Hindun Hindun, Universitas Negeri Yogyakarta, Indonesia
Heru Pratomo, Universitas Negeri Yogyakarta, Indonesia

Eamd Yousif, Department of Chemistry, College of Science, Al-Nahrain University, Iraq
Dina Ahmed, Department of Chemical Industries, Institute of Technology-Baghdad, Middle Technical University, Iraq
Hanan Ibraheem, Department of Chemistry, College of Science, Al-Nahrain University, Iraq
Rahimi Yusop, College of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Malaysia
Khalid Zainulabdeen, Department of Chemistry, College of Science, Al-Nahrain University, Iraq
Amamer Redwan, College of Chemistry, Faculty of Science, Bani Waleed University, Libya