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Effect of PP nanocomposite films containing ZnO NPs/4A Z/GTE on the total volatile basic nitrogen of Salmon during storage at 4°C. Control sample: Polypropylene (PP); Treatment 1: PP/3% ZnO NPs/4A Z/GTE; Treatment 2: PP/6% ZnO NPs/4A Z/GTE. 4A Z: 4A zeolite; GTE: green tea extract
