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Scanning electron microscopy images for phlorotannins-exposed (50 µg/mL) coupons after 24, 48 and 72 h of incubation. E. coli O154:H10 untreated controls (A) and phlorotannin-exposed (B), and E. coli O113:H21 untreated controls (C) and phlorotannin-exposed (D). Bar = 20 µm.
