1. Biomedical Engineering Institute; Universidade Camilo Castelo Branco - UNICASTELO; Estr. Dr. Altino Bondesan, 500 São Jose dos Campos SP 12247-016 Brazil
2. Universidade Santa Cecília - UNISANTA; R. Dr. Osvaldo Cruz, 277 Santos SP 11045-907 Brazil
3. Department of Chemistry; University at Albany, State University of New York; 1400 Washington Avenue Albany NY 12222 USA