金属离子与伴刀豆球蛋白A刺激细胞作用的关系研究

采用＾３Ｈ－ＴＤＲ掺入法，研究了过渡金属离子Ｃｄ＾２＋、Ｎｉ＾２＋、Ｃｕ＾２＋和Ｚｎ＾２＋取代Ｃｏｎ－Ａ中Ｍｎ＾２＋之后，对人淋巴细胞刺激分裂作用影响。研究结果表明，不同的金属离子取代后的Ｃｏｎ－Ａ刺激活性都明显提高。     

腺苷三磷酸与金属离子配合物性顺序的研究

本文用ｐＨ电位滴定法研究了腺苷三磷酸ＡＴＰ与８种稀土金属离子Ｌａ＾３＋、Ｐｒ＾３＋、Ｓｍ＾３＋、Ｎｄ＾３＋、Ｇｄ＾３＋、Ｈｏ＾３＋、Ｅｒ＾３＋、Ｙｂ＾３＋和５５种过渡金属离子Ｍｎ＾２＋、Ｃｏ＾２＋、Ｎｉ＾２＋、Ｚｎ＾２＋、Ｃｕ＾２＋形成的配合物的稳定性顺序。     

两种金属离子[Ca^2＋,Mg^2＋]——螯合剂缓冲体系 …

在一种金属离子「Ｃａ＾２＋」及两种金属离子「Ｃａ＾２＋,Ｍｇ＾２＋」螯合剂缓冲体系中总「Ｃａ＾２＋」的计算工作基础上,进行了含有两种金属离子「Ｃａ＾２＋,Ｍｇ＾２＋」－－螯合剂缓冲体系中自由钙「Ｃａ＾２＋」的计算研究,特别是利用微机给出了简单计算公式,编制了计算程序,并给出部分常用数据,只要在所需ＰＨ值、温度、「ＥＤＴＡ」或「ＥＧＴＡ」浓度条件下,根据实验要求,由「Ｃａ＾２＋」和「Ｍｇ＾２＋」就可     

金属离子和脲对背角无齿蚌碱性磷酸酶的影响

研究了多种金属离子对背角无齿蚌碱性磷酸酶（ＡＫＰ）活性的影响，结果表明：Ｎａ＾＋，Ｋ＾＋和Ｌｉ＾＋等一价金属离子没有影响：Ｍｇ＾２＋，Ｃａ＾２＋，Ｂａ＾２＋，Ｎｉ＾２＋，Ｍｎ＾２＋和Ｃｏ＾２＋有激活作用；而Ｃｕ＾２＋，Ｚｎ＾２＋，Ｈｇ＾２＋，Ｃｄ＾２＋及Ａｇ＾＋有抑制作用，脲对ＡＫＰ的变性失活作用，按脲浓度可为低于２ｍｏｌ／Ｌ和高于２ｍｏｌ／Ｌ两种类型，低浓度脲对背角无齿蚌ＡＫＰ活性抑制的动力学表     

混合金属离子溶液中形成复合氢氧化物的研究

采用电位滴定法对Ⅲ－Ⅱ价混合金属离子（Ａｌ＾３＋、Ｆｅ＾３＋、Ｎｉ＾２＋、Ｚｎ＾２＋、Ｃｕ＾３＋）水溶液加碱形成复合氢氧化物进行了研究,结果发现,所的Ｍ＾３＋￣Ｍ＾２＋混合体系均能形成复合氢氧化物,并且复合氢氧化物沉淀时的ＰＨ值低于单一金属离子析出Ｍ（ＯＨ）２深沉时的ＰＨ值,这种ＰＨ值差别越大,越易形成复合氢氧化物,即形成复合的顺序是：Ｎｉ＾２〉Ｚｎ＾２＋〉Ｃｕ＾２＋值,这种ＰＨ值差别越大,越易形     

乳酸克鲁维酵母（Kluveromces lactis）β—半乳糖苷酶的稳定性 …

探讨了乳酸克鲁维酵母（Ｋ．Ｌａｃｔｉｃ）β－半乳糖苷酶金属离子稳定性和热稳定性。证明某些金属离子对β－半乳糖苷酶具激活作用,另一些金属离子对β－半乳糖苷酶活性影响不大,但是在高浓度的条件下均地酶活性不同程度的抑制作用。Ｃａ＾２＋对酶的抑制到盐,脱脂乳以及Ｍｇ＾２＋,Ｍｎ＾２＋所恢复。     

两种不同来源的FA与金属离子张中合能力的初步研究

采用ＰＨ滴 定法研究风化某ＦＡ和发酵法ＦＡ与金属离子的络合能力，给出相的ＰＨ滴定曲线，获得了７种金属离子与两种不同来源ＦＡ络合倾向的大小顺序，即：Ｍｇ＾２＋〈Ｃｏ＾２＋〈Ｎｉ＾２＋〈Ｚｎ＾２＋〈Ｃｕ＾２＋〈Ａｌ＾３＋〈Ｆｅ＾３＋。     

光度法测定N,N‘—双（8—喹啉基）丙二酰胺过渡金属配合…

报导用连续变化度法在非水溶剂ＤＭＦ溶液中测定一种瓣合成的配体，Ｎ，Ｎ’－ｂｉｓ（８－ｑｕｉｎｏｌｙｌ）ｍａｌｏｎａｍｉｄｅ和４种过渡金属离子Ｃｕ＾２＋、Ｚｎ＾２＋、Ｃｏ＾２＋、Ｃｉ＾２＋所形成配合物的稳定常数，按共对数值的大小排列有如下顺序：Ｃｕ＾２＋（５．６２）〉Ｚｎ＾２＋（４．０３）〉Ｎｉ＾２＋（３．８２）〉Ｃｏ＾２＋（３．７９），配合物的配位比为１：１。实验表明，它们的稳定性较之在水体系中，     

自由基与纸浆漂白（Ⅱ）—自由基的控制和碳水化合物的保护

介绍预处理降低未漂浆中的过渡金属离子含量和在漂白过程中添加助剂控制自由基、保护碳水化合物的途径,以便达到提高漂白选择性,改善漂白效果,降低漂白废水污染等目的。     

蛇莓果天然色素的稳定性分析

研究了常用食品添加剂维生素Ｃ，有机酸，糖类和常见和几种金属离子Ｎａ＾＋，Ｋ＾＋，Ｃａ＾２＋，Ｍｇ＾２＋，Ｆｅ＾２＋，Ｚｎ＾２＋，Ａｌ＾３＋对蛇莓果中天然红色素稳定性的影响。并对色素的耐酸碱性，耐氧化性，耐还原性以及耐热性进行了探讨。     

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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