HPLC测定妇炎净软胶囊中阿魏酸的含量

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Diamomil 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。     

体液中肌酐含量1H-NMR法测定初探

利用^1H-NMR技术对肌酐的测定可行性进行了研究，建立了测定尿液中肌酐的方法．方法的检出限为0．021mmol／L，线性范围为0.0-15．0mmol／L，精密度为0．23％，回收率为96％-104％．与传统的尿肌酐测定方法相比，本方法具有快速、简单、不破坏样品等优点。     

一株产絮凝剂无花果沙雷氏菌的条件优化

从土壤中筛选得到了1株絮凝效果较好的微生物絮凝剂产生菌——无花果沙雷氏菌,其产生的絮凝剂对高岭土悬液的絮凝活性达94．1％．对该菌株进行了培养条件的优化．实验表明该菌株生产絮凝剂的适宜碳源为乳糖,氮源为酵母膏和尿素,pH为6．0～8．0,无机盐为0．2％的K2HPO4和0．5％的KH2PO4,接种量为1．0％,培养时间为3d,条件优化后絮凝活性达到96．0％．     

新疆红景天中红景天苷含量的测定

用反相高效液相色谱法，流动相为甲醇-0．1mol／L磷酸二氢钠(15：85)，紫外检测波长为280nm，流速1．0mL／min，测定新疆产红景天中红景天苷含量，结果表明，红景天苷对照品在10～320μg/mL内线性关系良好，r=0．999。平均加样回收率为96．5％；RSD为3．4％。稳定性良好。该法简便，分离完全，结果可靠，适用于红景天苷的含量测定。     

油田水中甲酸和乙酸的低压离子色谱检测

为避免油田水中大量的氯离子对甲酸和乙酸测定的干扰，采用减压蒸馏的新方法来处理待测试样，不仅消除了氯离子的干扰，而且回收率较高，在95．0％－97．5％之间，用低压离子色谱法（LPIC）分析试样并进行了线性、精密度、回收率和干扰试验，结果表明方法的回收率在96．0％－100％之间，相关系数分别为0．9998和0．9989，变异系数小于1．8％，检测限小于0．1μg/mL。     

高效液相色谱法测定固齿散中阿魏酸的含量

应用高效液相色谱法对中药固齿散中阿魏酸的含量进行了测定，样品采用超声波提取后，再转溶水中，乙醚萃取，最后以甲醇溶解并定容。本法可测定多种混合中药中的阿魏酸物含量，有效地排除药物中其它成分的干扰，方法简便、快速、准确、分离效果好，平均回收率９６．２％，变异系数为２．１％。     

硫脲-碘化钾-马钱子碱分光光度法测定矿石中的铋

研究了在柠檬酸存在的硫酸介质中,矿石中的铋与硫脲-碘化钾-马钱子碱络合染色,用三氯甲烷在室温及100r／min条件下震荡4min萃取其络合物．络合物的最大吸收峰位于460nm处,Bi（Ⅲ）含量在0～20μg范围内符合比尔定律,回归方程为Y=0．09967＋0．00586X,相关系数r=0．99964．对伊犁尼勒克铜矿矿石溶液进行7次平行测量,结果表明,矿石中原矿、精矿、尾矿铋的含量分别为O．003％、0．00064％、0．0028％,RSD在0．3％～2．O％之间,摩尔吸光系数分别是5．3139×10^4、5．3464×10^4、5．3514×10^4,回收率在96．44％-96．74％之间,该测量方法简便易行．     

柑橘上施保克及其降解产物的GC快速检测

阐述了GC－ECD检测柑橘上施保克及其降解产物残留的快速分析方法，这种方法可以同时处理多个样品且不需大量的玻璃器皿和试剂，药品，比现有的方法更简捷，快速，该方法的检测限为0．002mg/kg，回收率的范围为81．5－96．0％，并用该方法测定了实际样品的动态消解曲线和相关系数。     

原子荧光光谱法测定出口大酱中的砷

采用微波消解进行样品前处理，以硼氢化钾为还原剂，用氢化物发生原子荧光法测定出口大酱中的砷。通过单因素实验，优化了样品消解和测定的条件，线性范围1．0～10．0μg／L，回归方程的相关系数为0．9998，方法的检出限为0．5ng／mL，样品加标回收率96．6％-103．0％。     

土香薷挥发油化学成分的研究

采用水蒸气蒸馏法从土香薷中提取挥发油，出油率为3．2％．利用GC—MS联用方法，在最佳分析条件下，共分离出51个峰，并对其化学成分进行了分析，鉴定出了45个化学成分，鉴定率为88．24％．其主要成分为：百里香酚(thymo1)58．43％、香荆芥酚(carvaerol)19．29％、异己烷(isohexane)2．74％、甲基香荆醚(methyl carvacryiether)2．67％、乙酸牦牛儿酯(geranylacetane)0．96％、甲基百里醚(methyl thymyiether）0．73％、对一聚伞花素(p-cymene)0．34％等．     

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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