激光定位焊接半导体激光放大器耦合光纤

在光纤通信系统中,光电器件(如LD,LED,SLA等)的芯片与耦合光纤之间的耦合稳定性对于光电器件的性能和使用寿命有着重要的意义.在光电器件实用化的过程中,陆续产生了一些保证耦合稳定性的方法,如V型槽定位,铟焊法,快速固化胶合法等,这些方法的共同缺点是复杂、可控性低、稳定性差.特别是对于单模光纤与光电器件芯片之间的高效率耦合,由于单模光纤端面一般都做了特殊处理(如锥端类球透镜),因此,伴随着     

反相纸色谱法研究几种烷基-苯基硫醚在HCl介质中的萃取和分离性能

合成了甲基-苯基硫醚,正丙基-苯基硫醚,正丁基-苯基硫醚和正庚基-苯基硫醚。确定了合成产物的组成和结构。用反相纸色谱法考察了四种硫醚在HCl介质中对30余种金属离子的萃取能力。并分别以四种硫醚为固定相对Au~Ⅲ(pd~Ⅱ)-pt~Ⅳ;Au~Ⅲ(pd~Ⅱ)-Os~Ⅳ(Pt~Ⅳ)-Ru~Ⅲ(Rh~Ⅲ);Pd~Ⅱ-Au~Ⅲ-Os~Ⅳ(Pt~Ⅳ)-Ru~Ⅲ(Rh~Ⅲ)等人工混合试液进行了纸上分离。     

应用数学模型模拟膜反应器中丁烷脱氢

建立了模拟真实实验室膜反应器的数学模型：活塞流数学模型。将数学模型与实验数据紧密结合起来，计算出与实验符合得很好的模拟结果。为无机膜反应器的设计和无机膜制备指出了方向。     

Dynamics of increase in muscle fibers in fishes in relation to size and growth

Summary Dynamics of increase of white myotomal muscle fibers of four species of freshwater teleosts (Salmo gairdneri, Pimephales notatus, Esox masquinongy andE. americanus vermiculatus) from three families (Salmonidae, Cyprinidae, Esocidae) representing a variety of maximum attainable sizes and growth rates, have been investigated. There are at least three major differences in these dynamics, and there appears to be an association between the ability of a fish species to attain large size (and grow fast) and its ability to recruit new fibers into this predominant tissue of the myotomal mass.     

ELECTRON BEAM PRE-RADIATION-INDUCED GRAFT POLYMERIZATION WITH UHMWPE FIBERS

In order to improve the surface adhesion of high strength and high modulus poluethylene (PE)fibers with epoxy resin,graft polymerization of some monomers by electron beam(EB)pre-radia-tion was performed on the surtacc of PE fibers.In the paper,the Van de Graft accelerator waschosen as a radiation resource.And we found from our studies that no sensitizer was needed in EBpre-radiation polymerization under the atmosphere of N_2,and acrylic acid was most effective inthe polymerization of methyl methacrylate,acrylic acid and methacrylic acid.The degree of graftincreased with the enhancing of pre-radiation dose,reaction temperature and reaction time.Acetone and benzene were effective solvents for acrylic acid.Oligomer which exists during thepolymerization could be removed by washing with benzene.Grafted fiber was analyzed by SEMand ATR-IR and it was confirmed that some polar groups were introduced to the surface of PE fi-ber.The tensile strength of PE fibers did not decrease greatly when pre-radiation dose was lessthan 1.56×10~4 Gy.     

无机元素化学课程的改革与思考

针对无机元素化学课程的特点,对无机元素化学教材、教学内容、教学方法及考核方式进行了讨论,指出积极开展推进双语教学和网络化教学是无机元素化学课程教学的重点。     

含无机氟废水及其治理措施综述

介绍了含氟废水处理的基本工艺,并根据含无机氟废水来源,探讨了其治理措施。     

电负性连接指数^mJ及对无机氢化物PKa值的预测

受Randie分子连接性拓扑指数^mx的启发,构建了一种新的分子连接性拓扑指数^mJ．^mJ的0,1阶指数^0J,^1J,与P区无机氢化物HaA的PKa值关联,结构选择性满足唯一性表征．     

The generation of new ‘white’ muscle fibers by budding in the lateral musculature of elversAnguilla anguilla (L.) during normal development

Summary The elver is a developmental stage of the European eel Anguilla anguilla (L.). During its growth, relatively large numbers of new muscle fibers are formed in the lateral musculature. We investigated the origin of these fibers. They proved to originate from already existing fibers by budding.     

聚硅酸铝盐絮凝剂絮凝性能与机理研究

讨论不同ｐＨ值条件下合成的聚硅酸铝盐的絮凝特点、不同硅氧基与铝离子摩尔比聚合而成的产物的絮凝行为。该聚合物在不同ｐＨ值的原水中其絮凝性能非常一致,与相同浓度的简单无机铁、铝盐类相比,具有用量少,絮凝速度快,沉淀分离彻底等优点,并以此为基础,定性地分析了聚硅酸铝盐的絮凝性能、聚凝机理与该无机高分子的结构的关系。