Acknowledgments
The authors gratefully acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for financial support, the Federal University of Rio Grande do Norte (UFRN) for the physical structure and the Regional Integrated University (URI) for sample analysis.

Author Contributions
Francine Bertella and Sibele Pergher conceived and designed the experiments; Francine Bertella performed the experiments; Francine Bertella and Sibele Pergher analyzed the data and wrote the paper.

Conflicts of Interest
The authors declare no conflict of interest.