BRIGITTE ROXANA SOREANU PECEQUILO

BRIGITTE ROXANA SOREANU PECEQUILO

(Fonte: Lattes)

ORCID

ScopusID

Google Scholar

Resumo

Bachelor in Physics, University of São Paulo (1967), Master in Nuclear Technology, University of São Paulo (1971) and PhD in Nuclear Technology, University of São Paulo (1977). Was researcher at the Institute of Energy and Nuclear Research (IPEN) from 1969 to 2014. Currently is a collaborator of IPEN with the project "Gamma Spectrometry and trace detectors as tools for evaluation of natural and artificial radioactivity in several samples" and superviser at the Graduate Program of IPEN. Has experience in nuclear engineering, with emphasis on Radioisotopes Applications, acting on the following topics: nuclear instrumentation, dose assessment, environmental monitoring, natural radioactivity, alpha and gamma spectrometry, gross alpha and beta radioactivity measurements and nuclear trace detectors . As IAEA expert in the determination of radioactivity concentrations with alpha and gross beta counting systems with low background proportional detector had been in Asuncion, Paraguay (2004) and in Cuenca, Ecuador (2007). Since 1978 is professor in charge of the graduate course of IPEN, Advanced Topics in Nuclear Measurements. (Text obtained from the Currículo Lattes on October 6th 2021)

Possui graduação em Bacharel Em Física pela Universidade de São Paulo (1967), mestrado em Tecnologia Nuclear pela Universidade de São Paulo (1971) e doutorado em Tecnologia Nuclear pela Universidade de São Paulo (1977). Foi pesquisadora do Instituto de Pesquisas Energéticas e Nucleares (IPEN) de 1969 a 2014. Atualmente é colaboradora do IPEN com o projeto "Espectrometria gama e detectores de traços como ferramentas para avaliação de radioatividade natural e artificial em amostras diversas" e orientadora no Programa de Pós-Graduação do IPEN. Tem experiência na área de Engenharia Nuclear, com ênfase em Aplicações de Radioisótopos, atuando principalmente nos seguintes temas: instrumentação nuclear, avaliação de dose, monitoracao ambiental, radioatividade natural, espectrometria alfa e gama, medidas de radioatividade alfa e beta total e detectores de traços. Como expert da AIEA na operacionalização de sistemas de contagem alfa e beta total com detector proporcional de baixa radiação de fundo para a determinação da concentração de radioatividade em água potável, esteve em Assunção, Paraguai (2004) e em Cuenca, Equador (2007). Desde 1978 é professora-responsável do curso de pós-graduação do IPEN, Tópicos Avançados de Medidas Nucleares. (Texto extraído do Currículo Lattes em 06 out. 2021)

Página do item completo

Resultados de Busca

Agora exibindo 1 - 10 de 55

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.
Preliminary results of natural radioactivity in flours commercialized in the city São Paulo by high resolution gamma ray spectrometry
2019 - SILVA, GRAZIELA M. da; PECEQUILO, BRIGITTE R.S.
In the present work, the activity concentrations of natural radionuclides 226Ra, 232Th and 40K were analyzed in 32 samples of wheat, corn, manioc and rice flours commonly used by residents of the city of São Paulo, Brazil. All samples were dried, homogenized and tightly sealed in standard 100 mL HDPE flasks with plan screw cap and bubble spigot and measured for 150 ks by gamma spectrometry with an Extended Range Coaxial germanium detector (Canberra GX4020 detector), after approximately 4 weeks storage, in order to ensure secular equilibrium. All spectra were analyzed with the InterWinner 6.0 software. The 226Ra activity concentration was determined from the weighted average concentrations of 214Pb and 214Bi. The 232Th activity concentration was determined from the weighted average concentrations of 228Ac, 212Pb and 212Bi and the 40K one from its single gamma transition. The 226Ra, 232Th and 40K activity concentrations results ranged, respectively, from 0.97 Bq/kg ± 0.42 Bq/kg to 4.75 Bq/kg ± 0.82 Bq/kg, from 8.07 Bq/kg ± 2.36 Bq/kg to 19.02 Bq/kg ± 3.56 Bq/kg and from 25.22 Bq/kg ± 4.38 Bq/kg to 153.5 Bq/kg ± 17.02 Bq/kg.
Dose rates evaluation of some granitic rocks from the Paraná state
2019 - FEREIRA, ADEMAR DE OLIVEIRA; PECEQUILO, BRIGITTE R.S.
Granitic rocks, widely used as building materials, are known to contain natural radionuclides and can be an important source of radiation for the population. Thirty-four samples of granite rocks from geological occurrences in Paraná state were measured with an HPGe detector for evaluation of226Ra, 232Th and 40K activity concentrations. The effective annual external dose was evaluated from these radionuclides activities using a dosimetric room model with dimensions 4 m x 5 m x 2.8 m in which all walls are internally coated with granites of thickness 2 cm and considering an annual exposure time of 7000 h. This value was suggested by the European Commission on Radiological Protection for superficial coating materials. The internal exposure was evaluated from radon air concentration of the model room, simulated from an exhalation rate of 222Rn, determined with CR-39 solid state nuclear track detectors using the sealed can technique, considering a ventilation rate of 0.5 h-1 and an annual exposure time of 7000 h. The results of this study showed that the increase in the annual effective dose ranged from 62 ± 3 μSv.a-1 to 138 ± 1 μSv.a-1 from external gamma rays and the increase in the annual effective dose ranged from 0.39 ± 0.04 μSv.a-1 to 70 ± 4 μSv.a-1 from radon inhalation. All results stayed below 1 mSv.a-1 recommended by the European Commission on Radiological Protection.
Preliminary results of natural radioactivity evaluation in underground waters of the city of Campos do Jordao, SP, Brazil
2019 - AFFA, GABRIEL B.; PECEQUILO, BRIGITTE R.S.
Twenty-eight 5-liter samples were collected during the year of 2018 on four different campaings (January, April, August and December) for seven selected sources (SP-123, Britania, Amizade, Dom Bosco, Volta Fria, Simao and Renato) of easy and free access to the population on the city of Campos do Jordão, SP, Brazil. Samples were concentrated from 1L to 50 mL of which 4 mL pipetted on 60 mm diameter stainless steel planchet were analyzed with a Berthold’s PC-controlled 10-channel Low-level Alpha-Beta Counter LB 770 Win in three 120-minute counting cycles. Preliminary results have shown low alpha and beta activity concentrations for all sources with values ranging between 0.0288 Bq/L ± 0.0036 Bq/L and 0.1059 Bq/L ± 0.0118 Bq/L for alpha activity and between 0.0371 Bq/L ± 0.005 Bq/L and 0.1352 Bq/L ± 0.0148 Bq/L for beta activities. Results showed a tendency of higher concentrations during periods of drier weather. All obtained values are below the limits of 0.5 Bq/L and 1 Bq/L, respectively for alpha and beta activity concentrations, recommended by the 2017 WHO Guideline on Drinking Water Management.
Evaluation of Ra-226, Th-232 and k-40 activities concentrations and radium equivalent index in several brazilian economic wall paints
2015 - FONSECA, LEANDRO M.; PECEQUILO, BRIGITTE R.S.
Preliminary results of NAPL contamination in a disused industry in the city of São Paulo, Brazil, by randon evaluation with CR-39 detectors
2015 - MATEUS, CRISLENE; PECEQUILO, BRIGITTE R.S.
Natural and anthropogenic radionuclides in Brazilian commercial dog food: preliminary results
2014 - CAVALCANTE, FERNANDA; PECEQUILO, BRIGITTE R.S.
RADON as an alternative method in the investigation of environmental contamination by non-aqueous phase-liquids
2014 - MATEUS, CRISLENE; PECEQUILO, BRIGITTE R.S.
Assessment of the radiological control at the IPEN radioisotope production facility
2014 - CARNEIRO, JANETE C.G.G.; SANCHES, MATIAS P.; RODRIGUES, DEMERVAL L.; CAMPOS, DANIELA; NOGUEIRA, PAULO R.; DAMATO, SANDRA R.; PECEQUILO, BRIGITTE R.
Evaluation of gamma ray dose rates from building materials in popular dwellings of Santo Andre, SP, Brazil
1995 - CAMPOS, M.P.; PECEQUILO, B.R.S.