Figure 6From: Free radical scavenging and formation by multi-walled carbon nanotubes in cell free conditions and in human bronchial epithelial cellsESR spectra in cell-free settings of control (medium with BSA), 1Â mg/mL asbestos, glass wool, MWCNT LNL1 , MWCNT LNL2 , MWCNT LT , MWCNT SNP , MWCNT SP and carbon black in medium with BSA. Spectra are shown at identical intensity scale.Back to article page