DALTON GIOVANNI NOGUEIRA DA SILVA

DALTON GIOVANNI NOGUEIRA DA SILVA

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Tecnologias analíticas instrumentais para a investigação de madeira
2024 - ZAMBONI, CIBELE B.; GIOVANNI, DALTON; SILVA, PAULO S.C. da; MOREIRA, EDSON G.; LOBOS, CRISTIAN M.V.; SARRIES, GABRIEL A.; NOGUEIRA, ANA R. de A.; BACCHI, MARCIO A.; MARTINELLI, LUIZ A.; FERNANDES, ELISABETE A. de N.
A madeira é uma commodity produzida no Brasil que tem relevância no cenário econômico entretanto o impacto ambiental, devido à expansão das áreas de exploração, tem gerado preocupação com o desmatamento e consequente alterações ambientais, principalmente na região amazônica. Na presente investigação foram testadas três metodologias analíticas instrumentais para autenticação da madeira nativa da Amazônia com base em sua caracterização físico-química. O emprego combinado das técnicas espectrométricas como Fluorescência de Raios X (FRX), bem como análise de compostos orgânicos por Espectroscopia Raman (ER) e Infravermelho (IR) mostraram-se eficiente para uso em metrologia forense, disponibilizando dados que podem ser usados na identificação de madeira nativa, compondo metodologia alternativa para monitoração dos problemas enfrentados na região amazônica (desmatamento, queimadas e invasões ilegais). Além disso, a metodologia estabelecida no presente estudo pode ser aplicada a outras regiões do Brasil, que também produz esse tipo de commodity e enfrentam os mesmos problemas.
Determination of iron in wheat and corn flour using X-ray fluorescence technique
2024 - GIOVANNI, D.N.S.; ZAMBONI, C.B.; SILVA, S.M.L.; NOGUEIRA, I.M.; NOGUEIRA, T.M.; CHOLLET, T.O.; OLIVEIRA, E.C.R.; COSTA, E.A.
Investigation of inorganic elements in soil in the municipality of Barra do Corda using EDXRF technique
2024 - GIOVANNI, D.N.S.; ZAMBONI, C.B.; PECEQUILO, B.R.S.; ESPOSITO, S.E.; PIMENTA, D.C.; SIMONS, S.M.
Determination of blood iron by EDXRF in the female population over 60 years of age
2024 - BENEDITO, M.G.M.; ZAMBONI, C.B.; GIOVANNI, D.N.S.; BUENO JUNIOR, C.R.
Analysis of the coxal liquid of O. brasiliensis tick species by analytic techniques
2024 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; SIMONS, S.M.
Multi-elemental analysis by FRXDE on pollen produced by the native bee Scaptotrigona aff. Fake
2023 - GIOVANNI, DALTON N. da S.; ZAMBONI, CIBELE B.; PECEQUILO, BRIGITTE R.S.; ALIFIO-ESPOSITO, SELENE; PIMENTA, DANIEL C.; SIMONS, SIMONE M.
Brazil is one of the largest suppliers of bee products in the world. It is currently the 5th largest exporter of honey and derivatives and a significant part of its production originates from the south and northeast. Specifically, the species Scaptotrigona aff. Postica, from the region of Barra do Corda in the State of Maranhão (MA), produces pollen which is one of the main activities of the local economy (food supplement). However, there are no data on its mineral composition, although there is a history of applications in the nutritional field. In this context, this research aims to generate integrated and interdisciplinary knowledge of the pollen produced by this pollinating species, through multi-element investigation (identification and quantification of chemical elements) using the Energy Dispersive X-ray Fluorescence (XRF) technique. The elemental composition of pollen emphasizes its nutritional relevance (Ca, Cl, Fe, K, Mn and P) and the results of the concentrations showed little seasonal variation, serving as a model for the safe expansion of meliponiculture in the region. In the technological sphere, this analysis is a tool for tracking (provenance), which allows the identification of fraud and/or adulteration, in addition to adding quality control to its commercialization.
X- ray experimental set-up for in-vitro nail test
2023 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; ALMEIDA, M.R.; TODO, A.S.; SABARA, F.; RODRIGUES JUNIOR, O.
In this investigation, the elements Ca and S were evaluated in a single nail clipping using compact and portable X-ray spectrometer model X-123 SDD with Ag target. Experimental conditions for current, voltage and excitation time were investigated. These analyses can be useful for a variety of applications, including nutritional and medical diagnosis, such as, the evaluation of bone dysfunctions by measurement of Ca (bone decalcification) and S for nutrition evaluations (collagen production). This analysis offers some benefits comparatively to blood and serum analyses, such as, non-invasive collection, fast analyses (minutes) and low cost. In addition, nail clippings are simple to obtain, easy to store, and easy to transport. This pilot study show a positive expectation for clinical application using in-vitro nail test.
X-ray investigation of graphic art
2023 - SILVA, ANA C.K. de S.; ZAMBONI, CIBELE B.; SILVA, DALTON G.N. da
X-rays produced by electron ionization provide an analytical tool that can assist investigations in the field of Artistic and Cultural Heritage. In this study, the technique of Energy Dispersive X-ray Fluorescence (EDXF) was employed to investigate collections of postcards from the 1960s produced in Brazil, London and Uruguay. The collections belong to private collections and were made available for analysis at the Radiation Spectroscopy and Spectrometry Laboratory of the Institute for Nuclear and Energy Research (IPEN). This technique is non-destructive and allows the identification of chemical elements present in the different chemical formulations used in the printing industries of each country in the process of preparing postcards. This information allows tracing their origin and identifying copies/fakes, which enables their cataloging and registration for exhibition, as well as providing subsidies for conservators and restorers regarding the preservation and storage of these artistic materials.
Study on the radiation exposure of Portable X-ray Fluorescence
2023 - DIAS, F.S.; GIOVANNI, D.N.S.; POTIENS JUNIOR, A.J.; RODRIGUES JUNIOR, O.; POTIENS, M.P.A.; ZAMBONI, C.B.
Young Scientist Project presents Neutron Life
2023 - ZAMBONI, CIBELE B.; GIOVANNI, DALTON N.S.; KOKA, ANA C.; STANOJEV, MARCO
The Young Scientist Project was created in 2019, by the team of the Spectroscopy and Spectrometry of Radiation Laboratory (LEER/IPEN), with the proposal to implement nuclear knowledge in academia and for the general public. The objective is to develop alternative proposals for knowledge, application and dissemination of nuclear physics using social networks. The website www.jovemcientista.com.br design involves four menus: REPORTS where researchers talk about their career and perspectives in the field; NUCLEAR MINUTE: where nuclear physics concepts are covered in one-minute videos; CURIOSITIES: a space where various themes are presented, including several nuclear applications; INTERVIEWS: conducted by students to discuss its work and a COMMUNICATION CHANNEL with the entire team. All activities involve the participation of students from scientific initiation to post-doc and the content produced is available on social networks YouTube (Jovem Cientista), Instagram (@jovemcientista.com.br) associated with a Facebook page Facebook (@jovemcientista.com.br), TikTok (@jovemcientista.com.br) and by LinkedIn and Twitter in the editors’; profile. Now, we are present a new menu NEUTRON LIFE whose content is produced mainly for graduate students. The idea is to present topics related to neutron physics in a relaxed way, through the elaboration of videos and comic strips. Since the implementation of the Young Scientist Project, interaction with students and the public has been positive, helping to demystify and disseminate nuclear physics.