Analyse the Various Methods used for the Preservation of Food

We often store nourishment so that we can sap it later. However if feed is kept for a long father before it is eaten, it may start to go off. This may be beca character it is attacked by its own enzymes, oxidized by the vent or decomposed by bacteria and fungi. Therefore sustenance economy is very important. There ar three primary(prenominal) systems of preserving diet. These argon pasteurisation and sterilization, refrigeration and freezing and drying. Heating foods and drinks that are sealed in tins or cartons, kills off organisms like bacteria. This march is called sterilization or pasteurization. For example, milk is heat to 72 ºC for fifteen insurgents and past cooled rapidly. However this does not sterilize the milk. sterilization occurs when milk is heated nether pressure to 132]C for one second and sealed in cartons or plastic bottles. The second method is refrigeration and freezing, that is, modify the food or drink by placing it in the refrigerator. T his process slows down the activity of any enzymes bow in the food and it also stops the growth and counter of bacteria in the food. The third method is drying, that is, the preservation of food by removing the water in them. This process stops the enzymes from workings and prevents the growth of bacteria and fungi. The food is usually dried under low sort pressure. This makes the water evaporates without raising the the temperature at which the food would start to cook. The preserve food is then sealed in packets and kept at room temperature until it is reconstituted by adding water. For example, milk is dried, to make up milk powder. Then, by adding water makes them ready to drink. There are many other methods use for preserving food, for example, canning, salting, syrup, pickling and irradiation. If you want to get a full essay, order it on our website: OrderEssay.net

If you want to ge t a full information about our service, visi! t our page: write my essay