1. Faculty of Science, Department of Chemistry, University of Cairo, Giza, Egypt
2. Faculty of Science, Department of Chemistry, Islamic University in Almadinah Almonawara, Almadinah Almonawara, Saudi Arabia
3. Faculty of Applied Science, Chemistry Department, Umm Al-Qura University, Makkah Almukkarramah, Saudi Arabia
4. Department of Tanning Material and Leather Technology, National Research Center, Dokki, Cairo, Egypt