Question

Explain method of food preservation?

Answer 1

Answer:

1.store food in air tight container

2.keep food in refrigerator

Answer 2

Following are the methods of food preservation:

• Drying
• Preservation using sugar and salt
• Preservation using acetic acid
• Preservation using chemical preservations
• Heat and cold treatments
• Pasteurisation
• Vacuum packing
• Canning
• Freezing

EXPLANATION

• Drying: This method reduces water content sufficiently and, thereby, prevents, or delays, bacterial growth.
• Preservation using salt and sugar: Sugar and salt reduce the water content and make it unavailable for growth of microorganisms.
• Preservation using acetic acid: Acetic acid, in the form of vinegar, is used in manufacturing of several pickled products.
• Preservation using chemical preservation: Chemical preservation, like sodium benzoate and pottasium metabisulfite are used to preserve Jams, jellies and pickles. These Chemicals inhibit the growth microorganisms.
• Heat and cold treatment: Some food, like milk, are usually boiled before their use, or storage. Boiling kill many microorganisms.
• Pasterurisation: Pasterurisation is pressurised heating for a short time; it may be considered as a mild form of heat treatment.
• Vacuum packing: Vacuum packing stores food in a vacuum environment usually an air-tight bag or bottle.
• Canning: it involves cooking food and sealing it in sterile cans or jar; this is followed by boiling the containers to kill or weaken any bacteria.
• Freezing: When foods are kept at below freezing temperatures, most Chemical changes take place at such a reduced rate that only minor changes are noticeable even after long periods of storage.

Hope it will help you ✌️ ✌️