烃基锡吲哚基羧酸酯的红外光谱研究

研究了烃基锡吲哚羧酸酯类化合物的特征红外光谱,讨论了它们随化合物的结构而变化的规律     

三烃基锡α-呋喃基羧酸酯的合成

合成了六个三烃基锡α－呋喃基羧酸酯Ｒ３ＳｎＯ２Ｒ′（Ｒ＝－Ｃ４Ｈ９－ｎ,－ＣＨ２Ｐｈ,Ｒ′＝Ｏ,ＯＣＨＣＨ,ＯＢｕｔ）．利用元素分析,ＩＲ以及１ＨＮＭＲ表征了这些化合物的组成和结构．     

几种新型二烃基锡羧酸酯类化合物的合成与表征

以二氟碳基锡氧化物（n-C6F13CH2CH2）2SnO,二正丁基锡氧化物（n-C4H9）2SnO和不同结构的芳香羧酸ArCOOH为原料,较高产率（68％～95％）地合成了尚未见文献报道的7种二烃基锡羧酸酯类化合物,并对这些化合物进行了表征．这些化合物属于两种构型{[R2Sn（OOCAr）]2O}2（A）和R2Sn（OOCAr）2（B）,在这两类化合物（A）和（B）中,中心锡原子具有不同的配位形式和配位数．     

二烃基锡N-(5-氯亚水杨醛基)-L-异亮氨酸酯的合成、结构及抑菌活性

利用二烃基二氯化锡和新制的N-(5-氯亚水杨醛基)-L-异亮氨酸反应合成了三个新的二烃基锡N-(5-氯亚水杨醛基)-L-异亮氨酸酯,R2Sn[2-O-5-C lC6H3CH=NCH(s-Bu)COO](R=Ph,1;c-C6H11,2;n-Bu,3),通过元素分析、IR、1H NMR及X-射线单晶衍射分析表征了其结构.化合物1属单斜晶系,P21空间群,中心锡原子具有畸变的三角双锥构型,与三齿配体形成了五元和六元两个螯合环.生物活性测试表明,合成的三种化合物对大肠杆菌和金黄色葡萄球菌均有良好的抑制作用.     

三苯基锡二元羧酸配合物的合成

以双（三苯基锡）氧化物和相应的二元羧酸反应，合成了１４种新的三苄基锡二元羧酸配生物．利用元素分析、ＩＲ和１ＨＮＭＲ表征了这些化合物的结构．生物活性测试表明，该类化合物具有较好的杀菌活性．     

具有生物活性有机锡化合物的研究

近年来,有机锡化合物研究受到人们的重视,二烃基锡,三烃基锡,四烃基锡在抗癌,杀菌,防腐,生态环境保护方面都有新的进展,本文介绍有机锡化合物的研究进展,特别是在抗癌,杀菌等方面的研究和应用情况。     

二烃基锡二元羧酸酯聚氯乙烯热稳定剂性能研究

报道了二丁基锡和二辛基锡２个系列的α,ω－二元羧酸酯类化合物的合成以及作为聚氯乙烯热 稳定剂的性能测试结果．测定表明,这类化合物对聚氯乙烯都有良好的热稳定作用,尤其是丁烯二酸酯和邻苯 二甲酸酯具有很好的热稳定剂性能．     

三苄基锡羧酸酯的合成及催化性能研究

合成了3种苄基锡羧酸酯,并对其进行了表征及催化性能评价。三苄基锡羧酸酯对醇醛缩合反应有很好的催化选择性,对醇酸酯化反应有很高的催化活性和选择性,副反应很小。     

二烃基锡二元羧酸酯聚氯乙烯热稳定剂性能研究

报道了二丁基锡和二辛基锡2个系列的α,ω－二元羧酸酯类化合物的合成以及作为聚氯乙烯热稳定剂的性能测试结果,测定表明,这类化合物对聚氯乙烯都有良好的热稳定作用,尤其是丁烯二酸酯和邻苯二甲酸酯具有很好的热稳定剂性能。     

五甲氧羰基环戊二烯负离子亲核取代反应

五甲氧羰基环戊二烯由于环上多个羧酸酯基取代,以至所得金属化合物有特殊的性质,1983年,我们曾利用此特点,合成了多种具环戊二烯基的镧系络合物。只是由于此类络合物多数呈粉末状,不易获得 X 射线结构分析的数据,因此设想合成相应的有机物以观察其结构.结果表明,此类化合物和大多数环戊二烯类不同,环上的羧酸酯基取     

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.