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Scanning electron microscopy images of grass carp during exposure to different decontamination methods (a) fresh fillets (b) 5 min immersion in PFB generated at 70 V (c) 15 min ultrasound treatment followed by 5 min immersion in PFB generated at 70 V (d) 15 min ultrasound treatment at 60 ℃ (thermoultrasound) followed by 5 min immersion in PFB generated at 70 V.
