“Smart” sticker will indicate spoiled food

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we All used to trust (or not trust) labels on food products indicating the expiration date. But unscrupulous sellers are finding ways around this system in order not to lose benefits and to sell to the buyer outstanding product. Perhaps to avoid this problem in the future will help the invention of American chemists from the University of Clarkson. They have developed a new type of simple tests that can detect spoiled or contaminated with bacteria food products and cosmetics.

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