导入苯并含氮杂环的嘧啶类衍生物的合成

三种N－氯乙酰取代的苯并含氮杂环化合物通过硫醚键的形成被导入嘧啶结构。新的嘧啶化合物的结构经MS，HNMR，CNMR和元素分析得到表征。     

N''-(4,5,6-三取代嘧啶-2-基)-α-氯乙酰脲的合成及生物活性测定

合成了9种含多取代嘧啶环的α-氯乙酰脲,其中8种为新化合物.结构经IR,1H NMR,MS和元素分析测试而确证,初步生物活性测试结果表明：标题化合物具有优良的生物活性,且嘧啶环上取代基的性质对此类化合物影响很大,含4羟基取代嘧啶环的标题化合物具有较好除草活性,而含4氯取代嘧啶环的化合物一般具有一定的植调活性.     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研究(Ⅱ)

取代苯氧乙酸经酰化、异流氰酸酯化、与取代-2-氨基嘧啶加成3步反应合成了10种未见文献报道的取代苯氧乙酰硫脲类嘧啶衍生物．结构经IR,HNMR和元素分析等测试方法而确证．用平皿法初步测定了目标化合物的生物活性,结果表明：4-硝基苯氧乙酰硫脲类嘧啶衍生物在低浓度时促进单子叶植物的生长,高浓度时抑制双子叶植物的生长．2,4-二氯苯氧乙酰硫脲类嘧啶衍生物,对单子叶和双子叶植物的生长均具有超高抑制活性．     

苯并含氮杂环取代的嘧啶类化合物的合成

设计并合成了四种苯并含氮杂环取代的嘧啶类新化合物,它们的结构经MS,IR和∧1H NMR分析得到确定。     

异脲盐法合成胍及其N-取代嘧啶胺衍生物的研究

采用异脲盐法合成一系列N-取代胍和N-取代-4-(3-吡啶基)嘧啶-2-胺类化合物。以O-甲基异脲硫酸盐为起始原料,与脂肪胺类或芳香胺类化合物反应合成脂肪胍或芳香胍类化合物(1),再以3-乙酰吡啶和N,N-二甲基甲酰胺二甲基缩醛(DMF-DMA)为原料反应合成3-(二甲基氨基)-1-(3-吡啶基)-2-丙烯-1-酮(2),将化合物(1)和(2)在碱性条件下反应,最终得到目标产物N-取代-4-(3-吡啶基)嘧啶-2-胺(3)。合成出了6个N-取代胍及其相应的衍生物N-取代-4-(3-吡啶基)嘧啶-2-胺类化合物,并用1H NMR,IR和元素分析表征了目标产物的结构。该方法路线简捷环保、原料廉价易得、反应条件较温和。     

N′—（4,5,6,—三取代嘧啶—2—基）—α—氯乙酰脲的合成及生物活性测定

合成了9种多取代嘧啶环的α-氯乙酰脲,其中8种为新化合物,结构经IR,1HNMR,MS和元素分析测试而确证,初步生物活性测试结果表明：标题化合物具有优良的生物活性,且嘧啶环上取代基的性质对此类化合物影响很大,含4－羟基取代嘧啶环的标题化合物具有较好除草活性,而含4－氯取代嘧啶环的化合物一般具有一定的植调活性。     

骨髓增殖性肿瘤治疗药物TG101348的合成工艺研究

研究了骨髓增殖性肿瘤治疗药物TG101348的合成工艺.将2,4-二羟基-5-甲基嘧啶与三氯氧磷、氨水发生氯化、取代反应生成2-氯-4-氨基-5-甲基嘧啶（Ⅲ）,而后Ⅲ与N-叔丁基-3-溴苯磺酰胺（Ⅰ）发生Buchwald偶联反应得到3-[（2-氯-5-甲基-4-嘧啶基）胺基]-N-（叔丁基）苯磺酰胺（Ⅳ）,Ⅳ再与CH3 OH-HCl反应得到3-[（2-氯-5-甲基-4-嘧啶基）胺基]-N-（叔丁基）苯磺酰胺盐酸盐（Ⅴ）,最后Ⅴ与1-（4-氨基苯氧乙基）吡咯烷（Ⅵ）发生亲核取代反应得到TG101348,HPLC测得TG101348的纯度为99.7;.     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研？…

取代苯氧乙酸经酰化，异硫氰酸酯化，与取代－２－氨基嘧啶加成３步反应合成了１０种未见文献报道的取代苯氧乙酰悄类嘧啶衍生物，结构经ＩＲ＾１ＨＮＭＲ和元素分析等测试方法而确证，用平皿法初步测定了目标化合物的生物活性，结果表明，４－硝基苯氧乙酰硫脲类嘧啶衍生物在低浓度时促进单子叶植物的生长，高浓度时抑制了双子叶植物的生长，２，４－二氯苯氧乙酰硫脲在嘧啶衍生物，对单子叶和双子叶植物的生长均具有超高抑制活性。     

取代苯氧乙酰硫脲类嘧啶衍生物的合成及生物活性研究(Ⅰ)

从时硝基苯酚出发经醚化、酰化、异硫氰酸酯化、与取代-2-氨基嘧啶加成4步反应．合成了6种未见义献报道的含取代嘧啶环的对硝从苯氧乙酰硫脲类化合物．结构经IR．HNMR和元素分析等测试而确证．初步的生物活性测定结果表明：部分目标化合物对单子叶植物（如稗草）的生长有较强的促进作用,而对双子叶植物（如油菜）的生长有很强的抑制活性．即具有优良的选择活性．     

4-或6-芳基取代的二氢嘧啶-4-酮的合成

报道了一价酮催化N-乙酰基-1-苯基炔丙基胺或N-苯甲酰基-炔丙基胺与对甲基苯磺酰叠氮反应生成4-或6-芳基取代的二氢嘧啶-4-酮的方法.该反应过程首先是发生铜催化的炔与叠氮化物反应生成乙烯亚胺中间体A,紧接着乙烯亚胺中间体A经过分子内环加成得到B,B再经过重排反应生成4-或6-芳基取代的二氢嘧啶-4-酮类化合物.采用...     

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.