正则F集空间中的度量拓扑

本文证明了Ｒ＾ｎ上正则Ｆ集收敛拓扑空间是完备的、可分的度量空间，给出了该种度量的具体表达形式。本文还讨论了弱收敛度量拓扑与正则Ｆ集上另外两种度量拓扑－一致收敛拓扑及积分收敛拓扑－之间的关系。     

类立克次氏体的鉴定及其在系统感染小麦植株中的胞间转移

本文论述经电子显微镜观察、诊断后证明,小麦黄化卷叶病系类立克次氏体(RLO)侵染所致。病原物的形态结构及其在寄主植株内的分布具有典型的类立克次氏体特征。在寄主维管束的韧皮部、木质部均能见到RLO。导管中RLO颗粒与一些弥漫于导管中的电子致密物质关系密切,经常可见原木质部的管壁,有时是成熟的导管壁受到腐蚀而形成孔道,RLO可经这些孔道进入相邻细胞和细胞间隙。筛管中可见大量RLO,它们可以经过筛孔进入另一筛分子。RLO穿越细胞壁的位置大多在胞间连丝密集区,或纹孔区。这些地方连丝间的次生壁因RLO的侵染而消融形成孔道。少数胞间孔道与胞间连丝或纹孔无关。基于上述观察结果,对该病原物造成寄主系统感染的机制进行了讨论。     

IDENTIFICATION OF A RICKETTSIA-LIKE ORGANISM AND ITS INTERCELLULAR MOVEMENT IN SYSTEMATICALLY INFECTED WHEAT PLANT

According to the electron microscopic observation the wheat yellow curl-leaf disease wascaused by a rickettsia-like organism (RLO). The morphology and structure of the pathogenand its distribution within the host plant were of typical characteristics of the RLO. RLO_Swere seen in the phloem and xylem of the host plant. In xylem elements RLO particleswere closely related to electron-dense materials spreading in them. Some channels wereformed in the cell walls of protoxylem, and sometimes in the cell walls of mature xylem ele-ments which were eroded. RLOs entered adjacent cells and intercellular spaces via thesechannels. A large number of RLOs were seen in sieve elements and they could get intoadjacent sieve elements via sieve pores. The places of intercellular movement of RLOs weremostly in the plasmodesmata-dense areas or pit fields where the primary cell walls amongplasmodesmata were dissolved to form some channels by the invasion of RLOs. And theforming of less intercellular channels did not relate to plasmodesmata and pit fields. Basedon these results the mechanism of systematical infection of host plant caused by the RLO isdiscussed in this paper.     

ACTA PHOTONICA SINICA

本文采用有效折射率方法对Ti扩散Er     

非均相催化氢化CO2合成醇：Ⅱ.双金属交换顺序及离子交换液pH值…

用ＸＰＳ分析由离子交换法制备的Ｒｕ－Ｃｕ双金属非均相催化剂，考察双金属交换顺序对催化剂性能的影响。结果表明，交换顺序对催化剂性能影响较大，先交换铜离子后交换钌离子有助于提高催化剂的活性。低价态金属元素是催化剂在反应状态下的活性组分。此外，离子交换液的ｐＨ值对催化剂性能的影响也较大，ｐＨ值偏碱性时有助于催化剂活性的提高。     

三甲基硅取代PPO和三苯基硅取代PPO及其气体选择透过性能

讨论了聚２，６－二甲基－１，４－苯撑氧（ＰＰＯ）与三甲基氯硅烷和三苯基氯硅烷的反应，合成了一系列取代含量不同的三甲基硅取代ＰＰＯ（ＴＭＳ－ＰＰＯ）和三苯基硅取代ＰＰＯ（ＴＰＳ－ＰＰＯ）。研究了取代基团不同和取代含量变化对聚合物的气体选择透过性能的影响。发现ＴＭＳ－ＰＰＯ的气体透过系数随三甲基硅取代量加大而增高，分离系数下降，ＴＰＳ－ＰＰＯ的气体透过系数和分离系数都随三苯基硅取代量的增加而下降，ＴＰ     

GAS SEPARATION PROPERTIES OF FREESTANDING FILM OF POLYANILINE

The gas separation properties of free- standing film of polyaniline (PANI) for gas pairs of He/N2, H_2/N_2. CO_2/N_2 and CO_2/CH_4 at room temperature were measured as a function of the protonation state. Variation of the gas permeabilities coefficient of PANI with an insulator to metal transition upon the protonation processes was observed, which might be due to a change in both gas solubility coefficient and diffusion coefficient with the protonation state.     

钌(Ⅲ)-硫氰酸钾-罗丹明B体系高灵敏度显色反应的研究

分光光度法测定钌多数是应用二元络合物的显色反应。近年来钌的三元络合物显色反应正在进行研究。本文拟定了当表面活性剂聚乙烯醇存在下,Ru(Ⅲ)