Pr. MEGHACHOU Mourad, Rector of the University of Tlemcen presided over the launch of the work of the fifth edition of the "science festival", organized by the chemist club chemtalks in coordination with Laboratory of Catalysis and Synthesis in Organic Chemistry, supervised by Pr. CHAKCHOU BRAHEM Noureddine. Several valuable conferences were held by teachers including Pr.OUARAG Hafid, Pr.DIB Amazigh, Pr.CHIKHI Ibrahim, Pr.DIB Hasseine and Dr KHEFIF Mohammed as well as artistic and scientific exhibitions for science clubs were also held