The research consist of four parts . the first part is multiplication , purification and electron microscope examination of the avian encephalomyelitis virus . a 1 : 5 dilution of isolate - nh937 of aev and control group of pbs were inoculated to susceptible 6 - day - old chickens embryos . respectively . after incubation for 10 days , the urinay vesicle liquid was collected . making a comparison the size of the chickens embryos between the test group and the control group , the results showed that the size of the control group is bigger than that of the test group . purified virions were examined under the electron microscope , the result revealed that there are a lot of virions and the aev - nh937 was multiplicated in embryos . the second part was seguence analysis of the genome of the aev - nh937 . nine pairs of primers were designed according to published calnek vaccine strain of aev 本研究共分四个部分：第一部分为aev的增殖，纯化和电镜观察，用1 : 5倍稀释的aev - nh937株和阴性对照pbs分别经卵黄囊接种于6dspf鸡胚，继续孵化10d后，收集尿囊液。比较接种组和健康对照组鸡胚的大小，结果显示，健康对照组鸡胚明显大于接种组。分离、提纯aev ，把纯化的病毒在电镜下观察，证明确有大量aev病毒粒子存在，说明aev在鸡胚中成功扩增；第二部分是aev - nh937基因组的序列测定工作。
The mechanism enhancement of the optical brightener is not known . shapiro et al . postulated that selected brightener including m2r inhibit or alter the chitinous peritrophic membrane ( pm ) , creating gaps in the membrane or gut lining and perhaps allowing more virions to pass from the gut lumen into the hemocoel 光增白剂对杆状病毒的增效作用的机理存在两种推测一种观点认为光增白剂是通过破坏围食膜结构的完整性，促使更多的病毒粒子穿越围食膜而发动感染的；另一种意见认为光增白剂能延迟中肠上皮细胞的脱落，促进病毒的复制繁殖。
Influences on host plant cell pathology by tumv infection tumv particles were scattered in cytoplasm area of diseased cells separately or in bundles . the pinwheels , scrolls and laminated aggregates , which were the cross sections of cylindrical inclusion bodies , were observed under transmission electron microscope . meanwhile , pathological changes of diseased chloroplasts " morphology and structure took place Tumv侵染寄主的细胞病理学特征利用透射电镜观察接种寄主细胞的超薄切片，分离自杭州榨菜上的tumv分离物jc - 1在青菜和芥菜的细胞质中病毒粒子分散或成束分布；细胞质中存在不同形态的柱状内含体，分别为风轮体、卷筒体、片层聚集体；同时，叶绿体发生了形态和结构上的改变。
Thin sections of host leaf cells infected by bbwv - 2 isolate b935 , which were gold - labeled by antibodies of bbwv - 2 coat protein ( cp ) and vp37 , respectively , were prepared to elucidate the locations of vp37 in cell and possible function of vp37 and cp in cell to cell movement . observation in electron microscope showed that virus particles were presented not only in cytoplasma but also in chloroplast , while vp37 was existed only in cytoplasma and associated with tubular structure through the cell wall 为研究vp37在寄主细胞中的作用机制及其在细胞中的分布，通过胶体金间接标记6his - vp37兔抗血清，同时还标记了病毒的外壳蛋白单克隆抗体，对bbwv - 2分离物b935感染的病叶超薄切片的电子显微镜观察发现：病毒粒子除了聚集在胞质中，还存在于寄主的叶绿体内； vp37蛋白能在细胞壁上形成管状结构，在胞质中亦有分布。
Mr albert lam , director - general of civil aviation today ( may10 ) said that the entire passenger fleets of the two hong kong based airlines are equipped with very efficient hepa ( high efficiency particulate arrester ) filters to remove viruses , and that aircraft itself is not a high risk environment for virus transmission 民航处处长林光宇今日（五月十日）表示，两间本地航空公司的机队均已安装了高效能过滤系统，能有效隔除病毒粒子。飞机本身并非传播病毒的高危环境。
