Question

what is food preservation?describe in detail any four common method of food preservation.

Answer 1

Definations:- Food preservation is the techniques to prevent food spoilage, food poisoning, food infection and preventing microbial contamination in the food. 
Objectives:-  To prevent and to remove microbial contamination. To inhibit microbial growth.  To kill contaminating pathogens. To minimize food spoilage, food infection and food poisoning.

Methods of Food Preservation:-

  1. Pickling:-
•  Food preserved in vinegar.
•  Preserves meat, vegetables due to the action of acetic acid which prevents microbial growth.

  2.Salting
•  Food preserved in salt such as fish, meat.
•  Salt prevent microbial growth.

3.Refrigeration
•  Keeping food at low temperatures or cold.

4.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.

Answer 2

Explanation:

Methods of Food Preservation

1. Pickling

• Food preserved in vinegar.

• Preserves meat, vegetables due to the action of acetic acid which prevents microbial growth

2. Salting

• Food preserved in salt such as fish, meat

• Salt prevent microbial growth

3. Smoking

• Smoking of fish and meat prevent spoilage by dehydration

• The wood smoke contains large number of compounds, which are anti microbial and slow rancidification 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.

• Nicholas Appert-father of canning

• Food products such as meat, fish, fruits, vegetables