Figure 5: Changes amplitudes (A) and linewidths (ΔBpp) of EPR spectra, and free radicals concentrations (N) in streptomycin (a), gentamicin (b), neomycin (c), sisomicin (d), paromomycin (e), and tobramycin (f), sterilized at 160°C (120 minutes), 170°C (60 minutes), and 180°C (30 minutes) with storage time after sterilization. The data for the EPR spectra measured with microwave power of 2.2 mW at room temperature.