Institution: | a Centre of Biomaterials, University of Havana, BOX 6130, 10600 Havana, Cuba b Institute of Toys Technology (AIJU), Av. Industria s/n, 03440 Ibi (Alicante), Spain c Analytical Chemistry Department, University of Alicante, P.O. Box 99, 03080 Alicante, Spain |