Document Type : Original Article
Authors
1 Physics Dpt., faculty of science (boys), Al azhar University
2 Physics Dpt., faculty of science (girls), Al azhar University
3 Ceramics and Building materials Dept., National Research Centre, 12622 El-Tahrir street, Dokki, Cairo
4 Biophysics branch, Physics Department, Faculty of Science, Al-Azhar University(girls), Nasr City 11884, Cairo, Egypt.
5 biophysics, Azhar university
Abstract
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