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Argon and nitrogen are the main gases used in modified atmosphere packaging (MAP), and studies have demonstrated their efficacy in reducing microbial growth and improving the quality retention of fresh produce. 

Researchers have studied the effects of high-pressure argon and nitrogen on respiration rate, tissue browning and antioxidant power in fresh-cut pineapple. 

The authors hypothesized that the inhibitory effect of HP Ar and HP N treatment on respiration rate and ethylene production may be due to the gas hydrate formation and residual Ar to N2 in micropores of pineapple wedges, which could limit the activity of intracellular water and enzymes in the fruits, thus slowing down their metabolic processes. Another explanation ould be that the HP Ar and HP N treatments create anaerobic conditions, thus both respiration rate and ethylene production are reduced.

Read the study and its findings here.

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