溴酸钾-吖啶红-萘酚体系的光谱研究及其分析应用

基于稀硫酸介质中,萘酚与溴酸钾、吖啶红等发生反应,并形成聚集体,导致体系的共振光散射(RLS)大大增强,从而建立了测定尿中痕量萘酚的RLS新方法.研究了体系的RLS强度的影响因素,优化了反应条件,并对反应机理进行了初步探讨.α-萘酚和β-萘酚最大的RLS峰均位于340 nm;α-萘酚的线性范围为1.85×10-7～2.30×10-5 mol/L,β-萘酚为1.29×10-7～2.40×10-5 mol/L;检出限α-萘酚为5.5×10-8 mol/L,β-萘酚为3.9×10-8 mol/L.该方法已成功用于人尿中痕量萘酚的测定相对标准偏差为4.80 %～6.10 %,平均回收率为98.40 %.与高效液相色谱法比较,结果满意.     

共振光散射增强法测定痕量铅

基于铅可以对十六烷基三甲基铵(CTMAB)-四磺基锰酞菁(MnTSPc)-DNA共振光散射(RLS)体系产生强烈的敏化作用,从而建立了测定痕量铅的灵敏的RLS新方法.该法的线性为0.0-4.0×10-6mol/L,检出限3δ)为8.56×10-8mol/L,对1.0×10-6mol/L的铅标准溶进行连续9次平等测定,相对标准偏差为1.6%.我们用该法对实际水样进行了分析测量,效果良好.     

阿魏酸荧光熄灭法测定痕量亚硝酸根

在pH 5.0的HAc～NaAc缓冲溶液中,阿魏酸与痕量亚硝酸根反应,使得阿魏酸在激发波长358.0nm,发射波长为450.0nm条件下的荧光强度明显下降,其相对荧光强度在一定范围内与亚硝酸根的浓度呈线性关系,从而建立了荧光熄灭法测定痕量亚硝酸根的新方法.方法的线性范围为1.00×10(-6)～8.00×10~(-3)mol/L,检出限为3.47×10~(-7)mol/L.方法已用于环境水样中痕量亚硝酸根的测定,回收率在96.7%～104.5%.     

依思明蓝与牛血清白蛋白作用的共振光散射研究

研究了依思明蓝和牛血清白蛋白结合的共振散射光谱特征.实验结果表明,在pH=3.78水溶液中,血清白蛋白可与染料探针依思明蓝通过疏水作用结合并产生以367.4-nm为特征峰的共振光散射(RLS)增强光谱.在该特征波长下测定的增强共振光散射强度(ΔIRLS)与血清白蛋白浓度在一定范围内具有线性关系.据此建立了痕量血清蛋白的共振光散射分析法.当依思明蓝的浓度为1.5×10-5mol/L时,牛血清白蛋白,人血清白蛋白以及IgG的检测限分别可达2.34-ng/mL,6.86-ng/mL和10.9-ng/mL.基于共振光散射数据及Scatchard图,获得依思明蓝与牛血清白蛋白和人血清白蛋白的结合常数(K)以及结合位点数(n)分别为2.90×105L/mol,2.9和2.96×105L/mol,0.35.     

罗丹明6G共振光散射法测定痕量亚硝酸根

在盐酸介质中,痕量亚硝酸根与罗丹明6G发生亚硝化反应,使罗丹明6G溶液在527nm处的共振散射光强度明显下降,从而建立了共振光散射法测定痕量亚硝酸根的新方法.方法的线性范围为0.02×10-6～0.2×10-6g/mL,检出限为1.22×10-8gm/L.方法用于废水和蔬菜中痕量亚硝酸根的测定,回收率在95.5%～104.9%之间。     

银纳米敏化铽-氧氟沙星二级散射法测定氧氟沙星含量

银纳米能有效地增强Tb(Ⅲ)-氧氟沙星的二级散射峰,且体系的二级散射强度与氧氟沙星的浓度在一定范围内呈线性关系.据此建立了银纳米敏化的二级散射法测定氧氟沙星的新方法,并对实验条件进行了优化.该方法测定氧氟沙星的线性范围为10-8～10-6 mol/L,检出限为3.98×10-9 mol/L.     

用巯基丙酸修饰银纳米粒子共振光散射法测定稀土总量

依据文献合成了巯基丙酸修饰的银纳米粒子,并用共振光散射法调查了它们与稀土离子的相互作用.在pH 7.5的Tris-HCl缓冲介质中,银纳米粒子在467 nm呈现一弱的共振光散射峰.Eu3+离子的加入导致体系共振光散射峰显著增强,并伴随47 nm(从467到514 nm)的散射峰红移.上述光谱变化可能是由于Eu3+离子与纳米粒子表面的羧基发生配位作用所导致的粒子间的聚集引起的.根据体系对其它稀土离子类似的信号响应,我们建立了一种测定稀土离子总量的共振光散射新方法.最佳条件下,稀土离子浓度在6.0×10-7-8.0×10-6mol/L范围内与共振光散射强度呈正比,检测限为2.8×10-8mol/L.该方法简便、灵敏,用于环境水样中稀土离子总量的测定,结果令人满意.     

罗丹明S与四溴合汞络离子缔合物固体基质室温燐光法测定痕量汞

基于硝酸(0.10mol/L)介质中,四溴合汞络阴离子([HgBr4]2-)与Rhod S+(罗丹明S阳离子)作用所形成的[(Rhod S)2]2+·[HgBr4]2-离子缔合物比Rhod S+·Br-在聚酰胺素膜(PAM)固体基质上所占有的Rhod S分子数增加和内重原子微扰效应,从而导致体系的室温烧光(RTP)信号剧烈增强的特性,由此建立了[(Rhod S)2]2+·[HgBr4]2-缔合物固体基质室温燐光法(SSRTP)测定痕量汞的新方法.该方法的线性范围为:0.10～16.0 fgspot1-(对应浓度0.60～40.0 pg mL-1,点样体积0.40μL).工作曲线的回归方程为△Ip=3.955+23.86mHg2+(fgspot-1),n=6,相关系数r=0.9997,检出限为5.0 agspot-1(对应浓度1.25×10-15 gmL-1).本方法成功用于人发.香烟和水样品中痕量Hg2+的测定.同时讨论了离子缔合物SSRTP测定痕量汞机理.     

间接荧光光度法测定痕量铈

基于在无荧光性的铈(Ⅳ)体系中加入抗坏血酸后生成有特征荧光的铈(Ⅲ)离子,体系中再加入一定浓度的甲醛溶液后,新体系的荧光性得到更大强度的增敏.据此建立了一种间接测定痕量铈(Ⅳ)离子的新方法.利用该方法铈(Ⅳ)离子浓度在1×10-6 mol/L～1×10-4 mol/L范围内呈良好的线性关系,检出限为7.2×10-8mol/L.此方法具有操作简便、灵敏度高、选择性好等优点.     

痕量间苯二酚的B-Z振荡反应动力学测定

研究了在封闭体系中B Z振荡反应测定间苯二酚的条件 ,建立了测定痕量间苯二酚的新方法 .当 [KBrO3]=0 2 5mol/L ,[CH2 (COOH) 2 ]=0 5mol/L ,[Ce(SO4 ) 2 ]=0 0 4mol/L ,[H2 SO4 ]=0 8mol/L时 ,间苯二酚在 6 5×10 - 7mol/L～ 1 0× 10 - 5mol/L范围内 ,浓度与振幅改变值ΔA呈线性关系 ,检出限为 6 0× 10 - 7mol/L .用于废水中间苯二酚的测定 ,回收率为 99% .     

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).     

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.