DALTON GIOVANNI NOGUEIRA DA SILVA

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2019 - 201932020 - 20211
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Agência de fomento: Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) × Assunto: neutron activation analysis ×

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Agora exibindo 1 - 4 de 4
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    Capítulo IPEN-doc 28008
    Análise de zinco em sangue de corredores de longa distancia
    2021 - SILVA, DALTON G.N. da; ZAMBONI, CIBELE B.; ALMEIDA, MATEUS R. de; MEDEIROS, JOSE A.G. de
    O objetivo deste estudo foi avaliar o zinco no sangue de atletas por metodologia de ativação de nêutrons. Os resultados mostraram deficiência de zinco para a maioria dos atletas. O estudo mostrou a eficácia da utilização desse procedimento analítico para sucessivas avaliações clínicas, durante o período de preparação das competições, fornecendo dados que auxiliam na elaboração de uma dieta balanceada, bem como contribuem para a proposição de novos protocolos de avaliação clínica.
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    Artigo IPEN-doc 26475
    Multielemental analyses of Lonomia obliqua (Lepidoptera, Saturniidae) caterpillar using EDXRF and INAA techniques
    2019 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; SALVADOR, V.L.R.; SATO, I.M.; MENDONÇA, R.Z.; WEN, F.H.; SIMONS, M.S.
    In this study, multielemental analysis of Lonomia obliqua (Lepidoptera, Saturniidae) caterpillar was performed using energy dispersive X‐ray fluorescence and instrumental neutron activation analysis techniques. This caterpillar is poisonous and has the ability to cause fatal hemorrhagic effects in humans after contact. The need of this study is related to morphological changes (mainly size and color) observed in some caterpillars used for preparation of antilonomic serum (antivenom). The samples were classified as healthy (caterpillars of control) and unhealthy (caterpillars visibly modified). The XRF measurements were performed in an energy dispersive X‐ray fluorescence spectrometer and the instrumental neutron activation analysis using the IEAR1 nuclear reactor at IPEN. The results show significant differences for several elements (mainly, P, Cl, Ca, Ti, Mn, Fe, Ni, and Zn) in unhealthy caterpillars that can affect the development of this species as well as the quality and yield of the antivenom. Furthermore, its elemental characterization contributes for the understanding the potential pharmacological (procoagulant and antithrombotic) in the prevention of life‐threatening blood clots.
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    Artigo IPEN-doc 26146
    Investigation of elements in sweeteners by NAA analytic technique
    2019 - MEDEIROS, ILCA M.M.A.; ZAMBONI, CIBELE B.; GIOVANNI, DALTON N.S.; MEDEIROS, JOSÉ A.G. de
    In this study, brands of sweeteners (aspartame and sucralose) marketed in Brazil were investigated by Neutron Activation Analysis (NAA). The measurements were performed using the IEA-R1 nuclear reactor at IPEN - CNEN/SP. The elements Cl and Na were identified in all samples. The Na concentration in sweeteners samples showed low content for most of the brands (0.013 –3.81 g kg-1), while Cl had high concentration variation (0.04 – 11.10 g kg-1). These data provide knowledge regarding nutritional aspect and toxicity derived from sweetener consumption.
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    Artigo IPEN-doc 26145
    Progress and trends for radiation applications in clinical practice
    2019 - ZAMBONI, CIBELE B.; METAIRON, SABRINA; MEDEIROS, JOSE A.G. de; SILVA, DALTON G.N. da; TASSO, ORION G.
    In this study, we intend to optimize the use of equipment based on the X-Ray Fluorescence technology to perform ions dosage in body fluids. This procedure can be an efficient alternative for clinical diagnosis, mainly in underserved regions of Brazil with the deficit of medical care in the hospitals. In addition, this procedure has potential use when the biological material is scarce, case of the pediatric practice in newborns and premature infants (blood collection is the main cause of transfusions) as well as in Hemodialysis units which requires several biochemical tests (before and after dialysis).