富马酸二甲酯与土豆淀粉接枝共聚反应规律研究

以硝酸铈铵为引发剂，研究了富马酸二甲酯与土豆淀粉接枝共聚反应的规律．实验结果表明，反应温度为５０℃，反应时间为２ｈ，单体浓度为０．５５ｍｏｌ／Ｌ，引发剂浓度为６．０ｍｍｏｌ／Ｌ时，接枝率较高．对富马酸二甲酯与土豆淀粉接枝共聚反应的机理进行了探讨．     

醋酸乙烯酯与马铃薯淀粉接枝共聚反应

本工作用硝酸铵作引发剂，对影响醋酸乙烯酯与马铃薯淀粉的接枝共聚反应的几个主要因素进行了较详细地考察。实验结果表明，乙酸乙烯浓度为１．３５ｍｏｌ／Ｌ，引发剂浓度为７．５０ｍｍｏｌ／Ｌ，反应温度为５０℃，反应时间在９０～１２０ｍｉｎ为最佳反应条件。     

三元共聚尼龙与丙烯酸乙酯的枝共聚反应研究

以高锰酸钾／硫酸为引发剂,对尼龙６、尼龙６１０、尼龙１０１０三元共聚物与丙烯酸乙酯进行接技共聚反应。研究了接技参数与时间、高到钾浓度、硫酸浓度及反应温度的关系。实验表明,当高锰酸钾浓度为０．０２５ｍｏｌ／Ｌ,Ｈ２ＳＯ４浓度为０．２４ｍｏｌ／Ｌ,反应温度６０℃,时间３ｈ时,接技率较高。Ｘ射线衍射检验表明,接技后产物的结晶度由原来的４７．８％下降到２１．４％。投料次序也直接影响接枝反应的进行。     

过硫酸铵引发衣康酸与苎麻纤维接枝共聚反应的研究

以过硫酸为引发剂,使衣康酸与苎麻纤维接枝共聚,对反应条件进行搪塞,并对接枝纤维对金属离子的吸附性能进行了初步研究,结果表明,在过硫酸铵浓度３×１０＾－２ｍｏｌ／Ｌ、衣康酸浓度１．８０ｍｏｌ／Ｌ、外加酸浓度１．０ｍｏｌ／Ｌ、５０℃下反应７２ｈ,接枝率较高,经衣康酸接枝的苎麻纤维具有一定的离子吸附能力。     

过硫酸钾引发丙烯酰胺与玉米淀粉接枝共聚反应规律的研究

以过硫酸钾为引发剂，研究了丙烯酰胺与玉米淀粉接枝共聚的反应规律，实验结果表明：当［Ｋ＿２Ｓ＿２Ｏ＿８］＝－１００ｍｍｏｌ／Ｌ、［ＡＭ］＝０．４２２ｍｍｏｌ／Ｌ，在６０℃反应３ｈ，接枝率、接枝效率、单体转化率及产率都很高。     

淀粉-甲基丙烯酸甲酯-醋酸乙烯酯接枝共聚反应研究

以玉米淀粉为接枝骨架,硝酸铈铵为引发剂甲基丙烯酸甲酯（ＭＭＡ）和醋酸乙酯（ＶＡＣ）为接枝单体,进行了接枝共聚,研究了单体用量,反应时间,引发剂秀量以及两单体配比对淀粉甲基丙烯酸甲酯－酯酸乙烯酯接枝共聚反应的影响,结果表明,当单体和淀粉用量比为２：１,引发剂浓度４．５×１０＾－３ｍｏｌ／Ｌ反应温度３０℃,反应时间２ｈ,ＭＭＡ和ＶＡＣ重量比为６：４时,可得到较高的接枝效率和接枝率,用核磁共振谱对接枝交     

高锰酸钾引发下淀粉／丙烯腈的接枝共聚反应

以高锰酸钾为引发剂,系统研究了在淀粉与丙烯腈接枝反应过程中各种反应对数如反应温度,单体浓度,引发剂浓度,催化剂浓度,淀粉的预处理温度对淀粉接枝反应及共聚物组成的影响,探讨了不同来源的淀粉和不同玉米变性淀粉接枝反应的能力,并分析了在反应过程中锰离子价态的变化,为进一步搞清锰离子引发淀粉接枝反历程提供了依据。     

铬酸引发丙烯酸酯与苎麻纤维的接枝共聚反应：Ⅰ.MMA …

以铬酸为引发剂,将甲基丙烯酸甲酯与苎麻纤维进行接枝共聚,探讨了接枝条件对接枝共聚的影响,结果表明,Ｃｒ＾６＋引发ＭＭＡ与苎麻接枝共聚的最佳条件为：「Ｃｒ＾６＋」＝０．００７ｍｏｌ．Ｌ＾－１,反应时间＝１２ｈ,反应温度为５０℃,「ＨＮＯ」＝１ｍｏｌ．Ｌ＾－１,「ＭＭＡ」＝０．７ｍｏｌ．Ｌ＾－１,纤维素用氢氧化钠溶液和乙二胺溶胀可提高接枝率。     

葡萄糖-BrO3--Mn2+-H2SO4-丙酮体系的振荡反应

以葡萄糖为有机底物，与－ＢｒＯ３－－Ｍｎ２＋－Ｈ２ＳＯ４－丙酮组成振荡反应体系，在恒温条件下进行振荡反应。结果表明：反应有诱导期，体系电导（Ｌ）不随时间（ｔ）变化；振荡周期，Ｌ随ｔ发生周期变化，溶液颜色在粉红色与无色之间交替变化，有典型的振荡波型。诱导期及振荡周期反应的表观活化能分别为８４．２７５ｋＪ／ｍｏｌ和９８．１５３ｋＪ／ｍｏｌ。体系振荡反应物浓度范围［葡萄糖］０．０１～０．０２ｍｏｌ／Ｌ，［ＢｒＯ３－］０．０３～０．０４５ｍｏｌ／Ｌ，［Ｍｎ２＋］０．０６～０．０８ｍｏｌ／Ｌ，［丙酮］０．２７～０．３０ｍｏｌ／Ｌ，［Ｈ２ＳＯ４］０．８～１．２ｍｏｌ／Ｌ。振荡反应有Ｂｒ２产生，Ｂｒ２准一级消耗速率常数ｋＢｒ２＝１．６×１０－５Ｓ－。对温度、反应物浓度、丙酮、Ｍｎ２＋、Ｃｌ－、底物对振荡反应的影响作了探讨。     

高锰酸钾引发的芋艿淀粉与丙烯酰胺接枝共聚物的合成及絮凝性能研究

利用高锰酸钾作引发剂，引发芋艿淀粉与丙烯酸胺接枝反应．探讨了反应时间．反应温度．引发剂用量，丙烯酰胺用量，硫酸浓度对接枝反应的影响．同时研究了接枝物的絮沉降性能．     

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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