sterilisation with physical and chemical agents in bacteria
Answers
Answer:
Liquid- chemical method of sterilization involves the application of liquid to destroy the microbes permanently. – Alcohols– usually, 70% of alcohols are used as a chemical to kill bacteria. ... Heavy metals such as copper sulfate, mercuric salts, silver nitrate, mercuric chloride are used in the sterilization method.
Sterilization can be done by physical methods like hot-air sterilization and direct flame. Chemical methods like phenol and isopropyl alcohol.
Explanation:
Sterilization is a process to remove unwanted harmful microorganisms to prevent contamination. There are many different methods of sterilization
1. Physical Methods:
a) Direct flame: Used to sterilise inoculating loops or needles.
b) Steam Sterilization: Steam sterilization- Autoclave. This is used to sterilize media and glassware.
c) Dry heating: Hot Air Oven is used to sterilize glassware.
2. Chemical Methods:
a) Alcohols: Ethanol and isopropyl are used as a surface-disinfectant.
b) Hypochlorite: are chlorine releasing compounds. This is also used as a surface disinfectant.
c) Phenols: Phenolic compounds are used as a surface-disinfectant.