气相色谱法测定茴香醛

选用８％ＯＶ－２１０为固定相，间甲苯酚为内标物，测定茴香醛的含量。结果表明，该方法快速、准确、标准偏差〈０．１％，回收率为９８．２￣９９．３５。     

烯效唑的气相色谱分析

采用气相色谱分析烯效唑的含量，选用ＱＦ－１固定液，Ｃｈｒｏｍｏｓｏｒｂ Ｗ．Ｈ．Ｐ为担体，以邻苯二甲酸二丁酯为内标物，该方法标准偏差０．１５％，变异系 ０．１７％，烯效唑的平均回收率为９９．５９％．     

RP—HPLC测定青蒿中青蒿素的含量

采用反相高效液相色谱法，以对羟基苯甲酸乙酯为内标，测定了青蒿中青蒿素的合量。Ｓｈｉｍ－ｐａｃｋＣＬＣ－ＯＤＳ柱，甲醇－醋酸盐缓冲液（０．０１ｍｏｌ／Ｌ，ｐＨ５．８）为流动相，ＵＶ２６０ｕｍ波长处检测。实验结果平均回收率为１０２．２％，相对标准偏差为１．０７％。方法快速、简便、准确。     

毛细管气相色谱法测定706代血浆中残留甲醇、乙二醇的含量

本文采用内标法，以丙二醇为内标物，应用上分１００２型气相层析仪测定羟乙基淀粉代血浆中残留甲醇和乙醇的含量。选用天津试剂二厂弹性石英交联聚乙二醇—２０Ｍ毛细管色谱柱，以氢火焰离子化检测器检测，氮气为载体，分流进样．当甲醇和丙二醇内标物浓度比为０．０２：１～０．３２：１，乙二醇和丙二醇内标物浓度比为１．０：１～４．０：１时，被测物质峰面积与浓度呈线性关系，测定了甲醇和乙二醇的相对定量校正因子．甲醇平均测定回收率为９８．７９％，相对标准偏差ＣＶ＝０．０１３％，乙二醇的平均回收率为９７．７７％，ＣＶ＝０．０１１％．     

气相色谱法测定中成药中冰片的含量

采用正十二烷作内标，选用ＯＶ－１０１的石英玻璃毛细管柱，建立了某药厂中成药胶囊中冰片含量的气相色谱测定方法。与张亮（１９９４）、刘柏年（１９８４）工作相比，不仅大大节约了分析时间，而且分离效果更佳，测定结果的重现性好，标准偏差Ｓ＝０．４０，平均回收率高达９９．０％，内标物与冰片的浓度比为１：０．３－１：１．５时峰面积与浓度成线性关系，相关系数ｒ＝０．９９９７     

气相色谱法测定发酵食品中的游离乳酸

采用气相色谱法单独对发酵方法生产的食品中含有的游离乳酸进行了测定研究，用ＦＩＤ检测器检测。方法的平均标准差为０．０８２－１．８１，变异系数为２．６％－６．２％，平均回收率为９８．１％－１０２．２％。     

气相色谱法测定牛黄清心丸中冰片的含量

本文采用内标法，以正十五烷为内标物，应用气相色谱仪测定牛黄清心丸中冰片的含量。当内标与冰片的浓度比为１：０．５７～１：１．４９时，峰面积与浓度呈线性关系，并测定了冰片的定量校正因子。由实验测得平均回收率达９８％，变异系数ＣＶ＜ｌ％，证明该法适用于蜜丸类中成药中冰片的测定，对不同批号的牛黄清心丸中冰片的含量进行了测定，以比较其在储存过程中冰片的挥发情况。最后，应用ＮＩＣＯＬＥＴ－２０５型红外分光仪对冰片的结构作了定性测定。     

衍生物相色谱法测定银杏外种皮中单糖

研究了衍生气相色谱法测定银杏外种皮中单糖的方法，银杏外种皮经酸性水溶液提取，提取物在盐酸羟胺和乙酸酐的存在下，转化成糖腈乙酰酯衍生物，用肌醇乙酰酯作内标物，ＥＣ－１毛细管柱进行分离，分离效率高，灵敏度高，重现性好。鼠李糖、木糖、甘露糖、葡萄糖、半乳糖的回收率在９４．７％－９９．２％之间，变异系数在３．２５％－６．７４％之间。     

HPLC法测定康希力中氨苄及邻氯青霉素

采用高效液相色谱法（ＨＰＬＣ）对复方康希力胶囊中氨苄青霉素和邻氯青霉素进行测定。以醋酸盐缓冲液（ｐＨ＝４．５）－甲醇（５５：４５）为流动相，流速为１．０ｍＬ／ｍｉｎ；ＹＷＧ－Ｃ＿（１８）（１０μｍ）为固定相；乙酰苯胺为内标；检测波长为２５４ｎｍ。氨苄青霉素、内标物和邻氯青霉素的保留时间分别为３，０、５．５和９．０ｍｉｎ。氨苄青霉素和邻氯青霉素的回收率（ｎ＝５）分别为１００．３％（ＲＳＤ＝０．３７％）和１００．９％（ＲＳＤ＝０．４３％）。两种组分的最低检出浓度为５μｇ／ｍＬ。     

玉米粉直接发酵生产L－乳酸钙

以米根霉（ＲｈｉｚｏｐｕｓＯｒｙｚａｅ）突变株Ｒ－１８８为菌种，直接用玉米粉为原料，在７００Ｌ发酵罐连续进行四批Ｌ－乳酸钙生产试验．平均发酵单耗为每ｋｇＬ－乳酸钙耗玉粉１．０３ｋｇ；平均产酸０．９５２ｍｏｌ·Ｌ－１，产酸速率为１．１８ｇ·Ｌ－１·ｈ－１．Ｌ－乳酸钙平均提取率为８１．８％．     

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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