1. Department of Environmental Systems Engineering, Nagaoka University of Technology, Nagaoka, Niigata 940-2188, Japan
2. Institute of Biological Resources and Functions, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan
3. Division of Industrial and Environmental Physics, Indonesian Institute of Sciences, Kompleks LIPI, Bandung 40135, Indonesia