1.生物学的发展和人类生活水平的提高 2.未来的生物学展望 3.科学是双刃剑:生物学面临的挑战

一、植物转基因技术 将优良性状的目的基因导入植物细胞或组织,并在 其中进行表达,从而使植物获得新的性状

Human error, poor laboratory techniques and misuse of equipment cause the majority of laboratory injuries and work-related infections. This chapter provides a compendium of technical methods that are designed to avoid or minimize the most commonly reported problems of this nature

The Laboratory biosafety manual has in the past focused on traditional biosafety guidance for laboratories. The manual emphasizes the use of good microbiological work practices, appropriate containment equipment, proper facility design, operation and maintenance, and administrative considerations to minimize the risk of worker injury or illness. In following these recommendations, the risk to the environment and surrounding community-at-large is also minimized

Chapter 6. Laboratory animal facilities Those who use animals for experimental and diagnostic purposes have a moral obligation to take every care to avoid causing them unnecessary pain or suffering. The animals must be provided with comfortable, hygienic housing and adequate wholesome food and water At the end of the experiment they must be dealt with in a humane manner

The employing authority, through the la boratory director, is responsible for ensuring that there is adequate surveillance of the health of laboratory personnel. The objective of such surveillance is to monitor for occupationally acquired diseases Appropriate activities to achieve these objectives are:

Brucellosis is an infectious disease caused by the bacteria of the genus Brucella These bacteria are primarily passed among animals, and they cause disease in many different vertebrates Various Brucella species affect sheep, goats, cattle, deer, elk, pigs, dogs, and several other animals Humans become infected by coming in contact witl animals or animal products that are contaminated with these bacteria

本章主要知识点: 一、电子计算机的诞生和发展 二、电子计算机的特点、用途和分类☆ 三、电子计算机系统的组成及工作原理☆ 四、微型计算机简介 五、计算机中信息的表示 六、计算机安全与计算机维护 七、多媒体计算机

在前面的章节中,研究了许多基于web的应用程序的安全技术。这些技术都是用于处理 Internet上的安全问题。在网上,一些用户能够很容易地访问和操纵数据,而不需要任何事先 的验证。这些安全系统通过对非授权用户隐藏信息和在公用网上(如 Internet)建立虚拟的专 用网来工作。 然而,对访问数据的限制只是整个问题的一部分

第二章环境问题与环境污染 第一节人类面临的环境问题 环境问题是指由于自然或人类活动使环境质量发生变化,从而带来不利于人类生产、生活和 健康的结果,其重要特点就是从局部地区的环境污染向全球性环境问题发展。当前人类面临的环 境问题很多,很难区分哪些是最重要的。本章把主要的环境问题划分为全球(大气)环境问题, 生态环境问题及社会环境问题三部分分别进行介绍