HPLC法测定蒙药巴特日七昧丸中没食子酸的含量

目的:建立测定蒙药巴特日七味丸中没食子酸含量的方法.方法:采用高效液相色谱法.应用Sphefisorb C18(250mm×4.6mm,5μm)色谱柱;以甲醇-0.1%磷酸水溶液(15:85)为流动相;流速为0.8ml·min-1;检测波长为273nm;柱温为25℃.结果:没食子酸在0.102μg～0.306μg范围内,与峰面积具有良好的线性关系,r=0.999 9;平均回收率为98.89%、RSD为1.41%(n=6).结论:该方法简便、快捷、准确、重复性好,可用于巴 特日七味丸中没食子酸的含量测定.     

HPLC法测定十六味马蔺子丸中没食子酸的含量

建立十六味马蔺子丸中没食子酸的高效液相色谱法的含量测定方法.方法:采用反相HPLC测定十六味马蔺子丸中没食子酸的含量,采用kromasil C18(4.6mm×250mm,5μm)色谱柱,甲醇:水溶液(0.04%的磷酸)=5:95为流动相,流速1ml.min-1,柱温35℃,检测波长为274nm.结果:线性范围:0.0103~0.2064μg.平均回收为97.84%,RSD=1.50%(n=6).结论:该法简便,灵敏度高,重现性好,可作为该制剂的质量控制方法.     

高效液相色谱法同时测定蒙药复方森登-4提取液中没食子酸、原儿茶酸的含量

建立高效液相色谱法同时测定蒙药复方森登-4提取液中没食子酸、原儿茶酸含量的方法.色谱系统为:采用Elite-C18(250mm×4.6mm,5μm)色谱柱,以乙腈(A)-0.3%磷酸水溶液(B)为流动相,柱温27℃,检测波长为270nm,流速为0.7mL/min.本方法可使没食子酸、原儿茶酸有效分离,在检测范围内线性良好,精密度和重复性良好,加样平均回收率分别为100.5%(RSD=1.48%),97.0%(RSD=1.61%).经过方法学验证,该方法可同时、简便、快速、准确的测定蒙药复方森登-4提取液中没食子酸、原儿茶酸的含量.     

藏药二十一味寒水石丸中的总鞣质、没食子酸和鞣花酸的含量测定

目的:建立二十一味寒水石丸中总鞣质、没食子酸和鞣花酸的含量测定方法.方法:以干酪素作为吸附剂,碱性条件下显色,以磷钼钨酸为氧化剂,用紫外可见分光光度法测定鞣质含量;采用HPLC法同时测定没食子酸和鞣花酸的含量.使用迪马Diamonsil-2 C18(4.6 mm×250mm,5μm)色谱柱,以乙腈--0.1磷酸水梯度洗脱,体积流量分别为1.0mL/min,柱温为30℃;检测波长270nm,测定.结果:以没食子酸计的鞣质含量在0.5~5μg?ml-1的范围内线性关系良好(r=0.9991),平均回收率为95.77%,RSD为0.70%(n=6);没食子酸在0.32~1.6μg范围内线性关系良好(r=0.9999),平均回收率为98.70%,RSD为1.01%(n=9),鞣花酸在0.372~.1.86μg范围内线性关系良好(r=0.9999),平均回收率为99.63%,RSD为0.75%(n=9).结论:本方法准确、可靠简便,具有较强专属性,可用于常用藏药二十一味寒水石丸中总鞣质、没食子酸和鞣花酸的含量测定.     

香果健消片质控方法研究Ⅰ:蜘蛛香主要成分的鉴别和含量测定

目的:建立香果健消片中橙皮苷的鉴别和含量测定方法.方法:采用薄层色谱法对橙皮苷进行鉴别;采用高效液相色谱法(HPLC)测定橙皮苷的含量,以Agilent XBP-C18(4.6mmx250mm,5μm)为分析柱,流动相为甲醇-5%冰醋酸(35:65),检测波长283nm.结果:薄层鉴别结果显示,橙皮苷在相应的色谱条件下分离效果良好;HPLC结果显示,橙皮苷在0.202～4.040μg之间线性关系良好(r=0.999 9),平均回收率为100.3%(n=6),RSD为1.28%.结论:此方法简便、稳定,重现性好,可用于本品中橙皮苷的鉴别和含量测定.     

HPLC同时测定虎耳草中的岩白菜素、原儿茶酸和没食子酸的含量

建立了以离子液体1-丁基-3-甲基咪唑六氟磷酸盐([BMIm]PF6)为萃取剂,结合超声辅助萃取,利用高效液相色谱法同时分离测定虎耳草中的岩白菜素、原儿茶酸和没食子酸三种有效成分的方法.方法:采用Phenomenex C18色谱柱(250mm×4.6mm,5μm);流动相为甲醇-0.2%冰醋酸水溶液(20∶80,V/V);流速0.8mL/min;紫外检测波长273nm;柱温为35℃.结果:该方法对岩白菜素、原儿茶酸和没食子酸分别在0.00156～130μg/mL(r=0.99999),0.00172～143μg/mL(r=0.99988),0.00140～116μg/mL(r=0.99993)范围内线性关系良好,相关系数(r)均大于0.9998,定性检测限(S/N=3)依次是:0.1295ng/mL,0.0749ng/mL,0.0277ng/mL;样品回收率为91.10%～98.26%.结论:本法操作简单快速、定量准确、灵敏度高、成本低、且对环境友好,为虎耳草中岩白菜素、原儿茶酸和没食子酸的检测及分离提供了一个有效的科学方法.     

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.     

HPLC法测定蒙药胡日查-6味丸中没食子酸的含量

目的：建立蒙药胡日查-6味丸中没食子酸的高效液相色谱含量测定方法.方法：采用反相高效液相色谱法,色谱柱为Diamonsil C18柱（150mm×4.6mm,5μm）;流动相为0.1%磷酸水溶液-甲醇（96：4）;检测波长为273 nm;流速为1.0ml/min,柱温30℃的条件下进行含量测定.结果：没食子酸在0.135～0.810μg范围内与峰面积积分值呈良好的线性关系.回归方程为Y=2557.2X-14459,r=0.9997,加样回收率为99.05%,RSD为0.83%（n=6）.结论：本法简便、快捷、重复性好,结果准确可靠,可为研究蒙药胡日查-6味丸的质量标准方法的建立提供可靠依据.     

黔产茶叶中儿茶素类成分的HPLC分析研究

建立一种同时测定黔产茶叶中四种儿茶素(表没食子儿茶素没食子酸酯、表儿茶素、没食子儿茶素没食子酸酯和表没食子儿茶素)含量的高效液相色谱分析方法.采用Agilent 1100高效液相色谱仪、Welch色谱柱ultimate XB-C18(4.6 mm×250 mm,5μm),以甲醇-0.1%磷酸为流动相进行梯度洗脱,在流速1 m Lmin-1、柱温35℃、检测波长278 nm的条件下测定了该四种儿茶素的含量,回收率均在98.4%~102.00%之间,各组分回归方程的相关系数均在0.99996以上.该方法选择性好,灵敏度高,重复性好,检测快速准确,适合用于茶叶中儿茶素含量的测定.     

HPLC测定蒙药嘎日迪五味丸中莽草酸和没食子酸的含量

目的：建立同时测定蒙药嘎日迪五味丸中莽草酸和没食子酸的HPLC方法,为该蒙药复方制剂的质量控制提供一种简便、快速、准确的方法.方法：采用岛津LC-10ATVP高效液相色谱仪,色谱柱为ODS2（250mm×4.6mm,5μm）（大连中汇达科学仪器公司）;SPD-10AVP检测器;柱温25℃.结果：莽草酸在0.1～0.5μg,没食子酸在0.05～0.25μg范围内,莽草酸和没食子酸的浓度与相应的峰面积呈良好的线性关系.莽草酸的回归方程为Y=1.0×107 X-2.1×104, r=0.9999;没食子酸的回归方程为Y=9.0×108 X＋3.8×105,r=0.9997,莽草酸、没食子酸的平均回收率分别为101.0%,RSD=1.60%;101.6%,RSD=1.75%.结论：本法简便、快捷、重复性好,结果准确可靠,可为研究蒙药嘎日迪五味丸的质量标准方法的建立提供可靠依据.     

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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