Effect of cold plasma on açai pulp: Enzymatic activity, color and bioaccessibility of phenolic compounds

This study evaluates atmospheric cold plasma (ACP) effects on deteriorative enzymes, color, and phenolic compounds in açai pulp. The bioaccessibility of the bioactive compounds was also assessed after simulated digestion. Nine different treatments were applied, varying the excitation frequency (50, 500, 750 Hz) and processing time (5, 10, 15 min). ACP processing at low frequencies (50 Hz/15 min) was more effective in inactivating polyphenol oxidase (82.4%) and peroxidase (42.3%) (p