The new packaging will allow for a second to identify spoiled food
How to determine the quality of the product? In color? The smell? Of course, but many pathogens, breaking the quality of the product does not always cause noticeable changes to the naked eye. In this case, help is only a laboratory examination. Or a special film, which will give you a second to understand: before you clean the product or one from which it would be better to get rid.
is responsible for the development team of scientists from McMaster University in Canada. Their film is seemingly transparent and does not differ from the usual packaging film for foods. But in contact with food contaminated with E. coli, food bacteria and other pathogens, the film changes its color. The test is fairly simple: you need to wrap food wrap and wait a few seconds. If the film changed color - the food is infected. Despite the seeming simplicity of the design, its creation took almost 15 years. How do things work? For "rapid diagnosis," the researchers used a microscopic inclusions DNA and bioreagents located on a flexible plastic film. When the composition comes into contact with the bacteria and their toxins - film molecules begin to glow. How to say the creators, it's really quite convenient and practical method.
"Normally, to determine the quality of the product, you need it to process, referred to the laboratory, or the cultivated part of the sample to find the presence of bacteria and toxins, as well as to carry out another bunch of lab tests. Our goal is to avoid all this. You can get information about the product here and now: just look at the packaging and to understand - suitable food to eat or not. And what she's infected in the case of unfitness - is not so important in the long run. "