Optimized conventional and ultrasound-assisted ethyl transesterification of jatropha (Jatropha curcas) and palm (Elaeis guineensis) oil mixtures - Arce Saavedra, Thony; Bueno-Borges, Larissa Braga; Sangaletti-Gerhard, Naiane; Alencar, Severino Matias de; Baptista, Marisa Aparecida Bismara Regitano-d’Arce de (Chemical Engineering Communications, 2022)