1. Department of Forestry, National Chung Hsing University, 145 Xingda Road, South District, Taichung City 402, Taiwan, Republic of China
2. Division of Forest Chemistry, Taiwan Forestry Research Institute, 53 Nanhai Road, Taipei 10066, Taiwan, Republic of China
3. Division of Forest Utilization, Taiwan Forestry Research Institute, 53 Nanhai Road, Taipei 10066, Taiwan, Republic of China
4. Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China