湿地松针叶挥发油化学成分研究

采用常压水蒸气蒸馏法提取了湿地松针叶挥发油,得油率为0．22％－0．25％,用GC,IR,NMR,GC－MS等方法对该精油进行了定性,定量分析,在分出的36个色谱峰中共鉴定出33个化合物,占该精油总量的99．79％,其中含有α－蒎烯,Δ3－蒈烯,γ－松油烯,乙酸龙脑酯,乙酸萜品酯及长叶烯等,含量最多的成分是β－蒎烯（36．536％）。     

贵州土荆芥挥发油化学成分研究

采用水蒸气蒸馏法提取土荆芥全草挥发性成分，用气相色谱／质谱进行分离测定，结果计算机检索技术对分离的化合物进行结构鉴定，鉴定出48个化学成分，主要成分为单萜烯类、倍半萜烯类及其含氧衍生物等，主要有吉巴烯D、β－石竹烯、吉马烯B、β－榄香烯、莪术烯、β－侧柏烯和α－杜松醇。应用色谱峰面积归一化法测定各成分的相对百分含量。     

豚草植株挥发性成分的SPME/GC-MS分析

采用固相微萃取／气相色谱联用（SPME／GC—MS）技术分析豚草的挥发性成分。从豚草挥发性成分中鉴定出51种物质,其中含量最高的为大根香叶烯D,相对含量为19．169％;其次依次为z-依兰油烯,相对含量为14．534％;γ-杜松烯,11．566％;△-杜松烯,8．206％等。其中种类最多的烯类,共36种,占总含量的82．158％,包括γ-萜品烯;α-蒎烯;delta-3-蒈烯;大根香叶烯B;γ-榄香烯;α-荜澄茄油烯;α-衣兰烯;α-古巴烯;β-波旁老鹳草烯;大根香叶烯D;z-古芸烯;α-古芸烯;z-依兰油烯;（＋）-Cyclosati-Velle;γ-杜松烯;雪松烯;β-荜澄茄油烯;α-律草烯;表-双环倍半水芹烯;γ-异荜茄澄烯;异丁子香烯;β-芹子烯;二环大根香叶烯;α-法呢烯;（-）-异喇叭烯;△-杜松烯;1S,CIS-菖蒲烯;β-柏木烯;α-藿香萜烯（薄荷烯）;α-长叶松烯;α-依兰油烯;（E,Z）-α-法呢烯;1,10-环氧-大根香叶烯D;环氧石竹烯;（-）-环氧石竹烯;香橙烯。     

豚草植株挥发性成分的SPME/GC-MS分析

采用固相微萃取/气相色谱联用(SPME/GC-MS)技术分析豚草的挥发性成分。从豚草挥发性成分中鉴定出51种物质,其中含量最高的为大根香叶烯D,相对含量为19.169%;其次依次为z-依兰油烯,相对含量为14.534%;γ-杜松烯,11.566%;Δ-杜松烯,8.206%等。其中种类最多的烯类,共36种,占总含量的82.158%,包括γ-萜品烯;α-蒎烯;delta-3-蒈烯;大根香叶烯B;γ-榄香烯;α-荜澄茄油烯;α-衣兰烯;α-古巴烯;β-波旁老鹳草烯;大根香叶烯D;z-古芸烯;α-古芸烯;z-依兰油烯;(+)-Cyclosati-vene;γ-杜松烯;雪松烯;β-荜澄茄油烯;α-葎草烯;表-双环倍半水芹烯;γ-异荜茄澄烯;异丁子香烯;β-芹子烯;二环大根香叶烯;α-法呢烯;(-)-异喇叭烯;Δ-杜松烯;1S,CIS-菖蒲烯;β-柏木烯;α-藿香萜烯(薄荷烯);α-长叶松烯;α-依兰油烯;(E,Z)-α-法呢烯;1,10-环氧-大根香叶烯D;环氧石竹烯;(-)-环氧石竹烯;香橙烯。     

湿地松和马尾松针叶精油的比较

用水蒸气蒸馏法提取了马尾松和湿地松的针叶精油，用GC及GC-MS联用仪对它们进行了定量和定性分析．研究表明马尾松针叶油中约含67种化学成份，湿地松针叶油中约含有74种化学成份．马尾松针叶油中α-蒎烯含量高于湿地松针叶油，但后者的β-蒎烯含量却高于前者．     

迷迭香挥发性成分的质谱分析

由黔产迷失香（Rosmarinus officinalisL.）的全草提取挥发油，用气相色谱－质谱进行分离测定，结合计算机检索技术对分离化合物进行结构鉴定，应用色谱峰面积归一化测定各成分的相对百分含量。鉴定出29个化学成分。主要成分为α－蒎烯、莰烯、α－水芹烯、β－水芹烯、1，8－桉叶素、樟脑、龙脑、乙酸龙脑酯、α－石竹烯、和β－石竹烯等。     

湿地松针叶中挥发油的化学组成

应用ＯＶ－１０１石英毛细管柱气相色谱和气－质联用首次对湿地松针叶中的挥发油化学组成进行了分离和鉴定。由湿地松针叶挥发油中共分出３４个主要色谱峰，其中单萜１８种，倍半萜１５种。高含单萜主要是α－蒎烯，β－蒎烯，柠檬烯和α－松油醇等，其中β－蒎烯占单萜总量５０％以上。湿地松新叶和二年生针叶的挥发油组分基本相同，各组分相对含量也非常相近。一年中不同时期针叶中的单萜，倍半萜相对含量有变化，３月份针叶中单萜含量普遍高于５月份针叶。而倍半萜的相对含量则大多低于５月份针叶。３月份针叶单萜约占单萜、倍半萜总量的５８．７％，而５月份的针叶中，单萜仅占有单萜、倍半萜总量的３９．５％。     

闽楠果皮挥发油的化学成分分析

采用水蒸气蒸馏法提取闽楠果皮挥发油,并用气相色谱-质谱联用技术对其果皮挥发油的化学成分进行分离鉴定,利用峰面积归一化法确定各组分的相对含量。从检出的87种成分中鉴定出55种,所鉴定成分占总挥发油量的74.42%,其主要化学成分为α-水芹烯（9.18%）、杜松烯（6.41%）、α-石竹烯（6.23%）、（-）-4-萜品醇（4.47%）、大根香叶烯（3.45%）、异龙脑（3.34%）、（-）-桉叶烯醇（3.28%）、（-）-α-桉烯（3.24%）、1-石竹烯（3.10%）、樟脑（2.76%）、（-）-可巴烯（2.63%）、乙酸龙脑酯（2.61%）、2-β-薄荷二烯（1.90%）、β-榄香烯（1.32%）、绿花白千层醇（1.25%）、1（5）-愈创木烯-11-醇（1.27%）等。     

湿地松和马尾松针叶精油的比较

用水蒸气蒸馏法提取了马尾松和湿地松的针叶精油,用GC及GC—MS联用仪对它们进行了定量和定性分析。研究表明马尾松针叶油中约含67种化学成份,湿地松针叶油中约含有74种化学成份。马尾松针叶油中α-蒎烯含量高于湿地松针叶油,但后者的β-蒎烯含量却高于前者。     

矮杨梅叶精油化学成分分析

本文应用气相色谱──质谱联用仪（ＧＣ／ＭＳ），测定分析了矮杨梅（ＭｙｒｉｃａｎａｎａＣｈｅｖａｌ．）叶精油化学成分。从分离的５４个峰中鉴定出４０种成分，其中主要成分是β－石竹烯（１４．５８％）、大根香叶酮（１２．５５％）、α－蒎烯（８．３６％）、烷（７．３６％）、甲酸异丙酯（６．７４％）、α－姜黄烯（５．６５％）、２－丁酸香叶酯（４．５５％）、α－古芸烯（３．７８％）等。并与同属植物杨梅（Ｍ，ｒｕｂｒａＳｉｅｄ．ｅｌＺｕｃｃ．）叶精油成分、含量进行了比较分析。     

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…     

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.     

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.