粉被虫草菌丝体多糖的分离纯化及其性质

粉被虫草菌丝体经沸水浸提，醇析，透析，Ｓｅｖａｇｅ法脱蛋白，再经ＤＥＡＥ－纤维素和Ｓｅｐｈａｄｅｘ－Ｇ－１００柱层析纯化，得菌丝体纯多糖ｐｓ１和ｐｓ２．高效液相色谱（ＨＰＬＣ）检测ｐｓ１和ｐｓ２的为单一物质，凝胶过滤法测得ｐｓ１和ｐｓ２的分子量分别为２４０００和１３０００Ｄａｌ，气相色谱分析表明ｐｓ１的单糖组分有Ｄ－甘露糖，Ｄ－葡萄糖和Ｄ－半乳糖，ｐｓ２的单糖组分有Ｄ－甘露糖和Ｄ－葡萄糖，ＩＲ分析     

杜氏藻中多糖的化学研究（Ⅰ）

用０．２％稀碱溶液萃取杜氏藻提取出β－胡萝卜素后的残渣，经浓缩后用乙醇沉淀，得粗多糖，以Ｓｅｖａｇｅ法除去蛋白质，再经ＤＥＡＴ－纤维素及葡聚糖凝胶Ｇ－１００柱层析，得杜氏藻多糖（简称ＰＤＳ）．多糖经薄层层析、纸层析、气相色谱及经甲基化后的色谱／质谱分析，获知有５种糖，即半乳糖、木糖、鼠李糖、葡萄糖、甘露糖，并测得各种糖的可能连接．     

沙棘果水溶性多糖Hn的分离纯化与抗病毒研究

沙棘果皮沸水煮提得到粗多糖，经纸层析及气相色谱分析，该粗多糖组成为Ａｒａ，Ｆｕｃ，Ｇａｌ，Ｍａｎ，Ｇｌｃ和ＧａｌＡ，粗多糖经酸性乙醇分级得四个级分，将对柯萨奇病毒Ｂ３有初步抑制作用的ＨＲ３用ＤＥＡＥ－ＳｅｐｈａｄｅｘＡ－２５柱层析进一步分级，得到２个级分Ｈｎ和Ｈａ，Ｈｎ是由Ａｒａ，Ｇａｌ，Ｍａｎ和Ｇｌｃ组成的中性杂多糖，对柯萨奇病毒Ｂ３具有明显的抑制作用。     

螺旋藻水溶性多糖的分离纯化

螺旋藻干粉经乙醇脱脂后用水提取,乙醇沉淀,并经凝胶Ｓｅｐｈａｄｅｘ－Ｇ柱层析精制,获得４种螺旋藻制多糖ＳＰＡ－１,ＳＰＡ－２,ＳＰＡ－３,ＳＰＡ－４,研究表明均为均一多糖组分。     

短裙竹荪（Dictyophor a duplicata）多糖的研究（I）：Dd多糖的分离…

竹荪子实体经热水提取，乙醇沉淀，蛋白酶法和Ｓｅｖａｇ法相结合去蛋白，再通过ＤＥＡＥ－Ｓｅｐｈａｄｅｘ Ａ－２５和Ｓｅｐｈａｄｅｘ Ｇ－２００柱层析纯化，得到竹荪多糖（简称Ｄｄ）纯品，经凝胶过滤法和聚丙烯酰胺凝胶电泳法测定表明，Ｄｄ多糖为均一的物质，Ｄｄ经紫外扫描，无核酸和蛋白质的特征吸收峰，ＩＲ－４００扫描表明典型多糖吸收峰，Ｄｄ的相对分子质量约为１９６０００。     

短裙竹荪（Dictyophora duplicata）多糖的研究（Ⅰ）──Dd多糖的分离、纯化及其部分理化性质

竹荪子实体经热水提取，乙醇沉淀，蛋白酶法和Ｓｅｖａｇ法相结合去蛋白，再通过ＤＥＡＥ－ＳｅｐｈａｄｅｘＡ－２５和ＳｅｐｈａｄｅｘＧ－２００柱层析纯化，得到竹荪多糖（简称Ｄｄ）纯品。经凝胶过滤法和聚丙烯酰胺凝胶电泳法测定表明，Ｄｄ多糖为均一的物质。Ｄｄ经紫外扫描，无核酸和蛋白质的特征吸收峰，ＩＲ－４００扫描表明有典型多糖吸收峰，Ｄｄ的相对分子质量约为１９６０００。     

棒束孢霉胞外多糖的纯化

棒束孢霉发酵上清液经减压浓缩、醇析、蛋白酶法与Ｓｅｖａｇ法结合脱蛋白、逆向流水透析和ＤＥＡＥ－ＳｅｐｈａｄｅｘＡ－５０柱层析等步骤，获得了胞外纯多糖。用ＴＬＣ、ＧＣ及ＩＲ分析表明，该多糖链由Ｄ－甘露醇和Ｄ－半乳糖组成。     

狭基香茶菜水溶性多糖的分离纯化及组成的定性研究

狭基香茶菜干燥后经水提取、醇沉淀再经ＳｅｐｈａｄｅｘＧ－１５０柱色谱纯化,分离得到４种狭基香茶菜水溶性多糖ＡＲＰ、ＡＲＰ－２、ＡＲＰ－３和ＡＲＰ－４;采用ＳｅｐｈａｄｅｓｘＧ－２００柱层析,琼脂糖凝胶电泳等方法证明为均一性多糖组分,用凝胶谱法测得相对平均分子质量分别是４２０００、９４００、３４０００和８７００;红外光谱,高效液相色谱等表明,ＡＲＰ－１由Ｌ－鼠李糖、Ｄ－１葡萄糖组成,糖残基以α１,２     

短裙竹荪子实体酸提水溶性多糖的研究：Dd—2DE的分离纯化和？…

短裙竹荪（Ｄｉｃｔｙｏｐｈｏｒａ ｄｕｐｌｉｃａｔａ）子实体干品的３％三氯乙酸提取液经乙醇分级、ＤＥＡＥ－纤维素等进一步纯化得到水溶性多糖Ｄｄ－２ＤＥ．经ＳｅｐｈａｄｅｘＧ－２００柱层析和聚丙烯酰胺凝胶电泳鉴定，Ｄｄ－２ＤＥ为均一级份。纸层件和气相层析表明，Ｄ－葡萄糖、Ｄ－半乳糖、Ｄ－甘露糖、Ｌ－岩灌糖和Ｄ－木糖为多糖的组份，其单糖尔比为０．４７：１．７２：１．００：０．１８：０．２１．Ｄｄ－２Ｄ     

裂褶多糖的结构研究

从裂褶菌Ｓｃｈｉｚｏｌｈｙｌｌｉｍ ｃｏｍｍｕｎｅ Ｆｒ．菌株的菌丝体，提取水溶多糖、醇析，Ｓｅｖａｇ法脱蛋白，透析，再径Ｓｅｐｈａｄｅｘ Ａ－５０，Ｓｅｐｈａｄｅｘ Ｇ－２００柱层析纯化，得裂褶多糖Ｓｐｇ（１），用酸水解，部分酸水解，酶解，ＰＣ、ＴＬＣ、ＧＣ、ＩＲ、Ｈ－ＮＭＲ、ＮａＩＯ４氧化，Ｓｍｉｔｈ降解等分析，证是Ｓｐｇ是一种β－葡聚糖，主链β（１→３）连接，支链β（１→６）接连，分子量１０     

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.     

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.     

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.