D101树脂分离纯化龙胆草多糖的工艺研究

通过优化龙胆草多糖的纯化工艺,来研究D101大孔吸附树脂对龙胆草多糖的吸附和解析性质。利用水提醇沉法提取龙胆草多糖,考察了各因素对D101树脂吸附解析龙胆草多糖效果的影响,确定了分离龙胆草多糖的最佳分离条件。最佳纯化工艺为:上样浓度为4 g/L,上样流速为2 BV/h,上样量为6 BV,解析流速为2 BV/h,解析体积为7.5 BV,解析液为30%乙醇。在此优化的条件下,D101树脂对龙胆多糖的吸附和解析效果较好。经过纯化后多糖纯度从35.15%提高到了56.24%,多糖的回收率为78.21%。结果表明该法合理可行,可用于纯化龙胆草多糖的富集研究。     

AB-8大孔吸附树脂纯化龙胆多糖的工艺优化

用水提醇沉法提取龙胆粗多糖,优化AB-8大孔吸附树脂纯化龙胆多糖的工艺,并研究各因素对AB-8大孔吸附树脂对龙胆多糖的吸附与解析效果,得到龙胆多糖的最佳纯化工艺条件。最佳纯化工艺为:上样浓度为4 mg/m L,上样流速为4 BV/h,上样量为8 BV,解析流速为1 BV/h,解析体积为225 m L,解析液为30%乙醇。经过纯化后多糖纯度从43.94%提高到了78.63%。经过AB-8大孔吸附树脂的提纯,多糖的纯度提高为原来纯度的1.79倍,所以AB-8大孔吸附树脂可用于纯化龙胆多糖。     

菝葜多糖分离纯化工艺研究

为了优选菝葜多糖的分离纯化工艺,以多糖纯度、多糖出膏率与吸附率等为指标,考察醇沉静置温度、醇沉静置时间与大孔吸附树脂型号等因素,确定菝葜多糖的最佳醇沉工艺与大孔吸附树脂纯化工艺。得到菝葜多糖最佳醇沉工艺为取含生药1.0 g/mL的药液,加入乙醇,使乙醇体积分数达到80%,醇沉1次,室温25 ℃静置12 h,抽滤得醇沉物,70 ℃干燥;纯化工艺为采用AB-8型大孔吸附树脂,用1 BV的2.0 mg/mL(以粗多糖计)的上样液,以2 BV/h的流速上样,再用3 BV的纯水以3 BV/h的流速进行洗脱。结果表明该优选工艺稳定可靠,可用于菝葜多糖的分离纯化。     

鸡血藤中总黄酮的大孔树脂纯化工艺

为了探讨大孔吸附树脂纯化鸡血藤中总黄酮的最佳工艺,通过对6种型号大孔树脂的静态实验,筛选出最佳树脂;考察最佳树脂对鸡血藤总黄酮的吸附及洗脱性能,优化工艺参数.结果表明:HZ820为最佳树脂,其纯化总黄酮的优化工艺条件为上样液质量浓度3.31mg/mL,吸附流速4BV/h(1BV为20mL),上样液体积500mL,树脂吸附量达79.31mg/g;以60%乙醇为洗脱剂,洗脱流速3BV/h,洗脱用量5BV,解吸率达92.72%,减压浓缩得鸡血藤总黄酮浸膏,纯度为79.49%.     

响应面法优选泽兰多糖的大孔吸附树脂纯化工艺

目的:考察8种大孔吸附树脂D3520、H103、HPD-100、HPD-700、AB-8、HPD722、S-8、HPD-600对泽兰多糖的纯化效果,以Box-Behnken法优化最佳大孔吸附树脂的最优纯化工艺.方法:以多糖保留率、脱色率、脱蛋白率的加权综合评分为指标,考察大孔树脂、洗脱流速、上样浓度、洗脱剂用量对纯化结果的影响,通过Box-Behnken设计建立响应面模型来优选大孔树脂泽兰多糖的工艺参数.结果:优选的泽兰多糖的大孔树脂纯化工艺为:取HPD-100大孔吸附树脂,泽兰多糖的上样质量浓度为0.03 g/mL,洗脱流速为1.1 mL/min,洗脱体积为40 mL,以此优选工艺纯化后,多糖保留率69.21%,脱色率60.24%,蛋白脱除率75.67%.结论:泽兰多糖的纯化工艺稳定可靠,HPD-100大孔吸附树脂纯化工艺效果良好,适合工业化生产.     

DM-18型大孔树脂分离纯化新疆沙枣果肉中多糖的工艺

本文研究了DM-18型大孔树脂分离纯化沙枣多糖的工艺条件,考察了各因素对分离、纯化沙枣多糖效果的影响,确定了分离沙枣多糖的最佳分离条件。结果表明:在沙枣多糖样品溶液2.0 mg/mL,上样速率为1.5 BV/h,上样液pH值为7.0,上样量为3.0 BV、洗脱剂乙醇浓度为35%、洗脱剂用量为4.0 BV、洗脱速率为1.0 BV/h时,DM-18型大孔树脂对沙枣多糖的动态吸附率和解吸率分别达到90.13%和92.17%,表明该大孔树脂是一种较好的分离纯化沙枣多糖的材料。     

大孔吸附树脂对莲房黄酮的吸附分离特性研究

选择8种大孔吸附树脂,比较其对莲房黄酮的吸附和解吸附效果.在静态吸附试验的基础上,筛选出AB-8树脂进行动态吸附试验.实验结果表明,大孔吸附树脂AB-8对莲房黄酮的最佳层析条件为:样液总黄酮液浓度为1.5mg·mL-1,上样流速3BV/h,调节样液pH为3.5上样,以70％的乙醇浓度洗脱,洗脱流速2BV/h.     

刺五加中刺五加总苷的大孔树脂工艺精制研究

目的：筛选刺五加总苷的大孔树脂纯化工艺。方法：以紫丁香苷为对照,采用分光光度法,通过刺五加总苷对5种大孔树脂的静态吸附及解析效果考察,筛选出适合纯化刺五加总苷的大孔树脂,进而通过动态吸附及解析的条件对纯化刺五加总苷的工艺进行优化。结果：D-101型大孔树脂适合纯化刺五加总苷,优化后的最佳富集工艺条件为：上样液质量浓度为0.3 g·ml-1,上样量为50 ml/10 g树脂,依次用7倍树脂体积量水及75%乙醇进行洗脱,浓缩干燥乙醇洗脱液,得刺五加总苷。刺五加总苷转移率达60%以上。结论：本方法适合刺五加总苷的富集。     

大孔吸附树脂对莲房黄酮的吸附分离特性研究

选择8种大孔吸附树脂,比较其对莲房黄酮的吸附和解吸附效果。在静态吸附试验的基础上,筛选出AB-8树脂进行动态吸附试验。实验结果表明,大孔吸附树脂AB-8对莲房黄酮的最佳层析条件为:样液总黄酮液浓度为1.5mg.mL-1,上样流速3BV/h,调节样液pH为3.5上样,以70%的乙醇浓度洗脱,洗脱流速2BV/h。     

大孔树脂分离纯化中药复方多糖的工艺研究

对AB-8型大孔树脂分离纯化中药复方免疫增强剂中多糖的工艺条件进行研究,采用苯酚-硫酸法测定大孔树脂对分离纯化多糖的吸附率、解吸率及影响因素。结果显示:最佳工艺条件为上样液药复方多糖的浓度为5.93mg/mL、速率2BV/h、体积2BV,洗脱液乙醇的体积浓度为50%、速率3BV/h、用量3BV。AB-8型大孔树脂的吸附率、解吸率分别达到71.0%、93.1%,所得多糖含量为79.8%,表明AB-8型大孔树脂对中药复方多糖有较好的分离纯化性能。     

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).     

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.