Alterações Miofuncionais Orofaciais Associadas ao Processo de Envelhecimento em um Grupo de Idosos Institucionalizados

Abstract

The emission yields of SO2at 2.0 Torr pressure were measured in the presence of foreign gases at 25° C with incident radiation at 3130 Å. Experiments were performed without and with 0.33 Torr of NO present in order to measure the total and singlet relative emission efficiencies. The foreign gases studied were NO, CO2, CO, N2, O2, N2O, H2O, OCS, and thiophene. The main purpose of the study was to extend the quenching gas pressure range beyond that used previously, to see if deviations occurred from the Stern-Volmer quenching plots. Such deviations did occur for the emitting singlet state,1SO2, but not for the emitting triplet state,3SO2. It is concluded that1SO2is neither the state initially produced when the radiation is absorbed, nor the exclusive precursor state to3SO2formation. Relative quenching constants obtained for the singlet and triplet emitting states agree well with previous work. There is no excess3SO2produced over that predicted from Stern-Volmer quenching. ©1973.