1. Zoology Department; Al-Azhar University, Yossuf Abbas St., PO Box 11754; Cairo Egypt
2. Biochemistry Division, Chemistry Department, Faculty of Science; Al-Azhar University, Yossuf Abbas St., PO Box 11754; Cairo Egypt
3. Biochemistry Department; Cairo University; El-Kasr El-Aeni St., PO Box 12613, Cairo Egypt