非有机溶剂萃取光度法测定铀的研究—PEG—Arsenazo Ⅱ—（NH_4）_2SO_4体系

本文研究了偶氮胂（Ⅲ）作萃取剂和显色剂，在ＰＥＧ－（ＮＨ４）２ＳＯ４－Ａｒｓｅｎａｚｏ（Ⅲ）体系中的非有机溶剂萃取光度法测定铀．将配合物从ｐＨ２．０（ＨＣｌ）溶液或ＨＣｌ—ＮａＡｃ缓冲溶液）水溶液中萃取至ＰＥＧ相，其最大吸收波长位于６５５ｎｍ，摩吸光系数为３．０×１０４Ｌ．ｍｏｌ－１．ｃｍ－１，Ｕ（ＶＩ）的线性范围为０－４．５μ／ｍｌ，轴与ＡｒｓｅｎａｚｏＣ（Ⅲ）的配位组成为１：１．将方法用于煤渣中铀的测定，获得了满意结果．     

溶剂萃取热力学的研究──TBP-nC_7H_(16)-HNO_3体系热力学平衡常数的测定

本文研究了ＴＢＰ－ｎＣ７Ｈ１６－ＨＮＯ３ 萃取体系在２５℃和１大气压下的分配平衡。萃取剂 ＴＢＰ的浓度变化范围为 ５％－１００％（Ｖ／Ｖ）。用 Ｐｉｔｚｅｒ公式计算了水相硝酸的活度系数，应用诸热力学关系特别是 Ｇｉｂｂｓ－Ｄｕｈｅｍ关系由实验结果导出了有机相中四个组分（溶解水、正庚烷、萃取剂和萃合物）的活度系数，从而求出了萃取反应的热力学平衡常数Ｋａｏ六个萃取剂浓度下独立求得的平衡常数值很接近，可以写作Ｋａ＝０．２６±０．０３。     

对－亚硝基二甲苯胺萃取光度法测钯

提出了用对－亚硝基二甲苯胺作萃取剂和显色剂，三氯甲烷作溶剂，直接萃取分光光度法测定钯．研究了测定的最佳条件．摩尔吸光系数为８．１×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，５倍重量的铂不干扰．本方法操作简便，应用于催化剂中钯的测定，效果满意     

冕宁稀土矿浸出液萃取转型工艺研究

对四川冕宁稀土矿硫酸焙烧后的浸出液萃取转型工艺进行了研究，确定了萃取转型有机相为ＨＡＣ－煤油体系，转型条件为：水相酸度为ｐＨ＝４．０；稀土离子水相初始浓度为０．１Ｍ；萃取时间大于５ｍｉｎ，用３ＭＨＣｌ溶液作反萃液，制得了稀土氯化物和氧化物产品。     

对—亚硝基二甲苯胺萃取光度法测钯

提出了用对－亚硝基二甲苯胺作萃取剂和显色剂，三氯甲烷作溶剂，直接萃取分光光度法测定钯，研究了测定的最佳条件，摩尔吸光系数为８．１×１０＾４Ｌ．ｍｏｌ＾－１，ｃｍ＾－１，５倍重量的铂不干扰。本方法操作简便，应用于催化剂中钯的测定，效果满意。     

硝酸反萃取火焰原子吸收光谱测定腺苷钴铵片中微量钴

研究了以１ｍｏｌ．Ｌ＾－１ＮＨ４ＳＣＮ为介质,甲基异丁基甲酮萃取,４ｍｏｌ．Ｏ＾－１硝酸反萃取火焰原子吸收光谱水相测定微量钴的方法,钴量在０－５ｍｇ．Ｌ＾－１范围内呈良好的线性关系,检出限为０．０７０ｍｇ．Ｌ＾－１,相对标准偏差为１．１７％,该方法适用于腺苷钴胺片中微量钴的测定。     

萃取色谱法分离─火焰原子吸收法测定岩矿中的微量银

本文提出了以甲基磷酸二甲庚脂（Ｐ３５０）为固定相，硅烷化硅胶为载体，０．５ｍｏｌ／Ｌ．ＨＣＩ—０．１ｍｏｌ／ＬＮａＳＣＮ溶液为流动相，采用０．１ｍｏｌ／ＬＨＣＩ—０．６ｍｏｌ／ＬＮａＳＣＮ作洗脱液的萃取色谱法分离微量银的方法。研究了分离测试条件和干扰等。并对岩石矿物中的微量银进行了分离测定，获得良好结果。回收率达（９７—１０５）％。     

用MIBK萃取铂族金属离子的硫氰酸配合物研究Ⅰ．钯（Ⅱ）的萃取

研究了有硫氰酸盐存在下用ＭＩＢＫ（甲基异丁基酮）萃取Ｐｄ（Ⅱ）；在０．５～４．０ｍｏｌ／ＬＨＣｌ介质中，有１０００倍ＳＣＮ￣－存在下，Ｐｄ（Ⅱ）被定量萃取，有机相：水相可达１：５．萃取容量达１．２ｇ／Ｌ，通过对各级配合物分布的计算，表明此时Ｐｄ（Ⅱ）以Ｐｄ（ＳＣＮ）＿４形式存在，初步认为是Ｐｄ（ｓｃＮ）＿４与质子化的Ｍ１８Ｋ形成盐而被萃取。     

正交法研究烷基叔胺对盐酸、硫酸的萃取

用正交实验法研究了叔胺体系萃取剂萃取盐酸过程中不同因素的影响，通过方差分析和显著性检验，证实了萃取剂的萃取机理，确定了过程在所选定因素的水平范围内的最优条件：１．５４ｍｏｌ／Ｌ盐酸，５０％体积浓度的叔胺，１０％体积浓度的异戊醇．同时进一步考察了萃取剂萃取分离盐酸和硫酸过程中因素对其萃取分离效果的影响，通过极差分析法确定主次因素并选择最优工艺条件：１．４４ｍｏｌ／Ｌ盐酸，１０％体积浓度的叔胺，１０％体积浓度的异戊醇，０．７８ｍｏｌ／Ｌ硫酸．对研究溶剂萃取法从氯化钾制硫酸钾的工艺优化有指导意义．     

水－醋酸体系中HCl的活度系数与Pitzer参数

运用氢玻璃电极与氯离子膜电极，测定了２９８．２Ｋ下电池（Ｈ＋）玻璃电极｜ＨＣｌ（ｍ），ＮＡｃ（Ｗ）＋Ｈ２Ｏ（１－Ｗ）｜（Ｃｌ－）膜电极的电动势，并求得了ＨＣｌ浓度分别为ｍ＝０．０１０，０．０２０，０．０４０，０．０６０，０．０８０，０．１００，０．１２０时在不同组成（１０％～９０％）的水－醋酸混合溶剂中的平均活度系数，进而通过多元线性拟合，求得了ＨＣｌ在不同组成溶剂中的Ｐｉｔｚｅｒ参数β０、β１、Ｃφ。最后对数据处理方法及结果进行了讨论。     

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.     

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.     

Editorial note for the special topic on ＂Nanopore Analysis＂

The concept of nanopore analysis, using the pore-forming protein a-hemolysin to detect individual nucleic acids at a single-molecule level, was first proposed in 1996. Over the past two decades, tremendous progress has been made in the nanopore field, and nanopore analysis has become a label-free and high-throughput method for probing bio- molecules and other analytes with single-molecule sensi- tivity, especially holds the promising for ＂third generation＂ DNA sequencing. However, challenges still remain in the experimental strategies and the design of whole nanopore-based instruments. Here, we proudly present a special topic dedicated to the topic of ＂Nanopore Analysis＂, with 8 reviews/articles providing up to date coverage of the experimental strategies, theoretical calcu- lations and simulations, and instrument design. Reviews and articles on the experimental strategies cover control of DNA partitioning into a nanopore, detection of target DNA, and the advantages of nanopore-based DNA sequencing. The theoretical calculations and simulations discuss the translocation behavior of DNA, and an inte- grated measurement system and data analysis software are presented for instrument design.     

Effects of climate change on biodiversity

1 Rise of studies on climate change＇s effects on biodiversity
Until the 1980s, climate change and biodiversity were studied as two independent disciplines for more than a century. In 1992, the Ecological Society of America＇s annual report named climate change, biodiversity, and the sustainable ecological system as the three major global environmental issues of the twenty-first century [1].     

Discussing the Expansive Learning in Modern Organizations

<正>1 Introduction Endeavours on learning methods have long occupied the mind spaces of scholars and there have been theories abound on how people learn and in what way organisations can use some of the knowledge gained in the art of learning to maximise human productivity.While the theories by themselves are not solutions to problems,they are steps of inquiry that provide us with interesting perspectives that we can use to extend our knowledge of the dimensions of learning.This paper is an exploratory work on the theories postulated by three notable scholars including Zimmerman     

Progress in Linear Scaling Non-Orthogonal Localized Molecular Orbitals Method

The non-orthogonal localized molecular orbital(NOLMO)is the most localized representation of electronic degrees of freedom.As such,NOLMOs are thus potentially the most efficient for linear scaling calculations of electronic structures for large systems.However,direct ab initio calculations with NOLMO have not been fully implemented and widely used,partly because of the slow convergence issue in the optimization of NOLMO.We devel-     

An Accurate and Universal HEOM Approach to Strongly Correlated Quantum Impurity Systems

A hierarchical equations of motion(HEOM)approach is developed for general open quantum systems coupled to fermionic environment.The HEOM method is in principle formally exact,as it resolves nonperturbatively the combined effects of many-body interaction,system-bath dissipation,and non-Markovian memory.In practice,the HEOM approach is highly accurate and efficient for the characterization of strongly correlated quantum impurity sys-     

关于有理混合吸引子的Ciric型非唯一不动点定理

本文我们应用有理混合吸引子条件去证明具非唯一不动点的映射Ciric型的若干不动点定理.结果推广并改进已知的一些结果.     

次线性算子交换子在变指数Herz-Morrey空间上的有界性

本文主要利用给出的次线性算子分别与BMO函数及Lipschitz函数生成的交换子在变指数L~(p(·))(R~n)空间上的有界性,证明了其在变指数Herz-Morrey空间MK_(q,p(·))~α~((·)),λ(R~n)上的有界性.     

利用GPS双频观测值实现PPP电离层延迟高阶项改正

给出了利用双频观测值计算L3组合电离层延迟高阶项改正的方法,并与全球电离层延迟文件的改正效果进行对比.利用赤道附近的15个国际全球卫星导航定位系统服务组织(IGS)站的数据进行比较,结果表明:2种方法计算的电离层二阶项延迟互差最大不超过1 cm,三阶项延迟互差最大不超过5 mm;电离层高阶项改正后的观测值精密单点定位(PPP)解算结果N、E、U方向互差平均值分别为0.4、0.5、1.0mm,因此2种改正方法效果在同一水平.