oleh Nelson Saksono; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Yuliusman .; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Setijo Bismo; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Roekmijati W. Soemantojo; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Azwar Manaf; Department of Physics, Faculty of Mathematics and Science, University of Indonesia, Depok 16424 Indonesia

oleh Nelson Saksono; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Setijo Bismo; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Roekmijati Widaningroem; Department of Chemical Engineering, Faculty of Engineering, University of Indonesia, Depok 16424, Indonesia , Azwar Manaf; Department of Physics, Faculty of Mathematics and Science, University of Indonesia, Depok 16424, Indonesia