Figure 2. 1H HR-MAS NMR spectra of ancient samples A1 (red line), B1 (brown line) and A3 (dark green line) (panel A); modern samples: not aged P2 (black line), and artificially aged P2C9024 (grey line) and P2C9048 (light green line) (Panel B); cellobiose dissolved in D2O (dark blue line at the bottom of both panels).
