生物学

Department of Biochemistry and National Laboratory of Medical Molecular Biology, School of Basic Medical Sciences, Peking Union Medical School, Beijing 100005, China

中国协和医科大学基础医学院生物化学与分子生物学系，医学分子生物学国家重点实验室，北京 100005

Biological characteristics of the pathogen and the resistance of 13 cultivars of tea plant to tea brown blight were studied by means of natural infection in the field and artificial inoculation in vitro. Resistant cultivars and susceptible cultivars of tea plant were divided. And the resistance mechanism was researched tentatively. The findings are as follows: 1 Some biological characteristics of the pathogenic fungus The experiment result showed: the optimum temperature for the growth of fungus mycelium was from 24 to 27℃, the optimum temperature for sporulation ranged 22 to 30℃. Treated at 54℃ in 10 minutes, the spores didn't germinate. The optimum pH for the growth of the mycelium was 5.1～5.9, the optimum pH for sporulation ranged 5.0～6.0. Light had no much effect on the growth of fungus mycelium, but had much effect on the reproduction of the spore.

首先，研究了茶云纹叶枯病病菌的生物学特性；其次，通过田间抗性调查和室内人工接种鉴定，对 13 个茶树品种进行了抗病性鉴定；第三，在前人研究的基础上，对茶树抗病机理作了更深入的研究，结果发现： 1 病原菌的生物学特性病原菌的分生孢子萌发的最适温度范围为 24～27℃，菌丝生长的最适温度范围为 22～30℃；致死温度为 55℃；菌丝生长的最适 pH 范围为 5.1～5.9，孢子萌发的最适 pH 范围是 5.0～6.0；光照对病菌生长速度及分生孢子萌发影响不大，但对其产孢的影响很大，特别是有光照与无光照处理之间差异显著，光照有利于分生孢子的形成。

In this study, isolation of pathogen and study on some biological characteristics was performed in several breeding sheep farms by routine methods and molecular biological methods.

本研究采用常规方法和分子生物学方法对石河子部分发病羊场疑似绵羊传染性胸膜肺炎的病例进行了病原分离及部分病原生物学特性的研究。

This article author in to the high school biology teaching present situation investigation foundation in, proposed in the high school biology experiment exists question and solution, for reference.

本文作者在对高中生物学教学现状调查的基础上，提出高中生物学实验中存在的问题及解决的办法，供参考。

This paper introduced the advances of research in roots recently,it included physiology,molecular and cell biology of root systems with th...

简要介绍了国内外近年来在根系生理与分子生物学，根系细胞生物学以及研究方法方面的研究进展，以供根系研究参考。

Presently, the study of hypoxia and its adaptation mechanism is mainly focus on the oxygen intake related system, include respiratory, circulatory and central nerve system which was highly sensitive to the concentrition of oxygen.

目前，研究者采用分子生物学、分子遗传学、细胞生物学、免疫学及电生理学等多种技术和手段，在整体、器官、组织、细胞和分子水平上，对神经、血液-造血、循环、呼吸及内分泌等系统在低氧条件下其功能的改变及低氧适应机制进行了较全面和系统的研究。

the construction of the double helix model of DNA is the most important biological discovery in 20th century, and it has laid the foundation for modern molecular biology successfully.

DNA 双螺旋模型的建成是20世纪生物学领域极为重要的发现，它为现代分子生物学的发展奠定了基础。

the construction of the double helix model of DNA is the most important biological discovery in 20th century, and it has laid the foundation for modern molecular biology successfully.

DNA双螺模型的建成是20世纪生物学领域极为重要的发现，它为现代分子生物学的发展奠定了基础。

ND-1 scFv was labeled with 〓Tc by MTD.〓Tc-ND-1 scFv was injected into mice bearing the CCL-187 xenograft for biodistribution study, radioactivity in blood, tumor and normal tissue was determinated at various time periods following injection by a gamma scintillation counter, and the ratios of radioactivity between tumor tissue and normal tissue were evaluated. Radioactively- labled scFv displayed rapid localization in tumors. Accumulation was found in tumors in high concentrations 1 hour after injection, and scfv uptake in tumor was 2.6 times higher than in blood. The T/NT for blood, liver, spleen , hear, lung and kidney were 2.61, 1.85 1.94, 1.75, 0.83 and 0.22 respectively.

将ND-1scFv与同位素〓Tc偶联制备〓Tc-ND-1scFv，注入荷瘤裸鼠体内，观察了偶联物的体内生物学分布，结果显示，〓Tc-ND-1scFv在荷瘤裸鼠体内的生物学分布带有明显的肿瘤积聚趋向，注射1小时后即可选择性地积聚于肿瘤组织，其放射性明显高于大多数正常组织，除肾脏和肺外T/NT值均大于1.2，而完整的ND-1完成同样的积聚则需要20-24小时。

Department of Radiobiology, School of Public Health, Jilin University,MH Radiobiology Research Unit,Changchun 130021, China

吉林大学公共卫生学院放射生物学教研室卫生部放射生物学重点实验室，吉林长春 130021

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。