应用固体酸TiO2/SO2-4制备烷基糖苷

研究了用固体酸TiO2 /SO2 -4 合成烷基糖苷 ,并与以有机酸为催化剂合成的产品进行了性能比较。通过对产品的表面张力泡沫高度的测定 ,2种方法制得的产品性能相近。因此可得出结论 ,用固体酸TiO2 /SO2 -4 作催化剂合成烷基糖苷可望成为一种新的合成烷基糖苷的方法     

应用固体酸TiO2／SO4^2—制备烷基糖苷

研究了用固体酸TiO2/SO4^2-合成烷基糖苷，并与以有机酸为催化剂合成的产品进行了性能比较。通过对产品的表面张力泡沫高度的测定，2种方法制得的产品性能相近。因此可得出结论，用固体酸TiO2/SO4^2-作催化剂合成烷基糖苷可望成为一种新的合成烷基糖苷的方法。     

烷基取代苯磺酰氯的合成工艺研究

对以烷基取代苯和氯磺酸为起始原料,经磺化反应、酰氯化反应制备烷基取代苯磺酰氯的合成工艺进行了研究,探索了原料配比、反应温度、反应时间对产品收率的影响,优化了工艺条件,烷基取代苯磺酰氯收率达86%.     

磷酸酯两性表面活性剂的合成及性能

以乙二醇、环氧氯丙烷、烷基叔胺和五氧化二磷为原料,合成了一种磷酸酯两性表面活性剂。对合成工艺进行了研究,确定了最佳工艺条件,并对产品的两性特征、表面张力、临界胶束浓度等物化性能进行了测试。     

新型两性表面活性剂的合成与性能研究

以十二烷基二甲基叔胺、磷酸钠和环氧氯丙烷为原料,试验合成了一种新型含羟基磷酸酯两性表面活性剂。本文对其合成工艺进行了研究。确定了最佳工艺规范;并且对该产品的表面张力、泡沫力、电导率、临界胶束浓度、pH值和游离氯含量等物化性能进行了测试和研究。     

烷基多苷合成的研究

以转苷法合成了烷基多苷,并对其特性进行了测试,分析,结果表明,烷基多苷具有良好的表面活性,所合成的产品的质量达到了国外同类产品的水平。     

烷基糖苷的制备和表面性能

对烷基糖苷合成中的催化剂进行了优选，研究了反应物配比对产品泡沫性能的影响，测试了烷基糖苷的表面张力和泡沫性能，测试结果表明，烷基糖苷的表面张力代，泡沫丰富稳定，是一类新型的，性能优良的非离子表面活性剂。     

季铵盐表面活性剂微波合成放大工艺研究

文章在课题组对中长链溴代烷烃Cl-R_n(n=12,14,16,18)与MDEA合成多羟基季铵盐工艺路线的研究基础上,在小试阶段探究了微波合成十四烷基甲基二羟乙基溴化铵及十八烷基甲基二羟乙基溴化铵季铵盐表面活性剂的合成条件;通过设计对比实验,得出最佳的重结晶条件:每10 g产品用20 mL的无水乙醇溶解,V乙醇∶V乙酸乙酯=1∶4.在小试工艺成熟的基础上,对十八烷基甲基二羟乙基溴化铵进行微波中试放大,得到合成参数:温度T=130℃,功率P=6 kW,搅拌速度n=40 r·min~(-1);通过红外光谱仪、核磁共振仪和热重分析仪分别对小试产品和中试产品进行结构分析.     

内型异莰烷基一氯甲烷的合成

该文报道了从莰烯先经甲酰化制得8-甲酰基莰烯,再依次用Pd-C和Ni(R)催化氢化合成内型异莰烷基甲醇,使内型异莰烷基甲醇与亚硫酰氯反应合成内型异莰烷基一氯甲烷.产品进行了纯化和红外、核磁共振与质谱分析.为从莰烯合成新型的异莰烷类化合物开辟了一条新的途径.     

N、N’-亚甲基-双[N’-（3-羟甲基-2，5-二酮-4-咪唑烷基）]脲的合成与干燥工艺研究

本文以尿囊素、甲醛为原料,在酸性条件下合成了咪唑烷基脲并进行了中试.研究了通过减压浓缩、乙醇析晶和返混真空干燥三步处理使咪唑烷基脲的干燥温度从70℃降低到60℃,大大改善了产品的质量.同时也较大程度提高了产能,减小劳动强度和能耗,从而降低了生产成本.     

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

正~~