HPLC法同时测定忍冬的花、叶中木犀草苷和绿原酸含量

建立了HPLC法测定忍冬的花、叶中木犀草苷和绿原酸含量的方法。应用Shim-pack ODS色谱柱 (4.6×250 mm, 5 μm),乙腈/0.2 %甲酸水梯度洗脱,流速为1.0 mL/min,检测波长为350 nm。在此色谱条件下,各组分在30 min内均得到良好分离。用该方法测定了3个品种忍冬的花、叶中木犀草苷和绿原酸的含量,结果表明亚特、意大利和九丰一号忍冬叶中木犀草苷含量分别为5.856、2.454和4.633 mg·g^-1,明显高于花。     

野菊叶中绿原酸及木犀草素-7-O-葡萄糖苷测定

建立应用高效液相色谱测定野菊叶中绿原酸及木犀草素-7-O-葡萄糖苷含量的方法.以0.04%磷酸-乙腈为流动相,流速为1.0 mL/min,梯度洗脱,检测波长355 nm,结果表明绿原酸浓度10-100 μg/mL范围内线性关系良好,相关系数r=0.997;平均回收率为96.7%,相对标准偏差(RSD)为0.85%(n=6).木犀草素-7-O-葡萄糖苷浓度1-10 μg/mL范围内线性关系良好,r=0.999;平均回收率为92.6%,RSD为0.63%(n=6).     

HPLC法测定金银花不同部位中木犀草素及其苷的含量

采用高效液相色谱法测定金银花不同部位(花,叶,茎的表皮和茎)中木犀草素及其苷的含量.应用Aglient Zorbax SB-C18色谱柱,以甲醇(φ甲醇=0.02%)-磷酸溶液(φ磷酸=50%)为流动相测定木犀草素,以乙腈(ρ乙腈=0.5%)(A)-冰醋酸溶液(B)按VA∶VB=1∶9,梯度洗脱至3∶7为流动相测定木犀草苷,流速0.3 mL/min,柱温30 ℃,检测波长350 nm.分析结果表明:木犀草素存在于金银花的花,叶和茎的表皮中;木犀草苷存在于金银花的花和叶中.该方法操作简便、结果准确、专属性强,可用于金银花植物中木犀草素及苷的含量测定.     

HPLC法同时测定锡林郭勒产金银花中绿原酸与木犀草苷的含量

目的：建立同时测定锡林郭勒产金银花中绿原酸与木犀草苷含量的方法。方法：采用Agilent ZORBAX SB—C18色谱柱（250mm×4．6ram,5μm）,以乙腈-磷酸水溶液（0．10mol／L）为流动相进行梯度洗脱,流速1．0mL／min,检测波长：绿原酸327nm,木犀草苷348nm,柱温：30℃。结果：锡林郭勒产金银花花蕾中绿原酸含量达1．82％,木犀草苷含量0．125％,均高于2010年版《中国药典》规定含量。     

不同产地金银花中4种黄酮成分的含量测定

目的采用HPLC建立金银花中芦丁、金丝桃苷、木犀草苷、木犀草素4种黄酮成分含量测定的方法,分析不同产地金银花中这4种成分的含量差异,为评价金银花药材质量提供参考。方法色谱柱为Agilent Eclipse XDB-C18(250 mm×4.6 mm, 5μm),流动相为乙腈-0.5%冰醋酸,梯度洗脱,流速1 mL·min~(-1),检测波长350 nm,柱温30℃。结果 4种成分均达到基线分离,线性关系良好(r≥0.9996),平均加样回收率为99.51%～100.35%,RSD2%,建立的方法简便快速,准确度高,重现性好。结论不同产地金银花中芦丁和木犀草苷的含量差异较大,而金丝桃苷和木犀草素的含量均较低,差异较小。本实验为金银花药材的质量评价提供了一定的科学依据。     

RP-HPLC法测定心肌安颗粒中绿原酸和芍药苷

建立RP-HPLC同时测定心肌安颗粒剂中含绿原酸、芍药苷两种有效成分的方法.采用Dia-monsil C18(4.6 mm×250 mm,5μm)色谱柱,以乙腈-0.2%磷酸水为流动相梯度洗脱,流速1.0mL/min,柱温35℃,检测波长230 nm.绿原酸和芍药苷质量浓度分别在20～120μg/mL(r=0.999 9)和30～180μg/mL(r=0.999 8)范围内与峰面积线性关系良好,绿原酸和芍药苷平均加样回收率(n=6)分别为99.38%(RSD=0.96%)和99.91%(RSD=0.82%).三批制剂测定结果显示,含绿原酸量为10.36 mg/g(RSD=0.73%),含芍药苷量为8.18 mg/g(RSD=0.58%).本方法快速、准确,重复性好,可用于同时测定心肌安颗粒剂中绿原酸和含芍药苷的量.     

HPLC测定茵栀黄方剂中4味药材的主要成分及含量

建立HPLC检测茵栀黄方剂中4味药材标准提取物化学成分的分析方法,并测定各提取物中绿原酸、1.3-二咖啡酰奎宁酸、异绿原酸B、异绿原酸A、异绿原酸C、栀子苷、黄芩苷、汉黄芩素、黄芩素、汉黄芩苷、千层纸素A及新绿原酸的含量.采用Diamonsil C₁₈(250 mm×4.6 mm, 5 μm)色谱柱,流动相为乙腈(A)-0.1%(体积分数)甲酸水溶液(B),梯度洗脱,流速 1.0 mL/min,柱温30 ℃.在该色谱条件下主要成分能得到较好的分离,稳定性、重复性及精密度良好,平均加样回收率为98.84% ~ 102.22%.该方法能简便有效地测定4味药材标准提取物中多种成分的含量,结果准确可靠,能为茵栀黄复方药材提取物的质量标准制定提供参考,为其主要化学成分分析提供依据.     

基于UPLC方法同时测定准噶尔柳花中的芦丁、木犀草苷、绿原酸、槲皮素含量

利用UPLC法测定准噶尔柳花中的芦丁、木犀草苷、绿原酸、槲皮素含量。采用色谱柱：ACQUITY UPLC BEH C18 100 mm×2.1 mm,1.7 μm;流动相：乙腈（A） 0.2%乙酸水溶液（B）,梯度洗脱,流速：0.29 mL/min;检测波长：360 nm;柱温：30 ℃。实验结果表明,芦丁线性范围0.05~3.12 μg/mL（r=0.999 8）,平均回收率为99.9%,相对标准偏差为1.6%;木犀草苷线性范围0.03~9.00 μg/mL（r=0.999 5）,平均回收率为98.8%,相对标准偏差为0.8%;绿原酸线性范围0.01~5.00 μg/mL（r=0.999 7）,平均回收率为97.6%,相对标准偏差为1.7%;槲皮素线性范围0.001~0.050 μg/mL（r=0.999 8）,平均回收率为99.0%,相对标准偏差为2.0%。该方法准确可靠,重复性好,可以作为准噶尔柳花的质量控制依据。     

藏药长毛风毛菊中木犀草素和异鼠李素含量快速测定法的建立

目的采用HPLC同时测定长毛风毛菊中木犀草素和异鼠李素的含量.方法 Eclipse XOB-C18（150×4.6mm,5μm）色谱柱,甲醇和水（含0.05%的磷酸）梯度洗脱,流速1mL.min-1,检测波长350nm,柱温35℃.结果木犀草素和异鼠李素的线性范围分别为0.106～5.81μg（r=0.9996）,0.113～6.94μg（r=0.9997）;平均回收率分别为99.14%（RSD=1.47%）和98.96%（RSD=0.99%）.结论该方法可用于藏药长毛风毛菊中木犀草素和异鼠李素含量的同时快速、准确测定.     

木犀草素与木犀草苷的抗炎活性对比研究

研究并比较木犀草素及其糖苷木犀草苷的抗炎活性.角叉菜胶所致大鼠足跖肿胀,醋酸致小鼠腹腔毛细血管通透性增加等体内实验表明木犀草素及木犀草苷具有一定的抗炎活性.木犀草素5 mg/kg组在1 h时对角叉菜胶所致大鼠足跖肿胀具有一定的抑制作用,而木犀草苷无明显的抑制作用;木犀草素20 mg/kg组对醋酸致小鼠腹腔毛细血管通透性增加有显著抑制作用,且作用强度优于木犀草苷20 mg/kg组.进一步以脂多糖(LPS)诱导的小鼠巨噬细胞RAW 264.7细胞株为炎症反应模型,采用MTT法、Griess法、Western blot法考察木犀草素和木犀草苷的抗炎活性并对比二者之间的活性差异.结果显示,木犀草素对LPS诱导RAW 264.7产生炎症介质NO和炎性蛋白iNOS、COX-2蛋白高表达表现出明显的抑制作用;木犀草苷对LPS诱导RAW 264.7细胞iNOS蛋白高表达具有抑制作用,以上实验结果表明木犀草素和木犀草苷具有显著抗炎活性,且木犀草素的抗炎活性在一定程度上优于木犀草苷.     

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.