Food gas, often referred to as modified atmosphere packaging (MAP) or food-grade gas, consists of high-purity gases used to extend the shelf life of food, maintain freshness, and protect products during transport. Unlike industrial gases, food-grade versions must meet strict regulatory standards for purity to ensure they don't introduce contaminants into the food supply.
The pioneers of food gas developed the foundation for modern preservation through four key milestones:1767 (Joseph Priestley): Invented artificial carbonation by infusing water with $CO_2$.1821 (Jacques Étienne Bérard): Proved that lowering oxygen levels delays fruit ripening.1927 (Kidd & West): Conducted the first rigorous scientific studies on controlled atmosphere storage for produce.1930s (Killefer et al.): Demonstrated that high $CO_2$ concentrations could effectively double the shelf life of fresh meat.
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