In people's life consciousness, there are many foods add preservatives; it is bad for health, and even harmful. There are a lot of people eating at home by their own, so that the formation and the use of preservatives in the production of food are different at home and of the enterprises. The famous preservative sorbic acid potassium and sodium diacetate. Their own production is often done now to eat. Even some time after eating, but also to take responsibility, the thing of food poisoning is his magnanimous person. But businesses do business can not think so. Food safety responsibility to bear by businesses, businesses had to resort to "science". This antiseptic has been on the stage. The role of preservatives is to inhibit the reproduction of bacteria. In this factory, after circulation placed on the counter, and finally to the people's hands and mouth.
     Of course, as the additive of the "security" or to confirm. Acute toxicity, subacute toxicity, chronic toxicity and carcinogenic and so on, can check the check up. Acute toxicity of the examination is also interesting: the drug into the bait to a dozen mice (with the number and the size of the mouse) to eat. Increasing the concentration of the drug, which causes the death of half of the mice, is known as the half lethal dose. This is a macro validation. Microscopic verification can be confirmed by observing the effect of drugs on human cells. To consider the use of the results of the recognition of harmful bacteria, and harmless to human cells.
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