1. IPC/I3N, Institute for Polymers and Composites, University of Minho; Campus de Azurém 4800-058 Guimarães Portugal
2. Unité Mixte de Recherche, Ingénierie des Agropolymères et Technologies Emergentes, INRA/ENSA.M/UMII/CIRAD, Université Montpellier II; cc 023, place Eugène Bataillon 34095 Montpellier Cedex France
3. CEB, Centre of Biological Engineering, University of Minho; Campus de Gualtar 4710-057 Braga Portugal