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Effect of root barks dichloromethane (RBDCM) extract in biofilm formation by Pseudomonas aeruginosa PAO1. After 24 h of static incubation, biofilm biomass was quantified by using crystal violet staining. RBDCM extract was tested at 100 μg/ml. Dimethyl sulfoxide (1% [vol/vol], fi nal concentration) was used as solvent control and naringenin (Nar: 4 mM, final concentration) as quorum sensing inhibitory control. *Signifi cance at P < 0.05. All experiments were performed in six replicates
