The Photopolymerization Kinetics of Acryl amide Sensitized with Toluidine Blue-Alcoholamine Induced by He-Ne Laser

Toluidine blue(TB) is a good sensitizer for the polymerization of acrylnmide(AM) induced by He-Ne laser. With TB as a sensitizer and various alcoholamine as donors, the photoredox of TB and the polymerization kinetics of AM induced by He-Ne laser were investigated. It was found that either for the photoredox of TB or for the polymerization of AM, the activity of alcoholamine increases in the order of EOA相似文献   

辣根过氧化物酶对心肌线粒体过氧化损伤的保护作用

以黄嘌呤氧化酶／次黄嘌呤自由基诱生系统建立了稳定的离体心肌线粒体的损伤模型，并应用此模型研究辣根过氧化物酶对心肌线粒体自由基氧化损伤的保护作用，结果表明，辣根过氧化物酶能抑制心肌线粒体中氧自由基的形成，降低膜脂的过氧水平，保护了线粒体膜酶活性，有效地防止自由基对线粒体结构和功能的损伤。     

一种新型锂离子电池用聚合物电解质复合膜的制备和性能表征

阐述了一种新型锂离子电池用PVDF-HFP(聚偏氟乙烯-六氟丙烯聚合物树脂)基聚合物电解质复合膜的制备过程. 对复合膜中使用的无机TiO2纳米颗粒进行固体超强酸化处理, 并进行颗粒表面酸强度H0测试、XRD晶体结构分析以及复合膜的电解液吸附率测试和电化学阻抗谱测试. 采用PE无纺布支撑体作为增强材料, 以浸涂方法制备复合膜,并进一步组装为锂离子电池, 性能测试表明该电池具有良好的电化学性能.     

原子簇P12（D3d）的理论研究

利用Ｇａｕｓｓｉａｎ－９２程序在６－３１Ｇ基组下优化Ｐ１２（Ｄ３ｄ）构型，研究了３Ｐ４（Ｔｄ）→Ｐ１２（Ｄ３ｄ）的相对能量，计算结果为△Ｅ＝Ｅｐ１２（Ｄ３ｄ）－３Ｅｐ４（Ｔｄ）＝－７９．８４４ｋＪ／ｍｏｌ，优化Ｐ１２（Ｄ３ｄ）获得的Ｐ－Ｐ键键长接近于实验测得的Ｐ－Ｐ单键键长，并进一步在该基组下计算了Ｐ１２（Ｄ３ｄ）原子簇的振动频率，得到的全部为正频率，表明原子簇Ｐ１２的Ｄ３ｄ构型是位能面上的稳定点     

螺旋共轭分子2,2′-螺二茚-1,1′, 3,3′-四酮及其衍生物的二阶非线性光学性质与分子结构关系的研究

采用AM1和ZINDO系列方法研究了螺旋共轭分子2,2′-螺二茚-1,1′, 3,3′-四酮及其含氮衍生物的几何构型和各分子的稳定构型, 并以稳定构型为基础, 计算了这些分子的电子光谱、二阶非线性光学系数βμ, β0及电荷转移, 考察了取代基变化对βμ的影响. 计算结果表明, 所设计分子兼具较大的二阶非线性光学系数和较高的透过率, 有希望成为一类新型的二阶非线性光学材料.     

铈离子与氨基甲酸酯类化合物引发丙烯酰胺聚合的研究

本文对铈离子与苯基氨基甲酸酯类化合物在H_2O-CH_3CN(3∶1,V/V)及H_2O-HCONH_2(1∶2,V/V)两种介质中引发丙烯酰胺的聚合进行了研究。考察了不同结构的苯基氨基甲酸酯对聚合的影响。苯基氨基甲酸酯类化合物对铈离子引发聚合均有促进作用,其中对-甲苯基氨基甲酸酯的促进作用最为显著。测定了聚合反应表现活化能及聚合动力学方程,并提出了聚合反应机理。     

2′,3′-乙氧甲撑基腺苷5′-硫代磷酰氨基酸酯的合成和谱学分析

核苷磷酰氨基酸酯化合物是一类倍受重视的药物 ,特别是它可作为寡聚核苷酸的类似物用于反义药物 [1] .HIV逆转录酶是治疗艾滋病的有效靶点 ,目前普遍使用的抗 HIV核苷类似物中 ,2′,3′-双脱氧核苷 (dd Ns)具有良好的疗效 [2 ] .苯氧基取代的核苷 -磷酰氨基酸酯是 HIV逆转录酶的有效抑制剂[3 ] ,其药物毒性比 dd Ns低 ,但容易在体内被核酸酶水解 .由于硫代磷酸对核酸酶具有抵抗性 ,它可以抑制核酸酶对它的水解 [4 ] ,因此我们设计合成了核苷 5′-硫代磷酰氨基酸酯化合物 ,希望开发出一种全新的 HIV逆转录酶抑制剂 .由于分子中引入氨基…     

Mechanisms and Kinetics of Reactions of the O（^1D,^3P） ＋ CF3Cl System

In the stratosphere,CF3Cl(CFC13)can either photodecompose or react directly with atomic oxygen to generate ozone-depleting agents such as Cl and ClO in the gas phase[1—3].Since the1970s,attention has been focused on the effects of these compounds on the …     

Electrochemical Characteristics of Mg0.9Ti0.1-xZrxNi （x=0.02, 0.04, 0.06） Alloys

Mg-based hydrogen storage alloys Mg0.9Ti0.1-xZrxNi (x=0.02, 0.04, 0.06) were successfully prepared by means of mechanical alloying (MA). The effects of Zr addition on the discharge capacity and the cycle performance of the Mg-based electrodes were also studied. It was found that the discharge capacities were improved with addition of a small amount of Zr and the cycle performances of the alloy were stabilized with the addition of Ti. The effects of surface modification or coating on the properties of Mg0.9Ti0.06Zr0.04Ni were also studied. The results indicated that coating with graphite improved both the discharge capacity and cycle life of the amorphous Mg0.9Ti0.06Zr0.04Ni electrode.     

IMMOBILIZATION OF POTENTIALLY BIOACTIVE MOIETIES ONTO POLYETHER WITH POLY(ETHYLENE GLYCOL)-SULFONATE SPACER

A new reactive graft copolymer, poly(tetramthylene glycol) - graft-w-propyl sodiumsulfonate-poly(ethylene glycol) (PTMG-g-PEG-CH_2CH_2CH_2SO_3~-Na~+), was synthesizedby the cationic polymerization of a-w-bifunctional PEG macromonomer (O?CH_2—PEG——CH_2 CH_2 CH_2 SO_3 Na) and THF. The obtained copolymer exhibits the expected structureas indicated by the result of characterization. Two amino acids (L-arginine, L-tyrosine)were covalently attached to the copolymer after converting the sulfonate group to sulfonylchloride. So the new reactive graft copolymer (PTMG-g-PEG-CH_2CH_2CH_2SO_3~-Na~+) isexpected to be very useful in attachment of potentially bioactive moieties to polymer viaa hydrophilic PEG spacer.