Question

Explain 4 {Four} methods of food Preservation​

Answer 1

Answer:

a ) Drying

b ) Preservation using salt and sugar

c ) Preservation using acetic acid

e ) Heat and cold treatment

f ) Canning

g ) Freezing

Hope this will help you

Answer 2

1. Pickling: Food preserved in vinegar. Preserves meat, vegetable due to the action of Acetic Acid which prevent microbial growth.
2. Salting: Food preserved in Salt such as fish or meat.
3. Smoking: Smoking of fish and meat prevent spoilage by dehydration. The wood smoke contains large number of compounds which are antimicrobials and slow rancifidication of animal fats.
4. Canning: It is a method of preserving food in which the food contents are processed and sealed in an airtight container at high temperature. Food products such as meat, fish, fruits, vegetables. Nicholas Appert-father of canning.
5. Bottling: It is a method of preserving food in which the food contents are processed and shield in airtight container at high temperature. Liquid foods like milk, wine, etc.
6. Pasteurization: It is a process of heating milk below boiling point to kill pathogenic bacteria to make the food safe to eat. Stops fermentation. Named pasteur introduced the technique.
7. Refrigeration: Keeping food at low temperature or cold temperature. Remain unspoiled in refrigerator @ 4°C. Freezer temperature should be –18°C. Deep freezers @ –60°C are good for storing meat and fish.
8. Sterilization: To remove microbes from food. Milk sterilized by boiling at 100°C.
9. Dehydration: The process of removal of water from food. Simplest and cheapest method. Prevent microbial growth due to lack of water. Fish, fruits, etc. can be stored.