"Smart" sticker will indicate spoiled food
Source:
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.
About the results of their work, the scientists said in 254th National Congress and exposition of the American chemical society in Washington, the journal Science published details of the development. The main goal of scientists was to create a simple way to test foods to recognize signs that they are not edible. The experts relied on already well-known laboratory methods. As the author of the study Silvan Andreescu
"the Majority of scientists working on similar sensors that use solutions, which move through the channels. We use sustainable inorganic particles exhibiting redox activity. When they interact with substances that we want to see, they change color, and the concentration of the substance depends on how much of this change".
Ready «smart» the stickers represent the piece of paper the size of a postage stamp. On these small test systems caused special substances called indicators that indicate the presence in the analyzed object of a substance. Upon contact with the compounds, indicating that the product is unfit for human consumption, the indicators change color. Now a new test-system can detect ergotoxin And is an extremely toxic substance produced by fungi during the destruction mold of many food products.
But that's not all. As stated by scientists, their development can be used for determining the place of production of tea or wine to a unique composition of antioxidants. And in the future, experts plan to expand the functionality of their tests: they want to add the ability to detect Salmonella, E. coli and other dangerous infectious agents.
Http://youtu.be/weR_GqGxkOY
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