Figure 1.

Proximity of secondary cell wall polysaccharides to water. A comparison of the water-edited ¹³C NMR spectrum of never-dried pine for two different diffusion times, 4 ms (blue) and 100 ms (red), together with a standard ¹³C CP-MAS NMR spectrum (green). The water-edited 4 ms spectrum have been multiplied by four to allow comparison. The polysaccharides that have a relatively enhanced signal at the short (4 ms) diffusion time are the components of the secondary cell wall that are closest to water. Spectra were recorded at a ¹³C Larmor frequency of 125.8 MHz and a MAS frequency of 10 kHz.