DALTON GIOVANNI NOGUEIRA DA SILVA

DALTON GIOVANNI NOGUEIRA DA SILVA

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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 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.
X-ray experimental set-up for in-vivo nail test
2022 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; ALMEIDA, M.R.; TODO, A.S.; RODRIGUES JUNIOR, O.
Propostas alternativas para o conhecimento e uso da Energia Nuclear
2022 - ZAMBONI, C.B.; GIOVANNI, D.N.S.; KOKA, A.C.; ALMEIDA, M.R.; MEDEIROS, I.M.M.A.; LEAO, A.R.
Non-destructive analysis in the study of historical photographs by pXRF and ATR-FTIR spectroscopies
2021 - ZAMBONI, CIBELE B.; REDÍGOLO, MARCELO M.; MIURA, VINICIUS T.; COSTA, ISOLDA; NAGAI, MARIA L.E.; SALVADOR, PABLO A.V.; SILVA, DALTON G.N. da
Material characterization is essential to the provenance of graphic arts. Non-destructive analytical techniques are increasingly required in the authentication process of cultural heritage. This work presents a suite of portable, non-destructive, and complementary analytical techniques, energy dispersive x-ray fluorescence (EDXRF), Fourier transform infrared (FTIR) spectroscopies, and brightfield microscopy, applied to the analysis of historical photographs depicting São Paulo city architecture, whose registration date and process of fabrication are unknown. The EDXRF analysis emphasizes the use of typical POP (printing-out paper) photograph with baryta (BaSO4) coated paper substrate while the FTIR and microscopy analyses confirm the presence of collodion and a gelatin-based baryta layer. This photographic process was widely employed by professional photographers from 1889 to 1930, when it was gradually abandoned in commercial use. This time interval (1889–1930) is consistent with the information surveyed on the photographic collection. In conclusion, employing complementary techniques (elemental and molecular spectroscopies and image magnification) is essential in identifying the manufacturing materials of cultural heritage material, which is the basis of contemporary authentication procedures. These data provide to curators and historians fundamental information for cataloging, adding subsidies for the correct storage and preservation (“heritage appreciation”). Still, for professional photographers, they present information on the manufacturing processes of historical photographs. The data from the present study also emphasize its perspective of use in graphic arts to aid connoisseurship in identifying forgeries during provenance and authentication studies.