SMAI法制备的Ni—Ag／SiO2双金属催化剂的结构表征

应用溶剂化金属原子浸渍（ＳＭＡＩ）和普通浸渍（ＣＩ）法制备了三种不同摩尔比的ＳｉＯ２负载Ｎｉ－Ａｇ双金属催化剂，ＸＲＤ和磁测定结果表明ＳＭＡＩ催化剂中Ｎｉ和Ａｇ的粒度均小于金属含量相同的ＣＩ催化剂，ＳＭＡＩ催化剂中Ｎｉ和Ａｇ未形成合金，而ＣＩ催化剂中Ｎｉ和Ａｇ形成了合金，ＳＭＡＩ和ＣＩ催化剂都具有超顺磁性，ＸＰＳ测定结果提示，ＳＭＡＩ催化剂中零价，Ｎｉ和Ａｇ的含量高于ＣＩ催化剂，ＳＭＡＩ催化剂中Ｎ     

Pb—Ag—Ca新型阳有在MnSO4—H2SO4溶液中腐蚀速度的测定

分别测定了ＰＡＣ电极（Ｐｂ－Ａｇ－Ｃａ新型阳极的简称）在ＭｎＳＯ４－Ｈ２ＳＯ４溶液中的阴极极化曲线及阳极极 线，从图中求得：ｉｃｏｒ＝１５．８５μＡ／ｃｍ＾２，ψωｒ＝－０．０９５Ｖ，Ｖｃｏｒ＝２．９５Ｋｇ／ｍ＾２ａｎｎ．７．９０％（电极重量每年消耗的百分数）ｉ。（２）＝５４．７０μＡ／ｃｍ＾２及ｉ。（３）＝１．１０μＡ／ｃｍ＾２；讨论了ＰＡＣ阳极的腐蚀机理即反应（２）受反应（３）的动力学参数所     

含钨的多元复合析氢电极

用复合镀法制得Ｎｉ－Ｗ－ＷＣ－ＷＯ３复合电极，在０．５ｍｏｌ／ＬＨ２ＳＯ４中的氢超电势比软钢降低２８０ｍＶ，ｉ０提高三个数量级，电极表面粗糙度为Ｎｉ电极的三倍。在３００ｍＡ／ｃｍ＾２的大电流密度下，进行的长期恒电流电解试验表明电极性能稳定。ＸＰＳ分析证明电极表面主要成分为Ｎｉ，Ｗ，ＷＣ，ＷＯ３等。     

镍(Ⅱ)-1-苯基-3-甲基-4-苯甲酰基-吡唑啉酮-5络合物吸附波的研究及应用

在ｐＨ４．５的ＨＡｃ－ＮａＡｃ介质中,Ｎｉ（Ⅱ）与１－苯基－３－甲基－４－苯甲酰基－吡唑啉酮－５（ＰＭＢＰ）生成络合物,于－０．９５Ｖ（ｖｓ．ＳＣＥ,下同）出现一尖锐、灵敏的极谱波峰电流与Ｎｉ（Ⅱ）浓度在０．００５～１．２μｇ／ｍｌ范围内呈良好的线性关系．用多种电化学方法研究了极谱波的性质及电极反应机理,证明－０．９５Ｖ处的极谱波为络合物吸附波,峰电流由中心离子Ｎｉ（Ⅱ）还原产生,络合物组成为Ｎｉ（Ⅱ）：ＰＭＢＰ＝１：１试验了多种离子对峰电流的影响采用离子交换法分离干扰离子,用于钢样中镍的测定,得到满意结果。     

带HSV－tk基因的重组腺病毒杀伤离体肺癌细胞的研究

带有单纯疱疹病毒脱氧胸苷激酶基因（ＨＳＶ－ｔｋ）的腺病毒结合ｇａｎｃｉｃｌｏｖｉｒ（ＧＣＶ）对分裂细胞有很强的杀伤作用．在感染复数（Ｍ．Ｏ．Ｉ,ＭｕｌｔｉＰｌｉｃｉｔｙｏｆＩｎｆｅｃｔｉｏｎ）达到１０００时对人体肺腺癌细胞Ａ５４９的杀伤几乎达到１００％．四种人体肺癌细胞株（Ａ５４９,ＬＡＸ,ＳＰＣ,ＳＫＹ）对带ＨＳＶ－ｔｋ的腺病毒（ＡＤＶ／ＲＳＶ－ｔｋ）的杀伤作用表现出不同的敏感性．另Ａｃｙｃｌｏｖｉｒ（ＡＣＶ）和ＧＣＶ对感染了重组腺病毒ＡＤＶ／ＲＳＶ－ｔｋ的细胞都有一定杀伤作用,但杀伤效果有很大差别;就Ａ５４９而言,ＧＣＶ的杀伤作用比ＡＣＶ高７～８倍．此外ＡＤＶ／ＲＳＶ－ｔｋ结合ＧＣＶ杀伤肿瘤细胞时有“旁观者效应”,即感染了ＡＤＶ／ＲＳＶ－ｔｋ的细胞与未感染细胞混合后,后者也明显地遭到杀伤．     

乙酸镍在载体上的反应

该文主要以色谱技术研究了负载型Ｎｉ（Ａｃ）＿２的热分解性能。结果表明，Ｎｉ（Ａｃ）＿２的分解过程取决于载体的性质。强酸性载体ＨＺＳＭ－５分子筛起催化分解作用，导致Ｎｉ（Ａｃ）＿２分解时在低温区出现ＣＨ＿４和ＣＯ＿２峰；ＭｇＯ与Ｎｉ（Ａｃ）＿２的配位作用致使Ｎｉ（Ａｃ）＿２有两个最佳分解温度，ＣＯ＿２，ＣＯ和Ｈ＿２相应地都出现两个峰；与ＭｇＯ和ＨＺＳＭ－５相比，ＳｉＯ＿２和γ－Ａ１＿２Ｏ＿３对Ｎｉ（ＡＣ）＿２热分解的影响不很明显。但ＳＯ＿２，γ－Ａ１＿２Ｏ＿３和ＨＺＳＭ－５有较强的甲烷化效应。     

金属蒸气法制备Pd—Cu／C燃料电池电极

应用金属蒸气法制备了三种金属含量比不同的Ｐｄ－Ｃｕ／Ｃ燃料电池电极，ＸＲＤ和ＴＥＭ测定结果表明Ｐｄ和Ｃｕ已形成合金，合金的颗粒很小，平均直径小于５ｎｍ，ＸＰＳ和Ａｕｇｅｒ能谱说明Ｐｄ和Ｃｕ均以零价态存在，极化曲线实验结果看出，随着催化剂中Ｃｕ比例增加，电极的催化活性略有增加，ＫＯＨ溶液浓度（１－５摩尔／升）增大，电极活性随极化电流改变减小。     

镍钨合金电沉积及其析氢电催化性能的研究

本文研究以钛或铁为基体的Ｎｉ－Ｗ合金电镀，阴极极化曲线表明，以Ｔｉ为基体的Ｎｉ－Ｗ合金镀层为阴极，电解３００ｇ／ＬＮａＣｌ（２５℃），３．０Ａ／ｄｍ＾２能降低析氢过电势４２０ｍＶ，电解１ｍｏｌ／Ｌ ＭｎＳＯ４＋０．５ｍｏｌ／ＬＨ２ＳＯ４能降低８１０ｍＶ，说明Ｎｉ－Ｗ镀层是析氢的优良电催化阴极。     

Ag／ZSM—5催化乙醇为乙醛及其物性研究

利用空速、氧醇比、反应温度研究了Ａｇ／ＺＳＭ－５分子筛催化剂对催化乙醇制乙醛的反应活性的影响。结果表明，该催化剂在３４０℃就有相当高的催化活性，乙醛产率达９３．０％。ＸＲＤ和ＳＥＭ等研究表明，Ａｇ是以单质的形式负载在ＺＳＭ－５分子筛上。由此提出催化反应机理。     

DMF中Nd—Ni合金膜的制备

研究了室温下在含有少量水的ＮｄＣｌ３－ＮｉＣｌ２－ＤＭＦ溶液中电沉积制备Ｎｄ－Ｎｉ功能合金膜,选定一系列的阴极电位进行恒电位电解,制备出不同Ｎｄ含量的Ｎｄ－Ｎｉ合金膜．ＥＤＡＸ和ＸＲＤ分析表明：在０．１０ｍｏｌ／ｄｍ３ＮｄＣｌ３＋０．１０ｍｏｌ／ｄｍ３ＮｉＣｌ２的ＤＭＦ溶液中,控制电位为－１．７５Ｖ（对ＳＣＥ）进行恒电位电解,可得到有金属光泽、附着力强的银白色Ｎｄ－Ｎｉ合金膜     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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