Spoiled food 6.2.1 Spoiled food can be caused by changes in the microbes, chemistry, or physics. In which microbiological reasons, in many cases, is the main cause. Microorganisms grow while preserving the product can cause damage and can also infect humans use. So the calculation processing always designed to destroy many microorganisms as possible during processing. If the product is not sterile, the conditions for packaging and storage should also be carefully considered to limit the growth of microorganisms. 6.2.2 Differences of pasteurized and UHT Pasteurized and sterilized are identical heat treatment processes are typically applied in the processing of different products, but the purpose of the application as well as its impact on the product. Pasteurization is performed at temperatures below 100 degrees C. The main objective is to destroy pathogenic microorganisms to produce safe products. Besides, pasteurization also destroys a large part of spoilage microorganisms and as a result of the product shelf life is extended. Pasteurization does not completely destroy microorganisms, particularly bacteria spores. Therefore, the pasteurized food products are often stored in cold conditions. Sterilization is the process of heat treatment more powerful, destroying all living cells and microbial spores. For example, sterilization is used for the production of canned fish. Canned products have a long shelf life, can be more than 1 year, and does not need to be stored in cold conditions. However, because sterilization is heat treated at a high level should also cause nutrient loss and reduced quality more sense.
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