Smart Food Bags Come Out in Canada

A Canadian company has developed a smart food packaging bag. The food packaging bag consists of three separate layers. The inner layer is a porous layer, which is in direct contact with food. If the food is infected with certain bacteria that can cause disease, these bacteria can penetrate the porous layer and reach. The middle layer. The middle layer contains a nutrient gel that reacts with an antibody in the gel to change color. The bacteria then enters the outermost layer and interacts with another antibody on the surface, spreading out in an X shape, allowing the consumer to see it and knowing that the food has gone bad.
(Chai Wenhua)