1. Department
of Chemistry, Federal University of Lavras, P.O. Box 3037, 37200-000, Lavras, MG, Brazil
2. Federal Institute of Science, Education and Technology of Southwest MG, Campus Rio, Pomba, MG, Brazil
3. Center
for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Hradec Kralove, Czech Republic