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Fig. 8 | Particle and Fibre Toxicology

Fig. 8

From: Early signs of multi-walled carbon nanotbues degradation in macrophages, via an intracellular pH-dependent biological mechanism; importance of length and functionalization

Fig. 8

Raman spectroscopy analysis of CNT incubated in media presenting various acidity. Panel a ID/IG ratio calculated from Raman spectra of S-, SF-, L-, or LF-CNT incubated for 48 h in culture medium in presence or absence of Concanamycin A. Panel b ID/IG ratio calculated from Raman spectra of S-, SF-, L-, or LF-CNT incubated for 48 h in the supernatant of cells cultured in presence or absence of Concanamycin A. Panel c ID/IG ratio calculated from Raman spectra of S-, SF-, L-, or LF-CNT incubated for 48 h in artificial medium which pH was set-up at 7.2, 6, or 4.5. Panel d ID/IG ratio calculated from Raman spectra of S-, SF-, L-, or LF-CNT incubated for 48 h in culture medium in presence or absence of H2O2. Abbreviations as in Fig. 1. Data are given as mean ± SEM of minimum 5 values

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