It creates an acidic environment which many bacteria cannot tolerate.
Five ways: Pickling, Salting, Drying, Cooking or Radiation --------------------------------------------------------------------- If you want to DESTROY the bacteria rather then just prevent them form multiplying then there are just 3 of the above that will do it. Pickling, Cooking and Radiation. Salting and Drying (and to some extent smoking) do not kill the bacteria, they preserve food by creating an environment that prevents the bacteria from multiplying.
Five ways: Pickling, Salting, Drying, Cooking or Radiation --------------------------------------------------------------------- If you want to DESTROY the bacteria rather then just prevent them form multiplying then there are just 3 of the above that will do it. Pickling, Cooking and Radiation. Salting and Drying (and to some extent smoking) do not kill the bacteria, they preserve food by creating an environment that prevents the bacteria from multiplying.
It dependes on where the bacteria are growing. You can use antibiotics if they are in your body. If they are on food the refrigeration, salting and pickling. You could also limit the food source avalible.
Food is cooked to kill bacteria as it is canned; the cans then keep out any new bacteria.
Cooking food kills any bacteria already on the food (assuming it is heated sufficiently). If there is no bacteria on the food it takes longer to decay. If you do not finish the food you must refridgerate it to continue to stop spoiling because the cold also slows down the process.
Drying, Salting, Pickling, Fermenting, Smoking, Freezing, Cooling, Sugaring... Most methods involve taking water out of the food or inducing a concentration gradient to kill bacteria (by sucking water out of it). Others involve coating the food with some chemical that kills bacteria but is (relatively) safe for humans to consume.
Boil it.
It does both, but not completely.During fermentation of pickled vegetables, the bacteria (especially useful lactic bacteria) convert the sugars into lactic acid (and other organic acids) that kills some other bacteria, and stops others from reproducing. During pickling process usually are added some herbs and spices (such as mustrard seed or garlic) that have antimicrobial properties, and almost always is added salt, that also kills bacteria (very high levels of salt may even sterilize the pickled food, killing all the bacteria).In cool winter months, pickled vegetables last for several months without sterilization (if sterilization is needed, that is usually done by boiling, but ruins the quality of the vegetables).
pickling
Normally fruit essence is a food for bacteria. Acidic fruit, such as citrus, or vinegars, can kill some bacteria.
If the food is raw, then it must be kept cold- refrigeration will extend the shelf life from 3 to 5 days, depending on the type of food. Freeze it! this will extend it's edibility by several months. Cook it, refrigerate any unused food promptly. The goal is to cook to kill, or keep it as far below room temperature as possible- the breeding ground is room temp.
The pickling method is by submersing the food into a vinegar or saline solution. The reaction between the food and the vinegar or saline solution causes it to ferment. This process is done by putting the food into an anaerobic environment so that no bacteria can manifest itself on it.