HPLC法测定姜状三七根茎中的人参皂苷Rg1、人参皂苷Rb1和三七皂苷R1

 建立人参属植物姜状三七根茎中人参皂苷Rg₁、人参皂苷Rb₁和三七皂苷R₁的含量测定方法.采用HPLC法,色谱柱为Phenomenex C18(250 mm× 4.6 mm,5 μm);流速为1.0 mL/min;检测波长203 mm;柱温30 ℃;流动相为乙腈-水(梯度洗脱).三七皂苷R₁的线性范围为0.315~1.575 μg(r= 0.999 1),平均回收率为三七皂苷R₁101.4%,RSD=1.79%;人参皂苷Rg₁的线性范围为1.203~6.015 μg(r=0.999 8),平均回收率为人参皂苷Rg₁98.54%,RSD=1.90%;人参皂苷Rb₁的线性范围为0.276~1.38 μg(r=0.999 6),平均回收率人参皂苷Rb₁102.10%,RSD=1.53%.所建方法简便、准确、重复性好,可同时测定姜状三七根茎中人参皂苷Rg₁、人参皂苷Rb₁和三七皂苷R₁的含量.     

三七花颗粒的质量控制方法

【目的】完善三七花颗粒制剂的质量控制标准。【方法】采用薄层色谱法对三七花颗粒进行定性鉴别,并用高效液相色谱法对颗粒中的人参皂苷Rb3进行定量测定。【结果】三七花颗粒供试品与对照品及药材在薄层色谱中相应的位置上,显现相同颜色的荧光斑点;人参皂苷Rb3在0.505~5.050μg成良好线性关系(r=0.999 9),平均回收率为101.25%,RSD为0.54%(n=6)。【结论】该方法简便、准确,可用于三七花颗粒质量的控制。     

苦瓜酒中皂苷的含量测定

目的:测定苦瓜酒中皂苷的含量。方法:以人参皂苷和β-谷甾醇为对照品,香草醛-高氯酸分光度法测定皂苷含量。结果:人参皂苷在0.030~0.240 mg范围内线性关系良好(r=0.999 1),平均加样回收率为99.6%,RSD=2.5%(n=6),样品含量在0.151 1～0.563 0 mg;β-谷甾醇在0.015~0.116 mg范围内线性关系良好(r=0.999 3),平均加样回收率为100.9%,RSD=2.6%(n=6),样品含量在0.065 6～0.247 9 mg。结论:β-谷甾醇和人参皂苷均可作为测定苦瓜皂苷含量的对照品,方法准确可靠,可用于苦瓜酒的质量控制。     

RP-HPLC法测定辽东楤木皂苷X的含量研究

采用RP-HPLC分析方法测定辽东槐木叶总皂苷中辽东楤木皂苷X含量.以Hypersil C18(250 mm×4.6 mm,5μm)色谱柱为吸附剂,V(乙腈):V(水)=3:7为流动相,测定了辽东楤木皂苷X.结果表明:进样量在2.5～6.5μg范围内辽东槐木皂苷X与其峰面积呈良好的线性关系,回归方程为y=170.098 x-33.40(r=0.999 4),平均加样回收率为97.61%.     

HPLC法测定调经养颜胶囊中人参皂苷Rg1的含量

目的:建立高效液相色谱法测定调经养颜胶囊中人参皂苷Rg1的含量。方法:用Hypersil BDS C18(5μm4.6×250mm)色谱柱,乙腈-0.05%磷酸溶液(21:79)为流动相,流速1.0mL/min;检测波长:203nm。结果:人参皂苷Rg1的进样量在3.012μg～7.028μg范围内线性关系良好(r=0.9997),平均加样回收率为99.22%(RSD=0.98%),符合分析要求。结论:对样品的测定条件进行了优选,为调经养颜胶囊中人参皂苷Rg1的测定提供了一种准确可靠的HPLC方法。     

HPLC法测定重楼块根中4种重楼皂苷含量研究

建立HPLC测定重楼块根中4种重楼皂苷含量的方法。结果表明:重楼皂苷Ⅰ质量浓度在0.054~0.540 mg·mL^-1范围内线性关系良好,r=0.999 6 (n=5),回收率为99.12%,RSD为1.95%;重楼皂苷Ⅱ质量浓度在0.043 4~0.434 mg·mL^-1范围内线性关系良好,r=0.990 8 (n=5),回收率为99.10%,RSD为1.89%;重楼皂苷Ⅵ质量浓度在0.012 6~0.126 mg·mL^-1范围内线性关系良好,r=0.993 3 (n=5),回收率为99.46%,RSD为2.01%;重楼皂苷Ⅶ质量浓度在0.010 3~0.103 mg·mL^-1范围内线性关系良好,r=0.999 1 (n=5),回收率为96.52%,RSD为2.25%。HPLC法能够准确检测出重楼块根的主要皂苷成分及其含量,且操作简便,可为重楼中4种主要皂苷含量的检测提供科学方法。     

小鼠血浆中三七皂苷C质量浓度的测定方法

给出了血浆中三七皂苷C质量浓度的测定方法:采用甲醇提取法从血浆中提取三七皂苷C,以原人参二醇为内标物;采用RP-HPLC法测定质量浓度,用ODSC18色谱柱(4.6mm×250mm,5μm),以V(甲醇)∶V(水)=90∶10为流动相,流速1.0mL/min,检测波长203nm.结果表明:三七皂苷C和原人参二醇的保留时间分别为13.6min和23.6min,色谱峰之间达到基线分离,且不受空白血浆中其他成分的干扰;日内精密度RSD均小于4.38%,日间精密度RSD均小5.22%,方法回收率为95.2%～99.1%.     

超声提取-分光光度法测定断血流总皂苷含量

目的对比研究回流法和超声法提取并测定断血流中的总皂苷。方法采用分光光度法直接测定不同产地断血流皂苷的含量。结果断血流皂苷在48.8~488μg范围内有良好线性关系(r=0.999 4),总皂苷平均回收率为102.40%,RSD为1.01%(n=3)。结论超声提取法具有简便、快速的特点,分光光度法测定结果准确可靠,重复性好,可用于对药材进行质量控制。     

HPLC法测定珠子参中人参皂苷Rd的含量

采用反相高效液相色谱检测法测定了珠子参中人参皂苷Rd的含量。色谱柱为Zorbax extend-C 18柱(250mm×4.6 mm,5.0μm),流动相为乙腈-水(35:65),流速为1.0 mL·min-1,检测波长为205 nm。结果表明:人参皂苷Rd浓度在11.0~110.0μg·mL-1范围内线性关系良好,平均回收率(n=6)为97.2%(RSD=2.5%)。该法快速、灵敏、准确,可为珠子参的质量控制以及综合利用提供科学依据。     

不同生长年限三七中人参皂苷Rg1、Rb1的含量比较

比较不同生长年限三七的不同部位中人参皂苷Rg1、Rb1的含量变化规律。以高效液相色谱-蒸发光散射检测(HPLCELSD)法,采用YMC-Pack Pro C18色谱柱(250 mm×4.6 mm,5μm),流动相为水(含0.5%醋酸)-乙腈梯度洗脱,流速为1.5 mL/min;检测不同生长年限三七的不同部位中人参皂苷Rg1、Rb1的含量。不同生长年限三七中人参皂苷Rg1、Rb1的含量存在明显差异。所得数据可为三七的采收及合理利用提供参考。     

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.