甲烷氧化偶联Ba—ZrO2催化剂的研究

发现掺有碱土金属组份的ＺｒＯ２样品形成ＡＺｒＯ２，样品形成ＡＺｒＯ３相，其对甲烷氧化偶联反应显示出相当好的催化活性和选择性（其中Ａ＝Ｃａ，Ｓｒ，Ｂａ，尤以Ｂａ为佳）。大量ＢａＣＯ３相的存在有利于进一步提高催化剂的选择性；对于９０ｍｏｌ％Ｂａ－ＺｒＯ２，催化剂在７５０℃，６０００ｍｌ．ｇ＾－１．ｈ＾－１，ＣＨ４：Ｏ２：Ｎ２＝３．８：１．０：９．０（摩尔比）的条件下，Ｃ２烃选择性为５６．９％，ｃ2烃得     

甲烷氧化偶联Ba－ZrO_2催化剂的研究

发现掺有碱土金属组份的ＺｒＯ２样品形成ＡＺｒＯ３相，其对甲烷氧化偶联反应显示出相当好的催化活性和选择性（其中Ａ＝Ｃａ，Ｓｒ，Ｂａ，尤以Ｂａ为佳）．大量ＢａＣＯ３相的存在有利于进一步提高催化剂的选择性；对于９０ｍｏｌ％Ｂａ－ＺｒＯ２催化剂在７５０℃，６００００ｍｌ·ｇ－１·ｈ－１，ＣＨ４：Ｏ２：Ｎ２＝３．８：１．０：９．０（摩尔比）的条件下，Ｃ２烃选择性为５６．９％，Ｃ２烃得率达１７．２％．讨论了ＢａＣＯ３对几种催化剂的促进作用．     

棒曲霉UA—2木聚糖酶的蔗渣固态发酵

棒曲霉（Ａｓｐｅｒｇｉｌｕｓｃｌａｖａｔｕｓ）ＵＡ－２固态发酵蔗渣产木聚酶的培养基为每克蔗渣加营养液５ｍｌ，初始ｐＨ８．５．营养液的适宜组成为每升含：ＮＨ４ＮＯ３１０ｇ、Ｋ２ＨＰＯ４６ｇ、ＭｇＳＯ４·７Ｈ２Ｏ０．７５ｇ、ＣａＣｌ２０．７５ｇ、ＦｅＳＯ４·７Ｈ２Ｏ１１．２５ｍｇ、ＭｎＳＯ４·Ｈ２Ｏ３．７５ｍｇ、ＺｎＳＯ４３．０ｍｇ、ＣｏＣｌ２４．５ｍｇ．在上述培养基中接入其湿重１０％（Ｗ／Ｗ）的新鲜的ＵＡ－２种子曲，２８℃培养１０８ｈ，其木聚糖酶，滤纸降解酶和羧甲基纤维素酶的活力分别为２６９５．６、２８．５和４２．７ｕ／ｇ蔗渣．酶反应的最适ｐＨ５．０，最适温度５０℃；在ｐＨ４．０～１１．０内酶活性十分稳定．５０℃保温１ｈ，酶活剩余５５％，８℃下放置２３ｄ，活力几乎不变．磷酸盐，半胱氨酸对酶有激活作用，ＥＤＴＡ和对氯汞本甲酸对酶有抑制作用     

生物化学法制备负载型钯催化剂

菌株Ｒ０８（Ｂａｃｉｌｌｕｓ）具有强吸附还原Ｐｄ２＋ 的能力． 用Ｒ０８ 将Ｐｄ２＋ ／γ－ Ａｌ２Ｏ３ 表面的Ｐｄ２＋ 完全还原为Ｐｄ０,制成高分散度的Ｐｄ０／γ－ Ａｌ２Ｏ３ 催化剂． 该催化剂对ＣＯ催化转化为ＣＯ２ 表现出高的活性,在１５０ ℃,通ＣＯ（２％ ）空气混合气、ＧＨＳＶ ３０ ０００ ｍ Ｌ·ｇ－ １·ｈ－ １的条件下,ＣＯ转化率１００％ ;而且已测单程寿命为８０ ｈ．     

顺丁烯二酸二丁酯催化加氢制γ-丁内酯(Ⅰ)

顺丁烯二酸二丁酯（ＭＢ）催化加氢制γ－丁内酯（ＧＢＬ），是一个具有工业应用价值的反应．本文采用Ｃｕ／ＺｎＯ／Ａｌ２Ｏ３催化剂得到较高的收率和选择性．低压、低温有利于ＧＢＬ生成，Ｈ２／酯比对ＧＢＬ收率影响不大，助剂Ｂ使催化剂抗烧结能力提高．在０．５ＭＰａ反应压力下，经过１０００ｈ的寿命试验，结果表明，Ｃｕ／ＺｎＯ／Ａｌ２Ｏ３催化剂仍具有较高的活性，选择性及良好的寿命     

含苯并咪唑双钴配合物合成及表征

合成了四种新的含苯并咪唑双钴配合物：Ｃｏ２Ｃｌ４Ｌ，Ｃｏ２（ＳＣＮ）４Ｌ·３Ｈ２Ｏ，Ｃｏ２（ＯＨ）２（Ａｃ）２Ｌ，Ｃｏ２（ＮＯ３）４Ｌ·Ｃ２Ｈ５ＯＨ·２Ｈ２Ｏ，其中Ｌ＝Ｎ－羟乙基－Ｎ，Ｎ′，Ｎ′－三苯并咪唑甲基乙二胺。用ＩＲ，ＵＶＶｉｓ，ＴＧ，变温磁化率等对配合物进行了表征。结果表明双钴间存在弱的反铁磁相互作用。     

1－（ω－烷氧基烷基）己内酰胺的相转移合成法

己内酰胺与α，ω－二卤代烷在固－液相转移条件下（ＫＯＨ／Ｋ２ＣＯ３混合碱，ＴＢＡＢ为ＰＴＣ）反应得１－（ω－卤代烷基）己内酰胺１，研究了反应温度、时间、碱及催化剂用量对１，４－二溴了烷与己内酰胺进行单取代反应产率的影响．结果表明：当己内酰胺：１，４－二溴丁烷：氢氧化钾：碳酸钾：ＴＢＡＢ为１：３：１．５、３：０．０５（摩尔比）时，９０℃下反应，１３ｈ，产率可达７５．４％，并合成了其它３个１－（ω－卤代烷基）己内酰胺，在类似的固－液相转移条件下，１与醇反应得标题化合物．     

助剂及载体对MoO3.MxOy／SiO2催化剂性能及甲烷部？…

在常压下,以氧气为氧化剂,用两种不同制法的载体分别制备催化剂,用于甲烷部分氧化反应,对比结果表明用醇盐法所制ＳｉＯ２（ＺＳｉＯ２）做成的催化剂比用市售ＳｉＯ２（ＱＳｉＯ２）做成的催化剂反应活性和选择性好,助剂Ｖ２Ｏ５加入提高了ＣＨ４转化率和ＣＯ２,ＣＯ选择性,降低了ＨＣＨＯ产率和选择性,Ｂ２Ｏ３加入提高了ＣＨ４转化率,ＨＣＨＯ产率和其选择Ｖ２Ｏ５和Ｂ２Ｏ３的加入使ＭｏＯ３与ＺＳｉＯ３发生了不同的相     

对苯二甲酸根桥联的双钴（Ⅱ）配合物的合成及磁交换作用

合成和表征了３种新型的对苯二甲酸根桥联的双钴（Ⅱ）配合物：［Ｃｏ２（ＴＰＨＡ）（ＮＯ２－ｐｈｅｎ）４」（ＣＩＯ４）２·Ｈ２Ｏ（１），［Ｃｏ２（ＴＰＨＡ）（ｔｍｅｎ）４］（ＣＩＯ４）２（２）和［ＣＯ２（ＴＰＨＡ）（ｔｍｄ）４」（ＣＩＯ４）：（３）．经元素分析、红外光谱、电子光谱、电导和磁性测量等手段推定配合物具有对苯二甲酸根桥联结构，Ｃｏ（Ⅱ）离子处于畸变的八面体环境．测定了配合物（１）和（２）的变温（４～３００Ｋ）磁化率，其数值与自旋哈密顿算符ｈ＝－２ＪＳ１·Ｓ２导出的磁方程拟合，求得交换积分Ｊ分别为－２．９５ｃｍ－１（１）和－１．２４ｃｍ－１（２），表明双核配合物中金属离子间存在弱的反铁磁性超交换作用．     

催化氨氧化合成2,6-二氯苯甲腈

研究了以２,６－二氯甲苯为原料,催化氨氧化合成２,６－二氟苯甲腈,制备和筛选了性能优良的 Ｐ－Ｖ－Ｍｏ－Ｃｒ－Ｋ－Ｏ／γ－Ａｌ２Ｏ３氨氧化反应催化剂。经过 ２４０ ｈ催化剂寿命的初步实验,催化剂活性、选择性不降低。在 φ３２ ｍｍ×３ ｍｍ单管反应器中进行了氨氧化反应条件优化研究,反应温度 ３６０ Ｃ,接触时间 １０ Ｓ,氧气对 ２,６－二氯甲苯物质的量比为３时,２,６－二氯甲苯转化率９２．２％,２,６－二氯苯甲腈收率７７．６％,纯度为９８．７％。     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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