HPLC法测定马钱子缓释片中士的宁与马钱子碱

建立以高效液相色谱法同时测定马钱子总生物碱缓释片中士的宁和马钱子碱质量浓度的方法.色谱柱为Diamonsil C18(250 mm×4.6 mm,5μm),流动相为甲醇-水-乙酸-三乙胺(76∶ 230∶2.4:0.3),检测波长为254 nm,流速为1.0 mL/min,柱温为30℃.士的宁与马钱子碱分别在1.2 ～14.4μg/mL和1.0 ～ 12.0 ug/mL质量浓度范围内与峰面积呈良好线性关系,平均回收率分别为99.58％、99.91％,RSD分别为0.57％、1.15％.本方法简便、准确、专属性强,可用于该制剂的质量控制.     

RP-HPLC法测定复方岩白菜素片中岩白菜素的含量

建立了复方岩白菜素片中岩白菜素含量测定的反相高效液相色谱法.采用色谱柱Diamonsil C18(5μm,4.6 mm×250 mm),柱温为30℃;流动相为V(乙腈)∶V(水)=15∶85;流速为1.0 m L·min-1;检测波长272 nm.研究结果表明:岩白菜素在28.32~226.56μg/ml的范围内呈良好的线性关系,样品平均回收率为100.86%,RSD=0.89%.该方法操作简便,快速,具有良好的稳定性和重复性,适用于复方岩白菜素片中岩白菜素含量测定.     

RP-HPLC法同时测定通窍鼻炎片中5种成分

建立RP-HPLC法同时测定通窍鼻炎片中花椒毒酚、水合氧化前胡素、白当归素、欧前胡素和异欧前胡素的含量。Agilent TC-C18色谱柱(4.6 mm×250 mm,5μm),流动相为0.2%甲酸水(A)—乙腈(B),梯度洗脱(0~42 min,22%B;43~72 min,50%B);柱温30℃;进样量50μL,流速1.0 m L/min;检测波长为254 nm。花椒毒酚在0.163~5.216μg/m L(r2=0.999 8),水合氧化前胡素在0.699~22.356μg/m L(r2=0.999 5),白当归素在0.375~11.988μg/m L(r2=0.999 8),欧前胡素在1.617~51.744μg/m L(r2=0.999 3),异欧前胡素在0.869~27.784μg/m L(r2=0.999 8)质量浓度范围内与峰面积具有良好的线性关系,平均回收率均大于95%。该方法准确可靠,可行性及重复性良好,可作为通窍鼻炎片的质量控制方法。     

柱后碘衍生—高效液相色谱法测定脂必妥片中黄曲霉毒素B1的含量

为建立测定脂必妥片中黄曲霉毒素B1含量的高效液相分析法,样品经80%甲醇溶液超声提取后,通过免疫亲合柱净化、柱后碘衍生化,以荧光检测器检测,采用Waters Sunfire C18色谱柱(4.6 mm×250 mm,5μm);甲醇—乙腈—水(40∶18∶42)为流动相;流速,0.8 m L/min;柱温,25℃;衍生溶液为0.05%的碘溶液,衍生化泵流速,0.3 m L/min,衍生化温度70℃;激发波长λex=360 nm,发射波长λem=450 nm.结果显示,黄曲霉毒素B1在0.0008~0.0040 ng(r=0.9999)范围内呈良好的线性关系;回收率为97.13%(RSD=0.73%),检出限为0.5μg/kg.本方法简便,结果准确可靠,适于测定脂必妥片中黄曲霉毒素B1的含量.     

HPLC法测定脑血栓片中丹酚酸B含量

采用高效液相色谱法测定脑血栓片中的丹酚酸B含量,利用C18色谱柱(4.6 mm×150 mm,5μm),流动相为乙睛-0.2%磷酸(21:79),流速为1.0 mL/min,检测波长λ=286 nm,柱温40℃,结果表明丹酚酸B检测浓度在0.031 76～1.985μg(Y=967.602 7X-2.419 1)范围内与峰面积值线性关系良好(r=0.999 9),平均回收率为100.39%(RSD=0.62%).本方法灵敏、简便、重现性好,结果准确,可用于脑血栓片的质量检测.     

HPLC法测定小儿导赤片中大黄素含量

目的:建立用高效液相色谱(HPLC)法测定小儿导赤片中大黄素的含量.方法:采用HPLC法,色谱柱为Agilent ZORBAXSB-C18(4.6mm×150 mm,5μm),流动相为甲醇-0.1%磷酸水溶液(80:20),流速为1.0 ml/min,柱温为30℃,检测波长为254nm.结果:大黄素在0.04～0.4μg(r=0.999 9)范围内有良好的线性关系.大黄素平均回收率分别为98.25%.结论:该方法操作简便、快速、结果准确可靠.     

论RP-HPLC法测定前列舒通片中小檗碱的含量

建立测定前列舒通片中小檗碱含量的RP-HPLC法。方法:采用UltimateTMAQ-C18柱(4.6mm×250mm,5μm),柱温25℃,保护柱(4.6mm×12mm);流动相为乙腈-0.1%磷酸溶液(50:50)(每100ml加十二烷基磺酸钠0.1g);流速1.0ml·min-1;检测波长为265nm。结果:盐酸小檗碱进样量在0.0904~1.356μg范围内具有良好的线性关系,r=0.9999,平均回收率(n=6)为98.0%,RSD为0.8%。结论:该方法简便、准确、灵敏度高、重现性好。     

HPLC法测定清热宁肾胶囊中盐酸小檗碱的含量

采用高效液相色谱法测定清热宁肾胶囊中盐酸小檗碱的含量,其Dikma C18色谱柱(250×4.6 mm,5μm),流动相为乙腈—0.1%磷酸溶液(50∶50)(每100 mL含0.1 g十二烷基磺酸钠),流速为1.2 mL/min,柱温为30℃,检测波长为265 nm.实验结果显示:盐酸小檗碱在0.082~2.05μg范围内线性关系良好(r=0.9999),平均回收率为99.62%,RSD为1.86%(n=6),3批清热宁肾胶囊中盐酸小檗碱的含量分别为2.68mg/粒、2.76 mg/粒、2.72 mg/粒.方法操作简便、准确,重复性好.     

RP-HPLC法测定复方硫酸亚铁叶酸片中阿魏酸的含量

目的建立RP-HPLC法测定复方硫酸亚铁叶酸片中当归药材的活性成分阿魏酸的含量方法,为该品种的质量标准提高提供技术参考。方法用0.02 g/mL NaOH-70%(体积分数)甲醇溶液回流样品0.5 h提取阿魏酸。采用高效液相色谱法,色谱柱为Diamonsil C18(5μm,150 mm×4.6 mm),以乙腈-0.085%(体积分数)磷酸溶液(20∶80,体积比)为流动相,流速为1.0 mL/min,检测波长为320nm,柱温为30℃,进样量为20 uL。结果回归方程为:Y=5 542 676X-47 884(相关系数r=0.999 5),阿魏酸在0.062 25~0.373 5μg范围内呈良好的线性关系;平均加样回收率为98.96%,RSD为1.25%(n=9)。结论该方法操作简单,精密可靠,重现性好,为控制复方硫酸亚铁叶酸片中当归药材的质量提供了重要依据。     

复方肝舒丸的质量标准研究

目的:建立复方肝舒丸的质量标准.方法:采用薄层色谱法对丸剂中的丹参、大黄、当归、白术进行定性鉴别.采用高效液相色谱(HPLC)法测定丸剂所含丹参酮ⅡA的量,色谱柱为Welchrom-C18柱(5μm,250 mm×4.6mm),流动相为甲醇-水(体积比80∶20),流速1.0 m L·min-1,柱温30℃,检测波长为270 nm.采用HPLC法测定大黄素、大黄酚的含量,色谱柱为Welchrom-C18柱(5μm,250 mm×4.6 mm),流动相为甲醇-0.1%磷酸溶液(体积比90∶10),柱温25℃,流速1.0 m L·min-1,检测波长为254 nm.结果:薄层斑点清晰,阴性对照无干扰,专属性强.丹参酮ⅡA在0.02~0.2μg范围内线性关系良好(r=0.9999),平均加样回收率为99.26%,RSD为0.66%(n=9).大黄酚在0.2~2.0μg范围内线性关系良好(r=0.9999),平均加样回收率为99.21%、RSD为0.72%(n=9).大黄素在0.2~2.0μg范围内线性关系良好(r=0.9999),平均加样回收率为99.21%,RSD分别0.61%(n=9).结论:本方法操作简单、灵敏度高、结果准确、重现性好、专属性强,可作为复方肝舒丸的质量控制标准.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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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     

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