S.A. Nada - National Research Centre
H.A. Amra - National Research Centre
K.B. Abdel-Aziz - National Research Centre
E.A. Omara - National Research Centre
I.M. Farag - Cell Biology, National Research Centre, Cairo, Egypt
N.S. Tawfek - Zoology, Al-Mania University, Almania, Egypt
H.R. Darwish - National Research Centre