NMR techniques in studying water in biotechnological systems

摘要

Plot of distribution obtained by 1D ILT analysis of CPMG data measured on wet wood sample (spruce).  = 298 K, and a proton frequency = 400 MHz. The moisture content of this piece of wood is higher than the fiber saturation point (FSP). The FSP is the point at which all the free water has been removed, and there is only bound water left. This is mostly between 25 and 30% moisture content (Rodin ). Below the FSP, there should be one or two values in the range of 1 to 15 ms. Above the FSP, in addition to the short components, a long component between 20 and 100 ms appears. So, there are three components in total above the FSP (Rodin ). -scale is relative intensity in arbitrary units.