TRANSVERSE SHRINKAGE OF CONIFEROUS WOOD CELLS EXAMINED USING REPLICA METHOD AND POWER SPECTRUM ANALYSIS

The shrinkage behavior of coniferous wood cells was investigated by th e power spectrum analysis as well as by the replica method. During dry ing, cell lumens shrank in normal wood and expanded in compression woo d, depending on their cell wall structures. The tracheids of Agathis b ornensis with no distinct growth rings also showed the anisotropic shr inkage. The representative cell models before and after shrinkage cons tructed by the power spectrum analysis revealed that the difference in the anisotropic shrinkage among wood species greatly depended on thei r transverse cell shapes.