First Author:   Tatiane Iélia Da Silva PPGERU-URCA atianeielia24@gmail.com   Rua Coronel Antonio Luiz, 1160 Crato, 63105-010, Brazil   +55 88 998503633(Phone) +55 88 998503633(Fax) Second Author: Wellington Ribeiro Justo URCA/UFPE justowr@yahoo.com.br   325, 325, 202 Recife, 51130300, Brazil   81988481898(Phone)