1. Department of Environmental Science, Graduate School of Fisheries and Environmental Sciences, Nagasaki University, 1‐14 Bunkyo‐machi, Nagasaki 852‐8521 (Japan) http://seijishirakawa.wix.com/greenchemistry
2. Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606‐8502 (Japan)