Hassan II University of Casablanca Faculty of Science and Technology Laboratory of Process Engineering & Environment. Chemical Analysis and Biosensors team. B.P. 146, 20 850 Mohammedia, Morocco Tel: ++212 661454198; Fax: ++212 523 315353; Email: azizamine@yahoo.fr; aziz.amine@etu.fstm.ac.ma www.biocap.matherankway.com