TLC测定白芍配伍前后芍药苷的含量变化研究

采用薄层扫描法测定白芍配伍前后芍药苷的含量,展开剂为三氯甲烷∶乙酸乙酯∶甲醇∶氨试液(8∶1∶4∶1),检测波长575 nm,参比波长700 nm.比较白芍单煎液和小建中汤复方煎液中芍药苷的含量变化,探讨小建中汤配伍的合理性.结果发现,该方法的精密度、稳定性和准确度良好,芍药苷在1.93～19.3 μg范围内线性良好,白芍单煎液和复方煎液的方法回收率分别为98.3%和95.9%,单煎液中芍药苷的含量明显低于复方煎液(P＜0.01).表明白芍在小建中汤中配伍可以增加有效成分芍药苷的煎出量.     

亳白芍与赤芍药材中芍药苷含量比较

目的:建立简单、快速、灵敏、准确的HPLC-DAD法测定亳白芍与赤芍药材中芍药苷的含量。方法:采用HPLC-DAD法,ZORBAX SB-C18(250 mm×4.6 mm I.D.,5μm)色谱柱;以乙腈为流动相A,0.10%磷酸水溶液为流动相B;等度洗脱;柱温25℃;检测波长为230 nm;流速为1.0 mL·min-1。分离度R大于1.5,理论塔板数N,按芍药苷计不低于4000。结果:亳白芍和赤芍药材中芍药苷的含量分别为24.43 mg·g-1、32.77 mg·g-1。结论:赤芍药材中芍药苷的含量显著高于亳白芍药材中芍药苷的含量。     

HPLC法测定炎平灌肠液中芍药苷的质量浓度

建立炎平灌肠液中芍药苷的质量浓度测定方法,采用高效液相色谱法,色谱柱采用Kro-masilTMC18柱,流动相为甲醇-0.05 mol/L磷酸二氢钾(40∶65),流速为1.0 mL/min,检测波长为230nm,柱温为室温.芍药苷在0.2~1.0μg范围内与峰面积呈良好的线性关系(r=0.9993),平均回收率99.18%.结果表明,该方法简便、稳定、可靠.可用于炎平灌肠液中芍药苷的质量浓度测定.     

HPLC测定和胃平肝丸中芍药苷的含量

目的:建立高效液相色谱法测定和胃平肝丸中芍药苷的含量.方法:采用高效液相色谱法测定和胃平肝丸中芍药苷的含量.色谱柱:Eclipse XDB-C18(4.6 mm×150 mm,5μm)分析柱;流动相:乙腈-水(11∶89);检测波长:232 nm;流速:1.0 m L·min-1;柱温:30℃.结果:芍药苷与其他成分分离良好;芍药苷进样量在0.12~0.60μg范围内有良好的线性关系(r=0.999 9),平均回收率(n=6)为99.12%.结论:该方法简便、准确,重复性好.     

HPLC法测定坤顺胶囊中芍药苷的含量

用HPLC法测定坤顺胶囊中芍药苷的含量.样品经稀乙醇超声提取后,采用HPLC法测定坤顺胶囊中芍药苷的含量,使用C18色谱柱,乙腈-0.1%磷酸溶液(15∶85)为流动相,检测波长230 nm,流速1 mL/min,柱温40℃.芍药苷线性范围0.1~1.6μg,相关系数r=0.999 0,平均回收率100.1%.样品处理方法合理,方法学考察符合定量要求,结果准确,可用于坤顺胶囊中芍药苷的含量测定.     

痛泻要方分煎液和合煎液有效成分变化分析

对于常见中药复方痛泻要方的分煎液和合煎液中芍药苷和橙皮苷的溶出量采用高效液相色谱法(HPLC)进行分析比较,以确认是否适合采用临床颗粒复配方法使用。发现合煎更有利于芍药苷和橙皮苷的溶出,使得药效更为明显一些。同时对合煎液和分煎液中丹皮酚含量进行测定,均未发现丹皮酚。痛泻要方临床建议采用合煎服用汤剂的方法。     

“白芍-当归”药对中主要成分的肠动力学及影响

考察“白芍-当归”药对中芍药苷、阿魏酸肠吸收动力学及影响因素.采用在体循环灌流法,应用HPLC测定肠吸收循环液中芍药苷、阿魏酸的质量浓度,UV法测定肠吸收循环液中即时酚红质量浓度.芍药苷、阿魏酸分别在0.08～0.64 mg/mL和0.003 ～0.023 mg/mL范围内,各质量浓度的吸收量与药物质量浓度呈良好线性关...     

高效液相色谱法测定脑正清冲剂中芍药苷的含量

建立测定脑正清冲剂中芍药苷含量的高效液相色谱法 .方法 :KromasilC1 8色谱柱 (2 5 0mm× 4 6mm 5 μm) ,以甲醇 水 (2 5∶75 )为流动相 ,流速为 1 0mL min ,检测波长为 2 30nm .柱温 :室温 .结果 :芍药苷在 0 5 0 5～ 4 0 0 0 μg范围内峰面积与其浓度线性关系良好 (r =0 9992 ) ,平均回收率为 98 36 % ,RSD为 1 4 8% (n =5 ) .结论 :该方法准确、简便、快速 ,灵敏度高 ,重现性好     

高效液相色谱法测定五灵颗粒中芍药苷的含量

对五灵颗粒中芍药苷的含量进行测定 .采用KromacilODSC1 8(2 5 0mm× 4 6mm)为固定相 ,甲醇 水 (2 5∶75 )为流动相 ,检测波长为 2 30nm ,柱温为 2 5℃ .该法的RSD为 1 71 % (n =5 ) ,平均回收率为 1 0 0 0 % .     

HPLC法测定丁白贴剂成分含量的研究

建立了采用高效液相色谱法测定丁白贴剂中丁香酚、芍药苷含量的方法,采用Lichrospher C18柱（4.6 mm×150 mm,5 μm）色谱柱,以甲醇 水（52:48,V/V）为流动相,流速 1 mL·min^-1,检测波长 280 nm,柱温30 ℃,测定制剂中丁香酚的含量;以乙腈 水（13:87,V/V）为流动相,流速 1 mL·min^-1,检测波长 230 nm,柱温30 ℃,测定制剂中芍药苷的含量。结果显示丁香酚进样量在0.047 2～0.472 μg范围线性关系良好,R=1.000 0。芍药苷进样量在0.054 6～0.491 4 μg范围线性关系良好,R=0.999 9。该方法简便、重复性好、准确可靠,可作为丁白贴剂的含量测定方法。     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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