为了保证食品安全,使消费者不误食变质食品,科学家研究出能指示食品是否变质以及能延长食品保鲜期的包装技术,统称为“活性包装技术”或“智能包装技术”。食品包装研究人员发现,有些材料可以吸收包装袋中的氧气;有些材料会与食物变质时产生的气体相互作用改变颜色;有些材料在? In order to ensure food safety and prevent consumers from eating deteriorated food, scientists have researched packaging technologies that can indicate whether the food is spoiled or not and which can prolong the shelf life of the food, collectively referred to as “active packaging technology” or “smart packaging technology.” Researchers at food packaging found that some materials absorb oxygen in the bags; some interact with the gases produced when food spoils and change color;