Voltammetric Study For Cuso4 in Presence of Safranin (Saf ) in Hcl Solutions using New Multicarbon Nanotubes Doped with Nano Tantalum Pentoxide Working Electrode Journal title: To Chemistry Journal Authors: Esmhassan Arafa Gooma, Moustafa A Diab, Adel Z Sonbati, Gannat S Abd Elraoof Subject(s):