MARIA JOSE AGUIRRE ARMELIN
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Artigo IPEN-doc 25750 Concentrations of Se, Ba, Zn and Mn in Brazil nuts2019 - ARMELIN, M.J.A.; MAIHARA, V.A.; COZZOLINO, S.M.F.; SILVA, P.S.C.; SAIKI, M.The concentrations of Se, Ba, Zn and Mn were determined in samples of Brazil nuts collected in two ways: a) in a production farm predominantly for export and, b) in various points of sale from different regions of Brazil. Instrumental neutron activation analysis was the analytical technique used in this study. Results indicate that the concentrations of Se and Ba varied greatly among the Brazil nut samples analyzed. This large variability may be related to the soil characteristics from which the nuts were produced. An inverse correlation was observed between the concentrations of Se and Ba. On the other hand, the concentrations of Zn and Mn did not show significant differences among these samples.Artigo IPEN-doc 22770 Activity levels of gamma-emitters in Brazil nuts2016 - ARMELIN, M.J.A.; MAIHARA, V.A.; COZZOLINO, S.M.F.; SILVA, P.S.C.; SAIKI, M.Activity concentrations of the radionuclides 137Cs, 40K, 226Ra and 228Ra were determined in Brazil nuts acquired at points of sale between 2010 and 2013. Results indicated that the estimated annual effective radioactive dose due to ingestion of Brazil nuts is 27% of the annual dose limit of 1 mSv y-1 for public exposure, according to the Interna-tional Commission on Radiological Protection (ICRP). To estimate this dose the highest activity concentration ob-tained for each radionuclide was considered, assuming an annual consumption of 1.5 kg y-1 per individual.