4—溴—3,5—二羟基苯甲酸的合成与结构表征

４－溴－３,５－二羟基苯甲酸是嘧啶类药物的中间体,以３,５－二羟基苯甲 原料合成了它并用质谱进行了表征,同时对反应条件也进行了一定探索。     

新显色剂3,5-二溴-4-偶氮对苯二酚苯基荧光酮的合成及其分析性能研究

介绍了新试剂 ２,３,７－ 三羟基－ ９－ ［３,５－ 二溴－ ４－ （２,５－ 二羟基）苯偶氮］苯基荧光酮（ Ｄ Ａ Ｒ Ｐ Ｆ）的合成通过元素分析、红外光谱和紫外可见吸收光谱等方法测试,确定了该试剂的组成和结构研究了试剂的物理特性及与一些高价金属离子显色反应的光度性质     

4-溴3,5-二甲氧基苯甲醛的合成

以３,５－二羟基苯甲酸为原料经溴代、甲基化、缩合及氧化四步反应合成４－溴３,５－二甲基氧苯甲醛,总收率为１９．５％。     

2—双烷硫基亚甲基—5,5—二甲基—1,3—环己二酮与Grignard试剂...

用具有不同烷硫基的２－双烷硫基亚甲基－５，５－二甲基－１，３－环己二酮在丙基、２－甲基烯丙基、苯基卤化镁等Ｇｒｉｇｎａｒｄ试剂反应，对加成反应取向进行了初步考察。     

新的5，3＇，5＇－三羟基7－甲氧基黄酮及其一，二和三苄氧基衍生物的合成

通过３．５－二苄氧苯甲酸－２，６－二羟基－４－甲氧基苯丙酮酯进行Ｂａｋｅｒ－Ｖｅｎｋａｔａｒａ－ｍａｎ重排，环化合成了５，３＇，，５，三苄氧基７－甲氧基黄酮，然后选择性地和全部地脱节基得到５，３＇，５＇－三羟基－７－甲氧基黄酮及其一和二苄基衍生物．     

8—羟基喹啉衍生物的合成

2－甲基－8－羟基喹啉通过氯甲基化反应合成了2－甲基－5－氯甲基－8－羟基喹啉，收率65％。8－羟基喹啉通过先溴化生成5，7－二溴－8羟基喹啉，再与丁基锂作用生碾主基锂，然后与亲电试剂环氧乙烷或N，N－二甲基甲酰胺（DMF）分别作用合成了5－（2－羟乙基）－7－溴－8羟基喹啉，收率分别为70％和66％。     

芳甲酰基烯酮—1,2—亚乙二硫基缩酮与Grignard试剂的共轭加成反应

研究了芳甲酰基烯酮－１，２－亚乙二硫基缩酮与乙基、丙基、丁基等Ｇｒｉｇｎａｒｄ试剂的加成反应，实验结果表明，该反应可以发生１，４－加成而得到一个羰基保护起来的β－二酮，为合成各种结构的β－二酮类化合物提供了一个很好的方法。     

钒-9-(3,5-二溴)水杨基荧光酮-溴化十六烷基三甲基铵显色反应的研究及其应用

研究了钒－９－（３,５－二溴）水杨基荧光酮－ＣＴＭＡＢ三元配合物的显色反应条件,在ｐＨ５．５的六次甲基四胺－ＨＣｌ缓冲溶液中,钒与试剂形成１∶２的配合物,其最大吸收波长λｍａｘ＝５５７ｎｍ,表观摩尔吸光系数为ε＝１．８１×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,钒含量在０～９μｇ／２５ｍｌ范围内符合比耳定律．采用适当的分离手段,测定了钢样中的微量钒,结果满意．     

N，N—1，3—二溴—5，5—二甲基乙丙酰脲对醇及α一羟基酯的氧化作用

报道了N，N－1，3－二溴－5，5－二甲基乙丙酰脲对羟基的氧化作用，结果表明N，N－1，3－二溴－5，5－二甲基乙丙酰脲对醇及仲醇生成相应的醛或酮；氧化α一羟基酸生成少一个碳醛或酮；而氧化α－羟基酯则生成相应的酮酯，当含有β－H时，氧化的同时发生溴代，一步生成溴代酮酯，该氧化剂性能优良，反应温和，产率明显同于NBS，如氧化溴化乳酸生成重要的医药、农药中间体α－溴代的丙酮酸酯，产率高达83％。     

选择性去甲醚化反应—3，5—二甲氧基4—羟基甲苯甲酸甲酯的新合成方法

报道利用复合试剂无水氯化锌和丙酸可选择性地脱去3,4,5－三甲氧基4－羟基苯甲酸甲酯的4位甲氧基,较高收率的得到3,5－二甲氧基4－羟基苯甲酸甲酯。     

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.