糠醛硫代糠酰腙铜(Ⅱ)、镍(Ⅱ)络合物的合成及其抑菌作用

本文介绍糠醛硫代糠酰腙铜(Ⅱ)、镍(Ⅱ)络合物的合成.在元素含量分析、摩尔电导测定、红外和紫外光谱解析基础上确证了两种络合物的组成和配位情况,测定了配体和络合物对两种真菌和一种细菌的抑制活性.     

5-邻氯苯基糠醛的合成及其某些反应的研究

在水-丙酮混合溶剂体系使邻氯苯基重氮盐与糠醛反应制得5-邻氯苯基糠醛(Ⅰ)。研究了醛(Ⅰ)与羟胺、高锰酸钾及环已酮的反应。所得产物中5-邻氯苯基糠醛肟(Ⅱ)和2,6-双(5-邻氯苯基-2-呋喃亚甲基)环已酮(Ⅳ)为新化合物,后者在174-183℃范围内呈现液晶态;它的红外和电子光谱也予以报导。     

憎水性ZIFs对糠醛和5-羟甲基糠醛的吸附分离性能

糠醛(furfural)和5-羟甲基糠醛(HMF)是重要的生物质平台化合物。针对低浓度生物质平台化合物的吸附分离,研究了典型沸石咪唑酯骨架(ZIFs)材料结构与糠醛和5-羟甲基糠醛吸附分离性能的关系。选择两种孔径不同但孔容接近的憎水ZIFs材料(6元环ZIF-8和8元环MAF-6)用于吸附分离糠醛和5-羟甲基糠醛,分别研究了静态吸附、吸附动力学、竞争吸附、动态穿透性能。实验结果表明:对于糠醛吸附量,ZIF-8(0.48 g/g)和MAF-6(0.52 g/g)接近;对于5-羟甲基糠醛吸附量,ZIF-8(0.39 g/g)和MAF-6(0.40 g/g)接近。对于吸附动力学,MAF-6对糠醛和5-羟甲基糠醛吸附在20 min达到平衡,而ZIF-8在6 h以上才能达到平衡。进一步的动态穿透结果显示:与ZIF-8相比,MAF-6对糠醛的动态吸附快速达到平衡;MAF-6对5-羟甲基糠醛动态吸附容量远大于ZIF-8.最后研究了ZIF-8和MAF-6对双组分糠醛/5-羟甲基糠醛的吸附分离性能,结果显示,ZIF-8分离糠醛/5-羟甲基糠醛受动力学控制;而MAF-6分离糖醛/5-羟甲基糖醛是由热力学控制。     

5—芳基糠醛及其衍生物的合成

本文用芳基重氮盐与糠醛反应,合成了5—(对乙酰基苯基)糠醛(Ⅰ)和5—(邻羧基苯基)糠醛(Ⅹ)以及它们的衍生物,并研究了(Ⅰ)和(Ⅹ)的氧化反应。将(Ⅰ)和(Ⅹ)用H_2O_2、溴水、高锰酸钾碱性液氧化,分别得到(Ⅶ)、(Ⅷ)、(Ⅸ)和(ⅩⅥ)、(ⅩⅦ)、(ⅩⅧ)。     

利用SERS技术和DFT计算方法对糠醛分子的振动光谱研究

从实验上测量了糠醛分子(Fu)的正常拉曼谱(NRS),同时又运用了密度泛函理论(DFT)计算了糠醛分子的振动光谱,计算时采用了B3LYP混合泛函和6-31G基函数组,理论计算结果很好地符合了实验测量结果。还报告了糠醛分子在固态银纳米颗粒表面的表面增强拉曼散射(SERS)光谱,最后对糠醛分子在银纳米粒子表面上的可能吸附状态进行了讨论。     

糠醛初馏塔的研究

糠醛是利用农林产品的废料生产的一种有机化工原料。目前我国生产糠醛的主要原料是玉米芯,其次是棉籽壳、油茶壳和甘蔗渣。原料经过水解反应后,其反应产物(通称醛气)再经中和、冷凝,得水解液。它的主要成份是水与糠醛,其中水的含量达92％(重)以上。此外,水解液中还含有多种杂质,有以甲醇为代表的轻组份和以甲基糠醛为代表的重组份,但含量极少。以玉米芯做原料为例,轻组份的含量仅0.3～0.4％(重)左右。由于水     

固体酸催化剂SO42-/TiO2催化木糖脱水制备糠醛的新方法

探索了以固体超强酸SO42 -/TiO2为催化剂,催化木糖脱水环化制备糠醛的新方法.以TiCl4乙醇溶液(体积比1∶1)作为钛源、以浓氨水作为沉淀剂制备二氧化钛,硫酸溶液作为浸渍液,制备了SO42 -/TiO2固体超强酸.采用二溴化法(溴酸钠-溴化钠)对糠醛产量进行分析,研究了反应条件和催化剂制备过程中硫酸浸渍液浓度、焙烧温度等对糠醛产率的影响.结果表明,使用固体超强酸作催化剂,在最佳条件下,糠醛产率达到42.6％,而同样条件下用硫酸作催化剂糖醛产率只有15.6％.     

糠醛加氢制糠醇催化反应的研究

本文研究了常压下糠醛在催化剂(Cu-Si)存在下转化为糠醇的催化加氢作用,确定了催化剂适宜配料比和高活性催化剂的制备方法。最佳催化剂糠醛处理量为300g/g(催),接近英国和法国同类催化剂,其糠醛处理量分别为310kg/kg(催)和340kg/kg(催)。同时考察了该催化加氢反应条件,确定了最佳工艺条件,并对这类催化体系的作用机理进行了初步探讨。     

分析矛盾 解决矛盾——常压连续化糠醛生产新工艺试验成功

糠醛生产是综合利用农林植物废料的重要途径之一。全省有数十家工厂(车间)利用棉籽壳、油茶壳、栲胶渣、甘蔗渣、玉米芯、谷壳等植物废料来生产糠醛,生产规模相当可观,并以糠醛为原料合成了农药、合成橡胶、合成树脂、合成纤维、合成药物、工程塑料、     

不同添加剂预处理核桃壳真空热裂解

采用自制热解反应器对不同添加剂预处理过的核桃壳进行真空热裂解研究,并利用气相色谱-质谱联用仪(GC-MS)对各热解油的组成进行分析表征.研究结果表明:不同添加剂预处理对热解各产物产率有较大影响,各种条件下的热解油都主要由苯酚、愈创木酚、紫丁香酚及其衍生物等酚类物质,1-羟基-2-丁酮、2(5H)-呋喃酮、3-甲基-1,2-环戊二酮等酮类物质,糠醛、5-甲基糠醛等呋喃类物质以及左旋葡萄糖、1,4∶3,6-二酐-α-d-吡喃葡萄糖等糖类物质组成;酸性条件(HCl,HNO3,H2SO4和ZnCl2)下预处理有利于糖类物质和糠醛的形成,而碱性条件(NaOH,Ca(OH)2和Na2CO3)则有利于酚类物质和酮类物质的形成.     

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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