Carbon-13 NMR chemical-shift imaging study of dewatering of green sapwood by cycling carbon dioxide between the supercritical fluid and gas phases

- Partly dewatered sapwood was immersed in supercritical carbon dioxide.
- Carbon-13 chemical-shift imaging mapped the distribution of carbon dioxide.
- Carbon dioxide concentrations were relatively high in latewood bands.
- Sap-filled cell lumens in earlywood hindered penetration by carbon dioxide.