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The zone of inhibition for methanol extracts of Hypnea valentiae activity against (a) E. coli, (b) E. faecalis, (c) P. aeruginosa, and (d) S. aureus. 1—methanol, 2—antibiotic streptomycin, 3—methanol extract 10 mg/mL, 4—methanol extract 20 mg/mL, and 5—methanol extract 40 mg/mL.
