Salting (food)

Salting is the preservation of food with dry edible salt. It is related to pickling in general and more specifically to brining also known as fermenting (preparing food with brine, that is, salty water) and is one form of curing. It is one of the oldest methods of preserving food, and two historically significant salt-cured foods are salted fish (usually dried and salted cod or salted herring) and salt-cured meat (such as bacon). Vegetables such as runner beans and cabbage are also often preserved in this manner. Salting is used because most bacteria, fungi and other potentially pathogenic organisms cannot survive in a highly salty environment, due to the hypertonic nature of salt. Any living cell in such an environment will become dehydrated through osmosis and die or become temporarily inactivated. Fine grained salts were more expensive but also absorbed moisture faster than coarse salt. Salting could be combined with smoking to produce bacon in peasant homes. Instructions for preserving (salting) freshly killed venison in the 14th century involved covering the animal with bracken as soon as possible and carrying it to a place where it could be butchered, boiled in brine, and dry salted for long term preservation in a barrel. People in the 14th century could also put salt on vegetables for taste. Salted meat was a staple of the mariner's diet in the Age of Sail. It was stored in barrels, and often had to last for months at sea. The basic Royal Navy diet consisted of salted beef, salted pork, ship's biscuit, and oatmeal, supplemented with smaller quantities of peas, cheese and butter. Even in 1938, Eric Newby found the diet on the tall ship Moshulu to consist almost entirely of salted meat. Moshulu's lack of refrigeration left little choice as the ship made voyages which could exceed 100 days passage between ports. It was discovered in the 19th century that salt mixed with nitrates (such as saltpeter) would color meats red, rather than grey, and consumers at that time then strongly preferred the red-colored meat.

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Brining

In food processing, brining is treating food with brine or coarse salt which preserves and seasons the food while enhancing tenderness and flavor with additions such as herbs, spices, sugar, caramel or vinegar. Meat and fish are typically brined for less than twenty-four hours while vegetables, cheeses and fruit are brined in a much longer process known as pickling. Brining is similar to marination, except that a marinade usually includes a significant amount of acid, such as vinegar or citrus juice.

Curing (food preservation)

Curing is any of various food preservation and flavoring processes of foods such as meat, fish and vegetables, by the addition of salt, with the aim of drawing moisture out of the food by the process of osmosis. Because curing increases the solute concentration in the food and hence decreases its water potential, the food becomes inhospitable for the microbe growth that causes food spoilage. Curing can be traced back to antiquity, and was the primary method of preserving meat and fish until the late 19th century.

Food preservation

Food preservation includes processes that make food more resistant to microorganism growth and slow the oxidation of fats. This slows down the decomposition and rancidification process. Food preservation may also include processes that inhibit visual deterioration, such as the enzymatic browning reaction in apples after they are cut during food preparation. By preserving food, food waste can be reduced, which is an important way to decrease production costs and increase the efficiency of food systems, improve food security and nutrition and contribute towards environmental sustainability.

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