Pixe analysis of trace elements in whole blood and serum of young adults in São Paulo, Brasil - Santos, Suene Bernardes dos; Tabacniks, Manfredo Harri; Barbosa, Marcel Dupret Lopes; Added, Nemitala; Rizzutto, Márcia de Almeida; Martinez, M. B.; Machado, Juliana B. A (International Conference on Nucleus Nucleus Collisions, 2006)