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Minimum biofilm inhibition (a), biofilm metabolic activity (b) of purified active fraction of H. rosa-sinensis essential oil. The inset Fig. 1a indicates, the presence and absence of biofilm rigidity before (a) and after (b) treatment of essential oil. Inset Fig. 2 indicates the decreased viability of K. pneumoniae cells at increasing essential oil treatment in MHA plates (a, b, c).
