Abstract
SHS investigation development is considered from the geographical and historical viewpoint. 3 stages are described. Within Stage 1 the work was carried out in the Department of the Institute of Chemical Physics in Chernogolovka where the scientific discovery had been made. At Stage 2 the interest to SHS arose in different cities and towns of the former USSR. Within Stage 3 SHS entered the international scene. Now SHS processes and products are being studied in more than 50 countries.
Abstract
In the technological treatment of wood materials, it is important to control water-wood interactions. To measure the water self-diffusion coefficients properly in wetting/drying processes of wood, it is necessary to understand many factors affecting the experiments. For fibrous material, the diffusivities of water could be different along the fiber and in the direction of perpendicular to fiber axis. The chapter presents the data of NMR relaxation and 1-dimensional PFG NMR in studying anisotropic diffusion of water in wood.
Keywords:
Apparent diffusion coefficient Dapp, Cross-relaxation (CR), Diffusion anisotropy, Free induction decay (FID), Goldman-Shen (GS) experiment, Inverse Laplace transform (ILT), Inversion recovery (IR) method, NMR, Pulsed field gradient (PFG) NMR, Spin-lattice (longitudinal) relaxation time T1, Spin-spin (transverse) relaxation time T2, Stimulated echo (STE), Water, Wood.
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Authors:Bentham Science Books