Navegação IPEN por assunto "ecological concentration"

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  • IPEN-DOC 27457

    BASSO, LUANA S.; GATTI, LUCIANA V. ; MARANI, LUCIANO; DOMINGUES, LUCAS G. ; CRISPIM, STEPHANE P.; NEVES, RAIANE A.L.. Determinação das concentrações de CH4 na Amazônia Brasileira utilizando perfis verticais de avião. In: ENCONTRO ACADÊMICO DA ENGENHARIA AMBIENTAL DA EEL-USP, 3., 3-4 de junho, 2019, Lorena, SP. Anais... Lorena, SP: Escola de Engenharia de Lorena - USP, 2019.

    Palavras-Chave: methane; climatic change; greenhouse gases; ecological concentration; amazon river

  • IPEN-DOC 22264

    ROSSI, JOAO G.G. de A. ; SAIKI, MITIKO . Determinação de elementos traço em Tradescantia pallida pelo método de análise por ativação com nêutrons. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA, 14.; PROGRAMA DE BOLSAS E INICIAÇÃO CIENTÍFICA CNEN, 5., 5-6 de novembro, 2008, São Paulo, SP. Resumo expandido... 2008. p. 161-162.

    Palavras-Chave: elements; trace amounts; tradescantia; neutron activation analysis; air pollution monitoring; brazil; iear-1 reactor; plants; leaves; thermal neutrons; irradiation; gamma spectrometers; high-purity ge detectors; ecological concentration; accuracy; herbs; multi-element analysis

  • IPEN-DOC 22120

    NAKANISHI, VANESSA M. ; FLUES, MARLENE . Determinação do coeficiente de distribuição (Kd) de Zn e Mn em colunas de solo pelo método de isoterma de adsorção. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA, 13.; PROGRAMA DE BOLSAS E INICIAÇÃO CIENTÍFICA CNEN, 4., 29-30 de agosto, 2007, São Paulo, SP. Resumo expandido... 2007.

    Palavras-Chave: distribution; manganese; soils; adsorption isotherms; brazil; abundance; ecological concentration; adsorption

  • IPEN-DOC 23366

    TEIXEIRA, LUIZ F.L. . Determinação dos radionuclídeos naturais urânio e tório nos sedimentos superficiais do sistema Cananéia - Iguape / Determination of uranium and thorium natural radionuclides in sediments from Cananéia-Iguape system . 2017. Dissertação (Mestrado em Tecnologia Nuclear) - Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP, São Paulo. 77 p. Orientador: Bárbara Paci Mazzilli. DOI: 10.11606/D.85.2017.tde-24072017-153833

    Abstract: O sistema Cananéia-Iguape é um grande complexo de canais lagunares e estuarinos, localizado no sul do estado de São Paulo. Este sistema passou a receber as águas do rio Ribeira de Iguape após a abertura do canal do Valo Grande, finalizado no ano de 1852. Este canal tornou-se a principal rota de transporte das produções da região do Vale do Ribeira, e nas décadas de 1940 a 1990 as atividades de mineração da região contaminaram o rio Riberia de Iguape, causando alterações nas características originais do sistema Cananéia-Iguape. Este estudo avaliou os níveis de urânio e tório nas amostras de sedimentos superficiais deste sistema. Esta avaliação foi feita através de um método espectrofotométrico utilizando Arsenazo III. As amostras foram digeridas em um forno micro-ondas com aplicação de HNO3, HF e H2O2. As concentrações de urânio variam de 1,3 mg·kg-1 a 5,8 mg·kg-1 e as de tório de 0,82 mg·kg-1 a 12,1 mg·kg-1. Estes resultados foram comparados com os dados da região, e observou-se que as concentrações determinadas são similares. O índice de geoacumulação foi calculado, classificando a região como \"Não contaminada a moderadamente contaminada\" para urânio e \"Não contaminada\" para tório, indicando que não há contaminação por estes metais. Estes resultados podem ser considerados como a concentração basal da região. As avaliações estatísticas identificaram uma maior afinidade do urânio e do tório com a fração de argila e silte. As concentrações de U e Th não apresentaram um comportamento homogêneo ao longo do sistema estudado.

    Palavras-Chave: spectroscopy; thorium minerals; uranium minerals; arsenazo; nitric acid; hydrogen fluorides; hydrofluoric acid; hydrogen peroxide; sediments; sediment-water interfaces; silt; surfaces; ecological concentration; brazil; comparative evaluations

  • IPEN-DOC 24082

    SILVA, JULIANA C. ; MARTINS, ELAINE A.J. ; COTRIM, MARYCEL E.B. ; PIRES, MARIA A.F. . Determination of Polycyclic Aromatic Hydrocarbons (PAHs) in sediment samples of Brazilian Multipurpose Reactor (RMB) installation area. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: RMB will be a nuclear reactor for research and production of radioisotopes. Its applications extend to agriculture, industry and the environment. With the changes that will occur in the study area by its construction, the flow of vehicles will increase. It is known that one of the largest anthropogenic sources of PAHs is from the burning of fossil fuels and biomass. The aim of this research was to identify and quantify 14 of the 16 majorities PAHs in the sediment samples at RMB installations area in a period before the enterprise construction, June 2017, using the methodology developed and validated by Brito, 2009. It was observed individual concentrations from 0.05 to 1.11 μg g-1 in this first evaluation indicating that, although were found some PAHs concentrations above the established values by CONAMA and CETESB, this area still remains preserved. Pyrene was the compound that had the highest concentrations at different collecting points (1.11±0.03 and 1.09±0.02 μg g-1). Although were observed some PAHs concentrations above the established values by CONAMA and CETESB, the area is preserved. The study will provide previous information on PAHs concentrations in the area of the enterprise, providing information for the environmental impact study after the construction of the enterprise.

    Palavras-Chave: concentration ratio; construction; ecological concentration; environmental impacts; environmental protection; nuclear facilities; polycyclic aromatic hydrocarbons; research reactors; sediments

  • IPEN-DOC 24091

    FRANÇA, FERNANDA C.S.S.; TICIANELLI, REGINA B. ; MOREIRA, EDSON G. ; GENEZINI, FREDERICO A. ; ALBUQUERQUE, ADRIANA M. de A.; SILVEIRA, PATRICIA B. da; BARBOSA, JONNAS T. de L.; ALMEIDA, AMANDA C. de; HONORATO, ELIANE V.; HAZIN, CLOVIS A.. Determination of REEs in agricultural soils of pernambuco by the neutron activation technique. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The indiscriminate use of phosphate fertilizers causes adverse effects on biota, mainly due to the contaminants present in the rocks used in their manufacture. Among these contaminants, stand out the Rare Earth Elements (REEs) because of the significant increase in the use in several technological areas, such as in vehicle catalysts and also in fertilizer enrichment. In order to evaluate the levels of La, Sm, Nd, Yb and Lu by the Instrumental Neutron Activation Analysis (INAA), the present study aims to survey the ETRs in agricultural soils in Pernambuco/Brazil. For this study, 120 soil samples with a depth of 20 cm were collected in the main vegetable producing regions of the Metropolitan Region of Recife (RMR), evaluating organic and conventional crops with and without influenced by automotive vehicles. The results obtained when compared to the Netherlands reference values defined by the National Institute of Health and Environment (RIVM). The results were higher in all points for La (35 mg.kg-¹ at 85 mg.kg-¹) Yb, (4 mg.kg-¹ at 11 mg.kg-¹) and Lu (0.3 mg.kg-¹ at 0.7 mg.kg-¹ at 4 mg.kg-¹). For Nd (9 mg.kg-¹ at 137 mg.kg-¹) the concentrations were above the values reported by RIVM in 4 points. Comparing the types of crops evaluated with the literature, the results are found was above for all elements analyzed. It may be related to the increase in the use of phosphate fertilizers. However, in environments using smaller amounts of additives, the results were also significant and the more detailed studies are needed to evaluate other possible contamination pathways.

    Palavras-Chave: activity levels; agriculture; crops; ecological concentration; elements; irradiation; neutron activation analysis; rare earths; soils; thermal neutrons; vehicles

  • IPEN-DOC 24050

    SANTOS, LAISSA A.B. dos ; DAMATTO, SANDRA R. . Determination of the 226Ra, 228Ra AND 210Pb concentrations in the mineral water springs from water parks of Cambuquira and Marimbeiro, Minas Gerais and assessment of the committed effective doses. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Due to the importance of human life, water quality must be controlled and a very important parameter are the limits of the natural radioactivity of the water consumed.In relation to therapeutic practices based on water intake the radionuclides 210Pb , 226Ra and 228Ra when present, are of great importance because they contribute to the internal irradiation of individuals.The study areas of the present work were the Parque das águas of Cambuquira and Marimbeiro, located in Minas Gerais. Hence, the objective of this work was to determine the 226Ra, 228Ra and 210Pb concentrations in the springs of these parks and evaluate the committed effective doses due to its consumption.The radionuclides were determined by a radiochemical procedure in four collections at different seasons of the year. The Concentrations ranged from 4 ± 1 mBq / L to 509 ± 32 mBq / L for 226Ra, from 3.7 ± 0.1 mBq / L to 631 ± 27 mBq / L for 228Ra and 5 ± 1 mBq / L to 60 ± 5 mBq / L for 210Pb. The dose for adults from 1.21x10-01 mSv/y for 226Ra, 3.18x10-01 mSv/y for 228Ra and for 210Pb 3.02x10-02 mSv/y.

    Palavras-Chave: concentration ratio; dose commitments; dose equivalents; ecological concentration; lead 210; natural radioactivity; radon 226; radon 228; water springs

  • IPEN-DOC 27935

    SANTOS, THIAGO O. ; CARMO, AMANDA P. ; GONÇALVES, PEDRO N. ; DAMATTO, SANDRA R. . Determination of the natural radionuclides 226Ra, 228Ra and 210Pb activity concentrations in the mineral waters from the cities of Monte Alegre do Sul and Socorro, SP. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 42-49.

    Abstract: The use of mineral water for medical treatment is widespread throughout the world, and several mineral water springs have considerable concentrations of natural radionuclides from the 238U and 232Th series. The estimate of probable adverse effects on human health that may occur because of the ingestion or inhalation of radioactive substances present in these waters is relevant in Radiological Protection. The objective of this study was to determine the activity concentrations of the radionuclides 226Ra, 228Ra and 210Pb in the mineral water springs of Monte Alegre do Sul and Socorro, cities of the Paulista Water Circuit, collected in the seasons of summer, autumn, winter and spring of 2018; these cities have several mineral water springs distributed in many parts of them. The activity concentrations for the mineral waters from Monte Alegre do Sul ranged for 226Ra from limit detection of 2.2 ± 0.2 mBq L-1 to 23.0 ± 0.2 mBq L-1 , from limit detection of 3.7 ± 0.1 mBq L-1 to 16.0 ± 0,8 mBq L-1 for 228Ra and for 210Pb from the limit detection of 4.9 ± 0.4 mBq L-1 to 58 ± 5 mBq L -1 ; for Socorro ranged from limit detection of 2.2 ± 0.2 mBq L-1 to 11.0 ± 0.9 mBq L-1 for 226Ra, from limit detection of 3.7 ± 0.1 mBq L-1 to 48 ± 3 mBq L-1 for 228Ra and for 210Pb from limit detection of 4.9 ± 0.4 mBq L-1 to 49 ± 4 mBq L -1 .

    Palavras-Chave: natural radioactivity; radium isotopes; radium 226; radium 228; lead 210; ecological concentration; drinking water; minerals

  • IPEN-DOC 22642

    JESUS, SUELI C. de ; CHIRINOS, HUGO. Distribuição de sup(226)Ra e sup(228)Ra em águas subterrâneas da região sul do Estado de São Paulo / Distribution of sup(226)Ra e sup(228)Ra in underground water into the south region of São Paulo State. Periódico Tchê Química, v. 8, n. 16, p. 74-79, 2011.

    Abstract: Estudos de monitoração dos radionuclídeos naturais no meio aquático são muito importantes para garantir seu controle em níveis aceitáveis, que não prejudiquem o meio ambiente e o ser humano. Neste trabalho foram analisadas as concentrações de isótopos naturais de 226Ra e 228Ra em águas subterrâneas localizadas em Cananéia, Iguape e Ilha Comprida, na região sul do Estado de São Paulo, através do método de contagem de alfa e beta total. Foram observadas concentrações de 226Ra variando de 0,80 a 23 mBqL-1 em Abril/2009 (período chuvoso) e 0,63 a 12 mBqL -1em Agosto/2009 (período seco). As concentrações de 228Ra variaram de 18 a 39 mBqL-1 em Abril/2009 e 15 a 72 mBqL-1 em Agosto/2009. As razões das atividades 228Ra/226Ra estiveram no intervalo de 3,3 a 31,7 no período chuvoso e 1,1 a 26,7 no período seco. A comparação dos valores de 226Ra e 228Ra obtidos evidenciaram uma predominância da atividade do isótopo de 228Ra. As doses calculadas não excederam o nível de referência de dose efetiva comprometida recomendada pela Organização Mundial de Saúde (WHO).

    Palavras-Chave: brazil; distribution; radium 226; radium 228; underground; water; radioisotopes; radium; abundance; concentration ratio; ecological concentration

  • IPEN-DOC 27915

    BOIANI, NATHALIA F. ; GARCIA, VANESSA S.G. ; BORRELY, SUELI I. . Electron beam irradiation of combined pharmaceuticals: propranonol and fluoxetine and related ecotoxicity. Brazilian Journal of Radiation Sciences, v. 9, n. 1A, p. 1-12, 2021. DOI: 10.15392/bjrs.v9i1A.1575

    Abstract: There are serious evidences that justify the search for treatment technologies or processes combination for the improvement of decomposition for dozens of pharmaceuticals in wastewaters. Electron beam irradiation may play an important role in this scenario and relatively low doses have been reported for such purposes. The aim of the present study was to evaluate the toxic response of the crustacean Daphnia similis exposed to individual and combined pharmaceuticals, before and after electron beam irradiation treatment. Several experimental trials of an acute immobilization test were performed with a mixture of pharmaceuticals composed of fluoxetine hydrochloride (Prozac®), and propranolol. Single pharmaceuticals were first tested separately. Toxicity of binary mixture was then assessed using five concentrations and five percentages of each substance in the mixture (0, 25, 50, 75, and 100%). Acute EC50% values ranged from 5.0 to 7.4 for fluoxetine and from 11.3 to 13.7 for propranolol. In mixture, values ranged from 6.4 to 9.8. Fluoxetine was more toxic than propranolol for D.similis. The different pharmaceuticals concentrations employed in a mixture showed no difference in toxicity values. When electron beam irradiation was applied, approximately 80% of acute effects were reduced at 5 kGy, and the mixture containing a higher percentage of fluoxetine, also showed a greater reduction of toxicity.

    Palavras-Chave: ecological concentration; crustaceans; environmental effects; environmental protection; waste water; irradiation; toxicity

  • IPEN-DOC 26168

    BOIANI, NATHALIA F. ; VILLARDI, BRUNO D.Q. ; GARCIA, VANESSA S.G. ; BORRELY, SUELI I. . Electron beam irradiation of combined pharmaceuticals: propranonol and fluoxetine and related ecotoxicity. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 641-649.

    Abstract: There are serious evidences that justify the search for treatment technologies or processes combination for the improvement of decomposition for dozens of pharmaceuticals in wastewaters. Electron beam irradiation may play an important role in this scenario and relatively low doses have been reported for such purposes. The aim of the present study was to evaluate the toxic response of the crustacean Daphnia similis exposed to individual and combined pharmaceuticals. Several experimental trials of an acute immobilization test were performed with a mixture of pharmaceuticals composed of fluoxetine hydrochloride (Prozac®), and propranolol. Single pharmaceuticals were first tested separately. Toxicity of binary mixture was then assessed using five concentrations and 5 percentages of each substance in the mixture (0, 25, 50, 75, and 100%). Acute EC50% values ranged from 5.0 to 7.4 for fluoxetine and from 11.3 to 13.7 for propranolol. In mixture, values ranged from 6.4 to 9.8. Fluoxetine was more toxic for D.similis than propranolol. The different pharmaceuticals concentrations employed in a mixture showed no difference in toxicity values. When electron beam irradiation was applied, approximately 80% of acute effects were reduced at 5 kGy, and the mixture containing a higher percentage of fluoxetine, also showed a greater reduction of toxicity.

    Palavras-Chave: aqueous solutions; drugs; ecological concentration; electron beams; environmental effects; environmental protection; irradiation; toxicity; waste water

  • IPEN-DOC 23561

    KINOSHITA, ANGELA; GHILARDI, ALINE M.; FERNANDES, MARCELO A.; FIGUEIREDO, ANA M.G. ; BAFFA, OSWALDO. Electron spin resonance dating of toxodon tooth from upper Ribeira Valley, São Paulo, Brazil. Radiation Protection Dosimetry, v. 172, p. 296-301, 2016. DOI: 10.1093/rpd/ncw195

    Abstract: Electron spin resonance (ESR) dating was applied to date a sample of fossil tooth found in Ribeira Valley, São Paulo, Brazil. This region is characterized by abundant fossil records of Pleistocene–Holocene South American megafauna belonging to different faunistic moments related to climate changes during the quaternary. As the number of fossils dated is not too large, the dating of materials from this region will provide important information to better understand the events associated with the presence and extinction of these species. The equivalent dose (De) was determined using single exponential fitting resulting in (24 ± 1)Gy. The De was converted to age using ROSY ESR Dating program and the concentration of radioisotopes present in the sample and soil determined through neutron activation analysis. The ages cover the range of 25–34 ka. This information is important to contextualize other findings in the region from different sites and to help obtain better information about the climate changes in this region.

    Palavras-Chave: age estimation; climatic change; concentration ratio; dose equivalents; ecological concentration; electron spin resonance; fossils; neutron activation analysis; radioisotopes; spin; teeth; valleys; brazil

  • IPEN-DOC 21110

    AMBROGI, JESSICA B. ; GOMES, BRUNA G. ; AVEGLIANO, ROSEANE P. ; MAIHARA, VERA A. . Essential elements in different types of EGGS by neutron activation analysis. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 12th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 19th; MEETING ON NUCLEAR INDUSTRY, 4th, October 4-9, 2015, São Paulo, SP. Proceedings... 2015.

    Palavras-Chave: boiling; concentration ratio; ecological concentration; eggs; elements; irradiation; neutron activation analysis; neutron flux; radiation effects

  • IPEN-DOC 25767

    PEREZ, C. ; SANTOS, E.C. ; SAIKI, M. . Establishing adequate conditions for mercury determination in environmental samples by INAA. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-18, 2019. DOI: 10.15392/bjrs.v7i2A.575

    Abstract: Mercury (Hg) is a toxic element released into the environment mainly by anthropic activities. Consequently, the improvement for Hg determination in environmental samples is of great interest. Instrumental Neutron Activa-tion Analysis (INAA) is considered an adequate method to determine several elements. However, Hg determina-tion by INAA is often hampered by its volatility, which causes losses, depending on the local temperature in the reactor where the sample is irradiated. The aim of this study was to establish adequate irradiation conditions in the IEA-R1 reactor for Hg determination in environmental samples by INAA. The following parameters were evaluated: irradiation time, container for irradiation and spectral gamma ray interferences. For the study, ali-quots of certified reference materials (CRMs) and tree bark samples were irradiated together with Hg synthetic standard at the IEA-R1 nuclear research reactor. Gamma ray activities of 197Hg and 203Hg were measured in a spectrometer coupled to a HPGe detector. Obtained results indicated that polyethylene capsules or envelopes can be used as container for sample irradiation and the Hg impurities in these containers were negligible. Irradiation time of one hour was adequate for Hg determination and in long irradiations of 8 h problems of spectral inter-ference of 198Au and 75Se were observed. In addition, Hg loss during the irradiation of 1 h and after irradiation was not observed. Quality control of Hg results, obtained in the CRMs analyses using one hour of irradiation, indicated good precision and accuracy with HORRAT < 2 and |Z score| < 2. The experimental conditions estab-lished in this study were applied to tree bark samples. Detection limits in these analyses were between 0.14 and 1.9 μg g-1.

    Palavras-Chave: neutron activation analysis; mercury 197; mercury 203; high-purity ge detectors; irradiation; ecological concentration; iear-1 reactor

  • IPEN-DOC 24162

    PEREZ, CAROLINE ; SANTOS, ELIANE C. ; SAIKI, MITIKO . Establishing adequate conditions for mercury determination in environmental samples by INAA. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Palavras-Chave: ecological concentration; gamma radiation; high-purity ge detectors; irradiation; mercury 197; mercury 203; neutron activation analysis

  • IPEN-DOC 21969

    SANTOS, ELIANE C. dos ; SAIKI, MITIKO . Estudo sobre a aplicabilidade de cascas de árvore no biomonitoramento da poluição atmosférica. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO CIENTÍFICA, 20.; PROGRAMA DE BOLSAS E INICIAÇÃO CIENTÍFICA CNEN, 11.; PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIAÇÃO DESENVOLVIMENTO TECNOLÓGICO E INOVAÇÃO, 4., 22-23 de outubro, 2014, São Paulo, SP. Resumo expandido... 2014. p. 110-111.

    Palavras-Chave: uses; trees; monitoring; air pollution monitoring; neutron activation analysis; chemical analysis; sensitivity; ecological concentration; bark

  • IPEN-DOC 24067

    MENDES, SEYNA U.R.; VASCONCELLOS, MARINA B.A. ; CATHARINO, MARILIA G.M. ; QUINAGLIA, GILSON A.; HELD, BARBARA. Evaluation of mercury levels in hair of children resident in artisanal gold mining area in the city of Chapada de Natividade-Tocantins. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: The objective of the work is to evaluate the mercury exposure of children living in an artisanal gold mining area and in a control area, without mining. A cross-sectional study was conducted with children living in the municipalities of Chapada de Natividade and Porto Nacional, in the State of Tocantins, where hair samples were collected for laboratorial analysis of mercury concentrations, comparing between municipalities, gender, monthly fish consumption, profession of parents and the presence of amalgam in dental restorations. The hair samples were analyzed by the methods of neutron activation analysis and also by means of the DMA (Direct Mercury Analyzer) equipment, in the last case being a partnership with CETESB. There was no evidence of mercury-related diseases in the studied children. The mean concentration of mercury in children in Chapada de Natividade was significantly higher than in Porto Nacional. Children exposed to artisanal gold mining areas have higher concentrations of mercury than children living in non- artisanal gold mining areas. There was no significant relationship between mercury concentrations and gender, monthly fish consumption, parental profession and amalgam presence in dental restorations. The results suggest that the children living in an area exposed to mining experience greater environmental exposure to mercury, regardless of their eating habits or gender.

    Palavras-Chave: children; concentration ratio; cross sections; ecological concentration; gold; hair; mercury; mining; neutron activation analysis

  • IPEN-DOC 27879

    ISHIMARU, G. ; SANTOS, E.C. ; SAIKI, M. . Evaluation of the spatial variability of the elements in tree barks used as biomonitors of atmospheric pollution. Brazilian Journal of Radiation Sciences, v. 9, n. 1A, p. 1-13, 2021. DOI: 10.15392/bjrs.v9i1A.1386

    Abstract: Tree barks have proven to be a valuable source of information on air quality. Nowadays, studies with this biomonitor are constantly being developed. However, data of several factors that affect the accumulation of the pollutants in the barks, such as bark porosity, duration of the deposition on the bark and dispersion or variability of pollutants in a defined area, are scarce in the literature. The aim of this study was to evaluate the spatial variability of chemical elements concentrations accumulated on Sibipiruna (Cenostigna pluviosarum) barks in order to examine their aerial dispersion in two small urban areas of the Metropolitan Area of São Paulo. The neutron activation analysis (NAA) applied in the analyses consisted of irradiation the aliquots of the sample together the synthetic element standards at the IEA-R1 nuclear reactor. Concentrations of the As, Br, Ca, Co, Cr, Cs, Fe, K, La, Mn, Rb, Sb, Sc, V and Zn were determined in tree barks using short and long irradiations. Results obtained in the analyses of the tree bark samples indicated that the variability of element concentrations depends on the element, study area and numbers of trees. The variability of element concentrations in general was higher for elements presenting low concentrations. Quality control of the analytical results was evaluated by the analysis of INCT-MPH-2 Mixed Polish Herbs Certified Reference Material and these results presented good accuracy with values of standardized difference or |ζ score| ≤ 2, indicating that the procedure of NAA applied is suitable for the analyses.

    Palavras-Chave: air pollution monitoring; bark; biological markers; concentration ratio; ecological concentration; elements; neutron activation analysis; trees

  • IPEN-DOC 20588

    SANTOS, SANTIAGO S.; MADUAR, MARCELO F. ; MIRANDA JUNIOR, PEDRO. Gamma-ray emitter radionuclides in soils from an Institute of Technology Campus in São Paulo City. In: INTERNATIONAL NUCLEAR CHEMISTRY CONGRESS, 4th, September 14-19, 2014, Maresias, SP. Abstract... 2014. p. 301.

    Palavras-Chave: brazil; soils; contamination; sample preparation; radium 226; radium 228; lead 210; potassium 40; ecological concentration; gamma spectroscopy; high-purity ge detectors

  • IPEN-DOC 27127

    BORDON, ISABELLA C.; JOVIANO, WILLIAN R.; MEDEIROS, ALINE M.Z. de; CAMPOS, BRUNO G. de; ARAUJO, GIULIANA S. de; GUSSO-CHOUERI, PALOMA K.; PRETO, MAYRA de F.; FAVARO, DEBORAH I.T. ; ABESSA, DENIS M. de S.. Heavy metals in tissues of blue crabs Callinectes danae from a subtropical protected estuary influenced by mining residues. Bulletin of Environmental Contamination and Toxicology, v. 104, n. 4, p. 418-422, 2020. DOI: 10.1007/s00128-020-02815-y

    Abstract: This short note aims to report in detail a preliminary assessment of the concentrations of Cd, Hg and Pb in tissues of blue crabs Callinectes danae collected from the Cananéia-Iguape-Peruíbe estuarine complex (CIP), in the South of São Paulo State coast, Brazil. In October 2014, blue crabs were collected from CIP. Tissues were removed by dissection and metal determination was performed by GF-AAS and CV-AAS. According to statistical analysis, Pb and Cd concentrations in gills were significantly higher than those found in muscles and hepatopancreas, respectively. There were no significant differences in Hg concentrations between samples. Cd, Hg and Pb concentrations in gills and hepatopancreas were lower than those reported in a previous study performed at CIP. However, Cd concentration in hepatopancreas was higher than the Brazilian limit for consumption and new efforts to monitor Cd concentrations in C. danae tissues must be performed.

    Palavras-Chave: crabs; environmental impacts; heavy metals; cadmium; mercury; lead; estuaries; aquatic ecosystems; mineral industry; mining; mines; water pollution; toxicity; ecological concentration; environment

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A pesquisa apresentará melhor resultado selecionando um dos filtros disponíveis em Navegar

Os filtros disponíveis em Navegar tais como: Coleções, Ano de publicação, Títulos, Assuntos, Autores, Revista, Tipo de publicação são autoexplicativos. O filtro, Autores IPEN apresenta uma relação com os autores vinculados ao IPEN; o ID Autor IPEN diz respeito ao número único de identificação de cada autor constante no RD e sob o qual estão agrupados todos os seus trabalhos independente das variáveis do seu nome; Tipo de acesso diz respeito à acessibilidade do documento, isto é , sujeito as leis de direitos autorais, ID RT apresenta a relação dos relatórios técnicos, restritos para consulta das comunidades indicadas.

A opção Busca avançada utiliza os conectores da lógica boleana, é o melhor recurso para combinar chaves de busca e obter documentos relevantes à sua pesquisa, utilize os filtros apresentados na caixa de seleção para refinar o resultado de busca. Pode-se adicionar vários filtros a uma mesma busca.

Exemplo:

Buscar os artigos apresentados em um evento internacional de 2015, sobre loss of coolant, do autor Maprelian.

Autor: Maprelian

Título: loss of coolant

Tipo de publicação: Texto completo de evento

Ano de publicação: 2015

Para indexação dos documentos é utilizado o Thesaurus do INIS, especializado na área nuclear e utilizado em todos os países membros da International Atomic Energy Agency – IAEA , por esse motivo, utilize os termos de busca de assunto em inglês; isto não exclui a busca livre por palavras, apenas o resultado pode não ser tão relevante ou pertinente.

95% do RD apresenta o texto completo do documento com livre acesso, para aqueles que apresentam o significa que e o documento está sujeito as leis de direitos autorais, solicita-se nesses casos contatar a Biblioteca do IPEN, bibl@ipen.br .

Ao efetuar a busca por um autor o RD apresentará uma relação de todos os trabalhos depositados no RD. No lado direito da tela são apresentados os coautores com o número de trabalhos produzidos em conjunto bem como os assuntos abordados e os respectivos anos de publicação agrupados.

O RD disponibiliza um quadro estatístico de produtividade, onde é possível visualizar o número dos trabalhos agrupados por tipo de coleção, a medida que estão sendo depositados no RD.

Na página inicial nas referências são sinalizados todos os autores IPEN, ao clicar nesse símbolo será aberta uma nova página correspondente à aquele autor – trata-se da página do pesquisador.

Na página do pesquisador, é possível verificar, as variações do nome, a relação de todos os trabalhos com texto completo bem como um quadro resumo numérico; há links para o Currículo Lattes e o Google Acadêmico ( quando esse for informado).

ATENÇÃO!

ESTE TEXTO "AJUDA" ESTÁ SUJEITO A ATUALIZAÇÕES CONSTANTES, A MEDIDA QUE NOVAS FUNCIONALIDADES E RECURSOS DE BUSCA FOREM SENDO DESENVOLVIDOS PELAS EQUIPES DA BIBLIOTECA E DA INFORMÁTICA.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

1. Portaria IPEN-CNEN/SP nº 387, que estabeleceu os princípios que nortearam a criação do RDI, clique aqui.


2. A experiência do Instituto de Pesquisas Energéticas e Nucleares (IPEN-CNEN/SP) na criação de um Repositório Digital Institucional – RDI, clique aqui.

O Repositório Digital do IPEN é um equipamento institucional de acesso aberto, criado com o objetivo de reunir, preservar, disponibilizar e conferir maior visibilidade à Produção Científica publicada pelo Instituto, desde sua criação em 1956.

Operando, inicialmente como uma base de dados referencial o Repositório foi disponibilizado na atual plataforma, em junho de 2015. No Repositório está disponível o acesso ao conteúdo digital de artigos de periódicos, eventos, nacionais e internacionais, livros, capítulos, dissertações, teses e relatórios técnicos.

A elaboração do projeto do RI do IPEN foi iniciado em novembro de 2013, colocado em operação interna em julho de 2014 e disponibilizado na Internet em junho de 2015. Utiliza o software livre Dspace, desenvolvido pelo Massachusetts Institute of Technology (MIT). Para descrição dos metadados adota o padrão Dublin Core. É compatível com o Protocolo de Arquivos Abertos (OAI) permitindo interoperabilidade com repositórios de âmbito nacional e internacional.

O gerenciamento do Repositório está a cargo da Biblioteca do IPEN. Constam neste RI, até o presente momento 20.950 itens que tanto podem ser artigos de periódicos ou de eventos nacionais e internacionais, dissertações e teses, livros, capítulo de livros e relatórios técnicos. Para participar do RI-IPEN é necessário que pelo menos um dos autores tenha vínculo acadêmico ou funcional com o Instituto. Nesta primeira etapa de funcionamento do RI, a coleta das publicações é realizada periodicamente pela equipe da Biblioteca do IPEN, extraindo os dados das bases internacionais tais como a Web of Science, Scopus, INIS, SciElo além de verificar o Currículo Lattes. O RI-IPEN apresenta também um aspecto inovador no seu funcionamento. Por meio de metadados específicos ele está vinculado ao sistema de gerenciamento das atividades do Plano Diretor anual do IPEN (SIGEPI). Com o objetivo de fornecer dados numéricos para a elaboração dos indicadores da Produção Cientifica Institucional, disponibiliza uma tabela estatística registrando em tempo real a inserção de novos itens. Foi criado um metadado que contém um número único para cada integrante da comunidade científica do IPEN. Esse metadado se transformou em um filtro que ao ser acionado apresenta todos os trabalhos de um determinado autor independente das variáveis na forma de citação do seu nome.