Fig. 12
From: The surface chemical constituent analysis of poplar fibrosis veneers during heat treatment
50 MHz 13C CPMAS high-resolution solid-state NMR spectra of raw and heat-treated samples of poplar wood. A untreated fibrosis veneers (dried at 60 °C), B heat-treated fibrosis veneer (160 °C/0.3 MPa), C heat-treated fibrosis veneer (180 °C/0.3 MPa). In spectrum A, the peaks are numbered from 1 to 16 and the corresponding assignment can be found in Table 3