Figure 4.
The threshold of electric field strength for the inactivation of P. aeruginosa and Staphylococcus epidermidis by PEF and antibiotics mix. The values of Ec for a specific dose of the antibiotic mix are shown in dots on the electric field curve that starts from the center of the concentric system. r is distance from the central point. PEF parameters: pulse duration = 60 μs; interval between pulses = 350 ms; number of pulses = 200. For each point, N = 48 for P. aeruginosa and 36 for S. epidermidis.