A 10 years old pine wood was obtained from a forest around city of Isfahan (Isfahan University of Technology, Isfahan, Iran)
(32340N, 51320E), and dried at 45 C. They were debarked, cut, and grinded. The chips were screened to achieve a relatively homogeneous size of less than 1 mm (20 mesh). The dry weight content of the selected samples was measured by drying at 105 C.