Applied Physics and Mathematics Annotation << Back TWO-DIMENSIONAL DISTRIBUTION FUNCTION OF DIFFUSION IN WOOD OBTAINED USING 2D LAPLACE INVERSION V.V. RODIN, P. MCDONALD, M. JONES The aim of this work was to use 2-dimensional pulsed field gradient (PFG) NMR-spectroscopy to explore the anisotropic diffusion of water in wood. Simulations based on the theory of 2D diffusion-diffusion correlations with following application of Inverse Laplace transformation (ILT) have been carried out for orthogonal and collinear pairs of gradients with parameters of 2D experiment on wood. The results showed how these are reflected in 2D (D1, D2) ILT maps for different ratios D1/D2 in two orthogonal directions. When two pairs of gradients were applied orthogonally in 2D experiment on wood the features of diffusion anisotropy appeared as off-diagonal “wings” in 2D diffusion map whereas in the experiment with two collinear pairs of gradients anisotropic diffusion of water in wood cells has been observed as two diagonal peaks in 2D map. Keywords: NMR PFG, water, wood, anisotropy, ILT Contacts: E-mail: victor.rodin@jku.at Pp. 03-07.