Fig. 5
From: Burial-induced deterioration in leather: a FTIR-ATR, DSC, TG/DTG, MHT and SEM study
The second derivative FTIR-ATR spectra in the (1700–1450) cm−1 region for a CH; b CC; c SC and d CaC, before and after soil burial tests. Figures in black reffer to collagen band's wavelengths, while figures in red reffer to tannin‘s bands wavelengths