Determining the highly anisotropic cell structures of Pinus sylvestris in three orthogonal directions by PGSTE NMR of absorbed water and methane.

The walls of solid matrix restrict the self-diffusion of a fluid absorbed in the matrix, and this is reflected in the echo amplitudes measured by PGSTE NMR. Hence, the pore size distribution of the matrix can be extracted from the echo amplitudes. We demonstrate that, when both liquids and gases (water and methane in this case) are used as probe fluids, the… (More)