DEHYDRATION (CAN BE TRIED @ HOME) Many foods are dehydrated to preserve them. While walking through a grocery store/ super market you can notice the following dehydrated products:
Since most bacteria die or become completely inactive when dried, dried foods kept in air-tight containers can last quite a long time. Normally drying completely alters the taste and texture of the food, but in many cases (such as raisins) a completely new food is created that is just as good as the original. In India commonest example of drying is making Papads, drying cauliflowers, bhendi, gawar etc during season.
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