新试剂5-(3-羧基苯偶氮)-8-氨基喹啉光度法测定铜的研究

合成了新试剂５－（３－羧基苯偶氮）－８－氨基喹啉（ｍ－ＣＰＡＱ）．Ｃｕ（Ⅱ）与ｍ－ＣＰＡＱ反应生成稳定的紫红色１∶３络合物．λｍａｘ为５４４ｎｍ，摩尔吸光系数ε为７．３×１０４Ｌ·ｍｏｌ－１·ｃｍ－１．铜量在０～１６μｇ／２５ｍｌ范围内符合比尔定律．方法有高的灵敏度和选择性，用于实际样品分析结果满意．     

葡萄糖和果糖的速差动力学光度法同时测定

利用葡萄糖和果糖与 ２,４二硝基酚在强碱性介质中反应生成红色化合物的反应速度差,建立了光度法同时测定葡萄糖和果糖的速差动力学法．当 Ｎａ Ｏ Ｈ 浓度为 １６×１０－ ３ ｍ ｏｌ／ Ｌ,２,４二硝基酚浓度为 １２×１０－ ３ ｍ ｏｌ／ Ｌ,分别在 ５０℃下反应 ８ｍ ｉｎ 和 ５５℃下反应 ６ ｍ ｉｎ 时,同时测定葡萄糖的线性范围为 ０～９６０×１０－ ３ ｍ ｏｌ／ Ｌ,果糖的线性范围为０～２００×１０－ ３ ｍ ｏｌ／ Ｌ．对葡萄糖与果糖浓度比为１５∶１～１∶１ 的混合液进行回收试验,回收率为９６３％ ～１０５３％ ．该方法已用于果葡糖浆的分析     

一类含多苯基芳基硅烷偶联剂的合成及应用

通过迪尔斯－阿尔德反应合成了四苯基苯三乙氧基硅烷，三苯基吡啶基苯基三乙氧基硅烷，四苯基苄基三乙氧基硅烷和三苯基吡啶基苄基三乙氧基硅烷等４种多苯基吡啶基类硅化合物，并用元素分析、ＩＲ和１Ｈ－ＮＭＲ作了表征．将它们用作ＲＴＶ硅橡胶的交联剂制得的胶片作了耐热性、抗辐射性试验，证明它们是ＲＴＶ硅橡胶耐热抗辐射的良好助剂．     

4,5-二溴邻硝基苯基荧光酮非离子表面活性剂分光光度法测定微量钼

研究了钼４，５二溴邻硝基荧光酮（ Ｂｒ Ｏ Ｎ Ｐ Ｅ）吐温４０ 显色体系的吸收光谱特性，在吐温４０ 存在下，钼（Ⅵ）与 Ｂｒ Ｏ Ｎ Ｐ Ｆ形成红色络合物．在 １．１～１．３ ｍ ｏｌ／ Ｌ 的盐酸介质中，络合物的吸收波长为 ５４０ ｍ ｍ ，摩尔吸光系数为 ９．５×１０４ Ｌ·ｍ ｏｌ·ｃｍ － １ ．钼（Ⅵ）的含量在 ０～１４ μｇ／２５ ｍ ｌ的范围内，符合比耳定律．多数常见阳离子不干扰显色反应．本法用于合金钢标样中的微量钼，获得了满意的结果．     

m-β-羟乙基砜硝基苯催化加氢制m-β-羟乙基砜苯胺

以Ｐｄ／Ｃ为催化剂,考察了温度、压力、溶剂、溶剂量、溶液ｐＨ值、搅拌速度及反应原料对ｍ－β－羟乙基砜硝基苯催化加氢制,ｍ－β－羟乙基苯胺的影响。表明以自制的ｗ＝０．０２Ｐｄ／Ｃ为经剂,经提纯的工厂中间体ｍ－β－羟乙基砜硝基苯为原料,在６５℃、３．５ＭＰａ、乙醇为溶剂、原料：乙醇：催化剂＝１：１：０．０５（ｍ／ｍ）、溶液ｐＨ值７～８、搅拌速度８００ｒ／ｍｉｈ的条件下反应２ｈ,反应得率可达９９．７％＾     

陕南水镁石纤维（FB）的物理性质研究

水镁石纤维是天然产出的、罕见的高镁实心纤维。其抗拉强度为９５×９．８１×１０￣６Ｐａ，弹性模量为１．５～２．０×９．８×１０￣９ｐａ，显微硬度为７０～２４０，密度为２．４４～２．４８ｇ／ｃｍ￣３。电阻率为３×１０￣５Ω．ｍ～６．１×１０￣７Ω．ｍ，介电常数为４．７～７．２，磁化系数为１１．５～１５．５ｃｍ￣３／ｇ。耐热区间为４５０～４８０℃，导热系数为０．１３１ｗ／ｍ·ｋ，热膨胀系数为５．７～８．８×１０￣（－７）ｍ／℃，热容为１．２６Ｉ／ｇ，热解焓为１９．６ＫＪ／ｍｏｌ。Ｎｅ＝１．５７５～１．５７７，Ｎｏ＝１．５５２～１．５５６，白度７３．５％。本文还讨论了上述物理性质的各种变化、影响因素及其应用。     

福建和溪亚热带雨林凋落物及残留物研究

探讨福建和溪亚热带雨林凋落物产量和地表残留物累积及其动态．结果表明；该雨林年凋落物量为７５５．４３ｇ／ｍ２（年变率为１．１７），其中叶为５１７，３５ｇ／ｍ２，枝为１９１．７５ｇ／ｍ２，花为２１．７６ｇ／ｍ２和果为２４．５７ｇ／ｍ２．影响凋落物月分布的主要因素是降雨及植物的物候期．月凋落物量（ｙ）与月降雨量（１）呈正相关（ｙ＝４６．２８９４＋０．１２０６ｙ，，ｒ＝０．５１０４，ｄｆ＝３４，ｐ＜０．０１）．林地残留物现存累积量随季节的不同而异，平均为４２６．２０ｇ／ｍ２（年分解常数Ｋ＝１．８７），其中叶３０７．６４ｇ／ｍ２，枝１０６．７７ｇ／ｍ２，花０．６０ｇ／ｍ２和果１１．１９ｇ／ｍ２．     

催化光度法测定痕量硫氰酸根

在磷酸介质中, 硫氰酸根对溴酸钾氧化茜素红的褪色反应具有较强的催化作用, 据此建立了催化光度法测定痕量硫氰酸根的新方法。在选定的条件下, 方法的检出限为１．１×１０－ ９ｇ／ ｍ Ｌ, 测定范围为０．０４５ ｍ ｇ／Ｌ～０．６４ ｍ ｇ／Ｌ, 用于直接测定唾液、湖水中的硫氰酸根, 结果满意。     

在表面活性剂存在下泰尔登的电分析化学特征研究

在ＰＨ７．００缓冲溶液中，当有０．００２０％ＯＰ在在时，泰尔登在－１．９５Ｖ产生一灵敏极谱波，利用此波可测定痕量泰尔登，检测下限为５．４×１０＾－９ｍｏｌ／Ｌ。用恒电位库仑法，计量库仑法和循环伏安法测得反应电子数为２，吸附量为１．１７×１０＾－１０ｍｏｌ／ｃｍ＾２，扩散系数为４．３×１０＾－５ｃｍ＾２／ｓ。     

胶束混配络合物的研究:铁(Ⅲ)-磺基水扬酸-间硝基苯基荧光酮-吐温-80体系的显色反应

研究了Ｆｅ（Ⅲ）－磺基水扬酸－间硝基苯基荧光酮－吐温－８０ 体系的显色反应条件,在ｐＨ８．８～１０．８ 的氨性介质中,络合物的λｍ ａｘ ＝ ６０５ ｎｍ ,ε＝ １．４０×１０５ Ｌ·ｍ ｏｌ－ １ ·ｃｍ － １ ,稳定时间为２ ｈ,络合比为Ｆｅ（Ⅲ）∶Ｓａｌ∶ｍ －ＮＰＦ＝ １∶１∶２,Ｆｅ（Ⅲ）在０～７．０ μｇ／２５ ｍ Ｌ范围内呈线性关系,检出限为０．０２×１０－ ６ ,方法简便,再现性好,灵敏度高,在掩蔽剂存在下可不经分离直接测定牛肝粉和大米标样中的微量铁     

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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