浓盐酸介质中F￣－浓度的测定

本文用离子选择电极法测定浓盐酸介质中的氟，探讨了各种条件的影响。回收率为９８％～１０４％，相对标准偏差为１．１％～１．４％。     

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％。     

用空气—乙炔火焰原子吸收光谱法测定润滑油中的钙和钡

为了提高空气－乙炔火焰的原子化效率．本法对选用的增感剂作了系统的研究，确定了用十二烷基磺酸钠和苄基三甲基氯化铵为混合增感剂，达到与联邦德国标准ＤＩＮ５１３９１Ｔ１和英国标准ＩＰ３０８的同等水平。而它们都以氧化亚氮－乙炔为原子化气 体． 本试验将两种火焰原子化作了对比。在氧化亚氮－乙炔火焰中，Ｂａ的变动系数为０．９％～１．９％；Ｃａ、为 １．１％～１．９％：在空气－乙炔火焰中，Ｂａ的变动系数为１．２％～２．５％，Ｃａ为１．１％～３．０％。通过系列的比较，本法的重复误差小于ＤＩＮ和ＩＰ３０８规定的误差。４８对样品的实测结果．６３％小于ＤＩＮ规定的重复性之半 （２．５％）．     

火焰原子吸收光谱法测定桑叶中Cu,Pb,Cd的含量

本文用火焰原子吸收光谱法测定了桑叶中Ｃｕ、Ｐｂ、ｃｄ的含量，并研究了样品的不同消化方法对其测定的影响，选择了ＨＮＯ＿３＋ＨＣｌＯ＿４＋ＨＦ消化苯系用于实际测定。方法的灵敏度依次为０．３１４μｇ／ｍｌ／１％，０．０３２μｇ／ｍｌ／１％，０．０５４μｇ／ｍｌ／１％。相对标准偏差依次为４．９％，３．４％，２．１％。加标回收率依次为９７－１０２％，９８－１０２％，９７－１０１％。     

硫脲介质火焰原子吸收光谱法测定铅精矿中的金

介绍了用硫酸钠消除铅的干扰，在王水－硫脲介质中用火焰原子吸收光测定铅精矿中金新方法，试验结果表明：线性范围为０－５．０μｇ／ｍＬ，方法回收率为９５．６％－１０２．１％，相对标准偏差小于２．１％。     

流动注射在线聚氨酯柱富集火焰原子吸收法测定矿样中的痕量金

本文用聚氨酯泡沫塑料作为柱材料，研究制定了在线预富集流动注射火焰原子吸收测定痕量金的新方法．实验溶液含金０．０２μｇ／ｍｌ，酸度为５％～１０％王水，以甲基异丁酮为洗脱液．当流速为１６ｍｌ／ｍｉｎ时，富集倍数为进样１ｍｉｎ富集５０倍．该方法选择性好，用于地质矿样中痕量金的测定，相对误差为１．１％．     

高效薄层扫描法测定乳粉中乳精和蔗糖的含量

用高效薄层扫描法，以正丙醇：浓氨水：术（１２：４：１）为展层剂，在λ＝３００ｎｍ处同时测定乳粉中乳糖、蔗糖，用该法测定乳糖与蔗糖回收率分别为１００．４％和１０４．５％，变异系数分别为３．２３％和１．５１％．     

火焰原子吸收法测定锡粉中Fe,Cu,Pb,Sb和Ca的含量

用ＨＣ１－ＨＮＯ３溶解试样，在相同量的试液中，分别加入浓度依次递增的５种元素的标准溶液，用空气－乙炔火焰原子吸收法测定Ｆｅ，Ｃｕ，Ｐｂ，Ｓｂ和Ｃａ的含量，建立了优化的测定条件，并对可能存在的元素进行了干扰实验，方法的回收率为９８．５％～１０２．０％，相对标准偏差为１．３％～２．８％。     

川黄柏果挥发油的化学成分研究

川黄柏果用水蒸汽蒸馏法提取挥发油，并以气相色谱—质谱联用技术测定其化学组成，共分离出４０多个组分，鉴定了１０个化合物，其含量占总离子流的９５％以上．主要成分为柠檬烯（８８．７８％）、顺—柠檬烯氧化物（１．３４％）、β—榄香烯（１．０７％）和（＋）—香芹酮（１．０５％）．     

野草净微乳剂中有效成分的离子抑制色谱测定法

用离子抑制技术在高效反相色谱中，同时测定了野草净中的有效成分１，２－二甲基－３，５－二苯基吡唑甲基硫酸盐和２，４－Ｄ酯。选择甲醇／乙腈／水为流动相，线性相关系数均为０．９９９７，回收率分别是９８．６±１．２６％和１０１．２±１．３４％。     

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     

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