3.3.4. Solid-state13C NMRSolid-state13C NMR is one of the promising analytical meth-ods that can be applied for the study of cellulose crystal structureand morphology (Idström et al., 2013). The13C NMR spectra ofGS, BGS and CNC-GS are presented in Fig. 7. The six carbon atomsthat are assigned to the cellulose molecule dominate the spectrum.Starting on the up field side of the spectrum, the two peaks at63.4 and 65.4 ppm were assigned to C-6 of cellulose (65.4 ppm,crystalline cellulose, 63.4 ppm, amorphous cellulose). The clus-ter of resonances from 72.5 to 74.8 ppm represents C-2, C-3, andC