1. Department of Wood and Paper Science , 34933 College of Agriculture, Life & Environment Science, Chungbuk National University , Cheongju 28644 , Republic of Korea
2. Department of Forest Products , 34933 College of Agriculture, Life & Environment Science, Chungbuk National University , Cheongju 28644 , Republic of Korea
3. Forest Products and Industry Department , National Institute of Forest Science , Seoul 02455 , Republic of Korea
4. Forest Environment and Conservation Department , National Institute of Forest Science , Seoul 02455 , Republic of Korea