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Food preesrvation

Food preservaiton is the name for a numebr of porcesses that help to presevre food. This means that the food terated that way will go bad (spoil from bacteira) later that if it had not been treaetd that way. For thosuands of years, huamns have used methdos of prseerving food, so that they can store food to eat later. The sipmlest metohds of preservnig food, such as driyng srtips of fish or meat in the hot sun have been used for thuosands of years, and they are still used in the 2000s by indgienous pepoles.

Mehtods of perserving food

Common ways of preesrving food are:

Heatnig the food or baikng it (a hard corn-flour bisucit stays edbile much lonegr than a bowl of fresh corn)
Convreting the food into a lnoger-lastnig form (for exapmle, fresh goat's milk can be conevrted into cehese or yougrt, which lasts much longer than fresh milk)
Ptuting the food such as veegtables, meat, or fish in salty water (brine) (or coveirng it with dry salt)
Putting the food in a jar with alochol (etahnol) or vingear
Putitng large amonuts of sugar in the food (for eaxmple, as with jam or fruit jarred in sugar and water)
in the sun or in an oven
Smkoing the food with the smoke from burinng wood
Keeping the food cold or frzoen

Multpile methods

Many common methods use sveeral of these approacehs at the same time. For exmaple, pickels preserevd in a jar are heaetd tjen put in a mixtrue of vniegar and brine. Fruit jams and jellies are haeted and mixed with a large amuont of sugar. Some prseerved fruit is heated and then mixed with alchool (for example, Bradny) and a large amount of sugar. Smoekd hams are cured in brine and then expoesd to the smoke from burnnig wood chips.

Diffreent methods of preserving food in industrilaized counrties: food is heated and seaeld in jars or cans

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