文档介绍：医学微生物学实验第一课件网网站 外界因素对细菌的影响与细菌的变异 (高压、干烤),紫外线杀菌作用(操作) ,空气细菌培养(每室一套) (操作,抗生素对细菌作用及耐药变异) ,变形杆菌的迁徙现象及对照 (每组一个,下次实验用) Methods for control of anisms Physical methods Heat Hot-air sterilizer Hot-air sterilizer Autoclaving Autoclaving Radiation Filtration Ultrasound Dryness Low temperature Chemical agents Hot-air sterilizer Hot-air sterilizer – 55-60 ? C for 30-60min – 160-170 ? C for 2 hours----spores – Glass petri dishes and pipettes Autoclaving Autoclaving – 15 pounds( 2 ), 121 ? C for 15-20min Ultraviolet, UV Ultraviolet, UV – 250-260nm – Quite lethal but does not rate glass, dirt films, water, and other substances very effectively. – To sterilize the air and any exposed surfaces – Can burn the skin and damage eyes 第一课件网网站精对皮肤的消毒作用,空气细菌培养(每室一套) 消毒前消毒前消毒后消毒后第一课件网网站