二溴荧光素荧光动力学分析法测定痕量钴

对二溴荧光素-过氧化氢氧化还原体系进行了催化动力学荧光的研究,发现在pH=12.0的硼砂-氢氧化钠缓冲溶液中,钴(Ⅱ)离子能催化过氧化氢氧化二溴荧光素而使其荧光强度降低.在此基础上建立了快速、灵敏、简便的荧光催化动力学测定痕量Co(Ⅱ)的新方法,该催化反应的表现活化能为69.69 kJ/mol,检出限度0.25 ng/ml,线性范围为(0.4-1.2) ng/25ml.     

流体室温磷光法测定痕量钛(IV)

基于曲拉通X-100和HAc-NaAc(pH=5.9)存在,不除氧条件下,曲拉通X-100能增敏钛(IV)-4,5-二溴苯基荧光酮流体室温磷光信号的增强效应,建立了曲拉通X-100增敏4,5-二溴苯基荧光酮的超高灵敏度流体室温磷光增强法测定痕量钛(IV)的新方法.钛(IV)量为3.2～6.4pg/mL与△Ip值成线性关系,其工作曲线的回归方程△Ip=-31.12+147.2CTi4+(pg/mL),r=0.9997,检出限为1.38pg/mL.该方法用于人发和茶叶中钛含量的测定,结果满意.     

阻抑褪色光度法测定痕量铋

在室温及弱酸性条件下,Bi(Ⅲ)对NaBO_3氧化吖啶黄有强的抑制作用,建立了测定痕量铋的阻抑褪色分析法.本法线性测定范围为8.0～8.0ig/L,检出限为3.6×10~(-9)g/mL,线性回归方程为:ΔA=0.00241C_(Bi)(ig/L)+0.000252,相关系数为r=0.9993.常见的阴阳离子不影响测定.本法已用于水样中的铋含量的测定,结果满意.     

稀土四元增敏型络合物显色反应的研究

在研究稀土-铬天青S(CAS)-5-硝基邻菲啰啉(5-N-phen)-溴化十六烷基三甲铵体系的显色反应之后,发现其它阳离子表面活性剂(CSF)如氯化十二烷基吡啶(DPC)有更强的增敏效果,因此本文对比了不同主碳链的烷基吡啶和烷基三甲铵两个系列不同表面活性剂对Nd-CAS-5-N-phen-CSF体系的增敏行为,进而对RE-CAS-5-N-phen-DPC体系络合显色反应做了系统研究,测定了络合物的组成及稳定常数,并拟定了测定稀土总量和钇组稀土的分光光度法。     

Tween-80增敏过氧化氢氧化考马斯亮蓝催化荧光法测定痕量锰

基于室温下考马斯亮蓝可发射强而稳定的荧光,Mn2 能灵敏催化过氧化氢氧化考马斯亮蓝使体系的荧光增强,据此建立了Tween-80增敏过氧化氢氧化考马斯亮蓝催化荧光法测定痕量锰的新方法.其线性范围为0.01-2.00(ng/mL),工作曲线的回归方程为△F=2.306 100.6 C Mn2 (ng/mL),相关系数r=0.9989,检出限为7.5×10-12g/mL.本法成功用于自来水和江水中痕量锰(II)的测定.同时探讨了催化过氧化氢氧化考马斯亮蓝离子缔合物荧光反应机理.     

镓-3,5二溴水杨基荧光酮-CTMAB-Tween 80多元配合物的分光光度法研究

在混合表面活性剂溴化十六烷基三甲铵(CTMAB)和吐温-80(Tween80)存在下,研究了3,5-二溴水杨基荧光酮(DBSAF)与镓(Ⅲ)显色反应的光度特征.在0.48mol/LHCl介质中,镓(Ⅲ)与DBSAF及表面活性剂形成胶束络合物,采用混合表面活性剂使增溶增敏作用更为显著,络合物表观摩尔吸光系数ε=3.78×105L·mol-1·cm-1,λmax=561nm.用摩尔比法和连续变换法测定镓(Ⅲ)与DBSAF所形成的络合物化学计量比为1∶4.镓(Ⅲ)含量在0～400μg/L范围服从比尔定律,拟定分析方法可直接用于矿石样品中微量镓的测定.     

催化H2O2氧化伊红Y褪色光度法测定痕量铋（Ⅲ）

在pH=4.34及加热条件下,基于Bi(Ⅲ)对过氧化氢氧化伊红Y的褪色反应的催化作用,首次提出过氧化氢氧化伊红Y测定痕量铋(Ⅲ)的催化光度法.所提方法灵敏度高,表观摩尔吸光系数ε514.8=3.6×108L·mol-1·cm-1检出限为2.0×10-14g/mL;工作曲线的回归方程△A=-0.0013+1.7625CB13-(μg/L);相关系数r=0.9995.本方法简便、快捷,成功地用于人发样和水样中痕量铋(Ⅲ)的测定,同时也讨论了催化褪色反应机理.     

微波消解-催化动力学光度法测定茶叶中微量锰

利用微波消解法前处理样品,同时研究了在pH值为9.2的Na2B4O7-NaOH缓冲溶液介质中阳离子表面活性剂溴化十六烷基吡啶对Mn(Ⅱ)催化H2O2氧化二甲酚橙的褪色反应具有明显的增敏作用,建立了催化动力学光度法测定痕量Mn(Ⅱ)的新方法.该方法的线性范围为0.04~0.40μg/mL,检出限为0.009 6μg/mL.用于茶叶中微量锰(Ⅱ)的测定,回收率为98.3%~102.3%,结果令人满意.     

抑制-褪色光度法测定痕量铁(Ⅲ)

.基于Na0H介质中,溴化十六烷基三甲铵(CTMAB)作为增稳剂时,Fe(Ⅲ)能抑制H202氧化桑色素的褪色反应,提出了一种高灵敏度测定痕量铁的新方法.该方法的表观摩尔吸光系数为3.1×107L·mo1-1·     

表面活性剂增敏动力学光度法测定痕量铁

在弱酸介质、溴代十六烷基吡啶增溶增敏下,邻菲啰啉活化剂存在,痕量铁催化过氧化氢还原次甲基蓝的褪色反应,测定了反应表观活化能,探讨了反应机理,建立了高选择性测量铁的方法。线性范围0～1.2μg/25ml,其灵敏度为9.8×10~-11g·ml-1,该方法简便,分析费用低,可直接用于环境水样中痕量铁的测定。     

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.