1. GESSA, Research Group, Department of enviromental Sciences; Corporación Universidad de la Costa (CUC); Barranquilla Colombia
2. Carboquimica, Research Group, Department of Chemistry; Universidad de Cartagena; Cartagena Colombia
3. Estudios en Materiales y Combustibles, Research Group, Department of Chemistry; Universidad de Cartagena; Cartagena Colombia
4. Department of Chemistry; Universidad del Atlántico; Barranquilla Colombia