REPOSITÓRIO DIGITAL DA PRODUÇÃO TÉCNICO CIENTÍFICA

 

 

 

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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. [Saiba mais]

 

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  • IPEN-DOC 25894

    ROVANI, S. ; SANTOS, J.J.; CORIO, P.; FUNGARO, D.A. . Low cost silica nanoparticles biosorbent obtained from sugarcane waste ash: characterization and adsorption study of methylene blue dye. In: ENCONTRO BRASILEIRO SOBRE ADSORCAO, 12., 23-25 de abril, 2018, Gramado, RS. Anais... 2018.

    Abstract: Sugarcane waste ash, a Si-rich source, is generated in large quantity and can create a serious disposal problem. The production of silica nanoparticles (silicaNPs) from sugarcane waste ash varying ash:NaOH mass ratio was evaluate. The samples were characterized by total X-ray fluorescence spectroscopy, SEM, TEM, XRD, surface area and pore distribution, FTIR and TGA and applied as biosorbent for methylene blue dye removal. The yield of silicaNPs extraction remained constant from ash:NaOH mass ratio 1:1.5. Si content was 77.32 wt.% and 94.89wt. % for sugarcane waste ash and silicaNP 1:1.5, respectively. SilicaNP 1:1.5 presented particles smaller than 100 nm, surface area of 63 m2 g-1 and adsorption capacity of 37 mg g-1 for methylene blue. The results indicate that was possible to obtain a biosorbent, from a renewable source, with low cost and with easy and fast synthesis procedure.

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  • IPEN-DOC 25893

    CARVALHO, PATRICIA R. ; MUNITA, CASIMIRO S. . Estudos arqueométricos de cerâmicas sul-americanas. Revista da Universidade Ibirapuera, v. 16, p. 52-62, 2018.

    Abstract: As análises realizadas neste trabalho têm como objetivo contribuir com a discussão sobre os materiais utilizados na fabricação, a tecnologia de produção e a idade de objetos cerâmicos de antigas civilizações sul- -americanas. Para isso, quarenta e seis fragmentos de cerâmica de cinco sítios arqueológicos de Cusco, Peru, foram analisados utilizando INAA para determinar a fração de massa de 20 elementos químicos (Na, K, La, Nd, Sm, Yb, Lu, U, Sc, Cr, Fe, Co, Rb, Cs, Ce, Eu, Tb, Hf, Ta e Th). Três métodos estatísticos multivariados, análise de agrupamentos, análise discriminante e gráfico bivariado, foram aplicados no conjunto de dados. Pela análise de agrupamentos encontraram-se três grupos de amostas de composição química similar, os quais, por meio da análise discriminante e do gráfico bivariado, foi possível confirmar que foram classificados corretamente. Os resultados mostram que as amostras foram fabricadas com 3 diferentes fontes de matéria- -prima. O estudo da datação por TL mostrou que os três grupos de amostras estão de acordo com os três períodos do Império Inca. Ademais, o estudo da temperatura de queima realizada pela EPR mostrou que era inferior a 600 °C.

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  • IPEN-DOC 25880

    BORDON, ISABELLA C.; CAMPOS, BRUNO G. de; GUSSO‑CHOUERI, PALOMA K.; MIYAI, CAIO A.; ARAUJO, GIULIANA S. de; EMERENCIANO, ANDREWS K.; SILVA, JOSE R.M.C. da; COTRIM, MARYCEL E.B. ; FAVARO, DEBORAH I.T. ; ABESSA, DENIS M. de S.. Improvements in metal exposure assays: artificial food to assess bioaccumulation in the blue crab Callinectes danae Smith, 1869 (Crustacea, Decapoda, Portunidae). International Journal of Environmental Research, v. 13, n. 2, p. 431-434, 2019. DOI: 10.1007/s41742-019-00170-3

    Abstract: This technical note aims to report, in detail, the development, suitability and analytical validation of an artificial food to assess metal bioaccumulation in the blue crab Callinectes danae after metal exposure assays. For this purpose, lead (Pb) was chosen as the metal of interest. First, a non-contaminated artificial food was prepared by mixing commercial shrimps and agarose. The food was then offered on alternate days to two groups of crabs for 7 and 14 days, respectively. After confirming that this food was well-accepted by crabs, analytical procedures were performed to confirm that Pb added to the mixture would remain in the artificial food. For this purpose, two foods containing Pb at concentrations of 0.5 and 2.0 μg g− 1 were prepared by adding aliquots of an ultrapure Pb standard solution to the mixture. Samples of each food were subjected to an acid extraction and Pb concentrations were determined by a GF-AAS. Pb recoveries in both contaminated foods were > 90%. Subsequently, another experiment was performed, and two groups of crabs were fed with contaminated artificial foods (0.5 and 2.0 μg g− 1 of Pb) during 7 and 14 days, respectively. The observed acceptance of these foods by crabs at both Pb concentrations was of 100%.

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  • IPEN-DOC 25790

    SIMÕES, MARTA F.; MAIORANO, ALFREDO E.; SANTOS, JONAS G. dos; PEIXOTO, LUCIANA; SOUZA, RODRIGO F.B. de ; OLIVEIRA NETO, ALMIR ; BRITO, ANTONIO G.; OTTONI, CRISTIANE A.. Microbial fuel cell‑induced production of fungal laccase to degrade the anthraquinone dye Remazol Brilliant Blue R. Environmental Chemistry Letters, v. 17, n. 3, p. 1413-1420, 2019. DOI: 10.1007/s10311-019-00876-y

    Abstract: The anthraquinone dye Remazol Brilliant Blue R is largely used in the textile industry. However, its removal from wastewaters is costly and complex. Many methods have been tested to solve this ecological problem, but there is still a need for efficient methods. We propose here an alternative use of a two-chambered microbial fuel cell (MFC), fuelled with domestic wastewater in the anodic chamber, to degrade a simulated textile dye effluent made of Remazol Brilliant Blue R inoculated with an immobilised fungal strain, Pleurotus ostreatus URM 4809, as a laccase producer, in the cathodic chamber. The MFC showed continuous synthesis of laccase in the cathodic chamber, which, in turn, promoted the rapid decolourisation, of more than 86% of the textile dye effluent. The yield was further increased by the addition of glycerol. Electrochemical monitoring also indicated an increase in power density and current density. After 20 days of MFC operation, 62.1% of organic matter was removed in the anodic compartment, thus leaving the effluent with a much lower toxicity.

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  • IPEN-DOC 25892

    VILLANI, D. ; CAMPOS, L.L. . Aplicação da técnica de Luminescência Opticamente Estimulada (OSL) na monitoração de área de uma sala de exame de mamografia. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 139-147, DOI: 10.14195/978-989-26-1602-5

    Abstract: O objetivo deste trabalho é avaliar o desempenho dos dosímetros OSL nanoDot™ para a monitoração de área de uma sala de mamografia. Os testes foram realizados primeiramente em laboratório, para caracterização dosimétrica, avaliação da repetibilidade e estabilidade do sistema utilizado e, posteriormente, na sala de mamografia para avaliar as doses dispersas no ambiente, bem como a dose de entrada na pele. Os resultados mostraram que os nanoDots™ apresentam boa repetibilidade e estabilidade tanto nos testes laboratoriais como nos de campo, o que permite sua aplicação na dosimetria de área.

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  • IPEN-DOC 25891

    BRAVIM, A. ; SAKURABA, R.K.; CAMPOS, L.L. . Avaliação de dosímetros OSL na determinação de curvas de isodose de uma simulação de planejamento de tratamento de vértebra com proteção da medula espinhal utilizando VMAT. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 111-120, DOI: 10.14195/978-989-26-1602-5

    Abstract: O objetivo deste trabalho foi avaliar a aplicabilidade de dosímetros e microdosimetros OSL de LiF:Mg,Ti (TLD-100) na determinação das curvas de isodose em planejamentos utilizando a técnica de VMAT. Foi simulado um planejamento de tratamento de vértebra com proteção da medula espinhal em que a dose média absorvida obtida através dos dosímetros OSL apresentou uma variação máxima de 3,85% em relação aos valores calculados pelo sistema de planejamento Eclipse 11.0. A variação entre o intervalo de dose obtido com o emprego dos dosímetros OSL e fornecido pelo Eclipse 11.0 está de acordo com os limites aceitáveis para a área da radioterapia. Observou-se que, por serem de menor tamanho, os microdosímetros de LiF:Mg,Ti apresentam uma menor probabilidade de estarem posicionados em mais de uma curva de isodose ao mesmo tempo no planejamento. Sendo assim, apresentaram os melhores resultados.

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  • IPEN-DOC 25890

    BRESSANE, R.O. ; VILLANI, D. ; RODRIGUES JUNIOR, O. ; CAMPOS, L.L. . Estudo comparativo de sensibilidade entre os dosímetros fricke xilenol gel e alanina gel. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 85-93, DOI: 10.14195/978-989-26-1602-5

    Abstract: Fricke Xilenol Gel (FXG) é um dosímetro químico bem conhecido e caracterizado. Neste trabalho, foi adicionada alanina ao FXG a fim de obter melhora na sensibilidade. A comparação entre os dois dosímetros permitiu verificar maior estabilidade no gel devido à presença da alanina e aumento do intervalo de linearidade da resposta óptica: de 1 a 30 Gy para 5 a 50 Gy. Foi possível verificar, também, que a variação de cor das amostras após a irradiação é característica de cada tipo de dosímetro e que a sensibilidade do dosímetro com alanina é maior utilizando-se 0,2 mM de alaranjado de xilenol.

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  • IPEN-DOC 25889

    VENEZIANI, G.R. ; RODRIGUES JUNIOR, ORLANDO ; SAKURABA, R.K.; CAMPOS, L.L. . Desenvolvimento de simulador aplicados a radiodiagnostico e radioterapia utilizando impressora 3D. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 77-83, DOI: 10.14195/978-989-26-1602-5

    Abstract: Nesse trabalho foi avaliada a viabilidade do uso de impressora 3D (FDM) e materiais tecido equivalentes para o desenvolvimento de simuladores para serem aplicados em radioterapia e/ou diagnóstico. Os resultados avaliados por CT foram bastante promissores e abrem caminho para o desenvolvimento de simuladores personalizados e de baixo custo.

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  • IPEN-DOC 25888

    VALERIANO, C. ; VENEZIANI, G. ; JUNIOR, O. ; VIVOLO, V. ; SANTOS, W.S.; CAMPOS, L.L. . Determinação dos coeficientes de atenuação para feixes de raios X diagnóstico do PLA e do ABS impressos: uma abordagem por simulação com MCNP5. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 69-76, DOI: 10.14195/978-989-26-1602-5

    Abstract: Modelos 3D de estruturas anatômicas podem ser obtidos por meio de técnicas de imageamento médico (ressonância magnética e tomografia computadorizada). 70 Variando os materiais (por exemplo poliuretano e resina epóxi) utilizados em sua composição, é possível obter o contraste radiográfico ou a equivalência ao tecido desejado. A produção de objetos simuladores para pacientes específicos precisa preencher requisitos como a acurácia geométrica com a anatomia do individuo, a equivalência ao tecido, de modo que possam ser realizar medidas utilizáveis, e não ser susceptível aos efeitos da radiação. A utilização de impressoras 3D é uma forma rápida de construção de objetos complexos, dessa forma é justificável estudar a viabilidade da impressão 3D para desenvolver objetos simuladores. Baseado nesse cenário, o presente trabalho tem como objetivo avaliar a simulação desenvolvida, utilizando MCNP5, como ferramenta para a obtenção dos coeficientes de atenuação das placas feitas com material de impressora 3D.

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  • IPEN-DOC 25887

    CORREA, F. ; SORDI, G. ; LEVY, D.S. . Evolução da filosofia do sistema de limitação de dose e a questão das substituições “superseded”. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 351-361, DOI: 10.14195/978-989-26-1602-5

    Abstract: O grande avanço da era nuclear mostrou que a filosofia do sistema de limitação de dose proposta pela Comissão Internacional de Proteção Radiológica em 1958 e os Limites Anuais Máximos Permissíveis (LAMP), careciam de mudanças, assim, com a atualização das recomendações surgiu uma nova filosofia, ainda vigente, denominada de Limites Anuais Máximos Admissíveis (LAMA) para que possamos estuda-los separadamente, analisando cuidadosamente como surgiram estas filosofias e como foram evoluindo até as suas últimas publicações. 352 Uma vez que cada nova publicação substituía a anterior, e a ICRP e o Organismo Internacional de Energia atômica (IAEA) firmaram o acordo pelo qual este último adotaria a filosofia proposta pela Comissão, houve a possibilidade que algumas destas informações, algumas valiosas, possam ter se perdido no decorrer da substituição da publicação e ou da edição da norma do IAEA na adoção da filosofia. Estas informações são discutidas e estudadas em profundidade e o seu valor real mostrado, levantando a possibilidade de reintroduzi-las nas futuras publicações.

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  • IPEN-DOC 25886

    LEVY, D.S. ; SORDI, G.M.A.A. . Education and communication on radiological protection: the potential value of information technologies to improve profess ional skills. In: NEVES, LUIS (Coord.). Proteção contra radiações na comunidade dos países de língua portuguesa. Coimbra, Portugal: Imprensa da Universidade de Coimbra, 2018. p. 313-325, DOI: 10.14195/978-989-26-1602-5

    Abstract: For operational control of exposures to ionizing radiation in any workplace, the International Commission on Radiation Protection (ICRP) recommends establishing a program of operational radiation protection, proportional to the risk, to ensure the effective management of all necessary measures to satisfy the principle of optimization. This project focus on the potential value of Information and Communication Technologies (ICTs) to enhance education and communication on Radiological Protection throughout Brazil. The content includes optimization programs and monitoring policy and techniques, interrelating 314 information currently scattered in several documents, providing Brazilian facilities a complete repository for consultation and information. The content also brings new approaches from some recommendations, presenting some initiatives towards protection and safety. The growing impact of ICTs shall contribute greatly to provide information where it is needed, stimulating development in this large country where it is a huge challenge to ensure access to information to as many people as possible, minimizing costs and optimizing results.

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  • IPEN-DOC 25885

    SILVA, JULIO C.M. da ; LOPES, THIAGO ; OLIVEIRA NETO, ALMIR ; SPINACE, ESTEVAM V. . Electrocatalysts for direct ethanol fuel cells. In: SANTOS, MAURO C. dos (Ed.). Advanced Materials and Systems for Electrochemical Technologies. Hauppauge, NY, USA: Nova Science Publishers, 2018. p. 27-52, cap. 2.

    Abstract: In this chapter, an overview of electro-catalysts for direct ethanol fuel cells based on polymer electrolyte membranes is presented, with special attention given to the alkaline anion exchange membrane-based devices. Considering the anodic reaction, it is evidenced that a substantial effort has been dedicated towards increasing the fuel cell efficiency by developing electrocatalysts with higher catalytic activity. In this sense, palladium is pointed out as a promising substitute to platinum with regards to electrocatalytic activity, price and element availability. Furthermore, palladium-based nanoparticles are pointed out as the electrocatalysts with the highest electrocatalytic activity for ethanol electro-oxidation in alkaline media. Taking into account the support materials for the electrocatalysts nanoparticles, it was possible to observe an evolution in carbon-based materials, first carbon nanotubes overcame the carbon black, where more recently, graphene is addressed as the best support choice for catalysts nanoparticles. Different efforts have been made to improve the properties of the support materials, such as doping with nitrogen or with metal oxides like TiO2, for example. Considering the cathode materials, the main goal is to develop catalysts with enhanced activity to the oxygen reduction reaction as well as tolerance to ethanol molecules that crossover the electrolyte membrane.

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  • IPEN-DOC 25884

    OTTONI, CRISTIANE A.; SIMÕES, MARTA F.; SANTOS, JONAS G. dos; PEIXOTO, LUCIANA; SOUZA, RODRIGO F.B. de; OLIVEIRA NETO, ALMIR ; BRITO, ANTONIO G. de; MAIORANO, ALFREDO E.. Biotratamento de vinhaça sintética e geração de eletricidade utilizando uma célula a combustível microbiana. In: OLIVEIRA, ANTONELLA C. de (Ed.); SANTOS, ALBERDAN S. (Org.). Avanços Científicos e Tecnológicos em Bioprocessos. Ponta Grossa, PR: Atena Editora, 2018. p. 163-171, cap. 20. DOI: 10.22533/at.ed.475180110

    Abstract: O Brasil é um dos maiores produtores de etanol no mundo, no entanto, durante o processo de obtenção deste combustível, elevadas quantidades de vinhaça são geradas, em média, para cada litro de etanol produzido são gerados 13 litros deste resíduo. A vinhaça possui propriedades físicas e químicas que podem desencadear efeitos nocivos à biota, deste modo, existe um interesse crescente em identificar novas tecnologias para o seu tratamento. A utilização de células a combustível microbianas (CCMs) apresenta um enorme potencial, uma vez que, pode promover simultaneamente o tratamento deste resíduo e a biogeração de energia elétrica, pela conversão da energia química disponível nesses substratos biodegradáveis diretamente em eletricidade, por meio da ação catalítica de bactérias eletrogênicas aderidas ao eletrodo. Neste contexto, o presente estudo avaliou a utilização de uma CCM de câmara dupla no tratamento de vinhaça sintética. Durante a operação deste reator foi detectada uma máxima densidade de potência de 330 mW·m-2 e uma redução na demanda química de oxigênio (DQO) em 58,8% após 28 dias. Diante destes resultados preliminares, a tecnologia CCM pode ser considerada promissora no tratamento da vinhaça, contudo, estudos a respeito da configuração, tipo de inóculo e formas de operação da CCM são necessários para que amplie sua eficiência.

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  • IPEN-DOC 25883

    FUNGARO, DENISE A. ; IZIDORO, JULIANA C. ; GUILHEN, SABINE N. ; SILVA, KATIA C. ; WANG, SHAOBIN. Synthesis of nanocrystalline zeolite Na-A from coal fly ash and different aluminum sources: application for heavy metals removal. In: GRAY, MIRIAM (Ed.). Coal Fly Ash. Hauppauge, NY, USA: Nova Science Publishers, 2018. p. 1-33, cap. 4.

    Abstract: This chapter describes the synthesis process to obtain zeolite Na-A from coal fly ash via fusion with NaOH followed by hydrothermal reaction. Coal fly ash is a low cost source of both silica and alumina. The molar ratio of SiO2/Al2O3 for zeolite 4A formation was achieved by the addition of sodium aluminate solution or aluminum waste from tertiary industry as aluminum sources. The effects of temperature and time at the fusion step and the hydrothermal reaction time on crystalline products were investigated. The synthesized products were studied for their purity and yield as well as were characterized by different techniques such as Xray powder diffraction (XRD), scanning electron microscopy (SEM) and cation exchange capacity (CEC), among others. Analysis of the properties of the raw materials and the products demonstrates that the by-products can be used to produce a high purity zeolite A. The optimum conditions related to the synthesis was set and the samples were pure, highly crystalline and white. The synthesized zeolites were used for both the removal of Cd (II) and Zn (II) from aqueous solution. The results showed that coal fly ash and aluminum source can be transformed into zeolite A, which is considered as value-added material with adsorption properties.

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  • IPEN-DOC 25882

    LINO, JULIANA dos S. ; AQUINO, AFONSO R. de . Análise da evolução das áreas contaminadas no município de São Paulo. In: ANDRADE, DARLY F. (Ed.). Sustentabilidade e Responsabilidade Social em Foco. 1 ed.. Belo Horizonte, MG: Editora Poisson, 2019. p. 51-58, v. 12, cap. 4.

    Abstract: O expressivo surgimento de áreas contaminadas ao redor do globo, especificamente em centros urbanos industrializados, é resultado de processos socioeconômicos sem a percepção da relevância das questões ambientais a eles associadas. O uso e a ocupação do solo das cidades se deram sem o conhecimento de parâmetros de proteção e controle ambiental. O solo era visto como um local seguro para a disposição de rejeitos, um local onde o processo de degradação de contaminantes aconteceria naturalmente. Diante da enorme velocidade com que ocorreu o crescimento metropolitano, só tardiamente o poder público se proveu de instrumentos legais para buscar proteção e ordenação no uso do solo. Somente no final do século XX, a questão das áreas contaminadas começou a ser debatida, estando atualmente associada ao tema da revitalização urbana, buscando conferir novo uso sustentável para essas áreas contaminadas com o objetivo de agregá-las ao tecido urbano, estimulando e possibilitando a requalificação urbana. Essa mudança de postura intensificou o reconhecimento de áreas nas quais se desenvolveram atividades potencialmente poluidoras, ocorridas principalmente em regiões densamente povoadas e industrializadas, e sua reutilização, se feita sem a adoção de critérios adequados pode representar um grave risco para a saúde das populações locais. Uma das características da cidade de São Paulo é o seu grande dinamismo e por ter passado por diversos rearranjos espaciais, ao longo das últimas décadas. Devido o caráter dinâmico da cidade e da importância da identificação efetiva das áreas contaminadas, a fim de que estas sejam refuncionalizadas adequadamente, neste trabalho foram estudados os mecanismos que possibilitam a identificação destas áreas na cidade de São Paulo, associado a uma apreciação da sua evolução histórica. O significativo aumento no número de áreas na cidade de São Paulo não deve ser entendido como um fator negativo. O conhecimento real da situação possibilita que a questão seja tratada de forma assertiva. É importante conhecer a dimensão do problema para que a solução desenvolvida abranja todas as suas dimensões.

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  • IPEN-DOC 25881

    NEVES, EDUARDO G. ; MUNITA, CASIMIRO S. ; HAZENFRATZ, ROBERTO; MONGELO, GUILHERME Z.. Ancient exchange networks in the Central Amazon. In: GLASCOCK, MICHAEL D. (Ed.); NEFF, HECTOR (Ed.); VAUGHN, KEVIN J. (Ed.). Ceramics of the Indigenous Cultures of South America. Albuquerque, NM, USA: University of New Mexico Press, 2019. p. 231-239, cap. 22.

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  • IPEN-DOC 25879

    IZIDORO, JULIANA ; FUNGARO, DENISE ; CAMPELLO, FELIPE ; GUILHEN, SABINE . Immobilization agents study of toxic elements in coal ash. In: CASARES, J. (Ed.); PASSERINI, G. (Ed.); PERILLO, G. (Ed.). Environmental Impact IV. Southampton, UK: WIT Press, 2018. p. 387-395, v. 215, (WIT Transactions on Ecology and the Environment). DOI: 10.2495/EID180351

    Abstract: Metal leaching from coal fly ashes into the environment is of a much concern. A series of batch tests were performed to investigate the potential leaching of metals from fly ash modified with organosilane (OS) and quaternary ammonium surfactant (SF). The fly ash was collected at the Figueira Thermal Power Plant, located in the city of Figueira, State of Paraná. Firstly, the influence of ash mass/water volume ratio on the concentration of the elements in the leachates from untreated fly ash was evaluated. Subsequently, the capacities of immobilization of toxic elements by the different immobilizing agents were determined by measuring the pH and conductivity of the leachates from the treated fly ash. A significant reduction in the concentration of the elements was observed for all the leachate samples obtained from the ashes treated with OS. The concentrations were reduced by 89%, 77%, 42% and 11% for Cr, Mo, As and Se, respectively. When SF was used for the ash treatment, the concentration reduction in the leachates was found to be above 60% for all elements. These results show that both the OS and SF can be used as immobilizing agents for the retention of toxic elements presented in coal ashes.

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  • IPEN-DOC 25878

    KOMATSU, L.G.H. ; ZAFALON, A.T. ; SANTOS, V.J. ; LINCOPAN, N.; RANGARI, V.K.; PARRA, D.F. . Application of natural nanoparticles in polymeric blend of HMSPP/SEBS for biocide activity. In: IKHMAYIES, SHADIA (Ed.); LI, JIAN (Ed.); VIEIRA, CARLOS M.F. (Ed.); MARGEM, JEAN I. (Ed.); BRAGA, FABIO de O. (Ed.). Green Materials Engineering. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 79-87, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-10383-5_9

    Abstract: The natural nanoparticles of CaCO3, from eggshell and CaCO3/Ag, were investigated as candidates for biocide nanoparticles in a blend of thermoplastic elastomer, styrene–ethylene/butadiene–styrene (SEBS), and polyolefin, high-meltstrength polypropylene (HMSPP). The nanoparticles with silver (Ag) were synthesized by metal precursor method, and before the application in the polymer matrix, the nanoparticles were analyzed on dynamic lighting scattering (DLS) and Raman spectroscopy. After DLS and Raman analyses, the nanoparticles were evaluated in biocide tests against P. aeruginosa and S. auerus. The aim of this investigation was the blending and the injection molding in dumbbell samples with the nanoparticles. The characterizations were carried out by differential scanning calorimetry (DSC), thermogravimetry analysis,mechanical tests, X-ray diffraction, Raman spectroscopy, scanning electronmicroscopy, and energy-dispersive scanning and biocide tests. Correlation between size and particle distribution on the polymerwas founded. However, samples at higher concentrations (>1 wt%) do not show biocide activity.

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  • IPEN-DOC 25877

    MUNITA, CASIMIRO S. ; GLASCOCK, MICHAEL D.; HAZENFRATZ, ROBERTO . Neutron activation analysis: an overview. In: ATTA-UR-RAHMAN (Ed.); OZKAN, SIBEL A. (Ed.). Recent Advances in Analytical Techniques. Sharjah, UAE: Bentham Science Publishers, 2019. p. 1-46, v. 3, cap. 5. DOI: 10.2174/9781681085722119030007

    Abstract: An overview of neutron activation analysis (NAA) and some applications for this technique are provided in this paper. The fundamentals of the various methods of NAA (INAA, relative, k0, large sample, prompt gamma charge particles, cyclic, molecular and radiochemical NAA) are discussed in order to describe the most important scientific and technical aspects. Several problems associated with the technique are pointed out and briefly discussed. Emphasis is laid on the advantages of this technique for the determination of trace elements in geological, biological and environmental samples as an alternative analytical technique where other methods would not be the best choice.

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  • IPEN-DOC 25876

    MOURA, ESPERIDIANA A.B. . The potential of micro- and nano-sized fillers extracted from agroindustry residues as reinforcements of thermoplastic-based biocomposites: a review. In: IKHMAYIES, SHADIA (Ed.); LI, JIAN (Ed.); VIEIRA, CARLOS M.F. (Ed.); MARGEM, JEAN I. (Ed.); BRAGA, FABIO de O. (Ed.). Green Materials Engineering. Cham, CZ, Switzerland: Springer Nature Switzerland AG, 2019. p. 89-100, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-030-10383-5_10

    Abstract: Currently, the relevance of reuse of agroindustrial waste to obtain fillers in micro- and nano-sizes for the development of biocomposite materials has grown significantly. Production processes based on sustainable and low carbon development have increased interest in more environmentally friendly polymer composites, which have made the origin of reinforcement materials a determining factor for their application in this segment. This work presents a review of the developments of our team in the field of thermoplastic biocomposites reinforced with micro- and nano-sized fillers extracted from agroindustry residues. The different residues from Brazilian agroindustry available for the extraction of micro- and nano-sized fillers for the production of polymer biocomposites, the methods of the extraction and treatments of these natural fillers are presented; and its application as reinforcements in thermoplastic-based biocomposite are discussed in this review.

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  • IPEN-DOC 25875

    ORTIZ, NILCE . EPs antibiotics: photodecomposition and biocarbon adsorption. In: SOLONESKI, SONIA (Ed.). Emerging Pollutants. London, UK: IntechOpen, 2018. p. 79-97, cap. 5. DOI: 10.5772/intechopen.76893

    Abstract: The emerging pollutants (EPs) are considered a global monitoring challenge, present in the environment in very reduced concentrations, and the proper methods for sampling and analysis are still in development. Many published types of research considering the EPs identification only depend on the analytical methodology and a more efficient higher number of EPs. The quantitative determination of the prioritized EPs in water needs advanced and ultra-sensitive instrumental techniques applied in water, water-suspended matter, soil, and biota. The regulatory framework of the water-quality parameters does not often include the microplastics, EPs, and their metabolites; especially, the groundwater water-quality monitoring and control are urgent but not yet achieved. The EPs sources in water are the sewage, industrial, and agricultural waste discard, and the UN estimated that the wastewater produced annually is about 1500 km3, about six times more water than existing in all rivers of the word. In 2015, in China, which has a fast-growing economy, the water is a scarce resource with just 8% of the world’s fresh water to meet the water needs of the 22% of the world’s population.

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  • IPEN-DOC 25874

    SANTOS, SOFIA N. dos; BERNARDES, EMERSON S. ; SANTOS-OLIVEIRA, RALPH. Nanoradiopharmaceuticals in current molecular medicine. In: BARHOUM, AHMED (Ed.); MAKHLOUF, ABDEL S.H. (Ed.). Fundamentals of Nanoparticles. 1 ed.. Amsterdam, Netherlands: Elsevier, 2018. p. 553-569, cap. 18. DOI: 10.1016/B978-0-323-51255-8.00018-5

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  • IPEN-DOC 25873

    ESCANHOELA, CORDELIA M.F.; SABUNDJIAN, GAIANE ; LIMA, ANA C. de S. . Educação ambiental e sustentabilidade: um reator nuclear inovador para o Brasil. Revista Mais Educação, v. 2, n. 2, p. 220-229, 2019.

    Abstract: Este trabalho apresenta um estudo sobre a implementação do reator inovador System - Integrated Modular Advanced Reactor (SMART) no Brasil. Desenvolvido pelo Korea Atomic Energy Research Institute (KAERI) e com potência elétrica de 100MWe, esse reator pode atender a uma demanda de cerca de 100.000 habitantes. A escolha deste reator nuclear inovador está alicerçada, primeiramente, na análise do cenário energético nacional, no qual é demonstrada tanto a necessidade da expansão energética no Brasil quanto na imprescindível escolha de fontes alternativas de energia de maneira a atender as exigências de sustentabilidade e atenuação dos impactos ambientais. Dentro do contexto de complementariedade da matriz energética nacional associada à descentralização da geração de energia elétrica; o projeto envolvendo um reator nuclear pequeno e modular do tipo Power Water Reactor (PWR) prova ser uma escolha assertiva inclusive do ponto de vista econômico, já comprovado por meio de métodos econômicofinanceiros e ainda, pelo aproveitamento da expertise existente no país.

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  • IPEN-DOC 25872

    MELLO-CASTANHO, SONIA R.H. ; MORENO, RODRIGO. Editorial: special issue on green and energy efficient processing. Journal of the European Ceramic Society, v. 39, n. 12, p. 3391-3391, 2019. DOI: 10.1016/j.jeurceramsoc.2019.05.066

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  • IPEN-DOC 25871

    PINTO, JOSE C.; CANEVAROLO, SEBASTIAO ; CARVALHO, ANTONIO J.F. de. Preface. Macromolecular Symposia, v. 383, n. 1, p. 1-1, 2019. DOI: 10.1002/masy.201970004

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  • IPEN-DOC 25870

    SELLERA, FABIO P.; DUTRA, GUSTAVO H.P.; NASCIMENTO, CRISTIANE L.; RODRIGUES, FERNANDA P.; SÁ, LILIAN R.M. de; ALMEIDA-LOPES, LUCIANA; RIBEIRO, MARTHA S. ; POGLIANI, FABIO C.. Investigation of green turtle (Chelonia mydas) cutaneous fibropapillomatosis recurrence rates following diode laser surgery. Journal of Exotic Pet Medicine, v. 28, n. C, p. 180-184, 2019. DOI: 10.1053/j.jepm.2018.10.010

    Abstract: A pilot study was performed to investigate fibropapillomatosis (FP) recurrence rates after 940 nm-diode laser surgeries. Fifteen animals had a total of 274 tumors removed by diode laser. Cutaneous FP recurrence rates were evaluated during a period of 1-year. According to tumor sizes classification, 166 tumors (60.6%) were <1 cm, 67 tumors (24.5%) between 1-4 cm, 31 tumors (11.3%) >4-10 cm and 10 tumors (3.6%) >10 cm. Seven animals (46.6%) were lightly afflicted, 4 (26.7%) moderately, and 4 (26.7%) heavily afflicted. Thirteen animals (86.7%) did not present tumor regrowth and 2 (13.3%) presented small tumors after 1-year.

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  • IPEN-DOC 25869

    SOUZA, ARMANDO C. de; ROSSI, JESUALDO L. ; CIONE, FRANCISCO C. ; MACHADO, NOE G.P. ; SILVA, ALINE C. da; SILVA, WALLACE F. da. Study of a metal-organic composite (Wx%Lig) for the gamma radiation attenuation. Research & Reviews: Journal of Material Sciences, v. 6, n. 4, p. 238-243, 2018. DOI: 10.4172/2321-6212.1000239

    Abstract: The objective of this work was to use tungsten and lignin as precursors to produce a metal-organic composite (Wx%Lig) using different sintering processes. Tungsten is a refractory metal and was selected for the composite due to its superior physical and mechanical properties (mechanical strength, high melting point, and excellent cross section with thermal neutrons). Its choice is also justified because it is widely used for high-energy radiation shielding. Lignin extracted from lignocellulosic biomass was selected to be the organic precursor for the composite because it has multiple applications; it is used in the production of aromatics, adhesives, and as a phenolic resin replacement. Analysis of the composite was performed after sintering processes using a Nexview 3D optical surface profiler and analyse the gamma radiation attenuation coefficient using cobalt source (Co-60). Metal-organic composites in ratios of W5%Lig and W2.5%Lig were produced after different heat treatment processes. Then, the gamma attenuation coefficients of the composite samples in these rations were analysing. The gradient of the attenuation coefficient differed when standard tungsten and the composites of W5%Lig and W2.5%Lig were compared with free source Co-60.

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  • IPEN-DOC 25868

    TEITELBAUM, SUSANA; ANDRADE, DELVONEI A. de ; PAREDES, WILBER E.B. . Perfil de pacientes oncológicos tratados con láser de baja intensidad. Dental Tribune Hispanic & Latin America, v. 15, n. 3, p. 14-19, 2018.

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  • IPEN-DOC 25867

    SILVA, J.O.; CALDAS, L.V.E. . Performance tests of a special ionization chamber for X-rays in mammography energy range. Brazilian Journal of Radiation Sciences, v. 6, n. 2A, p. 1-14, 2018. DOI: 10.15392/bjrs.v6i2%20-%20A.501

    Abstract: A special mammography homemade ionization chamber was developed to be applied for mammography energy range dosimetry. This chamber has a total sensitive volume of 6 cm³ and is made of a PMMA body and graphite coated collecting electrode. Performance tests as saturation, ion collection efficiency, linearity of chamber response versus air kerma rate and energy dependence were determined. The results obtained with this special homemade ionization chamber are within the limits stated in international recommendations. This chamber can be used in quality control programs of mammography energy range. All measurements were carried out at the Calibration Laboratory of IPEN.

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  • IPEN-DOC 25866

    BUSTILLOS, OSCAR V. . A ionização química como fonte de íons na espectrometria de massas. Revista Analytica, v. 17, n. 98, p. 34-35, 2019.

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  • IPEN-DOC 25865

    BUSTILLOS, OSCAR V. . A técnica de ionização por Electrospray na espectrometria de massas. Revista Analytica, v. 17, n. 99, p. 32-33, 2019.

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  • IPEN-DOC 25864

    GONÇALVES, LIVIA de S.; FRANCHI, MARIANA; MATHOR, MONICA B. ; LUGAO, ADEMAR B. ; CARVALHO, VICTOR H.; MEDEIROS, MARISA H.G.; ARTIOLI, GUILHERME G.; VARCA, GUSTAVO H.C. . The molecular structure of β-alanine is resistant to sterilising doses of gamma radiation. PLoS One, v. 14, n. 1, p. 1-13, 2019. DOI: 10.1371/journal.pone.0210713

    Abstract: β-alanine is the rate-limiting point for the endogenous synthesis of carnosine in skeletal muscle. Carnosine has a wide range of implications for health, normal function and exercise performance. Whilst the physiological relevance of carnosine to different tissues remains enigmatic, β-alanine administration is a useful strategy to investigate the physiological roles of carnosine in humans. Intravenous administration of β-alanine is an interesting approach to study carnosine metabolism. However, sterilisation is mandatory due to the nature of the administration route. We evaluated whether sterilising doses of gamma radiation damages the molecular structure and leads to the loss of functional characteristics of β-alanine. Pure β-alanine was sterilised by gamma radiation in sealed glass vials using a 60Co multipurpose irradiator at a dose rate of 8.5 kGy.hour-1 totalising 10, 20, 25 30 and 40 kGy. The molecular integrity was assessed by X-ray Diffraction and changes in content were determined by High Performance Liquid Chromatography (UV-HPLC) and Triple Quadrupole Mass Spectrometer (HPLC/MS-MS). Sterility assurance was evaluated by inoculation assay. To examine whether functional properties were preserved, β-alanine was infused in one participant, who rated the level of paraesthesia on the skin using a 0–3 scale. Urinary β-alanine was quantified before and 24-h following β-alanine infusion using HPLC-ESI+-MS/MS. Irradiation resulted in no change in the crystal structure of β-alanine, no degradation, and no new peaks were identified in the dose range assayed. The inoculation assay showed the absence of viable microorganisms in all β-alanine samples, including those that did not undergo irradiation. Intravenous infusion of β-alanine resulted in paraesthesia and it detected in the urine as per normal. We conclude that gamma radiation is a suitable technique for the sterilisation of β-alanine. It does not lead to degradation, damage to the β-alanine structure, content or loss of function within the evaluated irradiation conditions.

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  • IPEN-DOC 25863

    CHURA-CHAMBI, ROSA M. ; SILVA, CLEIDE M.R. da ; PEREIRA, LENNON R.; BARTOLINI, PAOLO ; FERREIRA, LUIS C. de S.; MORGANTI, LIGIA . Protein refolding based on high hydrostatic pressure and alkaline pH: application on a recombinant dengue virus NS1 protein. PLoS One, v. 14, n. 1, p. 1-14, 2019. DOI: 10.1371/journal. pone.0211162

    Abstract: In this study we evaluated the association of high hydrostatic pressure (HHP) and alkaline pH as a minimally denaturing condition for the solubilization of inclusion bodies (IBs) generated by recombinant proteins expressed by Escherichia coli strains. The method was successfully applied to a recombinant form of the dengue virus (DENV) non-structural protein 1 (NS1). The minimal pH for IBs solubilization at 1 bar was 12 while a pH of 10 was sufficient for solubilization at HHP: 2.4 kbar for 90 min and 0.4 kbar for 14 h 30 min. An optimal refolding condition was achieved by compression of IBs at HHP and pH 10.5 in the presence of arginine, oxidized and reduced glutathiones, providing much higher yields (up to 8-fold) than association of HHP and GdnHCl via an established protocol. The refolded NS1, 109 ± 9.5 mg/L bacterial culture was recovered mainly as monomer and dimer, corresponding up to 90% of the total protein and remaining immunologically active. The proposed conditions represent an alternative for the refolding of immunologically active recombinant proteins expressed as IBs.

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  • IPEN-DOC 25706

    VERRIJSSEN, AN-SOFIE; OPBROEK, THIRZA; BELLEZZO, MURILLO ; FONSECA, GABRIEL P.; VERHAEGEN, FRANK; GERARD, JEAN-PIERRE; MYINT, ARTHUR S.; LIMBERGEN, EVERT J.V.; BERBEE, MAAIKE. A systematic review comparing radiation toxicity after various endorectal techniques. Brachytherapy, v. 18, n. 1, p. 71-86, 2019. DOI: 10.1016/j.brachy.2018.10.001

    Observação: Corrigendum anexado. Brachytherapy, v. 18, p. 427, 2019. DOI: 10.1016/j.brachy.2018.10.001

    Abstract: PURPOSE: A clinical complete response is seen after neoadjuvant chemoradiation for rectal tumors in 15%e20% of patients. These patients can potentially be spared mutilating total mesorectal excision surgery through a watch-and-wait policy. Recent studies show that dose escalation by a radiation boost increases the clinical complete response rate. The boost dose to the tumor can be administered through external beam radiotherapy or through internal radiotherapy using techniques like contact therapy, low-dose-rate or high-dose-rate brachytherapy (BT). However, limited information is available concerning treatment-related toxicity of these techniques. With this systematic review, we aim to summarize and compare published data concerning acute and late toxicity after contact X-ray therapy (CXT) and BT for rectal cancer. METHODS AND MATERIALS/RESULTS: Thirty-eight studies reporting toxicity after endorectal radiation techniques for rectal cancer were included, resulting in 3682 patients for analysis. Direct comparison of toxicity by the different radiation modes was hampered by various combinations of endorectal techniques, a lack of clear reporting of toxicity scores, dose prescription, technique used, and treated volumes. $ Grade 3 rectal toxicity was reported in 2.9% of patients having received only CXT; 6.3% of patients who received only BT had Grade 3 rectal toxicity, and BT also caused Grade 3 urinary toxicity in 1 patient. CONCLUSION: All techniques reported some$Grade 3 toxicity. Toxicity after CXTwas confined to the rectum, whereas after BT, urogenital toxicity and skin toxicity were seen as well. Unfortunately, few specific conclusions could be drawn regarding the dose-related risk of toxicity for the various techniques due to nonuniform reporting strategies and missing information. To enable future comparisons and improvements, the endorectal radiation field urgently needs consensus guidelines on dose reporting, dose prescription, treatment volume specification, and toxicity reporting. 2018 American Brachytherapy Society. Published by Elsevier Inc. All rights reserved.

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  • IPEN-DOC 25860

    PARREIRA, LUANNA S.; ANTONIASSI, RODOLFO M. ; FREITAS, ISABEL C.; OLIVEIRA, DANIELA C. de; SPINACE, ESTEVAM V. ; CAMARGO, PEDRO H.C.; SANTOS, MAURO C. dos. MWCNT-COOH supported PtSnNi electrocatalysts for direct ethanol fuel cells: low Pt content, selectivity and chemical stability. Renewable Energy, v. 143, p. 1397-1405, 2019. DOI: 10.1016/j.renene.2019.05.067

    Abstract: PtSnNi electrocatalysts (60: 40: 40 mass ratio) supported on Vulcan® XC-72 (Cabot) carbon and COOHfunctionalized multiwalled carbon nanotubes (Cheaptubes®) with 15% of metal loading were prepared. The nanoparticles size of 2e3 nm for both supports was estimated by HRTEM. In the direct ethanol fuel cell experiments, PtSnNi/C presents 50 mA cm 2 reaching the maximum power density (MPD) of 12mWcm 2 and decreasing at higher currents, while PtSnNi/MWCNT-COOH obtains similar values of MPD (60 mA cm 2), but keeping the best performance. By GC (gas chromatography) technique, it was possible to observe that the electrocatalyst supported on MWCNT-COOH favored the ethanol oxidation to acetaldehyde and acetic acid, although the material supported on Vulcan® XC-72 carbon presented almost 100% of selectivity for acetaldehyde. This behavior was maintained also when the current of 0.1 A was applied for 80 min. For the PtSnNi/C electrocatalyst, the selectivity to only acetaldehyde can be related to Sn and Ni dissolution process that can become the electrocatalytic activity similar to Pt/C, decreasing the power density as observed in our experiments. Established by EDS analysis, after 80 min of polarization, the Ni and Sn relative atomic ratio was lower on the catalytic anodic layer of PtSnNi/C than on PtSnNi/MWCNT-COOH.

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  • IPEN-DOC 25859

    POZZO, LORENA ; MONTEIRO, LUCILENA R. ; CERCI, JULIANA J.; FANTI, STEFANO; NEGRO, ANTONELLA; TRINDADE, EVELINDA. HTA in nuclear medicine: [Ga-68]PSMA PET/CT for patients with prostate cancer. Clinical and Translational Imaging, v. 7, n. 1, p. 7-20, 2019. DOI: 10.1007/s40336-019-00313-8

    Abstract: The [ 68Ga]PSMA PET/CT has been an option on clinical research tools to stage and to restage prostate cancer patients, although, with promising results, this radiopharmaceutical cannot be commercialized yet. Hence, up to date, [ 68Ga]PSMA has been used in a clinical research context. Once regulatory body approved it for marketing, health systems are responsible for the reimbursement decision. Health Technology Assessments (HTA) tools should be considered to base and to help decision-makers to spread or not this new technology. Regarding [ 68Ga]PSMA, under HTA framework, the present study searched for secondary studies and hence assessed three systematic reviews with meta-analyses published considering prostate cancer patients in different scenarios, same imaging technology but different comparators and outputs. The secondary studies considered outputs such as accuracy, detectability, positivity and change of management. Using AMSTAR-2, the meta-analysis methods and results were evaluated with 16 questions able to identify critical weaknesses, such as risk of bias, publication bias, true effect, and study heterogeneity. To increase the observational number of patients, to register positive and negative findings, and consolidate regional and multi-center clinical data which were suggestions on study design, structure and statistics made to improve the quality in future primary and secondary studies.

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  • IPEN-DOC 25858

    PETRI, A.R. ; MANGIAROTTI, A.; GONCALVES, J.A.C. ; BUENO, C.C. . Effect of the ohmic drop in a RPC-like chamber for measurements of electron transport parameters. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-11, 2019. DOI: 10.15392/bjrs.v7i2A.637

    Abstract: The main advantage of Resistive Plate Chambers (RPCs), applied, for instance, in High-Energy Experiments and Positron Emission Tomography (PET), is that it is spark-protected due to the presence of, at least, one high-resistive electrode. However, the ohmic drop across the latter can affect the charge multiplication significantly. In this work, we investigate this effect in a RPC-like chamber. The counter was filled with nitrogen at atmospheric pressure and the primary ionization was produced by the incidence of nitrogen pulsed laser beam on an aluminum cathode. The illumination area of the cathode was measured using a foil of millimetric paper overlaid on this electrode. In this way, the resistance of the glass anode could be estimated using the known resistivity of the glass (ρ=2×1012 Ω.cm). Therefore, the voltage drop across the dielectric was calculated by the product of the current across the gas gap and the anode resistance. In order to mitigate the effect of the resistive electrode, the laser beam intensity was limited by interposing metallic meshes between the laser and the chamber window. The dependence of the ohmic drop from the applied voltage was analyzed. The results obtained shown that, without the meshes, the ohmic drop corresponds up to 7% of the applied voltage, preventing the detection system to reach values of density-normalized electric fields in the gas gap (Eeff/N) higher than 166 Td. By minimizing the laser beam intensity and, consequently, the primary ionization, the ohmic drop represented only 0.2% of the applied voltage, extending the Eeff /N range up to 175 Td.

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  • IPEN-DOC 25857

    OLIVEIRA-SILVA, TAMIRES de; ALVARENGA, LETICIA H.; LIMA-LEAL, CINTIA; GODOY-MIRANDA, BIANCA; CARRIBEIRO, PAMELA; SUZUKI, LUIS C. ; RIBEIRO, MARTHA S. ; KATO, ILKA T.; PAVANI, CHRISTIANE; PRATES, RENATO A.. Effect of photodynamic antimicrobial chemotherapy on Candida albicans in the presence of glucose. Photodiagnosis and Photodynamic Therapy, v. 27, p. 54-58, 2019. DOI: 10.1016/j.pdpdt.2019.05.032

    Abstract: Background: Candida albicans is an opportunistic commensal microorganism, often associated with severe infections in immunosuppressed individuals. C. albicans has hexose transporters that may favor the intracellular accumulation of photosensitizer (PS). the aims of this study were to investigate the influence of glucose load on photodynamic antimicrobial chemotherapy (PACT); and the role that membrane transport system plays on this therapy in the presence of glucose. Material and methods: Strains of C. albicans were selected: ATCC 10231, YEM 12, YEM 13, YEM 14 and YEM 15. All strains were grown aerobically on Sabouraud agar and incubated at 30 °C for 24 h. The strains were treated with and without glucose, and divided into Control (no treatment), LED light (660 nm, 166 mW/cm2), Photosensitizer (100 μM methylene blue) and PACT at 1, 3 and 6 min of irradiation groups. The colony forming units were counted and data submitted to statistical analysis (ANOVA) and Tukey's test. The concentration of methylene blue (MB) outside the yeast was measured by fluorescence spectroscopy. Results: PACT inactivate C. albicans and the presence of glucose did not affect the killing effect for most strains. Only YEM12 was partially affected by its presence. Regarding efflux systems, ABC overexpressing strain showed a protective effect on the yeast cells. We observed that yeast with overexpression of major facilitator superfamily (MFS) membrane pore tended to accumulate more MB in its cytoplasm, whereas strains that overexpressed ABC pumps (ATP-binding cassette transporters) tended to decrease MB uptake and survive the photodynamic challenge. Conclusion: Presence of glucose showed a small effect on PACT . The accumulation of MB on yeast induces more photodynamic inactivation; however, the photodynamic efficacy depends on the type and characteristics of the microbial strain.

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  • IPEN-DOC 25856

    JUNOT, DANILO O. ; SANTOS, ANA G.M.; ANTONIO, PATRICIA L. ; REZENDE, MARCOS V.S.; SOUZA, DIVANIZIA N.; CALDAS, LINDA V.E. . Dosimetric and optical properties of CaSO4:Tm and CaSO4:Tm,Ag crystals produced by a slow evaporation route. Journal of Luminescence, v. 210, p. 58-65, 2019. DOI: 10.1016/j.jlumin.2019.02.005

    Abstract: The motivation of this work was to produce TL dosimeters based on crystals of CaSO4 doped with thulium and silver, by means of a suitable new route. The crystals were produced by an adaptation of the slow evaporation route using calcium carbonate (CaCO3) as precursor, and incorporating the dopants (Tm2O3 and silver nanoparticles) in a solution of sulfuric acid, which is evaporated resulting in CaSO4:Tm or CaSO4:Tm,Ag crystal powders. X-ray diffraction analyses showed that the produced samples exhibit only a single phase corresponding to the crystal structure of anhydrite. Optical characterization was performed to determine the band gap of the materials. Samples did not show a reasonable OSL signal after stimulation with blue LEDs. TL characteristics such as glow curves, linearity and reproducibility of response, minimum detectable dose and fading were evaluated. The CaSO4:Tm samples showed TL emission glow curves with peaks in temperatures proper for dosimetry. The CaSO4:Tm,Ag samples presented a very intense peak displaced to high temperatures that could only be observed by applying heating rates below 4 °C/s. Samples doped with thulium oxide and silver nanoparticles showed the highest TL intensity and lowest fading.

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  • IPEN-DOC 25855

    AGUIAR, D.J.M. de; PADILHA, A.F.; PLAUT, R.L.; SILVA, M.R. da; LIMA, N.B. de . Comparative study on the forming and reversion of strain-induced martensite in two duplex stainless steels: developing a model for VSM. Journal of Magnetism and Magnetic Materials, v. 485, p. 8-15, 2019. DOI: 10.1016/j.jmmm.2019.04.054

    Abstract: An original feature of this work is the proposal of two equations to fit the volume fraction of ferromagnetic (α+α′) phases that can be applied in the measurement of magnetic saturation of comminuted duplex and superduplex stainless steels (for example, powders or filed chips). Duplex stainless steels contain similar volume fractions of austenite (γ) and ferrite (α) in their microstructure. Two steels exemplify this class, namely the most widely used duplex UNS S31803 and superduplex UNS S32520 stainless steels. The phenomena of work hardening, formation, and reversion of strain-induced martensite (α′) in austenite were compared in both stainless steels. Samples were work-hardened and annealed under identical conditions, and their behavior was evaluated mainly through X-ray diffraction and magnetic measurements. Notably, the volume fraction of strain-induced α′ in duplex stainless steel was as high as 32%, which indicated that this steel had a greater tendency to form α′ than superduplex stainless steel, for which the corresponding value equaled 15%. Annealing at 650 °C for 2 h promoted the reversion of strain-induced α′ into γ, decreasing the volume fraction of the former phase from 32 to 2% (duplex) and from 15 to 6% (superduplex).

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  • IPEN-DOC 25854

    GABBAI-ARMELIN, P.R.; FERNANDES, K.R.; MAGRI, A.M.P.; SILVA, A.C. da; FORTULAN, C.A.; RENNO, A.C.M.. Characterization and cytotoxicity evaluation of bio-inspired bioactive Glass/Collagen/Magnesium composites. Materials Chemistry and Physics, v. 228, p. 201-209, 2019. DOI: 10.1016/j.matchemphys.2019.02.072

    Abstract: Bone fractures are a common clinical event related to trauma, aging or diseases. Since bone repair is complex, abnormal consolidation may occur or, even, non-union. Biomaterials have a key role in this context, since they can stimulate bone cell differentiation, accelerating the healing process. Bioactive glasses (BG) represent a promising class of biomaterials due to its high bioactivity and osteogenic potential. Nevertheless, the osteoconductive properties of BG may not be enough to stimulate consolidation in critical situations. Thus, it was hypothesized that enriching BG with other materials such as collagen (Col) and magnesium (Mg), trying to make a composite with similar properties to bone tissue, would constitute a more suitable graft for tissue engineering. This work aimed at obtaining BG/Col/Mg composites and evaluating their physicochemical features. Moreover, L929 and MC3T3-E1 cell culture studies were done to investigate the cytotoxicity of the composites. The results showed that Mg could be successfully introduced, at different percentages (1, 3 and 5%), into BG and BG/Col composites, improving mechanical properties and retaining the bioactivity of BG. Ca assay measurements demonstrated that reactions in the Mg/solution interface, i.e. reactions between Mg and the ions in the simulated body fluid (SBF) have led to an increased Ca uptake for compositescontaining 3 and 5% Mg compared to plain BG and BG/Col. In vitro studies showed that BG and BG/Col containing 1% of Mg were non-cytotoxic and biocompatible. This percentage of Mg is promising for forward works. Our data on the present BG/Mg and BG/Col/Mg-based composites are encouraging and may lead to further molecular and cell culture studies, and in vivo investigations to clarify the biological performance of these new biomaterials.

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  • IPEN-DOC 25853

    PINHEIRO, ANDRE L.G.; CARMO, JOSE V.C. do; CARVALHO, DAVI C.; OLIVEIRA, ALCINEIA C.; RODRIGUEZ-CASTELLON, ENRIQUE; TEHUACANERO-CUAPA, SAMUEL; OTUBO, LARISSA ; LANG, ROSSANO. Bio-additive fuels from glycerol acetalization over metals-containing vanadium oxide nanotubes (MeVOx-NT in which, Me=Ni, Co, or Pt). Fuel Processing Technology, v. 184, p. 45-56, 2019. DOI: 10.1016/j.fuproc.2018.11.008

    Abstract: The biodiesel production has led to a drastic surplus of glycerol and catalytic conversion of glycerol into valueadded products is of great industrial importance. Thus, the acetalization of glycerol with ketone or aldehydes allows the glycerol transformation into bio–additive fuels. In this work, metals-containing vanadium oxides nanotubes (MeVOx NT in which, Me=Co, Pt or Ni) have been synthesized with additional internal porosity and tested in the acetalization of glycerol with acetone (AG) for valuable biofuels production. The catalysts showed remarkable performances in the AG reaction. Furthermore, by variation of the composition, catalyst loading and temperature and using distinct substrates (butyraldehyde, furfuraldehyde and benzaldehyde), NiVOxNT is active, being very selective to solketal and reciclable for 4 times in the AG reaction. On the contrary, pure VOx NT easily deactivated due to the structure agent removal during the reaction, which promote the collapse of the tubular structure. The CoVOxNT and PtVOxNT catalysts did not exhibit such a stable structure and easily deactivated in the reaction due to leaching of the metals oxides during the AG.

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  • IPEN-DOC 25851

    BENEDETTO, RAQUEL ; MASSICANO, ADRIANA V.F.; CRENSHAW, BRYANT K.; OLIVEIRA, RENATO; REIS, RUI M.; ARAUJO, ELAINE B. ; LAPI, SUZANNE E.. Zr-89-DFO-cetuximab as a molecular imaging agent to identify cetuximab resistance in head and neck squamous cell carcinoma. Cancer Biotherapy and Radiopharmaceuticals, v. 34, n. 5, p. 288-296, 2019. DOI: 10.1089/cbr.2018.2616

    Abstract: Background: Despite the improvement in clinical outcomes for head and neck squamous cell carcinoma (HNSCC) as the result of cetuximab, patients may present with or develop resistance that increases tumor recurrence rates and limits clinical efficacy. Therefore, identifying those patients who are or become resistant is essential to tailor the best therapeutic approach. Materials and Methods: Cetuximab was conjugated to p-NCS-Bz-DFO and labeled with 89Zr. The resistance model was developed by treating FaDu cells with cetuximab. Western blotting (WB) and specific binding assays were performed to evaluate epidermal growth factor receptor (EGFR) expression and 89Zr-DFO-cetuximab uptake in FaDu cetuximab-resistant (FCR) and FaDu cetuximab-sensitive (FCS) cells. Positron emission tomography imaging and biodistribution were conducted in NU/NU nude mice implanted with FCR or FCS cells. Results: Cetuximab was successfully radiolabeled with 89Zr (‡95%). Binding assays performed in FCR and FCS cells showed significantly lower 89Zr-DFO-cetuximab uptake in FCR ( p < 0.0001). WB suggests that the resistance mechanism is associated with EGFR downregulation ( p = 0.038). This result is in agreement with the low uptake of 89Zr-DFO-cetuximab in FCR cells. Tumor uptake of 89Zr-DFO-cetuximab in FCR was significantly lower than FCS tumors ( p = 0.0340). Conclusions: In this work, the authors showed that 89Zr-DFO-cetuximab is suitable for identification of EGFR downregulation in vitro and in vivo. This radiopharmaceutical may be useful for monitoring resistance in HNSCC patients during cetuximab therapy.

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  • IPEN-DOC 25850

    FRIMAIO, AUDREW ; NASCIMENTO, BRUNA C.; BARRIO, RAMON M.M.; CAMPOS, LETICIA L. ; COSTA, PAULO R.. X-ray spectrometry applied for determination of linear attenuation coefficient of tissue-equivalent materials. Radiation Physics and Chemistry, v. 160, p. 89-95, 2019. DOI: 10.1016/j.radphyschem.2019.03.021

    Abstract: Resin-based materials equivalent to water were developed and four different samples were obtained. The linear attenuation coefficients of all samples was evaluated using X-ray spectrometry with primary and transmitted beams using voltages at the ranging from 60 to 120 kV. The experimental measured values were compared with theoretical reference values to water and with that obtained using the Least Square Method algorithm methodology (method applied to diagnostic radiology and radiotherapy). Our results show that differences between the measured values and the target μ(E) was lower than 7% ± 0.3 in the energy range from 20 to 80 keV. These results enable to consider that the material developed and produced is a good option to be used as a waterequivalent material and the experimental method adequate to its quantitative evaluation.

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  • IPEN-DOC 25849

    BARROSO, A.G.; GARCIA, R.H.L. ; DEL MASTRO, N.L. . X-ray diffraction pattern and relative crystallinity of irradiated arrowroot starch. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-7, 2019. DOI: 10.15392/bjrs.v7i2A.645

    Abstract: After cereals, tubers and roots are the major source of starch for food and industrial uses. Arrowroot refers to any plant of the genus Marantha, but the term is most commonly used to describe the easily digested starch ob-tained from the rhizomes of Marantha arundinacae. The rhizomes of this herbaceous plant contain about 20% of starch. As few studies exist on arrowroot starch, the objective of this preliminary work was to study the X-ray diffraction (XRD) patterns of arrowroot starch when treated by γ-radiation with doses up to 15 kGy in a 60Co source. The XRD patterns of the arrowroot starch exhibited A-type crystalline arrangements with strong peaks at approximately 15º, 17º, 18º and 23º (2θ). A slight increase of diffractogram peaks intensity was noticed after the irradiation process. The cristallinity index was calculated using Bruker DIFFRAC.EVA version 4.2 software. Relative crystallinity seems to increase with irradiation at low doses that could be attributed to different radia-tion sensitivity among the amorphous and crystalline regions of the arrowroot starch molecule. Present results will contribute to elucidate the behavior under radiation treatment of this starchy component increasingly em-ployed by the food industry.

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  • IPEN-DOC 25848

    ICHIKAWA, R.U. ; LINHARES, H.M.S.M.D.; SILVA, A.S.B. da ; TEIXEIRA, M.I. ; RANIERI, I.M. ; TURRILLAS, X.; MARTINEZ, L.G. . X-ray diffraction analysis of KY3F10 nanoparticles doped with Nd and preliminary studies for its use in high-dose radiation dosimetry. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-13, 2019. DOI: 10.15392/bjrs.v7i2A.586

    Abstract: In this work, the structure and microstructure of Nd:KY3F10 nanoparticles was probed using X-ray synchrotron diffraction analysis. Rietveld refinement was applied to obtain cell parameters, atomic positions and atomic dis-placement factors to be compared with the ones found in literature. X-ray line profile methods were applied to determine mean crystallite size and crystallite size distribution. Thermoluminescent (TL) emission curves were measured for different radiation doses, from 0.10 kGy up to 10.0 kGy. Dose-response curves were obtained by area integration beneath the peaks from TL. The reproducibility of the results in this work has shown that this material can be considered a good dosimetric material.

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  • IPEN-DOC 25847

    ANDRADE, ADRIANO B.; BISPO, GIORDANO F. da C.; MACEDO, ZELIA S.; BALDOCHI, SONIA L. ; YUKIHARA, EDUARDO G.; VALERIO, MARIO E.G.. VUV excited luminescence and thermoluminescence investigation on Er3+- or Pr3+-doped BaY2F8 single crystals. Optical Materials, v. 90, p. 238-243, 2019. DOI: 10.1016/j.optmat.2019.02.044

    Abstract: Photoluminescence (PL), thermoluminescence (TL) emission spectra and TL glow curves of barium yttrium fluoride (BaY2F8 – BaYF), undoped and doped with erbium (Er3+) or praseodymium (Pr3+) were measured to investigate the fundamental absorption (band gap – Eg), the nature of the trapping centers, as well as the electronic transitions of Ln3+ in BaYF host. The band gap energy Eg of BaY2F8 was determined by vacuum ultraviolet (VUV) excitation measurements to be around 11.2 eV. Additionally, the electronic transition from excited states of Ln3+ ions and the exciton state were also identified. TL emission spectra showed that the TL emission of doped samples is related to the Ln3+ ion, indicating that the related host trapping centers are not affected by the new trapping centers originated due the dopant ions. Trap depths were calculated by fitting the glow curves using a first order kinetics model. Host-related trapping centers were attributed to intrinsic defects such as Vk and F centers and the new TL peaks observed for Ere and Pr-doped samples was associated to the electrons trapping centers. These results lead us to propose a simple model to explain the origin of the TL emission in BaYF.

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  • IPEN-DOC 25846

    SOUZA, C.H. ; SHORTO, J.M.B. ; SIQUEIRA, P.T.D. ; NUNES, M.G. ; SILVA JUNIOR, I.A. ; YORIYAZ, H. . Verification of angular dependence in MOSFET detector. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-11, 2019. DOI: 10.15392/bjrs.v7i2A.734

    Abstract: In vivo dosimetry is an essential tool for quality assurance programs, being a procedure commonly performed with thermoluminescent dosimeters (TLDs) or diodes. However, a type of dosimeter that has increasing popularity in recent years is the metal-oxide-semiconductor field effect transistor (MOSFET) detector. MOSFET dosimeters fulfill all the necessary characteristics to realize in vivo dosimetry since it has a small size, good precision and feasibility of meas-urement, as well as easy handling. Nevertheless, its true differential is to allow reading of dose in real time, enabling immediate intervention in the correction of physical parameters deviations and anticipation of small anatomical changes in the patient during treatment. In order for MOSFET dosimeter to be better accepted in clinical routine, information reporting performance should be available frequently. For this reason, this work proposes to verify reproducibility and angular dependence of a standard sensitivity MOSFET dosimeter (TN-502RD-H) for Cs-137 and Co-60 sources. Exper-imental data were satisfactory and MOSFET dosimeter presented a reproducibility of 3.3% and 2.7% (±1 SD) for Cs-137 and Co-60 sources, respectively. In addition, an angular dependence of up to 6.1% and 16.3% for both radioactive sources, respectively. It is conclusive that MOSFET dosimeter TN-502RD-H has satisfactory reproducibility and a considerable angular dependence, mainly for the Co-60 source. This means that although precise measurements, special attention must be taken for applications in certain anatomical regions in a patient.

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  • IPEN-DOC 25845

    CARVALHO, P.R. ; MUNITA, C.S. ; LAPOLLI, A.L. . Validity studies among hierarchical methods of cluster analysis using cophenetic correlation coefficient. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-14, 2019. DOI: 10.15392/bjrs.v7i2A.668

    Abstract: The literature presents many methods to produce data set clusters and the better method choice becomes hardest because the various combinations between them based on different dissimilarity measures can lead to different cluster patterns and false interpretations. Nevertheless, little effort has been expended in evaluating these methods empirically using an archeological data set. In this way, this work has the objective to develop a comparative study of the cluster analysis methods and to identify what is the most appropriate for an archeological data set. For this, 45 ceramic fragments samples data set was analyzed by instrumental neutron activation analysis (INAA). And, five hierarchical methods of cluster were used to this data set: Single linkage, Complete linkage, Average linkage, Centroid and Ward. The validation was done calculating cophenetic correlation coefficient values by a statistical program R and the comparison between them showed the average linkage method was more accurate for the 45 ceramic fragments samples data set. With this, the statistical program R showed be an tool option for other scientists to calculate their cophenetic correlation coefficient and to identify the more accurate methods for their archeological data set.

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  • IPEN-DOC 25844

    DEL NERO, R.A. ; NAKANDAKARI, M.V.N.; YORIYAZ, H. . Validating a virtual source model based in Monte Carlo method for profiles and percent depth doses calculation. Brazilian Journal of Radiation Sciences, v. 7, n. 2A, p. 1-8, 2019. DOI: 10.15392/bjrs.v7i2A.689

    Abstract: The Monte Carlo method for radiation transport has been adapted for medical physics application. More specifically, it has received more attention in clinical treatment planning with the development of more efficient computer simulation techniques. In linear accelerator modeling by the Monte Carlo method, the phase space data file (phsp) is an alternative representation for radiation source. However, to create a phase space file and obtain good precision in the results, it is necessary detailed information about the accelerator's head and commonly the supplier does not provide all the necessary data. An alternative to the phsp is the Virtual Source Model (VSM). This alternative approach presents many advantages for the clinical Monte Carlo application. This is the most efficient method for particle generation and can provide an accuracy similar when the phsp is used. This research propose a VSM simulation with the use of a Virtual Flattening Filter (VFF) for profiles and percent depth doses calculation. Two different sizes of open fields (40 x 40 cm² and 40 x 40 cm² rotated 45°) were used and two different source to surface distance (SSD) were applied: the standard 100 cm and custom SSD of 370 cm, which is applied in radiotherapy treatments of total body irradiation. The data generated by the simulation was analyzed and compared with experimental data to validate the VSM. This current model is easy to build and test.

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A pesquisa no RD utiliza os recursos de busca da maioria das bases de dados. No entanto algumas dicas podem auxiliar para obter um resultado mais pertinente.

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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.