阻抑动力学分光光度法测定痕量碘

研究了在稀硫酸介质中,痕量碘离子对亚硝酸根催化溴酸钾氧化百里香酚蓝的阻抑作用,建立了测定痕量碘离子的阻抑动力学光度分析的新方法.测定碘离子的线性范围为:0～0.32μg/mL,检出限为8.96×10-8g/mL.用于药品中的微量碘的测定,结果满意.     

分光光度法测定矿石中痕量铅

用双硫腙显色分光光度法测定铁矿石中痕量铅,该方法具有简单、快速、灵敏等特点,用以测定铁矿石中的痕量铅,获得了满意的结果.检出限为0.06μg/mL,线性范围为0.00μg/mL～1.0μg/mL Pb2+,相关系数为0.9996,回收率89%～99%.     

痕量铜的阻抑动力学光度法测定

在酸性条件下,铜(Ⅱ)可催化空气氧化碘化钾生成碘,但当铜(Ⅱ)的质量浓度小于0.5μg/25 mL时有阻抑作用.利用铜(Ⅱ)对反应的阻抑作用建立测定痕量铜的动力学光度法,该方法的检出限量为0.005 3μg/L,线性范围为0~2.0μg/L.用于测定人发中的痕量铜(Ⅱ),结果满意.     

催化邻苯二酚紫褪色动力学光度法测定痕量钌

研究了HAc-NaAc缓冲介质中痕量钌（Ⅲ）催化高碘酸钾氧化邻苯二酚紫的褪色反应问题,确定了最佳反应条件,给出了动力学光度法测定痕量钌的新方法。方法的线性范围为0.05～0.625μg/25mL,检出限为7.8×10^-10g/mL。八次平行测定0.500μg/25mL钌（Ⅲ）的相对标准偏差为2.6%。试验了共存离子对催化反应的影响,发现常见的离子均不干扰测定。方法可用于矿区废水痕量钌（Ⅲ）的测定。     

分光光度法测定矿石中痕量铅

用双硫腙显色分光光度法测定铁矿石中痕量铅，该方法具有简单、快速、灵敏等特点，用以测定铁矿石中的痕量铅，获得了满意的结果．检出限为0．06μg／mL，线陛范围为0．01μg／mL～1．0μg／mLPb^2＋，相关系数为0．9996，回收率89％～99％．     

催化褪色光度法测定农产品中的痕量铜

研究了在硫酸介质中痕量铜(Ⅱ)催化过氧化氢氧化乙基紫褪色反应的最佳条件,建立了高灵敏度测定痕量铜的新方法.检出限为6.0×10-10g/mL,线性范围为0.05~3.0μg/(25 mL).使用的仪器设备简单,检测简便、快速.应用于农产品中痕量铜的测定,结果令人满意.     

催化动力学分光光度法测定痕量对苯二胺

在硫酸介质中,基于痕量对苯二胺对类Fenton试剂氧化罗丹明B褪色反应有强烈的催化作用,据此建立了一种动力学光度法测定痕量对苯二胺新方法。考察了各种因素对测定方法灵敏度的影响。在最佳实验条件下,方法的线性范围为0.16～0.56μg/mL,检出限为0.03μg/mL。该方法用于环境水样中对苯二胺的测定,结果满意。     

过氧化氢-橙黄催化动力学光度法测定痕量钴的研究

在pH=9.53的NH3-NH4Cl缓冲溶液介质中,痕量Co2+对H2O2氧化橙黄G(OG)的褪色反应具有显著的催化作用,据此建立了催化动力学光度法测定痕量Co2+的新方法,该方法的线性范围为0.006～2.000μg/25 mL,检出限为3.41×10-3μg/25 mL,可直接用于维生素B12针剂中痕量Co2+的测定,结果满意.     

催化褪色光度法测定食盐中微量碘

在NaH2PO4～Na2HPO4介质中,微量碘对高碘酸钾氧化孔雀绿褪色有显著的催化作用,因此可用动力学分析法测定微量碘,该方法检出限为6.1×10-8g/mL,线性范围为0.21～1.50μg/mL.用于食盐中微量碘的测定结果令人满意.     

催化动力学法测定痕量钛的研究──溴酸钾-钛（IV）-藏红T体系

在稀硫酸介质中,基于痕量钛（IV）对溴酸钾氧化藏红T褪色反应的催化作用,建立了一个测定痕量钛（IV）的新催化动力学光度法。方法的检出限为3.3×10-10g/mL,线性范围为1.0～8.0μg/L,用于测定食品中的痕量钛,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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