Figure 5

ESR spectra in cell-free settings by 1 mg/ml a) MWCNT _LNL1 and b) MWCNT _LNL2 in buffer, buffer with BSA, medium and medium with BSA. The unique peak has a g-value of 2.025 and half-width of 1.7 mT. c) Intensity of cell-free unique radical formation by MWCNT_LNL1 and MWCNT_LNL2 in buffer, buffer with BSA, medium, and medium with BSA. Columns represent the peak surface, i.e. area under curve (AUC), obtained by double integration of the unique peak (±SD). Statistically significant differences are indicated by an asterisk (P < 0.05). d) ESR spectra by MWCNT_LNL1 in cell-free settings (in buffer with BSA) with and without DMPO and/or H₂O₂, and with the iron chelator deferoxamine (DFO). Spectra are shown at identical intensity scale.