Ali ABD EL AZIZ Faculty of Engineering, Fayoum University, Fayoum, Egypt
Salh Abdelaleem
Chemistry Department, Faculty of Science, Fayoum University, Fayoum, Egypt
Mohamed Heikal
Chemistry Department, College of Science, Al-Imam Muhammad Ibn Saud Islamic University (IMSIU), P.O. Box 90950, Riyadh 11623, Saudi Arabia Permanent Address: Chemistry Department, Faculty of Science, Benha University, Benha, Egypt