1. USTHBMaterials Polymer LaboratoryDepartment of Macromolecular ChemistryFaculty of ChemistryPO BOX 32, El AliaAlgiers16111Algeria
2. USTHBLaboratory of Hydrometallurgy and Inorganic Molecular ChemistryFaculty of ChemistryPO BOX 32, El AliaAlgiers16111Algeria