LUCIANA APARECIDA FARIAS
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Artigo IPEN-doc 20599 Selenium status and hair mercury levels in riverine children from Rondônia, Amazonia2014 - ROCHA, ARIANA V.; CARDOSO, BARBARA R.; COMINETTI, CRISTIANE; BUENO, RAFAEL B.; BORTOLI, MARITSA C. de; FARIAS, LUCIANA A.; FAVARO, DEBORAH I.T.; CAMARGO, LUIS M.A.; COZZOLINO, SILVIA M.F.Objective: Riverine communities in Rondo ˇ nia State are exposed to high selenium (Se) content in their diet because of the high-selenium soils identified in the Amazon. However, the Amazonian population has a high mercury (Hg) exposure because this metal accumulates in the soil. Because children are more vulnerable to Hg toxicity, the aim of this study was to evaluate and correlate Se status and hair Hg levels in riverine children (aged 3–9 y) living in two different locations in Rondo ˇ nia State: Demarcac¸ ao area (DA) and Gleba do Rio Preto (GRP). ~ Methods: Se levels were assessed using hydride generation quartz tube atomic absorption spectroscopy; total hair Hg levels were assessed using cold vapor atomic absorption spectrometry. Dietary intake was evaluated through a 24-h food record and a food frequency questionnaire. Results: Forty-two children participated in this study. Eighty-four percent of the children from DA showed low plasma Se. Conversely, all children from GRP presented plasma Se levels above the reference values. Forty-five percent of the children from DA presented low erythrocyte levels, and 55% of the children from GRP showed concentration in erythrocyte above the reference values. The mean Se intake was 41.8 mg/d in DA and 179.0 mg/d in GRP. High hair Hg levels were observed in children from both the DA and GRP (3.57 1.86 and 6.24 5.89, respectively). Conclusions: Children from both riverine communities are likely to present altered Se status according to their dietary intake. Additionally, these children are highly exposed to Hg, mainly through fish consumption, and the toxicity of this metal may cause metabolic damage.Artigo IPEN-doc 13026 Preparation of PtSn/C and PtSnNi/C electrocatalysts using the alcohol-reduction process2008 - SPINACE, ESTEVAM V.; FARIAS, LUCIANA A.; LINARDI, MARCELO; OLIVEIRA NETO, ALMIRPtSn/C electrocatalyst with Pt:Sn molar ratio of 50:50 and PtSnNi/C electrocatalyst with a Pt:Sn:Ni molar ratio of 50:40:10 were prepared by the alcohol-reduction process using ethylene glycol as solvent and reducing agent. The electrocatalysts were characterized by EDX, XRD, TEM and cyclic voltammetry. The electro-oxidation of ethylene glycol was studied by cyclic voltammetry and chronoamperometry using the thin porous coating technique. PtSnNi/C electrocatalyst showed a superior performance compared to PtSn/C electrocatalysts in the potential range of interest for direct ethylene glycol fuel cell.Artigo IPEN-doc 17277 Chemical and radiological characterization of clay minerals used in pharmaceutics and cosmetics2011 - SILVA, PAULO S.C.; OLIVEIRA, SONIA M.B.; FARIAS, LUCIANA; FAVARO, DEBORAH I.T.; MAZZILLI, BARBARA P.