纯化刺五加总黄酮最佳洗脱工艺研究

采用AB-8大孔吸附树脂和聚酰胺为吸附剂,不同体积浓度的乙醇为洗脱剂,对刺五加总黄酮的最佳纯化洗脱工艺进行研究与探索。实验结果表明刺五加总黄酮最佳纯化洗脱工艺为：AB-8大孔吸附树脂吸附70％乙醇洗脱时洗脱率最高,这些条件的确定为中药刺五加总黄酮的纯化提供了依据。     

AB-8大孔树脂对黑米花色苷的吸附性能研究

利用大孔树脂分离纯化黑米花色苷,得到最佳纯化条件.在最佳提取条件下得到黑米花色苷粗提液,利用AB-8大孔树脂对其进行纯化,研究各个因素对吸附率和解吸率的影响.静态吸附平衡时间为4 h,吸附液pH值为2.0,解吸时间为1.5 h,60%乙醇洗脱效果最佳.动态吸附上样液质量浓度0.5 mg/mL、流速为1.0 mL/min时吸附效果最好,解吸流速为1.0 mL/min、60%乙醇洗脱剂解吸效果最佳.在最佳纯化工艺条件下纯化后的花色苷质量比提高了大约7倍左右,说明AB-8大孔树脂对黑米花色苷具有较好的分离纯化效果.     

D-101大孔吸附树脂纯化苜蓿总皂甙的工艺研究

利用D-101大孔吸附树脂,采用比色法,对富集、纯化苜蓿总皂甙的工艺参数及吸附量的影响因素进行了初步研究.结果表明:当乙醇浓度为70%,吸附时间为2 h时,具有很好的富集、纯化效果;纯化前总皂甙含量为5.67%,纯化后总皂甙含量可达36.02%;并且D-101大孔吸附树脂具有较大的吸附容量,重复使用也可得到较高的吸附量.     

大孔树脂纯化牛舌草总黄酮的工艺优化

利用单因素试验和正交试验优化大孔树脂纯化牛舌草总黄酮的工艺条件.结果表明,影响NKA-9大孔树脂对牛舌草总黄酮吸附能力的各个因素影响力大小为BCA,样品pH值对大孔树脂吸附能力影响显著(P0.05),而乙醇浓度与样品流速对大孔树脂吸附能力影响不显著.确定NKA-9大孔树脂吸附牛舌草总黄酮的最优工艺条件为A1B2C2,即乙醇浓度10%、样品pH值5、样品流速2 BV·h-1.NKA-9大孔树脂对牛舌草总黄酮有较好的纯化效果,且工艺重复性和稳定性良好.     

大孔吸附树脂分离纯化雪莲注射液中总黄酮的工艺研究

选择适用于分离纯化雪莲注射液的大孔吸附树脂和其最佳纯化条件.通过静态吸附与解析和动态吸附与解析对3种大孔吸附树脂进行筛选.实验表明采用DM301型大孔吸附树脂分离纯化效果好,所用三种大孔树脂中的DM301型大孔吸附树脂能更好地分离纯化天山雪莲总黄酮.     

大孔树脂分离纯化玉米苞叶总黄酮方法研究

选择适合玉米苞叶总黄酮纯化的大孔树脂,确定最佳纯化条件.以吸附量和解吸量为指标,采用静态吸附-解吸附方法,筛选最佳树脂;采用动态吸附-解吸方法,确定最佳纯化条件.选择S-8大孔树脂对黄酮的纯化效果较好,吸附平衡时间为5 h,解吸平衡时间为1.5 h,最佳上柱pH值为4～5,以1.0 mL/min的吸附流速上样,再以80...     

大孔树脂纯化天麻多糖的工艺研究

本研究以炮制的干天麻为原料,水提醇沉法提取多糖,大孔吸附树脂纯化,比较了八种大孔树脂(AB-8、D101、LX-17、D301、NKA-9、S-8、LSD-001、ADS-7)对天麻多糖静态吸附-解析效果,筛选出最佳纯化树脂,再研究最佳树脂纯化天麻多糖工艺参数.结果为:八种大孔吸附树脂中D101对天麻多糖的纯化效果最好.样品液浓度、温度、上样速度,洗脱用乙醇浓度、洗脱流速及洗脱体积等因素均对D101树脂吸附分离天麻多糖有影响.所得的最佳纯化工艺为:20℃是较适宜的吸附温度,上样速度1BV/h,上样浓度4mg/mL,进行吸附;吸附饱和平衡后,用解析液浓度60%乙醇,解析速率2BV/h,解析液体积3BV进行动态洗脱.通过该工艺天麻多糖的纯度提高到了65.7%,表明了大孔树脂D101对天麻多糖具有较好的纯化效果.     

沙棘叶中黄酮提取及大孔树脂分离纯化槲皮素

采用响应面的方法对热碱水提取沙棘叶中黄酮的条件进行优化,较佳工艺条件为pH值11.4,温度75.5℃,质量浓度28.6 mg/mL,提取2.0h,产率为1.23％.磷酸沉淀后采用大孔树脂进行纯化,比较了3种大孔树脂AB-8、DM301、HPD-100对沙棘黄酮的纯化效果,最终选出较佳大孔树脂为AB-8,且当上样液浓度为1.0 mg/mL、pH值为6.0、吸附1.0h后,树脂的吸附率达到最大值.最后用3倍柱体积蒸馏水洗脱除去杂质,用不同体积分数乙醇溶液（30％,50％,70％,80％,90％）进行梯度洗脱,并将解吸液用高效液相色谱（HPLC）进行检测,结果显示80％和90％乙醇解吸液中槲皮素纯度均可到达97％以上.     

牛蒡多酚的分离纯化及清除DPPH自由基的研究

文章对牛蒡多酚的纯化条件及清除DPPH自由基活性进行了研究,得出大孔树脂AB-8为最佳处理树脂,上柱流速为1 mL/min、上样初始质量浓度为1.68 mg/mL时吸附量最大,采用70%乙醇以2 mL/min速度解吸附,纯化后牛蒡多酚的质量浓度提高了55.36%.同时,采用电子顺磁共振技术(EPR)检测纯化前后的牛蒡多...     

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。     

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.