葛根甙元的电化学行为及其应用研究

葛根甙元在０．１ｍｏｌ·Ｌ－１Ｈ２ＳＯ４底液中，出现一灵敏的示波极谱导数峰。峰电位为－１．１０Ｖ（ｖｓ．ＳＣＥ），峰电流与葛根甙元浓度在５．０×１０－７～６．０×１０－６ｍｏｌ·Ｌ－１范围内成线性关系，检出限为３．０×１０－７ｍｏｌ·Ｌ－１．用于片剂的测定，回收率９７．５％～１０５．０％，用吸附伏安法，当富集时间为６０ｓ时，峰电流与葛根甙元浓度在２０×１０－９～１．０×１０－８，１．０×１０－８～１．０×１０－７ｍｏｌ·Ｌ－１范围内呈线性关系，检出限可达５．０×１０－１０ｍｏｌ·Ｌ－１．用多种电化学手段研究体系的电化学行为，测得电极反应电子数ｎ＝１．电子转移因数α＝０．４５。体系具有吸附性，并符合Ｆｒｕｍｋｉｎ吸附等温式，吸附因数β＝１．３３×１０５，吸引因数α＝０．９５．实验表明，葛根甙元的还原为不可逆两步单电子电极反应过程。     

血清中微量镉的离心光度法测定研究

研究一种超高灵敏直接测定血清中微克级钢的新分析方法──离心光度法．在Ｃｄ－Ｂｒ－ＲＢ体系中缔合物表观摩尔吸光系数ε５６０＝５．０６×１０８Ｌ·ｍ－１·Ｃｍ－１，Ｃｄ２＋的浓度在１．０×１０－９～１０．０×１０－９ｍｏｌ·Ｌ－１范围服从Ｂｅｅｒ定律．本法用于分析测定人体血清样品中Ｃｄ２＋，得其含量为１．８７×１０－１１ｍｏｌ·Ｌ－１，变异系数为４．２％（ｎ＝５）．     

锗（Ⅳ）－槲皮素－溴酸盐体系极谱吸附催化波的研究

在醋酸盐缓冲底液中，锗（Ⅳ）能与槲皮素形成络合物，并吸附在汞电极上，在溴酸盐存在下，形成吸附催化波。使用单扫二阶导数极谱法时，锗浓度在６．０×１０￣（－８）～２．０×１０￣（－６）ｍｏｌ／Ｌ与峰高有线性关系，检出下限为２．０×１０￣（－８）ｍｏｌ／Ｌ．电活性络合物的组成为Ｇｅ（Ⅳ）：槲皮素＝１：３。平行催化反应的速率常数ｋ＝２．８ｘ１０￣６（ｍｏｌ／Ｌ）￣（－２）·ｓ￣（－１）。     

Pb（Ⅱ）、Zn（Ⅱ）与5－Br－PADAP络合平衡的研究

本文研究了Ｐｂ（Ⅱ）－５－Ｂｒ－ＰＡＤＡＰ及Ｚｎ（Ⅱ）－５－Ｂｒ－ＰＡＤＡＰ络合反应体系的吸收光谱，用基于Ｒｏｓｅｎｂｒｏｃｋ算法的最优化程序处理了光度测量数据，发现Ｐｂ（Ⅱ）与５－Ｂｒ－ＰＡＤＡＰ形成１：１络合物，稳定常数ｌｇβ＿１＝１１．２１，摩尔吸光系数ε＿１＝６．２×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）；Ｚｎ（Ⅱ）在ｃ＿Ｌ＞ｃ＿Ｍ的条件下主要形成１：２络合物，ｌｇβ＿２＝２２．３６，ε＿２＝１．２８×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。     

芦荟甙的伏安行为及其应用研究

芦荟甙在０．０５ｍｏｌ·Ｌ＾－１硫酸溶液中出现一灵敏的吸附伏安峰,峰电位为０．２３Ｖ（ｖｓ．Ａｇ／Ｃｌ）。峰电流与芦荟甙的浓度在２．０×１０＾－８～４．０×１０＾－７ｍｏｌ·Ｌ＾－１和４．０×１０＾－７～６．０×１０＾－６ｍｏｌ·Ｌ＾－１范围内成线性关系,检出限为５．０×１０＾－９ｍｏｌ·Ｌ＾－１（富集时间为１５０ｓ）。用线性扫描和循环估安法研究了体系的电化学行为,并应用于芦荟原胶中芦荟甙的的测定     

漆树漆酶催化氧化对苯二胺反应的微量热法研究

在厌氧条件下，０．１ｍｏｌ／Ｌ的磷酸盐缓冲溶液中，用微量热法测定了２９８．１５Ｋ的漆树漆酶与对苯二胺反应的摩尔反应焓ΔｒＨｍ＝－１６３．３６±０．３６ｋＪ／ｍｏｌ米氏常数Ｋｍ＝５．５８×１０＾－３ｍｏｌ／Ｌ和表现一级反应速率常数ｋ１＝８．６３×１０＾－３ｓ＾－１及此条件下用对苯二胺作底物时的漆酶活性值ＥＡ＝０．０４５ＩＵ。     

用间接方法研究胶束中化学反应的近似处理方法

用间接方法研究了胶束中化学反应的近似处理方法,推导出胶束溶液中反应的表现速率常数ｋ与胶束浓度「Ｍ」的关系式,并将其应用于ＳＯＤ模拟物的研究。在２５℃,０．８Ｅｃ（Ｃｃ为临界胶束浓度）ＣＴＡＢ体系中Ｃｕ（Ｔｈｒ）２催化Ｏ＾．－２歧化反应的表观速率常数为８．３７×１０＾８ｍｏｌ＾－１·Ｌ·ｓ＾－１,与脉冲辐解法所得结果９．２５×１０＾８ｍｏｌ＾－１·Ｌ·ｓ＾－１比较接近,说明这种近似处理方法是可行的。     

喹乙醇的电化学行为研究

研究了喹乙醇在醋酸盐和磷酸盐两种缓冲溶液中的电化学行为。在ｐＨ＝７．０的磷酸盐缓冲溶液中，使用单扫示波极谱获得了灵敏的吸附波。其导数波的波高ｈｐ２与ｃｏｌａ在４×１０－８～２×１０－５ｍｏｌ／Ｌ范围内成正比关系，检测下限为１×１０－８ｍｏｌ／Ｌ。在汞电极表面，喹乙醇的吸附遵从Ｆｒｕｍｋｉｎ吸附等温式。测定出吸附系数β＝９．１×１０４，吸引因素ν＝０．８。在ｐＨ＝４．５的醋酸盐缓冲溶液中，可以获得３个吸附波。分别测定出了３个波的表面电极反应速率常数ｋｓ１＝２．１ｓ－１，ｋｓ２＝２．２ｓ－１，ｋｓ３＝１．８×１０３ｓ－１。分别讨论了两种缓冲溶液中的电极反应机理。     

非离子型微乳液对铜─二甲酚橙分光光度分析的增敏作用

以含水量为９４．１％的非离子型乳化剂ＯＰ／ｎ－Ｃ５Ｈ１１ＯＨ／ｎ－Ｃ９Ｈ２０／Ｈ２Ｏ微乳液为介质，进行了Ｃｕ（１１）－二甲酚橙ＯＸ分光光度法研究（ε＝３．６×１０４Ｌ·ｍｏｌ－１·ｃｍ－１），与以水为介质（ε＝５．２×１０３Ｌ·ｍｏｌ－１·ｃｍ－１）及相同含水量的乳化剂ＯＰ胶束介质（ε＝１．１４×１０４Ｌ·ｍｏｌ－１·ｃｍ－１）相比较，测定灵敏度显著增加，样品分析结果令人满意。     

铜与丙酮醛双（N,N‘—二丁基）缩氨基硫脲显色反应的研究

在ｐＨ＝５－１２的乙醇水溶液中,Ｃｕ６２＋与丙酮醛双,Ｎ．Ｎ‘－缩氨基硫脲可形成１：１型络合物,其λｍａｘ＝４８８ｎｍ,ε４８８＝１．０９×１０＾４Ｌ．ｍｏｌ＾－１．Ｃｕ＾２＋浓度在０－５．０ｍｇ／Ｌ内服从比耳定律;若用氯仿萃取后测定,其ε４８８＝１．７７×１０＾５Ｌ．ｍｏｌ＾－１ｃｍ＾－２,Ｃｕ＾２＋浓度在０－０．５０ｍｇ／Ｌ内服从比耳定律。     

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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