Here is a list of seven effective physical agents that can kill infection causing organisms:- 1. Electricity 2. Sonic and Supersonic Waves 3. Alpha, Beta, and Gamma Rays 4. Electrons 5. Cathode Rays 6. X Rays 7. Distilled Water. Physical Agent # 1. Electricity: Beattie and Lewis (1920) employed a current of about 4000 volts and 2 amp. for 4 [...]
Among the various methods followed for controlling microbial activity, the best by far is sterilization as it eliminates all the microbes. Sterilization is achieved by the following methods: 1. Physical Methods 2. Radiation Methods 3. Ultrasonic Methods 4. Chemical Methods. 1. Physical Methods: Physical methods of sterilization include killing of microbes by applying moist heat as in steaming or dry [...]
In this article we will discuss about:- 1. Meaning of Antimicrobial Action 2. Mechanisms of Antimicrobial Action 3. Effects on on Microbial Cells. Meaning of Antimicrobial Action: Microorganisms can be killed, eliminated or inhibited by a number of physical, chemical and other means. All these agents which act against the microbes are called ‘Antimicrobial agents'. Varieties of microorganisms differ greatly [...]