华荠薴中的黄酮类化合物

从华荠（ＭｏｓｌａｃｈｉｎｅｎｓｉｓＭａｘｉｍ）中分离鉴定了６种黄酮类化合物，经光谱分析及化学方法鉴定为：５－羟基－６，７－甲基黄酮；５，７－二羟基－４＇－甲氧基黄酮；洋芹素；鼠李柠檬素；桑色素－７－Ｏ－β－Ｄ－葡萄糖甙；山奈素－３－Ｏ－β－Ｄ－葡萄糖甙．均为首次从该植物中分得．     

中国马先蒿环烯醚萜,木脂素和苯丙素甙成分研究

从中国马先蒿根部甲醇提取物的正丁醇浸豪中分离出５个甙类化合物，经ＩＲ，ＵＶ，＾ＨＮＭＲ，＾１３ＣＮＭＲ，ＤＥＰＴ，ＥＩＭＳ，ＦＡＢＭＳ以及化学转化鉴定它们为：６－Ｏ－甲基－构叶珊瑚甙（１），丁香醇－４″－β－Ｄ－葡萄糖吡喃甙（２），１＇－β－Ｄ０）３－羟基－４－甲氧基－苯基）－乙基β－Ｄ芹糖（１→３＇＿－α－Ｌ－鼠李糖（１－６＇）－４＇－反－阿魏酰基－葡萄糖吡喃甙（３），１＇－Ｏβ－Ｄ－（３－羟基     

藏药全缘叶绿绒蒿化学成分的研究(Ⅰ)

从全缘叶绿绒蒿（ＭｅｃｏｎｏｐｓｉｓｉｎｔｅｇｒｉｆｏｌｉｄＭａｘｉｍ）中分离鉴定了５个化合物．经光谱方法测定，它们是β－谷甾醇（１），胡萝卜甙（２），二十九烷醇（３），亚麻油酸乙酯（４）和原鸦片碱（５）．其中化合物（１）～（４）为首次从该属植物中分得     

3[3‘（4“—吡啶基）—4’—苯基—1,2,4,—三唑—5‘—硫亚甲基]—…

在氢氧化钾中，处理３（４＇－吡啶基）－４－苯基－１，２，４－三唑－５－硫乙酰肼６和二硫化碳，接着肼解得到３［３＇（４＂－吡啶基）－４＇苯基－１，２，４－三唑－５＇－硫亚甲基］－４－氨基－１，２，４－三唑－５－硫醇，同时还制备了另一个化合物２［３＇（４＂－吡啶基）－４＇－苯基－１，２，４－三唑－５＇－硫亚甲基］－１，３，４－恶二唑－５－硫醇。文中还讨论了不同化合物生成的机制。     

藤茶甙的分离和结构确定

从显齿蛇葡萄「Ａｍｐｅｌｏｐｓｉｓ ｇｒｏｓｓｅｄｅｎｔａｔａ（Ｈａｎｄ－Ｍａｚｚ）Ｗ．Ｔ．Ｗａｎｇ」的乙醇提取物中分离得到一个新化合物,经光谱分析和化学反应鉴定为４′－羟基－３′－甲氧基异黄烷－７－Ｏ－α－Ｌ鼠李糖（１→６）－β－Ｄ－葡萄糖甙,命名为藤茶甙（ｇｒｏｓｓｅｄｅｎｔａｔａｓｉｄｅ）。     

川黄柏叶中黄酮成分的研究

利用柱层析和光谱分析方法研究川黄柏（ＰｈｅｌｌｏｄｅｎｄｒｏｎｃｈｉｎｅｎｓｅＳｃｈｎｅｉｄ）叶的黄酮类化合物,分离并鉴定了３个化合物（Ⅰ、Ⅱ、Ⅲ）．即槲皮素－３－０－β－Ｄ半乳糖甙（Ⅰ）,又名金丝桃甙（Ｈｙｐｅｒｏｓｉｄｅ）、双氢山奈酚（Ⅱ）（Ｄｉｈｙｄｒｏｋａｅｍｐｆｅｒｏｌ）和５’－异戊烯基双氢山奈酚－７－Ｏ－β－Ｄ葡萄糖（Ⅲ）,命名为黄柏新甙Ａ（ＰｈｅｌｌｏｃｈｉｎｉｎＡ）．其中Ⅲ是新化合物,Ⅱ是首次从本属植物中发现。     

巨枝大戟化学成分的研究

从巨大枝戟的全草中分离得到１０个化合物,分别鉴定为：１,２：５,６二－氧－异丙叉基－α－Ｄ－呋喃葡萄糖甙（１）,１,２：４,５－二氧－异丙叉基－β－Ｄ吡喃果糖甙 （２）,１,２氧－异丙叉基－α－Ｄ－呋喃葡萄糖（３）,１,２－氧化－异丙叉基－β－Ｄ吡喃果糖甙（４）,５－羟基甲基糖醛（５）,５－甲氧基甲基糖醛（６）,Ｄ－葡萄糖（７）,β－谷苗醇（８）,β－胡罗卜甙（９）,乔木萜醇（１０）,其中１－７为     

华荠Ning中的黄酮类化合物

从华荠Ｎｉｎｇ中分离鉴定了６种黄酮类化合物，经光 主化学方法鉴定为：５－羟基－６，７－二甲基黄酮；５，７－二羟基－４－甲氧基黄酮；洋芹素；鼠李柠檬素；桑色素－７－０－β－Ｄ葡萄糖甙；山奈素－３－Ｏ－β－Ｄ葡萄糖甙，均为首次从该植物中分得。     

从香菇发酵醪液中分离鸟苷酸技术的研究

香菇发酵醪处理液经７３２阳树脂在ｐＨ２．５￣３．０时得５＇－ＧＭＰ和５＇－ＣＭＰ混合液，再调至ｐＨ４．０￣４．５上７１７阴离子树脂柱，５＇－ＧＭＰ被吸附，用ψ＝３％ＮａＣｌ溶液解吸，即分离得５＇－ＧＭＰ。醪液经０．２μｍ胶体磨破壁后分别作了自溶，酶解（５＇－磷酸二脂酶）和自溶加酶解三种处理，结果５＇－ＧＭＰ得率分别为９４．０％，９５．１％和９５．０％，未见显著差异。     

木香薷化学成分的研究

从木香薷（Ｅｌｓｈｏｌｔｚｉａｓｔａｕｎｔｏｎｉｉ）分得１６种化合物,用光谱和理化等方法鉴定了其中１２种：６－甲基三十二烷（１）、β－谷甾醇（２）、α－Ｌ－正丁基山梨糖甙（３）、５－３″－甲基丁基）－８－甲氧基呋喃香豆素（４）、５－（３″－甲基－２″－烯丁基）－８－甲氧基呋喃香豆素（５）、５,７－二甲氧基－４′－羟基黄酮（６）、５,５′－二羟基－７－甲氧基－６,８,３″,３″－四甲基－３′,４′并     

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.