What Is Its Real Existing Form?——Theoretical and Experimental Studies on 2-Mercaptobenzothiazole

1 INTRODUCTION The study of heterocyclic molecules with aroma- tic rings and their absorptions on metals is of con- siderable importance from both theoretical and te- chnological points of view. These molecules are in- teresting because of their applications as corrosion inhibitors and flotation collectors, and their abilities to form self-assembly layers[1]. 2-Mercaptobenzo- thiazole (C7H5NS2, in the following MBT) is an important heterocyclic molecule, which can be used as corrosion …     

Recombination Efficiency in Double-Layer Organic Light-Emitting Devices

We analyse the influence of properties of organic/organic interface (OOI) on the characteristics of recombination efficiency of organic double-layer light-emitting diodes. Based on the disordered hopping theory model, spatial and energetic disorder of hopping states are also discussed for the case of space charge limited currents in hole transmitting layers but injection-limited currents in electron transporting layers. The results show that the recombination efficiency increases firstly and then decreases for different OOI parameters, and there is a maximum value changed with different spatial disorder parameters and energetic disorder scale. Different spatial disorder parameters make carrier mobilities change greatly, and the energetic disorder scale causes various localized state densities. Our calculated results are qualitatively in agreement with the experimental data.     

爆炸驱动动能杆定向抛撒散布试验

动能反导技术作为新型的反导技术，原理是在拦截弹和目标的相对速度方向上，抛射出大量动能杆条毁伤目标。其核心技术之一就是动能元素的抛撒，特别是定向抛撒。国外研究一般集中针对既定抛撒装置结构的杆条抛撒结果验证性报道，缺乏对杆条抛撒影响因素的详细研究。本文提出了采用周向弧形状药选择区域爆炸驱动中心杆条束定向侧向飞散的动能扦定向抛撒装置方案，设计不同结构参数的杆条定向抛撒装置的试验，研究抛撒结构参数对动能杆的驱动特性影响规律，为新概念反导战斗部设计提供技术帮助。     

一种漂移室定位子性能反常现象的研究

研究了一种漂移室定位子性能的反常现象,它关系到定位子的使用寿命．着重测量了暗电流和随机噪声与时间、高压及温度的关系.     

用辉光放电发射光谱对镀锌铁板钝化防护层的逐层分析

本文应用辉光放电发射光谱分析技术，以纯金属作标样，对几种用不同工艺处理的镀锌铁板钝化防护层进行逐层定量分析。得到了镀锌板中锌、铁的含量随浓度变化的曲线，取得了满意的分析结果，为铁板镀锌钝化防护层的工艺研究提供了可靠的依据。     

对邓小平理论历史地位的认识

邓小平理论作为我们党的指导思想，在我党历史上具有重要的历史地位。本文拟结合自已对邓小平理论的学习，谈谈对其地位的认识。     

遗忘因子法在盐酸氯丙咪嗪注射液紫外分光光度分析中的应用

随着计算机技术的日益普及和计算分光光度法研究的不断发展,多组分混合物的分光光度同时分析变得愈来愈简便,各种方法被不断开发并得以应用。遗忘因子法(Forgetting Factor Algorithm,FFA)是一种递推的适应最小二乘方法,它保留了     

CYTOPLASMIC EFFECT ON GENE FUNCTION IN Xenopus laevis

The pigmentation gene of Xenopus laevis is dominant and that of albino a~p mutant recessive. Hete-rologous haploid hybrids are produced by UV inactivation of the egg nuclei during second polar body for-mation in the mutant sperm-fertilized Xenopus eggs. During development of these hybrids, melanin ap-peared in the eye and melanophores in the skin at stages comparable to those of the wild type, but muchearlier than in the albino mutant. The number and intensity of pigment cells are interinediate betweenthe black Xenopus and albino mutant. While a number of pigment cells remain in the hybrids, thosein the albino eventually degenerate. Therefore, the development and maintenance of pigmentation in hete-rologous hybrids are contributed by Xenopus cytoplasm. Tadpole tail-tips were squashed and stained for chromosome counting. The results show thatXenopus and mutants are diploid (36 chromosomes) and heterologous haploid hybrids have 18 chromosomes.     

两种结构钼磷酸的催化氧化行为

考察了Dawson与Keggin结构钼磷酸的催化氧化行为,并与结构特性进行了关联,结果发现,Dawson结构的杂多酸对氧化脱氢及插入氧反应均有更高的活性。     

稀土氧化物EuO_x对Pt/CeO_2材料在甲苯催化燃烧中的显著促进机制（英文）

挥发性有机污染物是大气环境中一类重要的污染物质,其污染控制问题已成为21世纪大气污染控制的优先方向之一.甲苯作为一种典型芳香烃在医药、农药、染料合成等多个化工行业中常用作有机化工原料并被排入大气环境,对人类的生产和生活造成极大危害.由于其高致癌性,甲苯在2017年被世界卫生组织国际癌症研究机构列为3类致癌物.在甲苯的催化燃烧降解中,负载型铂基催化剂由于其高效的低温催化活性被学者广泛研究.CeO_2作为一种典型的稀土金属氧化物具有较强的储放氧能力和高温稳定性,被视为负载型贵金属催化剂的优良载体.近期研究表明, EuO_x具有良好的催化氧化活性,并能促进金属氧化物表面氧缺位的形成.为了进一步研究EuO_x与CeO_2之间的协同效应对贵金属基催化剂低温催化性能的影响,我们利用表面模板剂法合成了具有不同Eu负载量的Pt/Eu_2O_3-CeO_2材料并应用于甲苯的深度催化氧化.研究表明, EuO_x的加入显著提高了Pt/CeO_2材料的催化性能,当Eu含量为2.5at%时(Pt/EC-2.5)该材料拥有最佳的低温氧化活性,可在200°C实现对0.09%甲苯的完全降解,在160°C时反应速率和转化频次分别高达0.9 mmolg~(–1)s~(–1)和5.52×10~2s~(–1).相比于Pt/CeO_2催化剂, EuO_x与CeO_2之间的协同作用极大提高了催化剂的氧化还原性能,增大了材料表面晶格氧和Ce3+的含量,并显著提高了贵金属活性相的分散度.通过原位漫反射红外光谱在线分析了甲苯在Pt/Eu_2O_3-CeO_2材料表面的深度降解机理.与甲苯在Pt/CeO_2材料表面的氧化行为相比,甲苯在Pt/EC-2.5催化剂表面的降解遵循典型的Mars-vanKrevelen(MvK)机理.当吸附于稀土金属氧化物载体后,在Pt活性位点、晶格氧及表面酸性位点的联合作用下,甲苯以酮类和醛类为主要的中间产物,被迅速深度氧化为H_2O和CO_2.