Science, asked by prasana1, 1 year ago

write any four methods of food preservation

Answers

Answered by Aryan11578
114
(a) Adding salt to the food.
(b) Adding vinegar to the food.
(c) Freezing.
(d) Adding sugar to the food

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Answered by Sneha259
49
Food preservationis known “as the science which deals with the process of prevention of decay or spoilage of food thus allowing it to be stored in a fit condition for future use”. Preservation ensures that the quality, edibility and the nutritive value of the food remains intact.Preservationinvolves preventing the growth ofbacteria, fungi and other microorganisms as well as retarding oxidation of fats to reduce rancidity. The process also ensures that there is no discolouration or aging. Preservation also involves sealing to prevent re-entry of microbes. Basically food preservation ensures that food remains in a state where it is

*.not contaminated by pathogenic organisms or chemicals
*.does not lose optimum qualities of colour, texture, flavor and nutritive value

Dryingis the oldest method of food preservation. This method reduces water activity which prevents bacterial growth. Dryingreduces weight so foods can be carried easily. Sun and wind are both used for drying as well as modern applications like Bed dryers, Fluidized bed dryers, Freeze Drying, Shelf dryers, Spray drying and Commercial food dehydrators and Householdoven. Meat and fruits like apples,apricots and grapes are some examples of drying with this method.

Freezingis keeping prepared food stuffs in cold storages. Potatoes can be stored in dark rooms but potato preparations need to be frozen.

Smokingis the process that cooks, flavours and preserves food exposing it to the smoke from burning wood. Smoke is antimicrobial and antioxidant andmost often meats and fish are smoked. Various methods of smoking are used like Hot smoking, Cold smoking, Smoke roasting and Smoke baking. Smoking as a preservative enhances the risk of cancer.

Salting and Pickling:Salting also known as curing removes moisture from foods like meat. Pickling means preserving food in brine (salt solution) or marinating in vinegar (acetic acid) and in Asia, oil is used to preserve foods. Salt kills and inhibits growth of microorganisms at 20% of concentration. There are various methods of pickling like chemicalpickling and fermentation pickling. In commercial pickles sodium benzoate or EDTA is added to increase shelf life.

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