Application of the mass spectrometry (ESI-MS/MS) in the identification of microbial products - Martinez, Ana Flávia Canovas; Colombo, Bruna; Petta, Tânia; Melo, Flávia Mandolesi Pereira de; Melo, Itamar Soares de; Moraes, Luiz Alberto Beraldo de (Congresso BrMass, 2007)