近红外付里叶变换表面增强喇曼散射技术的有效性研究

近红外激发的付里叶变换喇曼光谱是近年来发展起来的一项新技术，它吸引了人们对其应用研究的兴趣．本文将该技术与表面增强技术相结合形成的付里叶变换表面增强喇曼散射（ＮＩＲＳＥＲＳ）技术应用于高荧光量子产额分子的喇曼研究中，获得了其高质量的ＮＩＲＳＥＲＳ谱．本文的目的是淬灭荧光，进一步提高喇曼灵敏度，获得研究具有强荧光干扰的生物药物分子的ＳＥＲＳ方法     

量子点标记免疫凝集分析检测免疫球蛋白

利用量子点特殊的光学性能,结合免疫分析技术,建立快速、简便的免疫凝集分析检测方法.采用量子点标记羊抗鼠IgG,与溶液中的鼠IgG进行免疫反应,使量子点之间凝集形成网络结构,从而引起反应体系中量子点的荧光淬灭.随着鼠IgG量的增加,网络结构越来越大,量子点的荧光强度不断减弱.根据荧光信号的变化,检测溶液中鼠IgG的浓度.     

CdTe量子点与牛血红蛋白相互作用的研究

以巯基乙酸为稳定剂在水相中合成了尺寸均匀的CdTe量子点(QDs).考查了磷酸盐(PBS)缓冲体系中量子点与牛血红蛋白(Bovine Hemoglobin,BHb)之间的作用规律.结果表明,巯基乙酸修饰的CdTe量子点与BHb有较强的作用.BHb能使修饰后的CdTe量子点发生荧光淬灭现象,并且BHb的浓度以及酸度对荧光淬灭均有影响,并探讨了导致荧光淬灭的原因以及量子点与血红蛋白相互作用的机理.     

CdTe量子点与牛血红蛋白相互作用的研究

以巯基乙酸为稳定剂在水相中合成了尺寸均匀的CdTe量子点(QDs).考查了磷酸盐(PBS)缓冲体系中量子点与牛血红蛋白(Bovine Hemoglobin,BHb)之间的作用规律.结果表明,巯基乙酸修饰的CdTe量子点与BHb有较强的作用.BHb能使修饰后的CdTe量子点发生荧光淬灭现象,并且BHb的浓度以及酸度对荧光淬灭均有影响,并探讨了导致荧光淬灭的原因以及量子点与血红蛋白相互作用的机理.     

时间分辨脉冲热透镜光谱的解析

对Ｃ６０的时间分辨脉冲热透镜光谱进行了数学上的解析，得到了表征时间分辨脉冲透镜信号的光强ＩＴＬ（ｔ）随时间变化的理论模型，此模型符合实验结果，并根据此模型得到了苯溶液中溶解氧通过猝灭Ｃ６０三线态而生成的单线态氧的绝对量子产额（Φ△）的表达和Ｃ６０的本征三线态寿命（τＴ）为１０．２μｓ。     

一种新型碳量子点的合成及其对铜离子的检测

实验合成了一种表面带有丰富-NH_2和-OH、粒径均一且荧光性质稳定的荧光碳量子点。基于铜离子对该碳量子点的荧光淬灭,建立了一种快速简便、灵敏、选择性高的测定铜离子的方法。方法中,在优化得到的最佳条件下,铜离子浓度为1~100μmol/L时,反应体系的荧光淬灭程度与铜离子浓度呈良好的线性关系,最低检出限为:0.23μmol/L。不仅如此,此方法在实际样品中的应用效果也被进一步证实。     

水溶性CdTe量子点在金属离子检测中的尺寸效应

以巯基乙酸作为修饰剂,控制原料比例、pH值、反应时间,合成了不同粒径的荧光CdTe量子点,通过对各个金属离子的响应测试发现:小粒径量子点均对汞离子表现出淬灭的现象,其他金属离子则无明显响应;而大粒径量子点则对银离子表现出明显的淬灭现象,其他金属离子则无明显响应,两种粒径的量子点对Hg~(2+)和Ag~(+)的检测限分别为8.7 nmol/L和9.9 nmol/L。Hg~(2+)与大小粒径量子点作用的不同现象可能是由于小粒径量子点具有较大淬灭半径所引起,而Ag~(+)与大小粒径量子点作用的不同现象可能是由于大粒径量子点与银离子作用后发生了电子转移过程。证明量子点对金属离子的响应不仅与量子点的修饰剂有关,还与其粒径大小有关。利用这种方法,实现了对Hg~(2+)和Ag~(+)良好的灵敏性和选择性检测。     

短程有机电子给体-受体体系的合成

设计合成了一类以蒽为电子给体,带不同吸电子取代基的苯为电子受体的新型短程有机电子给体-受体体系。光谱实验研究发现,该短程给体-受体体系内存在非常强的荧光淬灭现象。实验结果分析表明强荧光淬灭的本质在于体系分子内快速的电子转移,同时表明缩短电子给体-受体之间的距离将加快电子转移过程。     

竞争吸收体系中荧光淬灭机制的理论分析──兼谈对Stern－Volmer方程的修正

本文针对竞争吸收体系中不同原因所引起的荧光淬灭进行了讨论，并提出了描述相应竞争吸收体系荧光淬灭效率的教学方程式以及求解静态及动态淬灭常数的方法，同时还对Ｓｔｅｒｎ－Ｖｏｌｍｅｒ方程在竞争吸收体系中的适用性进行了讨论与修正。     

新型水性硫杂蒽酮类光引发剂的合成III

合成了８个新的水性硫杂蒽酮类光引发剂,经过外、核磁共振、质谱和元素分析等确证了结构。同时测定了其吸收波长及荧光吸收光谱,计算了摩尔消光系数和荧光量子效率,并对其结构与光化学行为之间的关系做了初步探索。     

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.