美洲大蠊尾须背面超微形态的观察

尾 为蜚蠊腹部末端的一对刺形附属构造,在肉眼下腹面降起,背面光滑;在解剖镜下可见腹面有“毛刺”、背面平滑,在扫描电镜下观察可见闰洲大景尾须背面也有许多特殊构造,有节间突起,刺形感器Ａ,此外尚以观察凹窝状构造和丝状物。     

Neoschwagerina副隔壁的超微构造

副隔壁(septula)是二叠纪高等类Neoschwagerinidae分子所特有的一种壳壁构造,它将类动物的房室分割成许多小房室,从而起着加固类壳体的作用。副隔壁的构造、形态及发育程度是识别类有关属、种的重要标志,在Neoschwagerinidae的分类及演化研究中具有重要意义。本文将根据对Neoschwagerina sp.若干标本进行扫描电镜研究的结果,简要介绍Neoschwagerina副隔壁的超微构造特征。     

VEGFmRNA and eNOSmRNA expression in immature rabbits with bleomycin-induced pulmonary hypertension

Objective: To investigate the evolution of pulmonary hypertension, the pathological changes of pulmonary arteries, and the expression of VEGFmRNA and eNOSmRNA of pulmonary arterial endothelial cells in immature rabbits treated with intratracheal bleomycin (BLM). Methods: Immature rabbits were divided into control and BLM group. Two and four weeks after intratracheal normal saline or BLM injection, the systolic, diastolic and mean pulmonary artery pressure (PASP, PADP, MPAP) were measured by micro-catheter; the pathological changes and the expression of VEGFmRNA and eNOSmRNA of endothelial cells in pulmonary arteries were evaluated by HE and in situ hybridization.Results: Two and four weeks after intratracheal injection of BLM, the PASP, PADP and MPAP increased 53%, 49%, 52%in 2 weeks, and 43%, 89%, 56% in 4 weeks; the wall thickness increased and the cavity in middle and small pulmonary arteries became narrow; the Thickness Index (TI) and Area Index (AI) increased 25%, 14% in 2 weeks, and 22%, 24% in 4 weeks; the level of VEGFmRNA and eNOSmRNA expression decreased 46%, 43% in 2 weeks, and 43%, 51% in 4 weeks.There was no significant difference between 2 weeks and 4 weeks BLM groups. Conclusion: The pulmonary artery pressure was elevated, the thickness of wall increased and the cavity became narrow in middle and small pulmonary arteries, and the level of VEGFmRNA and eNOSmRNA expression in pulmonary arterial endothelial cells decreased in immature rabbits after 2 weeks and 4 weeks of intratracheal 4 U/kg BLM injection.     

禽流感流行与防制现状

禽流感是禽的烈性传染病，对养禽业造成严重危害，同时威胁着人类的健康．本文对国内外禽流感近年来的流行情况、禽流感病毒的特征及危害、临床症状和病理变化、禽流感的诊断技术和防治进行了综述．     

"JT烧伤液"对烧伤感染细菌作用的超微观察及研究

本文利用扫描电子显微镜观察“JT烧伤液”对烧伤感染细菌作用的超微现象.结果表明,“JT烧伤液”对金黄色葡萄球菌（S·Aureus G+）和志贺氏痢疾杆菌（Shigrellre G-）有明显的杀伤和抑制作用,为临床推广和使用“JT烧伤液”治疗烧伤创面提供一定的参考依据.     

沉淀法合成钛酸铝陶瓷粉末的研究

用共沉淀法和半醇盐法成功地合成出具有高熔点，低热膨胀系数特性的钛酸铝陶瓷粉末材料，主要研究影响共沉淀产物的主要因素：溶液浓度，ｐＨ值和温度等。并提出合成过程中最佳工艺条件，对合成Ａｌ２ＴｉＯ５初产物做ＤＴＡ热分析实验表明，半醇盐法制备的Ａｌ２ＴｉＯ５粉末结晶温度最低，粒径小，分散均匀。     

碳酸盐岩烃源岩有机岩石学特点和有机组分分类

采用反光、透光、荧光和透射电镜相结合，全岩光片和干酪根光片相对比的有机岩石学方法，对我国不同时代碳酸盐烃源岩有机岩石学特点和有机组分特征进行了分析，并提出碳酸盐烃源岩有机组分分类。     

分子流处理下气体透过法的研究

气体透过法已经被用来测量粉末的比表面和粒度。细粉末和超微粉末在稳定流动下,伴随有分子流效应。这个效应,30多年来没有从计算上很好解决。本文已解决此问题。     

关于a--FeOOH的生成条件及机理研究

本文主要研究了温度、通气量等条件对生成d-FeOOH的影响.用电子显微镜观察了结晶形态,用X-衍射和电子衍射确定了相组成及晶体结构.并用电位法对其生成机理进行了探讨.