Question

describe principle of food preservation by canning​

Answer 1

Explanation:

Without microbes the food materials remain fresh for a long time. Canning: Food materials like fruits, vegetables, fishes etc. are boiled in sugar syrup or canning salt solution and are packed inside a can. Then the can is boiled in water bath or pressure canning is done for sterilization.

Answer 2

Answer:

Canning is the process of applying heat to food that's sealed in a jar in order to destroy any microorganisms that can cause food spoilage. Proper canning techniques stop this spoilage by heating the food for a specific period of time and killing these unwanted microorganisms.