1. Department of Animal Science, College of Animal Science and Food Engineering, University of São Paulo, Pirassununga, Brazil
2. Department of Nutrition and Porduction, School of Veterinary Medicine and Animal Science, University of São Paulo, Pirassununga, Brazil
3. Department of Chemistry, Federal University of São Carlos, SP- São Carlos, Brazil
4. Embrapa Instrumentação, São Carlos, Brazil
5. Department of Animal Sceince, College of Agricultural Science, Federal University of Dourados, Dourados, Brazil