动力学荧光猝灭法测定污水中的对硝基酚

建立了动力学荧光法测定对硝基酚的新方法。在盐酸介质中，对硝基酚可以活化钒（V），催化氯酸钾氧化罗丹明6G的反应，使其荧光猝灭。该方法的线性范围为5-50μg/L，检测限为2.5μg/L，回收率为96.5%，可直接用于污水中对硝基酚的测定。     

RP-HPLC法测定克咳胶囊中吗啡含量

目的:为了建立分析测定克咳胶囊中吗啡含量的方法,提高克咳胶囊质量标准。方法:采用RP-HPLC法,色谱柱为Agilent ZORBAX SB-C8,流动相为0.01 mol/L庚烷磺酸钠与0.02 mol/L磷酸二氢钾溶液等量混合(用磷酸溶液调pH至2.8)-乙腈(87∶13),检测波长为210 mm。结果:吗啡的线性范围为9.7943～58.7658μg/mL(R²=0.99993),加样回收率为100.88%(n=6),RSD为0.57%。结论:该方法经过方法学验证,方法简单易操作、结果准确,可应用于克咳胶囊中吗啡的含量测定。     

HPLC电化学检测法测定制药厂废水中硫脲和硫

本文建立了反相离子对液相色谱-电化学检测法同时测定制药厂废水中的硫脲和硫.流动相为10%甲醇+2.0mmol/L四丁基溴化铵(TBABr)+0.02ommol/L EDTA·2Na+0.01mol/LNaH_2PO_4缓冲溶液(pH5.5),流速为1ml/min,柱温40℃,检测电位.5V(vs,Ag/AgCl).工作曲线的线性范围是0—120,μg/ml,检出限为硫脲18μg/L、硫1.5μg/L.样品测定的回收率在97—104%范围内.     

蒽酮—硫酸法测定板栗多糖含量

采用蒽酮—硫酸法测定板栗多糖含量并对其测定条件进行优化。结果表明,蒽酮—硫酸法测定板栗多糖的适宜操作条件为:加入2g/L蒽酮—硫酸溶液4mL,在沸水浴中加热3min,自来水冷却40min后在10min内于波长600nm下读取吸光度。蒽酮—硫酸溶液需要现配现用。多糖含量控制在0.02～0.06g/L之间为宜。蒽酮—硫酸法测定板栗多糖含量的精密度实验RSD值为0.792%,平均加样回收率为107.2%,RSD值为4.6%。用本方法测定板栗中多糖含量为12.67%。     

催化法测定痕量亚硝酸根

基于稀H3PO4介质中NO2-催化KBrO3氧化溴甲酚绿的褪色反应,建立了测定NO2-的催化光度法,该方法测定NO2-的线性范围为0.02～0.25mg/L,检出限为1.1×10-5g/L,此方法简便,灵敏度高,选择性好,用于痕量NO2-的测定,结果满意.     

HPLC法测定三种蒙成药中盐酸小檗碱的含量

目的:采用高效液相色谱法测定以黄柏为主要成分的三种蒙成药(协日毛道-8、特木仁-5、协日嘎-4)中盐酸小檗碱的含量.方法:色谱柱为Xterra(5μm×150 mm×3.9 mm)柱;流动相为甲醇-0.02 mol/L磷酸-水-乙腈(10∶30∶30∶30,V/V);检测波长为345 nm.结果:回归方程y=3.408×106x-1.04×105,r=0.9997,CV(%)=1.03(n=5).线性范围0.005 mg/g~5.450 mg/g.协日毛道-8,特木仁-5,协日嘎-4中盐酸小檗碱的含量分别为0.93 mg/g、0.65 mg/g、2.96 mg/g,平均回收率为98.88%.结论:本方法简便、可靠,适合蒙药中盐酸小檗碱的含量测定.     

紫外分光光度法测定盐酸托莫西汀胶囊的含量

用紫外分光光度法测定了胶囊中盐酸托莫西汀的含量,检测波长270nm.盐酸托莫西汀在0.0400g/L～0.2000g/L的范围内,其紫外吸收值与浓度呈线性关系,回归方程为y=0.1901x-0.0027,R=0.9999平均回收率为100.03%,RSD为0.66%(n=9).方法操作简便快速,准确度高,测定结果与HPLC法相符.     

高效液相色谱法快速测定发酵液中的藤黄绿菌素

应用反相高效液相色谱,以φ=0.7甲醇为流动相,流速1.0mL/min,紫外检测波长308nm,建立了快速测定荧光假单胞菌M18发酵液中藤黄绿菌素(Pyoluteorin)的方法.实验结果表明,藤黄绿菌素在4.9min出峰,线性范围0.02~1g/L,线性范围良好(r=0.9997),最低检测浓度0.01g/L,回收率平均为97.7%.     

8种杀菌剂对雪莲果褐斑病的室内毒力测定

8种杀菌剂对雪莲果褐斑病的室内毒力测定结果表明:供试药剂毒力由高到低依次为325g/L苯甲·嘧菌酯悬浮剂、10%苯醚甲环锉水分散粒剂、206.7g/L噁酮·氟硅唑乳油、125g/L氟环唑悬浮剂、250g/L吡唑嘧菌酯乳油、60%唑醚·代森联水分散粒剂、50%醚菌酯水分散粒剂和46%氢氧化铜水分散粒剂。以325g/L苯甲·嘧菌酯悬浮剂的抑制作用最好,其EC50为0.28mg/L。     

催化动力学测定痕量锶

基于中性介质及加热条件下,Sr2+对依来铬红B(EB)-CO32-褪色反映产生强烈的抑制效应,从而提出了阻抑褪色动力学光度测定痕量锶的新方法。该方法的线性范围为0.02-0.14 mg/L,检测限为4.19×10-9g/mL。本方法操作简便、反应灵敏、重现性好,结果准确。用于不同水样中锶含量的测定,结果满意。     

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     

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     

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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