modified-atmosphere
Referring to packaging where the internal gas composition is altered to extend shelf life.
Usually involves replacing the normal air inside a package with a specific blend of nitrogen, carbon dioxide, and oxygen to slow down bacterial growth and food respiration.
Word relationships
- gas-flushed: Gas-flushed is a practical term describing the action of blowing gas into a package, while modified-atmosphere is the formal scientific term for the resulting state.
Commonly confused with
- controlled-atmosphere: Controlled-atmosphere systems actively monitor and adjust gas levels continuously, whereas modified-atmosphere systems seal a specific gas mix inside a package once.
Collocations
- modified-atmosphere packaging
- modified-atmosphere storage
- modified-atmosphere technology
Example sentences
- "Modified-atmosphere packaging extends the shelf life of fresh produce by reducing the oxygen level to slow down the ripening process." Agricultural science review
Memory hook
Think of 'Modifying' the 'Atmosphere' (the air) inside the bag to make a cozy, oxygen-free bedroom where bacteria can't wake up. Modify the atmosphere, and bacteria disappear.
When not to use
Do not confuse with 'controlled-atmosphere', which involves continuous monitoring and adjustment of gases (like in large storage warehouses) rather than a one-time seal.
Fun facts
- Red meat is often packed with a high-oxygen modified atmosphere (around 80% oxygen) not to preserve it, but to keep the myoglobin protein in the meat bright red, which consumers associate with freshness.
Related words
Explore more words
shelf-stable, preservative, spoilage, oxidize, cure, carbonate
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