HPLC法测定金匮肾气丸中马钱苷、芍药苷的含量

建立一种方法用于同时测定金匮肾气丸中马钱苷、芍药苷的含量．应用高效液相色谱法测定,分离条件Symmetry C18柱（4．6min×250mm,5μm）,乙腈-1％冰醋酸溶液（14：86）为流动相,流速为1mL／min,柱温为30℃、马钱苷、芍药苷线性范围分别为0.16～1.6μg（r=0．9997）,0.18～1.8μg（r=0．9999）,平均加样回收率分别为99.13％（RSD=1．43％）,99.02％（RSD=2．17％）、方法简便,快速,可靠,为金匮肾气丸进一步研究奠定基础．     

酸性高锰酸钾化学发光体系测定针剂中的头孢噻肟钠

头孢噻肟钠碱性水解产物与高锰酸钾反应可产生微弱的化学发光，多聚磷酸对其有强烈的增敏作用，据此建立了一种简单、快捷、灵敏的流动注射化学发光测定头孢噻肟钠的新方法．化学发光信号ICL与头孢噻肟钠质量浓度C在0．02-20μg／mL和20～120μg／mL范围内呈良好的线性关系，回归方程分别表示为ICL=3.169＋20．961C（r=0．9998，n=9）；ICL=147．5＋14．752C（r=0．9994，n=9），方法的检出限为20ng／mL．对5μg／mL头孢噻肟钠进行11次平行测定，相对标准偏差为0．8％，用本法对针剂中头孢噻肟钠的含量进行了测定，得出了令人满意的结果．     

乳香中乙酸辛酯含量的测定

目的：建立气相色谱法测定乳香中乙酸辛酯含量．方法：采用气相色谱法Agilent6890N气相色谱仪,检测器FID,Agilent19091-413HP-5毛细柱（30m×0．32mm×0．25μm）．结果：乙酸辛酯含量在26．40～132．00μg范围内呈良好线性关系（r=0．9993）,平均回收率为100％,RSD为2．76％（n=5）．结论：气相色谱法测定乳香中乙酸辛酯含量方法操作简单,结果准确,重现性好．     

利用胶束电动色谱技术用于抗生素测定

采用毛细管胶束电动色谱技术对阿莫西林、氯唑两林、头孢氨苄、头孢噻肟、头孢唑林5种抗生素进行分离．18kV电压下，在溶有100mmol／LSI）S的硼酸盐缓冲溶液（20mmol／L，pH-8．9）中，采用二极管阵列检测器．在9min内可以完成对此5种抗生素的分离检测．线性范围0．1～250μg／mL．相关系数为0．9976～0．9994，检测限为0．01～0．13μg／mL．运用此方法对3种药物形式的抗生素进行同时检测．日间和日内的RSDs分别为3．95％～8．12％和1．51％～2．86％。迁移时间的日间和日内的RSDs分别为0．47％～1．11％和0.032％～0.295％．在尿样的测定中，日问和日内的RSDs分别为1．31％～6.07％和0.66％～7．65％，回收率为90％～110％．此外．还对分离条件对抗生素的迁移行为的影响做了理论探讨．     

毛细管气相色谱法检测替加环素中有机溶剂残留

建立了毛细管气相色谱法测定替加环素原料药中7种有机残留溶剂的分析方法．采用ZB-624熔融石英毛细管柱（30m×0．53mm×3μm）,FID检测器,以二甲基亚砜为溶剂．其中甲醇、异丙醇、异丙醚、二氯甲烷、四氢呋喃与甲苯的测定采用顶空进样法,柱温40℃保持9min,以20℃／min升温至200℃,保持1min;N,N-二甲基甲酰胺的测定采用直接进样法,柱温100℃保持5min,以20℃／min升温至200℃．结果表明各残留溶剂均能得到有效分离,在所考察的浓度范围内呈良好的线性关系（r=0．9989～0．9999）,平均加样回收率在92．4％～104．8％（RSD=1．41％-5．6％）之间,定量限为0．15—10．19μg／mL,3批样品中7种残留溶剂的量均符合我国药典要求．该方法可用于替加环素原料药中残留溶剂的检测和质量控制．     

用气相色谱法测定液状食品中四种对羟基苯甲酸酯类防腐剂

用毛细管气相色谱法实现了液状食品中4种防腐剂(对羟基苯甲酸甲酯、对羟基苯甲酸乙酯、对羟基苯甲酸丙酯、对羟基苯甲酸丁酯)的分离测定，各组分回收率为91．15～107．7％，检出限为0．5μg／mL，线性范围为0．2μg／mL～80μg／mL．线性相关系数大于0．999。     

毛细管电泳法测定广枣三味胶囊中氧化苦参碱含量

用毛细管电泳法测定了广枣三味胶囊中氧化苦参碱的含量．氧化苦参碱的线性范围为：15．3～102．0μg／ml；相关系数为0．9998；回归方程为Y=0．7635X-3．586；RSD（n=5）分别为0．42％；平均回收率100．45％．该方法简便、快速、结果准确、重现性好．     

反相高效液相色谱法测定金樱子中的芦丁和槲皮素

建立了用反相高效液相色谱法测定金樱子中芦丁和槲皮素的方法．色谱条件：色谱柱Shim-pack VP-ODS 200mm×4．6mm,流动相为甲醇：水（含0．2％磷酸）为60：40的溶液,流速为0．8mL／min,检测波长260nm．结果表明芦丁和槲皮素达到基线分离,分别在0．03-15μg／mL（r=0．9990）和0．04-20μg／mL（r=0．9994）的浓度范围内与峰面积呈良好线性关系,检测限分别为12．6和15．2ng／mL,方法可用于金樱子中芦丁和槲皮素的测定．     

对羟基苯甲醛的GC分析方法研究

应用GC分析建立了对甲酚催化氧化法合成对羟基苯甲醛的主要产物及其副产物和反应液的分析方法，在色谱柱5％ SE-30，检测器为FID，柱温120～220℃，升温速率为8℃／min的条件下，由内标法定量，所得各组分的线性回归方程分别为：对羟基苯甲醛为y=0.0579x 0．4036，对羟基苯甲醚为y=0．0502x 0．4165，对甲酚为y=0．073x 0．3387;相关系数R^2分别为：0．9984，0.9885，0．9932；方法的最低检测限分别为：3．47μg／mL、1．68μg/mL、1．62μg／mL；CV％分别为0．13，0．16和0．08。探索一种针对此类反应进行的中控鉴测和产品的定量分析，以求建立决速、准确的分析方法。     

天山花楸中总黄酮和槲皮素测定

以芦丁、槲皮素为标准品建立了用分光光度法测定天山花楸叶中总黄酮的含量和果实中槲皮素含量的测定方法，分别采用5％ NaNO2～10％Al（NO3）3～4％NaOH和2％AlCl3显色系统，并分别在510nm和422nm处进行了含量测定。结果表明：天山花楸果实中总黄酮为7．75％（RSD％=1．09），在1．596～6．384mg／100mL（R^2=0．9999）范围内，线性关系良好；7月天山花楸叶子中槲皮素为0．777％（RSD％=0．66）、8月其叶子中槲皮素为0．397％（RSD％=0．81），叶子中槲皮素在0．241～0．723mg／100mL（R^2=0．9995）范围内，线性关系良好。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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