肉苁蓉中麦角甾苷含量的测定方法

用HPLC法测定肉苁蓉中麦角甾苷的含量.采用Kromasil C18(4.6 mm×250 mm,5μm)色谱柱,以甲醇-水(V(甲醇)∶V(水)=35∶65)为流动相(水中含有0.4 mL/L磷酸)等质洗脱,流速1 mL/min,检测波长331 nm,柱温35℃.检测结果表明:麦角甾苷在0.34~2.04μg范围内呈良好线性关系,回归方程为A=192.57C-2.896(r=0.999 9),平均回收率为98.1%,RSD为1.99%(n=5).本方法用于测定肉苁蓉中麦角甾苷的含量,重现性良好、结果准确可靠.     

黄花列当中麦角甾苷的含量测定

通过TLC和HPLC法对黄花列当中主要化学成分麦角甾苷进行定性鉴别和含量测定的研究,结果证实列当中含麦角甾苷且麦角甾苷在0.0625~2.000μg范围内与峰面积呈良好的线性关系(R2=0.9999),平均加样回收率为95.65%,RSD为1.15%.经过方法学论证,TLC和HPLC专属性强,含量测定方法简便、准确,重现性好,适用于黄花列当中麦角甾苷含量的测定.     

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法测定骨碎补配方颗粒中柚皮苷的含量

目的:建立骨碎补配方颗粒中柚皮苷的含量测定方法.方法:采用高效液相色谱法定量柚皮苷.色谱柱:大连依利特C<,18>反相拄(5μm×250mm×4.6mm).流动相:甲醇-醋酸-水(35:4:65),柱温为35℃,流速:1.0mL/min,检测波长:283nm.结果:HPLC图谱显示,色谱峰形好,分离度高,阴性对照无干扰;供试品在24h内稳定(RSD=0.80%);该方法精密度高(RSD=0.31%),重复性良好(RSD=0.34%),平均加样回收率为96.97%(RSD=0.76%).结论:所建立的方法适合作为骨碎补配方颗粒的含量测定方法.     

HPLC同时测定明目上清片中盐酸小檗碱和黄芩苷的含量

目的:建立同时测定明目上清片中盐酸小檗碱和黄芩苷含量的高效液相色谱方法。方法:Agilent Zorbax Exlipse XDB-C18柱(4.6 mm×250 mm,5μm);柱温为25℃;流动相为甲醇-0.2%磷酸水溶液(45∶55);流速为1.0 mL.min-1;检测波长为265 nm。结果:盐酸小檗碱在1.02~20.40μg.mL-1内线性关系良好(r=0.999 9);黄芩苷在4.54~90.80μg.mL-1内线性关系良好(r=0.999 8);盐酸小檗碱、黄芩苷平均加样回收率为99.2%,101.2%,RSD分别为1.1%和1.6%。结论:本方法简便、准确,重现性好,可用于本制剂的质量控制。     

HPLC法测定鹿龟酒中栀子苷的含量

目的:建立测定鹿龟酒中栀子苷含量的高效液相色谱法.方法:采用Phenomenex Luna C18柱(4.6 mm×250mm,5 μm),流动相为甲醇-水-磷酸(35:65:0.05),柱温:30℃.检测波长为238 nm,流速0.6 mL/min.结果:栀子苷在79.5-556.5 ng范围内线性关系良好(r=0.9998),平均回收率(n=9)为97.95%RSD为1.37%.结论:本方法快速、简单,重复性好,可以作为鹿龟酒中栀子苷的含量测定方法.     

HPLC-ELSD测定强心胶囊中黄芪甲苷质量比

建立强心胶囊中黄芪甲苷的质量比测定方法.色谱柱VP-ODS(4.6 mm×150 mm.5μm)流动相为乙腈-水(34∶66),流速为1.0 mL/min,柱温为35℃,蒸发光散射检测器漂移管温度105℃;氮气流速为2.5 L/min,黄芪甲苷在2.6~13.0μg呈良好的线性关系,r=0.999 5,平均回收率为98.83%,RSD=0.47%.本法方便准确,重复性好,灵敏度高.可用于强心胶囊中黄芪甲苷的质量比测定.     

黔产忍冬叶中木犀草苷含量测定

目的:通过对黔产忍冬叶中木犀草苷的含量进行测定,为拟定忍冬叶的地方标准提供依据。方法:采用高效液相色谱法测定忍冬叶中木犀草苷含量,色谱柱:Agilent ZORBAX SB-Phenyl(250 mm×4. 6 mm,5μm);流动相:乙睛-0. 5%甲酸梯度洗脱;检测波长:350 nm;柱温为35℃;进样量10μL,并记录相应的色谱图。结果:木犀草苷在进样量0. 1646～1. 6460μg,线性关系为y=2023. 8x-39. 58,R²=0. 9997,加样回收率范围为96. 89%～110. 52%,RSD=1. 39%(n=6)。结论:该方法精密、准确、快速、重现性好,通过方法学的系统考察,建立了测定忍冬叶中木犀草苷含量的方法,为忍冬叶药材的质量控制提供参考和依据。     

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.     

HLPC梯度洗脱测定抗荨胶囊中升麻素苷和5-O-甲基维斯阿米醇苷的总含量

目的:建立抗荨胶囊(防风蒺藜蝉蜕黄芪当归白鲜皮等)中升麻素苷和5-O-甲基维斯阿米醇苷含量的高效液相色谱的方法。方法:以WondaSil C18-WR(4.6 mm×150mm,5μm PH 1-10)为色谱柱;流动相采用甲醇(A)-0.05%磷酸溶液(B)梯度洗脱:0~6min,40%B,6~17min,45%(B),17~30min,75%(B),升麻素苷和5-O-甲基维斯阿米醇苷检测波长为254nm,流速为1.0mL·min-1,柱温为30℃,进样量为10μl。结果:用梯度洗脱得到了较好的分离效果,升麻素苷18.4~92.0μg/mL之间线性关系良好,r=0.9999550(n=6);5-O-甲基维斯阿米醇苷在22.0~110.0μg/mL之间线性关系良好,r=0.9996565(n=6),平均回收率分别为100.28%和100.56%。结论:该研究同时进行升麻素苷、5-O-甲基维斯阿米醇苷的定量分析,方法专属性强,准确度高,可用于抗荨胶囊中升麻素苷和5-O-甲基维斯阿米醇苷的含量测定。     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has