free oxygen plays a major role in affecting the food quality. when food browns, the components of food intersections with oxygen, which is commonly known as oxidized. this process is somewhat similar to what happens with the iron when it rusts. oxygen is required for the survival of yeast, molds, and aerobic bacteria. it wreaks their damage. there is no need to worry about the canned foods, which is vacuum packed and properly heat. however, even a minor mistake in heating or vacuum procedure may affect the food quality. even if, sterile product is packed in the sterile container with the help of vacuum technology, if the heat treatment is not properly done, it will contain a small amount of air. even a small amount of air left inside will contain oxygen in it. insufficient heat may not be able to kill the spores, which may affect the quality of packed food. vacuum bags can be purchased online or via tv advertisements. it will cost around 100. a handled pump can be used to suck up air from the special vacuum canisters and plastic freezer bags. heat sealing the bag is advisable after evacuating the air form packaging. these things help to maintain the freshness of foods. it is possible to maintain the crispiness of food items like chips and fries, by following these practices. it is possible to preserve lettuce for weeks, tostitos for infinite time and cheese for months in evacuated bags. removing and replacing the oxygen with an inert gas is the most efficient way to constrain oxygen damage. the cello packs of potato and corn chips, which display their contents of greasy and salt calories effectively on supermarkets&rsquo shelves, are inflated with nitrogen gas. the flame will go out if a small hole is punched and the gas inside is squeezed onto a burning match. the gains and dry goods can store for years in a plastic bags, which is filled with nitrogen and sealed in metal cans or plastic tubes. medical gas suppliers supplies food quality nitrogen and empty containers. somewhat similar to propane tanks, it comes in pressure bottles. it will require renting or buying a nitrogen pressure regulator, to keep a gas at a low pressure. source of information httpwww.motherearthnews.comrealfoodvacuumpackingfoodsnitrogenzmaz99aszsto.a…
