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1.
目的 建立小儿鼻炎片的质量标准. 方法采用薄层色谱法对小儿鼻炎片中的白芷、升麻、和防风等药材进行了薄层色谱鉴别;采用高效液相色谱法测定了君药藁本药材中阿魏酸的含量,色谱柱为Agilent ZORBAX SB-C18(250mm×4.6mm,5μm)分析柱;流动相:甲醇-0.1%磷酸溶液(25∶ 75);流速:1.0mL/min;检测波长:320nm;柱温:40℃.结果 薄层色谱法可鉴别出该制剂中的白芷、升麻、和防风.阿魏酸在0.028 8~5.67μg范围内有良好的线性关系,r=0.999 5,平均回收率为100.6%,RSD为1.54%(n=6).结论 该方法准确、灵敏、重复性好,能有效地控制小儿鼻炎片的质量.  相似文献   

2.
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.  相似文献   

3.
金水六君煎对老年小鼠气管粘膜影响的研究   总被引:2,自引:0,他引:2  
研究金水六君煎对老年小鼠气管气膜的影响。方法:用金水六君煎为老年鼠灌胃,取小鼠气管,在扫描电镜下观察气管内粘膜及纤毛的情况。结果:与对照组比较,金水六君煎组老年小鼠气管内粘膜上皮及纤毛脱落,纤毛倒状、粘连轻于对照组。结论:金水六君煎可防止老年小鼠气管内粘膜上皮及纤毛的脱落,纤毛的倒状及粘连  相似文献   

4.
高效液相色谱法测定当归中阿魏酸的含量   总被引:2,自引:0,他引:2  
目的:建立一种高效液相色谱法测定当归中阿魏酸的含量.方法:采用高效液相色谱法,色谱柱为TIANHE C18(250 mm×4.6 mm,5μm),以甲醇-水-冰醋酸(40∶60∶0.5)为流动相,流速为1 mL/min,检测波长为320 nm.结果:阿魏酸在0.036~0.216μg范围内,线形关系良好(r=0.9999),平均回收率为101.4%(n=5),RSD为0.76%.结论:该方法测定阿魏酸含量简便、快捷、准确.  相似文献   

5.
利用高效液相色谱法(RP-HPLC-DAD), 建立同时测定陈皮中3,5,6,7,8,3′,4′-七甲氧基黄酮、 8-羟基 3,5,6,7,3′,4′-六甲氧基黄酮和5-羟-3,6,7,8,3′,4′-六甲氧基黄酮质量分数的定量分析法, 并采用Cosmosil C18-Ar-Ⅱ(4.6 mm×250 mm, 5 μm)色谱柱, V(乙腈)∶V(ρ(醋酸)=0.2%)为流动相进行梯度洗脱, 流速为1.0 mL/min, 检测波长为258 nm, 柱温25 ℃. 结果表明: 3,5,6,7,8,3′,4′ 七甲氧基黄酮的线性范围为0.01~10.0 μg(r2=0.999 2), 平均回收率为99.7%, 相对标准偏差(RSD)为0.50%; 8-羟基-3,5,6,7,3′,4′-六甲氧基黄酮的线性范围为0.05~10.0 μg(r2=0.999 4), 平均回收率为1018%, RSD为2.0%; 5-羟基-3,6,7,8,3′,4′-六甲氧基黄酮的线性范围为0.025~5.0 μg(r2=0.999 8), 平均回收率为100.2%, RSD为1.7%.  相似文献   

6.
建立以高效液相色谱法测定妇炎净软胶囊中阿魏酸含量的方法。色谱柱为Diamonsil C18(5μm,250×4.6mm,5μm);流动相为甲醇-1%醋酸(35:65);流速1ml.min-1;检测波长:320nm。阿魏酸的线性范围是0.05055~0.4044μg(r=0.9999),平均回收率为100.4%,RSD=1.45%(n=5)。本方法简便、快捷、结果准确,可用于妇炎净软胶囊的质量控制。  相似文献   

7.
目的:建立保和片中橙皮苷的HPLC分析方法.方法:采用Diamonsil C18(5μm×250mm×4.6mm)色谱柱,以乙腈-5%四氢呋喃-冰醋酸(10:90:2)为流动相洗脱,流速为1.0mL/min,检测波长为283nm,柱温为35℃.结果:橙皮苷在0.2008~2.4096μg的范围内线性关系良好,相关系数r为0.9999;橙皮苷的平均加样回收率分别为100.84%(RSD=1.4%)结论:本方法科学准确,重现性好,结果稳定,可有效地控制保和片的质量.  相似文献   

8.
高效液相色谱法测定胃苏颗粒中橙皮苷和柚皮苷含量   总被引:1,自引:0,他引:1  
目的:用高效液相色谱法测定胃苏颗粒中橙皮苷和柚皮苷的含量。方法:采用DiamonsilTMC18(4.6 mm×150mm,5μm)色谱柱;乙腈-磷酸水(pH=3.5)(22:78,V/)为流动相,流速为1.2 mL/min;.检测波长为283 nm。结果:待测组分与其他组分分离度良好(R>1.5),橙皮苷和柚皮苷线性范围分别为0.25~1.49μg和0.093~0.56μg,橙皮苷和柚皮苷的平均回收率分别为99.2%,98.8%,RSD分别为1.6%,2.3%。结论:高效液相色谱法是测定胃苏颗粒中橙皮苷和柚皮苷成分的一种简便、有效的方法。  相似文献   

9.
目的:观察金水六君煎对慢性支气管炎小鼠呼吸道纤毛的保护作用。方法:将小鼠随机分为对照组、模型组、金水六君煎治疗组,采用改良烟熏法复制慢性支气管炎小鼠模型,以金水六君煎口服液进行干预,连续用药4周后取气管和肺叶组织分别在扫描电镜和透射电镜下观察。结果:模型组小鼠呼吸道纤毛出现明显脱落、减少、倒伏、粘连、变短、肿胀、超微结构异常增多等病理现象,纤毛细胞出现变性、坏死、脱落等病理改变;而金水六君煎治疗组小鼠呼吸道纤毛上述病理改变均较模型组明显减轻。结论:金水六君煎能明显改善慢性支气管炎小鼠呼吸道纤毛的病理损伤程度,促进呼吸道受损纤毛的结构修复。  相似文献   

10.
建立了RP-HPLC法测定紫油厚朴药材中和厚朴酚及厚朴酚的含量.采用依利特ODS2 C18(200 mm×4.6mm,5μm)色谱柱,以甲醇∶水=75∶25(V/V)为流动相,检测波长294 nm,流速1.0 mL/min,柱温25℃.结果得到厚朴酚的平均回收率为98.10%,RSD为0.42%,和厚朴酚的平均回收率为99.86%,RSD为0.86%.该方法重复性好、精密度高、线性关系良好,快速、准确;为紫油厚朴药材品质评价、品种选育及含量控制提供了科学依据.  相似文献   

11.
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.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
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.  相似文献   

13.
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。  相似文献   

14.
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.  相似文献   

15.
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-  相似文献   

16.
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-  相似文献   

17.
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  相似文献   

18.
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  相似文献   

19.
<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  相似文献   

20.
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