Influence of drying conditions on the effective diffusivity and activation energy during convective air and vacuum drying of pumpkin - Seremet (Ceclu), Liliana; Botez, Elisabeta; Nistor, Oana-Viorela; Gogus, Fahrettin; Andronoiu, Doina Georgeta; Mocanu, Gabriel-Dănuţ (The Annals of the University Dunarea de Jos of Galati. Fascicle VI - Food Technology, 2015)