1. Interdisciplinary Bachelor of Science and TechnologyFederal University of Maranhão Avenida dos Portugueses, 1966, Bacanga, São Luís 65080‐805 Brazil
2. Faculty of Chemical EngineeringFederal University of Maranhão Avenida dos Portugueses, 1966, Bacanga, São Luís 65080‐805 Brazil
3. Faculty of Electrical EngineeringFederal University of Maranhão Avenida dos Portugueses, 1966, Bacanga, São Luís 65080‐805 Brazil