1. Chemical Engineering Program, Department of Advanced Science and Engineering, Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8527, Japan
2. Department of Bioresources Technology and Veterinary, Vocational College, Gadjah Mada University, Sekip Unit 1 Catur Tunggal, Depok Sleman, D.I. Yogyakarta 55281, Indonesia