Figure 6

FE-SEM images of P. aeruginosa and E. coli biofilms treated with Chicory extract alone or combined with Ar-plasma at different exposure times: (a and g) Control, (b and h) Chicory extract, (c and i) 90 s Ar-plasma, (d and j) Chicory extract combined with 90 s Ar-plasma, (e and k) 180 s Ar-plasma, and (f and l) Chicory extract combined with 180 s Ar-plasma.