1. Centro de Tecnologia, Universidade Federal do Ceará, Fortaleza, Brazil
2. Center of Sciences and Technology, Universidade Estadual do Ceará, Fortaleza, Brazil
3. Fatigue and Aeronautical Materials Research Group, Department of Materials and Technology, UNESP - Univ. Estadual Paulista, São Paulo, Brazil
4. Embrapa Cotton, Campina Grande, Brazil
5. Embrapa Tropical Agroindustry, Fortaleza, Brazil
6. Embrapa Instrumentation, São Carlos