1. Department of Animal Biotechnology, College of Agriculture and Life Sciences, Chonbuk National University, Jeonju, 561-756, Republic of Korea
2. Department of Wood Science and Technology, College of Agriculture and Life Sciences, Chonbuk National University, Jeonju, 561-756, Republic of Korea
3. Graduate School, Department of Energy Storage/Conversion Engineering, Hydrogen and Fuel Cell Research Center, Chonbuk National University, Jeonju, 561-756, Republic of Korea