异戊二烯催化脱氢环氧化的研究

 合成了钼－乙酰丙酮配合物，并进行了表征，确定了其组成为M\r\noO2（acac）2．以MoO2（acac）2为催化剂，以过氧化氢为氧化剂，对\r\n异戊二烯一步脱氢环氧化制3－甲基呋喃反应进行了研究．考察了反应\r\n条件（催化剂用量、反应底物之比、温度、时间、溶剂和助剂等）对该\r\n反应的影响．结果表明，在n（cat）∶n（CH2∶C（CH3）CH∶CH2）∶\r\nn（H2O2）＝1∶100∶100，θ＝40℃，t＝6h的反应条件下，异戊二烯\r\n转化率为70．8％，3－甲基呋喃选择性为54．8％．提出了异戊二烯脱\r\n氢环氧化可能的反应机理．     

The Synthesis of l-Ethyl-1''''-(4-vinylbenzyl)-4, 4''''-bipyridinium Chloride and Iodide and its Electrochromic Property

A new compound 1-ethyl-1'-(4-vinylbenzyl)-4, 4'-bipyridinium chloride and iodide has been synthesized. The cyclic voltammogram and impedance spectra indicated that a layer of viologen's electrochromic (EC) film could be deposited on conductive ITO glass working electrode. With polyelectrolyte as ionic conduction layer, solid EC devices based on this compound have been assembled and their thickness was about 2.35 mm. When different voltages were added, they showed blue or violet red color. After optimization, its response time was less than 50 ms, the number of redox circulation was over 107 and the color of coloration states could be kept for 3 days. This kind of EC device can meet the demand of electronic ink.     

An atomic electronegative distance vector and carbon-13 nuclear magnetic resonance chemical shifts of alcohols and alkanes

A novel atomic electronegative distance vector (AEDV) has been developed to express the chemical environment of various chemically equivalent carbon atoms in alcohols and alkanes. Combining AEDV and Y parameter, four five-parameter linear relationship equations of chemical shift for four types of carbon atoms are created by using multiple linear regression. Correlation coefficients are R = 0.9887, 0.9972, 0.9978 and 0.9968 and roots of mean square error are RMS = 0.906, 0. 821, 1.091 and 1.091 of four types of carbons, i.e., type 1, 2, 3, and 4 for primary, secondary, tertiary, and quaternary carbons, respectively. The stability and prediction capacity for external samples of four models have been tested by cross-validation.     

Resonance Rayleigh Scattering Spectra of Thorium(IV)-bisazo Dye of Chromotropic Acidprotein Systems and Their Analytical Applications

ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｄｅｔｅｒｍｉｎａｔｉｏｎｏｆｐｒｏｔｅｉｎｓｉｓｉｍｐｏｒｔａｎｔｉｎｂｉｏｃｈｅｍｉｃａｌｓｔｕｄｙ ,ｃｌｉｎｉｃａｌｔｒｅａｔｍｅｎｔａｎｄｆｏｏｄａｎａｌｙｓｉｓ .Ａｓｉｔｉｓｋｎｏｗｎ ,ｔｈｅｃｏｍｍｏｎｍｅｔｈｏｄｓｕｓｅｄｔｏｄｅｔｅｒｍｉｎｅｔｈｅｐｒｏｔｅｉｎｑｕａｎｔｉｔａ ｔｉｖｅｌｙａｔｐｒｅｓｅｎｔａｒｅｓｐｅｃｔｒｏｐｈｏｔｏｍｅｔｒｙａｎｄｆｌｕｏｒｏｓｐｅｃ ｔｒｏｐｈｏｔｏｍｅｔｒｙ.1Ｒｅｃｅｎｔｌｙ ,ｒｅｓｏｎａｎｃｅＲａｙｌｅｉｇ…     

On Ekeland's Variational Principle for Set-Valued Mappings

In this paper,we derive a general vector Ekeland variational principle for set-valued mappings,which has a closed relation to εk~O-efficient points of set-valued optimization problems.The main result presentedin this paper is a generalization of the corresponding result in[3].     

Thermally assisted switching in FePt single-domain particles with a Gaussian distribution of temperature

Magnetic nanoscale systems,including nanodots,nanofibers,nanowires and nanoparticles,are currently attracting great interest due to their interesting physical and promising applications in various fields,such as magnetic recording,sensors,target drugs and catalysts,as well as others.To achieve ultrahigh recording density,the method of heat assisted magnetic recording(HAMR) has been introduced.In this work,with the help of a Monte Carlo method,the mechanisms of thermally assisted magnetization switching in F...     

分光光度法测定人工晶状体中清洗剂磺基琥珀酸二辛酯钠残留

建立分光光度法分析眼科植入物人工晶体中清洗剂磺基琥珀酸二辛酯钠残留的方法。磺基琥珀酸二辛酯在酸性水溶液介质中与亚甲基蓝形成离子对,用三氯甲烷提取并在651 nm波长处测定其吸光度。磺基琥珀酸二辛酯钠的质量浓度在1.0~5.0μg/m L内与吸光度呈良好的线性关系,线性相关系数r~2=0.990 1,检出限为0.4μg/m L。测定结果的相对标准偏差为1.21%(n=6),日间重复性为2.06%(n=6);加标回收率为90%~97%。该方法检出限低,再现性好,适用于人工晶状体中磺基琥珀酸二辛酯钠残留量的测定。     

The influence of X-semipermutability of subgroups on the structure of finite groups

Let A be a subgroup of a group G and X be a nonempty subset of G. A is said to be X-semipermutable in G if A has a supplement T in G such that A is X-permutable with every subgroup of T. In this paper, we investigate further the influence of X-semipermutability of some subgroups on the structure of finite groups. Some new criteria for a group G to be supersoluble or p-nilpotent are obtained.     

LEVITIN-POYAK WELL-POSEDNESS OF GENERALIZED VECTOR EQUILIBRIUM PROBLEMS WITH FUNCTIONAL CONSTRAINTS

In this article, we study Levitin-Polyak type well-posedness for generalized vector equilibrium problems with abstract and functional constraints. Criteria and characterizations for these types of well-posednesses are given.     

中心指数约束的部分双曲系统的遍历性

对于给定紧光滑黎曼流形M上的一个C~2保体积部分双曲微分同胚f,若对所有不变测度的中心方向的指数都满足中心指数约束条件,则f本质可达蕴含遍历.特别地,若对所有不变测度,中心方向指数都为零,则f本质可达蕴含遍历.这一结果部分回答了Pesin提出的两个公开问题.