Methods of sterilization:
(1) Physical method:
a) Dry heat sterilization: It includes flaming technique, hot air oven method and sterilization by I.R radiations.
b) Moist heat sterilization - It includes autoclaving, tyndalization and pasteurization.
c) Radiation sterilization - By UV and gamma radiations.
(2) Chemical methods: Chemical methods of sterilization includes sterilization by heating with bactericides and gaseous sterilization.
(3) Mechanical methods: In this process sterilization is done by filtration with bacteria proof filters. These are ceramic filters, seitz filter, sintered glass filters, sintered metal filters, and membrane filters