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 scale of the dimensions observable by PGSTE NMR may be over 4 orders of magnitude. This enables determining the dimensions of highly anisotropic pores. In the present case, the wood cell structures of Pinus sylvestris in three orthogonal directions were studied.
Kekkonen
Päivi M
PM
Department of Physical Sciences, P.O.Box 3000, 90014 University of Oulu, Finland.
Telkki
Ville-Veikko
VV
Jokisaari
Jukka
J