Stopień krystaliczności celulozy jako wskaźnik dojrzałości tkanki drzewnej

The study attempts to assess whether degree of cellulose crystallinity in oak and European larch wood determined with specific technique of X−ray shows a similar trend as the change of early− and latewood ratio in annual rings and to verify the accuracy of the graphical methods used to establish the areas of juvenile and mature wood in stems of forest trees. The resulting trends of changes in the cellulose crystallinity within the stems have confirmed the validity of methods of determining the areas of juvenile and mature wood based on measurements of macroscopic elements of wood. In addition to such utility knowledge of the degree of cellulose crystallinity can also be useful in assessing the quality of wood tissue in the context of ageing and an important factor in determining the optimal rotation age of forest trees.