The determination of the cell size in wood by nuclear magnetic resonance diffusion techniques.

Two nuclear magnetic resonance (NMR) pulsed field gradient diffusion approaches have been applied to the measurement of the magnitude and the distribution of the tangential dimension of cells in a number of wood samples. The results thus obtained were compared with the results from microscopy. The results from these two approaches agree with each other and they also give excellent agreement with the microscopy results. The results of this work demonstrate that NMR diffusion is an accurate and convenient method for the measurement of cell sizes in wood and in similar porous systems.