1. Department of Applied ChemistryGraduate School of Engineering Hiroshima University, Higashi‐ Hiroshima 739‐8527 Japan
2. Osaka Research Institute of Industrial Science and Technology Morinomiya Center, 1‐6‐50 Morinomiya, Joto‐ku Osaka 536‐8553 Japan
3. Technical Research Institute Rinrei Wax Co. Ltd, 180 Soya Hadano Kanagawa 257‐0031 Japan