SEMINAR Mr.Mohamed Saiyd Gad Mostafa, postgraduate student at the Horticulture. Department, will hold a seminar on “A study of the effect of mutagenic agents on Cassia occidentalis” under supervision of 1- Prof. Azza Abd-Elazez Tawfek 2- Dr. Gehan Mostafa on 10:30 o’clock, Saturday, 2/6/2012 at the seminar hall