麻黄蚜实验种群的生命表

麻黄蚜虫EphedraphisgobicaSzelegiewicz是危害中药材———草麻黄的重要害虫之一。通过室内饲养 ,构建了该蚜虫的实验种群生命表。结果表明 :该蚜虫的内禀增长率 (rm)、周限增长率 (λ)、净增殖率 (R0 )、种群世代平均周期 (T)和种群加倍时间 (t)分别是 :0 2 60 ,1 2 98,1 9 2 48,1 1 3 5 4和 2 661。     

An investigation of dye plants and their colourant substances in the eastern Mediterranean region of Turkey

Plants traditionally used to dye carpets and woven matting in the eastern Mediterranean region were investigated. The survey was carried out in Kadirli, Feke, Aladağ, the surrounding villages of Adana, and in Osmaniye (Turkey). According to the survey results, 37 species of plants belonging to 29 families were used in natural dye production. The total dye contents of collected plants ranged from 1.5% to 10.0%. Mordants and dyes obtained from some of these plants were used to treat wool yarn and the yarn's dyed properties were tested. Some of the plants were also examined in terms of cultivation and fifteen were transferred to a Dye Plants Collection Garden. They were Alnus glutinosa (L.) Gaertn. ssp. antitaurica Yalt., Arctium minus ssp. pubens (Bab.) Arènes, Chrysanthemum segetum L., Cistus creticus L., Cotinus coggygria Scop., Datisca cannabina L., Galium verum ssp. glabrescens Ehrend., Isatis tinctoria ssp. tomentella (Boiss. & Balansa) P.H.Davis, Melissa officinalis ssp. inodora Bornm., Mentha longifolia (L.) Huds. ssp. longifolia , Reseda lutea var. lutea L., Rhamnus oleoides ssp. graecus (Boiss. & Reut.) Holmboe, Rhus coriaria L., Rubia tinctorum L., and Rumex patientia L.  © 2004 The Linnean Society of London, Botanical Journal of the Linnean Society , 2004, 146 , 71–77.     

The plastidic Arabidopsis protoporphyrinogen IX oxidase gene, with or without the transit sequence, confers resistance to the diphenyl ether herbicide in rice

Agrobacterium‐mediated gene transformation was used to introduce plastidic protoporphyrinogen IX oxidase (Protox) genes from Arabidopsis, with and without the transit sequence, into the rice genome. They were placed under the control of the constitutive and ubiquitous maize ubiquitin promoter, and their abilities to confer resistance to the diphenyl ether‐type herbicide, oxyfluorfen were compared. The integration and expression of the transgene in the T₁ generation was examined by Southern, northern and western blot analyses. Surprisingly, as judged by an in vivo seed germination assay and an in vitro cellular leakage assay, both lines were similarly resistant to oxyfluorfen. The tolerance to cellular damage (lipid peroxidation and electrolyte leakage) was higher in transgenic plants than in wild‐type plants. In transgenic plants, the degree of herbicide resistance varied directly with the absolute amount of Protox protein expression. Both the intact protein and the protein with the transit sequence deleted were accumulated in plastids.     

医院动物实验工作人员的素质要求和培养

动物实验人员的素质是决定医院动物实验工作质量的重要因素．但通常被忽视。随着动物实验标准化进程的不断推进,提高动物实验工作人员的素质、增强专业技能就显得尤为重要。本文结合我院实践主要阐述综合性医院动物实验工作的特点、对动物实验工作人员基本素质的要求以及培养和提高的途径。     

冷却肉糜辐照脂肪氧化影响因素与抑制效果研究

研究了低剂量辐照、抗氧化剂、包装条件以及贮藏时间等影响辐照冷却肉脂肪氧化的主要因素和抑制效果.结果表明,对冷却猪肉的辐照处理会加剧其脂肪的氧化,真空包装或无氧包装可以明显的降低贮藏期间辐照冷却肉的脂肪氧化.辐照处理前在肉糜中添加抗氧化剂并采用真空包装时, 肉糜可以贮藏2周以上而不产生脂肪氧化.比较几种主要的抗氧化剂的效果表明,茶多酚在抑制辐照冷却肉糜脂肪氧化方面效果最好.     

肝细胞生长因子对主要器官/组织损伤的修复作用

肝细胞生长因子(HGF)是一种多功能的生长因子,它参与多种细胞的增殖、迁移和形态发生。HGF对多种成熟的器官／组织有营养修复作用,促进肝、肾、肺等损伤器官的再生,同时也是神经系统新的营养因子之一。本综合近年来有关献对HGF在主要器官或组织损伤中的修复作用作一概括性介绍。     

松香改性的研究进展

本文综述了近年来松香改性的研究进展情况,对其进行了分类阐述,即基于羧基的改性、基于双键的改性、基于羧基和双键的改性以及其它方面的改性,并展望了此领域的发展趋势和前景。     

沙柳灌丛植株形态与气流结构野外观测研究

通过野外观测,研究了毛乌素沙地南缘平沙地人工栽种单行沙柳灌丛的植株形态与气流结构.结果表明,沙柳灌能降低迎风侧和背风侧的近地面风速,使沙粒在植株下部沉积.积沙体积(V₂)与植株体积(V₁)相关性较高(R=0.696).单行沙柳灌丛在4 m高处风速为6 m·s^-1时的气流结构特征为:迎风侧3H处风速已降低,2 H处风速又得到加强,之后在背风侧迅速降低,1 H处达到最低值,然后逐渐恢复到旷野风速.防护距离约为17H',有效防护距离约为13 H'.沙柳灌丛对植株高度以上高度处风速影响较小.     

北京市11种园林植物滞留大气颗粒物能力研究

测定了北京市11种园林植物叶面颗粒物附着密度,利用环境扫描电镜观察比较了各测试树种叶表面微形态,测量统计了滞留颗粒物的粒径分布.结果表明,植物主要通过叶片上表面滞留大气颗粒物,上表面滞留的大气颗粒物数量约为下表面的5倍;叶片上表面滞留大气颗粒物能力由高到低的微形态结构依次是沟槽>叶脉＋小室 >小室>条状突起,并且结构越密集、深浅差别越大,越有利于滞留大气颗粒物;测试树种叶片上、下表面PM_2.5和PM₁₀平均百分含量分别为66.7％和98.3％与 43.4％和92.9％.     

非小细胞肺癌的治疗方案及影响预后的重要因素

目的:回顾分析各种非小细胞肺癌(non-small cell lung cancer,NSCLC)的治疗方案及影响其治疗预后的因素,为合理制定个体化的综合治疗方案提供参考。方法:回顾分析近年来NSCLC治疗的研究报道,分析如病理分期、实验室检查结果(VEGF、WBC、Hg等)影响治疗预后的因素,建议相应的治疗对策。结果:1.Ⅰ期、Ⅱ期及部分Ⅲa期NSCLC的患者治疗措施首先以手术治疗为主,同步放化疗比单纯放、化疗及序贯放化疗更能有效改善晚期NSCLC的预后;2.个体相关因素、肿瘤相关因素和治疗相关因素影响NSCLC治疗预后。结论:同步放化疗在晚期NSCLC的治疗中有重要作用,肿瘤的病理分期、血浆VEGF浓度是影响NSCLC预后的独立因素。