1. Science of Polymeric Materials, Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
2. Materials Structure Group I, The Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148, Japan
3. Department of Plant & Environmental New Resources, College of Life Sciences, Kyung Hee University, 1732 Deogyeong-daero, Giheung-ku, Yongin-si, Gyeonggi-do 446-701, Republic of Korea