.     

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.