Multifunctional pH-responsive chitosan-based films incorporating <i>Phyllanthus emblica</i> L. polysaccharides and black rice anthocyanins for perishable food quality maintenance and intelligent freshness monitoring.

The system detection results indicate that the G/R value of the proposed film shows an increasing trend, clearly demonstrating that the film is feasible for indicating shrimp rot.

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The tensile properties of the films showed a substantial increase with the addition of BRA and a decreasing trend with the addition of PEP.

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