蓬子菜中酚酸类成分的分离与鉴定

对茜草科拉拉藤属植物蓬子菜(Galium verum L)全草的乙醇[Ф(乙醇)=95%]提取物进行分离和鉴定.经反复纯化制备化合物,并根据化合物的理化性质分析、波谱解析、对照品比较及与文献报道对比鉴定化合物的化学结构.从蓬子菜全草的乙醇[Ф(乙醇)=95%]提取物中分离得到7个化合物,分别鉴定为芥子酸(1)、丁香酸(2)、咖啡酸丁酯(3)、原儿茶酸(4)、4-羟基苯甲酸(5)、咖啡酸(6)和绿原酸(7),化合物1～5为从该属植物中首次分离得到.     

壮药香艾纳的化学成分研究

采用硅胶柱层析方法,对壮药香艾纳95％乙醇提取物的化学成分进行研究,共分离得到7个化合物,根据其理化性质和波谱学数据进行结构鉴定,结果表明分离得到的7个化合物分别为β-谷甾醇(Ⅰ)、豆甾醇(Ⅱ)、β-胡萝卜苷(Ⅲ)、咖啡酸(Ⅳ)、没食子酸(Ⅴ)、槲皮素(Ⅵ)、木犀草素(Ⅶ),其中豆甾醇、β-胡萝卜苷、咖啡酸、没食子酸为首次在该植物中分离得到.     

蒲儿根花的化学成分研究

采用硅胶柱色谱,Sephadex LH-20凝胶柱色谱等色谱技术分离纯化菊科蒲儿根花的化学成分,通过理化方法和波谱数据确定化合物结构.从蒲儿根花的乙醇浸膏中分离并鉴定了6个化合物:β-谷甾醇(1)、棕榈酸(2)、泽兰素(3)、euparone(4)、金丝桃苷(5)和咖啡酸(6).以上化合物都是从该植物中首次得到,其中化合物3是该植物花部位含量高、且具有苹果香味的芳香性成分.     

青兰属植物甘青青兰化学成分研究

利用硅胶柱色谱、凝胶柱色谱、高效液相色谱及薄层色谱进行分离纯化,并通过UV、IR、MS、1H NMR、13C NMR等波谱技术进行结构鉴定,采用MTT(溴化四甲基偶氮唑盐)染色法检测化合物的抗肿瘤活性.从甘青青兰植物中共分离得到6个化合物,它们分别为迷迭香酸(1),迷迭香酸甲酯(2),2,3-2H-3-羟基-咖啡酸甲酯(3),咖啡酸(4),对羟基苯甲酸(5),原茶酸(6).对化合物1、2、3进行了抗肿瘤活性测定,其中,化合物1、3具有较好的体外抗肿瘤活性.     

楤木根的化学成分研究

利用柱色谱、薄层色谱、高效液相色谱及波谱分析等分离技术对楤木根进行了化学成分研究.从云南产楤木根的95%乙醇提取物中分离并鉴定得到8个化合物,分别鉴定为:3-O-β-D-葡萄糖苷(1)、芹黄素-7-O-α-L-鼠李糖苷(2)、咖啡酸乙酯(3)、反式阿魏酸(4)、咖啡酸甲酯(5)、3-甲氧基-4-羟基苯甲醛(6)、香兰醇(7)、β-谷甾醇(8).其中,化合物1~7为首次从该种植物中分离得到.     

四数九里香的化学成分研究

采用硅胶柱层析色谱和重结晶方法对四数九里香(Murraya tetrameraHuang in Acta Phytotax.Sin.)的非挥发油成分进行分离和纯化,通过理化性质和波谱技术鉴定化合物结构。结果分离并鉴定出5个化合物:补骨脂素、槲皮素3-O-β-D-吡喃葡萄糖苷、咖啡酸、正三十一烷、正三十四烷醇。5个化合物均为首次从该植物中分离得到。     

水杨梅化学成分研究

采用柱色谱技术,对水杨梅的化学成分进行分离,从水杨梅乙醇提取物的乙酸乙酯萃取部位分离得到3个化合物,从正丁醇萃取部位分离得到4个化合物;根据光谱分析和文献对照的方法鉴定它们的结构分别为:异香草酸(1),七叶内酯(2),咖啡酸(3),5-hydroxy-2-methylchromone-7-O-β-D-xylopyranosyl(1→6)-β-D-glucopyranoside(4),东莨菪素(5),7-O-β-D-glucosyl-noreugenin(6),东莨菪苷(7).化合物1、2、3和7为首次从该植物中分离得到.     

霸王鞭的化学成分研究

对采自云南西双版纳的霸王鞭(Euphorbia royleana)地上部分进行了化学成分研究.采用正、反相硅胶柱层析,凝胶柱层析及半制备HPLC等分离技术,对霸王鞭的正丁醇提取物进行分离纯化,得到了7个单体化合物.过~1H NMR和~(13)C NMR波谱数据分析及文献对照,其结构鉴定为4′-甲氧基槲皮素(1)、taxifolin(2)、咖啡酸(3)、1,2,4-苯三酚(4)、尿囊素(5)、尿嘧啶(6)和肌醇(7).所有的化合物均首次从该植物中分离得到.     

还阳参化学成分的分离及结构鉴定

研究还阳参Crepis tectorum Linn.根的化学成分。采用柱层析、高效液相色谱等方法进行分离和纯化,通过理化、核磁共振等现代波谱技术鉴定化合物结构。从还阳参根石油醚部分分离得到3个化合物,分别鉴定为二十六烷醇(Ⅰ)、β-谷甾醇(Ⅱ)、蒲公英醋酸酯(Ⅲ);从其乙酸乙酯部分分离得到2个化合物,鉴定为咖啡酸(Ⅳ)和伪蒲公英甾醇乙酸酯(Ⅴ)。     

打破碗花花化学成分研究

采用硅胶、Sephadex LH-20、制备液相等色谱方法对打破碗花花70%乙醇提取液进行分离纯化,运用理化性质和核磁共振波谱、质谱等数据进行结构鉴定.结果得到了15个化合物,分别鉴定为:棕榈酸(1)、4-甲氧基水杨醛(2)、邻苯二甲酸二甲酯(3)、苯甲酸(4)、桂皮酸(5)、3-(4′-formylphenoxy)-4-methoxybenzaldehyde(6)、eugenin(7)、滨蒿内酯(8)、7-甲氧基香豆素(9)、1,8-二羟基蒽醌(10)、咖啡酸甲酯(11)、齐墩果酸(12)、阿魏酸(13)、咖啡酸(14)、胸腺嘧啶核苷(15).化合物2～4、6～11为首次从银莲花属植物中分离得到,所有化合物均是首次从打破碗花花中分离得到.     

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).     

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.