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]


Comunidade no repositório

Selecione a comunidade para navegar nas coleções.

Submissões recentes

  • IPEN-DOC 24395

    VELO, A.F. ; CARVALHO, D.V.S. ; HAMADA, M.M. . Liquid distribution and holdup in the random packed column. Flow Measurement and Instrumentation, v. 62, p. 176-185, 2018. DOI: 10.1016/j.flowmeasinst.2017.11.002

    Abstract: In the present work, a third-generation gamma transmission tomography system was used to evaluate the liquid distributions of a Raschig rings random packed column, at two different water flows: 2 and 6 l/min. For each water flow, the measurements were carried out at nine column heights. The liquid-gas holdup was determined by the reconstructed images. The distribution of the Raschig rings, as well as the position and the average accumulated amount of the water concentration among the Raschig rings were capable to be determined, even at low temporal resolution of the system of 8.8 h. The regions of accumulated water concentration were similar for the water flow velocities at 2 and 6 l/min. The average accumulated water concentration for 6 l/min was higher compared to 2 l/min. The spatial resolution of the tomography system determined by the modulation transfer function (MTF) analysis was of 1.45 mm.


  • IPEN-DOC 24392

    HARAGUCHI, MARCIO I.; CALVO, WILSON A.P. ; KIM, HAE Y.. Tomographic 2-D gamma scanning for industrial process troubleshooting. Flow Measurement and Instrumentation, v. 62, p. 235-245, 2018. DOI: 10.1016/j.flowmeasinst.2017.09.004

    Abstract: Gamma scanning is a nuclear inspection technique widely used to troubleshoot industrial equipments in refineries and petrochemicals plants such as distillation columns and reactors. In this technique, a sealed radiation source and detector move along the equipment, and the intensity readouts generate the density profile of the equipment. Although many improvements have been introduced in recent years, the result of gamma scan still consists of a simple 1-D density plot. In this work, we present the tomographic gamma scanning that, using image reconstruction techniques, shows the result as a 2-D image of density distribution. Clearly, an image reveals more features of the equipment than a 1-D graph and many problems that could not be troubleshooted using the conventional technique can now be solved with this imaging technique. We use ART (Algebraic Reconstruction Technique) intercalated with total variation minimization filter. The use of total variation minimization leads to compressive sensing tomography, allowing to obtain good quality reconstruction from few irradiation data. We simulated the reconstruction of different density distributions. We applied the new technique to data obtained by irradiating with gamma rays phantoms that emulate industrial equipments. Finally, we present the result obtained by applying the innovative technique to real operating distillation column. It seems that the new technique has identified a problem in this equipment that is very difficult to detect using conventional gamma scan.


  • IPEN-DOC 25045

    RODRIGUES, THENNER S. ; MOURA, ARTHUR B.L. de ; SILVA, FELIPE A. e ; CANDIDO, EDUARDO G. ; SILVA, ANDERSON G.M. da; OLIVEIRA, DANIELA C. de; QUIROZ, JHON; CAMARGO, PEDRO H.C.; BERGAMASCHI, VANDERLEI S. ; FERREIRA, JOAO C. ; LINARDI, MARCELO ; FONSECA, FABIO C. . Ni supported Ce0.9Sm0.1O2-δ nanowires: an efficient catalyst for ethanol steam reforming for hydrogen production. Fuel, v. 237, p. 1244-1253, 2019. DOI: 10.1016/j.fuel.2018.10.053

    Abstract: We reported herein the synthesis in high yields (> 97%) of Ce0.9Sm0.1O2-δ nanowires displaying well-defined shape, size, and composition by a simple, fast, and low-cost two-step hydrothermal method. The Ce0.9Sm0.1O2-δ nanowires synthesis was followed by the wet impregnation of Ni without the utilization of any stabilizing agent. The Ni/Ce0.9Sm0.1O2-δ nanowires showed higher surface area, high concentration of oxygen vacancies at surface, and finely dispersed Ni particles with significantly higher metallic surface area as compared with catalysts prepared from commercial materials with similar compositions. Such unique and improved properties are reflected on the catalytic performance of the Ni/Ce0.9Sm0.1O2-δ nanowires towards ethanol steam reforming. The nanowires exhibited high yields for hydrogen production (∼60% of selectivity) and an exceptional stability with no loss of activity after 192 h of reaction at 550 °C. The reported results provide insights and can inspire highyield production of nanostructured catalysts displaying controlled and superior properties that enable practical applications in heterogeneous catalysis.


  • IPEN-DOC 25044

    MARTINS-JUNIOR, HELIO A. ; LEBRE, DANIEL T.; WANG, ALEXANDRE Y.; PIRES, MARIA A.F. ; BUSTILLOS, OSCAR V. . Residue analysis of glyphosate and Aminomethylphosphonic Acid (AMPA) in soybean using liquid chromatography coupled with Tandem Mass Spectrometry. In: NG, TZI B. (Ed.). Soybean - biochemistry, chemistry and physiology. Rijeka, Croatia: IntechOpen, 2011. p. 495-506, cap. 27. DOI: 10.5772/15817


  • IPEN-DOC 25039

    ALVES, ELIANE G.; TOTA, JULIO; TURNIPSEED, ANDREW; GUENTHER, ALEX B.; VEGA BUSTILLOS, JOSE O.W. ; SANTANA, RAONI A.; CIRINO, GLAUBER G.; TAVARES, JULIA V.; LOPES, ALINE P.; NELSON, BRUCE W.; SOUZA, RODRIGO A. de; GU, DASA; STAVRAKOU, TRISSEVGENI; ADAMS, DAVID K.; WU, JIN; SALESKA, SCOTT; MANZI, ANTONIO O.. Leaf phenology as one important driver of seasonal changes in isoprene emissions in central Amazonia. Biogeosciences, v. 15, n. 13, p. 4019-4032, 2018. DOI: 10.5194/bg-15-4019-2018

    Abstract: Isoprene fluxes vary seasonally with changes in environmental factors (e.g., solar radiation and temperature) and biological factors (e.g., leaf phenology). However, our understanding of the seasonal patterns of isoprene fluxes and the associated mechanistic controls is still limited, especially in Amazonian evergreen forests. In this paper, we aim to connect intensive, field-based measurements of canopy isoprene flux over a central Amazonian evergreen forest site with meteorological observations and with tower-mounted camera leaf phenology to improve our understanding of patterns and causes of isoprene flux seasonality. Our results demonstrate that the highest isoprene emissions are observed during the dry and dry-to-wet transition seasons, whereas the lowest emissions were found during the wet-to-dry transition season. Our results also indicate that light and temperature cannot totally explain isoprene flux seasonality. Instead, the camera-derived leaf area index (LAI) of recently mature leaf age class (e.g., leaf ages of 3-5 months) exhibits the highest correlation with observed isoprene flux seasonality (R-2 = 0.59, p < 0.05). Attempting to better represent leaf phenology in the Model of Emissions of Gases and Aerosols from Nature (MEGAN 2.1), we improved the leaf age algorithm by utilizing results from the camera-derived leaf phenology that provided LAI categorized into three different leaf ages. The model results show that the observations of age-dependent isoprene emission capacity, in conjunction with camera-derived leaf age demography, significantly improved simulations in terms of seasonal variations in isoprene fluxes (R-2 = 0.52, p < 0.05). This study highlights the importance of accounting for differences in isoprene emission capacity across canopy leaf age classes and identifying forest adaptive mechanisms that underlie seasonal variation in isoprene emissions in Amazonia.


  • IPEN-DOC 25038

    NATALE, LIVIA C.; RODRIGUES, MARCELA C.; ALANIA, YVETTE; CHIARI, MARINA D.S.; BOARO, LETICIA C.C.; COTRIM, MARYCEL ; VEGA, OSCAR ; BRAGA, ROBERTO R.. Mechanical characterization and ion release of bioactive dental composites containing calcium phosphate particles. Journal of the Mechanical Behavior of Biomedical Materials, v. 84, p. 161-167, 2018. DOI: 10.1016/j.jmbbm.2018.05.022

    Abstract: Objective: to verify the effect of the addition of dicalcium phosphate dihydrate (DCPD) particles functionalized with di- or triethylene glycol dimethacrylate (DEGDMA or TEGDMA) on the degree of conversion (DC), post-gel shrinkage (PS), mechanical properties, and ion release of experimental composites. Methods: Four composites were prepared containing a BisGMA/TEGDMA matrix and 60 vol% of fillers. The positive control contained only barium glass fillers, while in the other composites 15 vol% of the barium was replaced by DCPD. Besides the functionalized particles, non-functionalized DCPD was also tested. DC after 24 h (n=3) was determined by FTIR spectroscopy. The strain gage method was used to obtain PS 5 min after photoactivation (n=5). Flexural strength and modulus (n=10) were calculated based on the biaxial flexural test results, after specimen storage for 24 h or 60 days in water. The same storage times were used for fracture toughness testing (FT, n=10). Calcium and phosphate release up to 60 days was quantified by ICP-OES (n=3). Data were analyzed by ANOVA/Tukey test (alpha: 5%). Results: Composites containing functionalized DCPD presented higher DC than the control (p < 0.001). The material containing DEGDMA-functionalized particles showed higher PS than the other composites (p < 0.001). After 60 days, only the composite with DEGDMA-functionalized DCPD presented fracture strength similar to the control, while for flexural modulus only the composite with TEGDMA-functionalized particles was lower than the control (p < 0.001). FT of all composites containing DCPD was higher than the control after 60 days (p < 0.005). Calcium release was higher for the composite with non-functionalized DCPD at 15 days and no significant reductions were observed for composites with functionalized DCPD during the observation period (p < 0.001). For all the tested composites, phosphate release was higher at 15 days than in the subsequent periods, and no difference among them was recorded at 45 and 60 days (p < 0.001). Conclusions: DCPD functionalization affected all the studied variables. The composite with DEGDMA-functionalized particles was the only material with strength similar to the control after 60 days in water; however, it also presented the highest shrinkage. The presence of DCPD improved FT, regardless of functionalization. DCPD functionalization reduced ion release only during the first 15 days.


  • IPEN-DOC 25037

    BUSTILLOS, OSCAR V. ; SASSINE, ANDRE. A magia da curva cicloide: braquistocrona e tautocrona. São Paulo: Scortecci, 2011. 256 p.

    Notas de conteúdo: Livro disponível somente na versão impressa. Consulte a biblioteca do IPEN.

    Abstract: O livro explora a curva cicloide, desde o gênesis até suas aplicações e também as consequências que acarretaram o estudo da curva cicloide. A obra apresenta os enredos históricos dos protagonistas que estudaram a curva cicloide, mostrando por qual motivo ela é chamada de Helena dos geômetras. Entre os protagonistas estão os irmãos Bernoulli, Newton, Leibniz, Pascal, Roberval, Galileu e outros.


  • IPEN-DOC 25043

    BITELLI, ULYSSES D. . Comissionamento : calibração da potência do reator IPEN/MB-01 pela Técnica de Análise por Ativação Neutrônica. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-RMB-005-00-RELT-084-00). Restrito.

    Título do projeto: Reator Multipropósito Brasileiro (RMB)

    Abstract: Este relatório apresenta o procedimento de comissionamento para a calibração da potência do reator IPEN/MB-01, utilizando a técnica de análise por ativação neutrônica, através da irradiação de folhas de ouro com e sem cobertura (nuas) de cádmio. [1,2,3], posicionadas no interior do núcleo do reator IPEN/MB-01. O valor médio do fluxo de nêutrons e por conseqüência de potência obtido é correlacionado com o valor médio de corrente dos canais nucleares 5 e 6, bem como o valor médio da taxa de contagem do canal 10, respectivamente câmaras de ionização compensada e detector de B-10. Tais medidas são obtidas a partir da irradiação das folhas de ouro a 100 watts de potência, valor este estimado pela técnica de análise por ruído neutrônico em relatório anterior de comissionamento


  • IPEN-DOC 25042

    DINIZ, RICARDO . Comissionamento : previsão de massa crítica do núcleo do reator IPEN/MB-01 tipo placa. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-RMB-005-00-RELT-080-01). Restrito.

    Título do projeto: Reator Multipropósito Brasileiro (RMB)

    Abstract: Este relatório de comissionamento apresenta um procedimento experimental para a previsão de massa crítica do núcleo do reator IPEN/MB-01 com elementos combustíveis tipo placa, utilizandoa técnica do inverso da multiplicação subcrítica (1/M).


  • IPEN-DOC 25041

    MURA, LUIZ E.C. . Comissionamento : procedimento de teste de queda das barras de controle no reator IPEN/MB-01 (teste integrado do MAB com as barras de controle). São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-RMB-005-00-RELT-077-00). Restrito.

    Título do projeto: Reator Multipropósito Brasileiro (RMB)


  • IPEN-DOC 25040

    MURA, LUIZ E.C. ; BITELLI, ULYSSES D. . Comissionamento : procedimento para o carregamento e descarregamento dos elementos combustíveis do núcleo do reator IPEN/MB-01. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-RMB-005-00-RELT-075-00). Restrito.

    Título do projeto: Reator Multipropósito Brasileiro (RMB)

    Abstract: Este relatório descreve o procedimento para o comissionamento das operações de carregamento e descarregamento dos elementos combustíveis do núcleo do Reator IPEN/MB-01


  • IPEN-DOC 25036

    MURA, LUIZ E.C. . Comissionamento : procedimento para o recebimento, manuseio e estocagem de elemento combustível tipo placa novo no reator IPEN/MB-01. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-RMB-005-00-RELT-069-00). Restrito.

    Título do projeto: Reator Multipropósito Brasileiro (RMB)

    Abstract: Este procedimento de comissionamento trata do processo de recebimento e dos testes das operações de manuseio e armazenamento dos elementos combustíveis tipo placa novos no reator IPEN/MB-01. Também faz parte dos objetivos deste procedimento, testar a inserção ou retirada das Placas Combustíveis avulsas dos Elementos Combustíveis Desmontáveis e a inserção ou retirada das Placas nas Caixas de Estocagem de Placas.


  • IPEN-DOC 25035

    MOLNARY, LESLIE de . Arquivo meteorológico da torre A e torre D da CNAAA – período 2000-2017. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Julho, 2018. (IPEN-CEN-PSE-IPPG-006-00-RELT-001-00). Restrito.

    Título do projeto: Prestação de Serviços Tecnológicos

    Abstract: Esse documento apresenta uma análise do arquivo de dados meteorológicos da Central Nuclear Almirante Álvaro Alberto (CNAAA), localizada em Angra dos Reis (RJ), para o período de 2000 a 2017 e que será utilizado pela empresa Tetra Tech Brasil para avalizar o estudo de condições meteorológicas extremas (velocidade do vento, temperatura e precipitação) na área do Complexo de Manutenção Especializada (CME) do Estaleiro e Base Naval (EBN) que a Marinha do Brasil (MB) está construindo no município de Itaguaí (RJ). Devido à ausência de dados meteorológicos no local do empreendimento do EBN, foi informado à Tetra Tech que os dados meteorológicos a CNAAA podem, em primeira análise, ajudar a complementar as informações meteorológicas do estudo de condições meteorológicas extremas, uma vez que, os dados da CNAAA já são coletados a muitos anos pelo sistema de meteorologia, assim como, a distância entre a CNAAA e o EBN de cerca de 63 km e a localização de ambos os empreendimentos na faixa litorânea do Estado do Rio de Janeiro, assegura que os principais fenômenos de mesoescala e de grande escala sinótica podem ser assumidos atuando quase que ao mesmo tempo. As condições meteorológicas locais no EBN, que eventualmente possam apresentar algum mecanismo de circulação diferenciado gerado pela configuração topográfica e/ou disposição do empreendimento em relação à proximidade do oceano, que não apenas as características gerais das circulações de mesoescala e de escala sinótica na região, poderão ser melhor estudadas e caracterizadas quando da implementação e operação continuada do sistema de meteorologia da EBN. Eventualmente, esses mecanismos locais poderão potencializar algum dos parâmetros meteorológicos avaliados (velocidade do vento, temperatura e precipitação pluviométrica).


  • IPEN-DOC 25034

    YAMAGUCHI, MITSUO . Análise de criticalidade do transporte de elementos combustíveis do núcleo do reator IPEN/MB-01 tipo placa. São Paulo: Instituto de Pesquisas Energéticas e Nucleares - CEN, Setembro, 2018. (IPEN-CEN-PSE-CCN-008-00-RELT-001-00). Restrito.

    Título do projeto: Prestação de Serviços Tecnológicos

    Abstract: Este relatório apresenta a análise de criticalidade dos elementos combustíveis que serão transportados do Centro de Combustível Nuclear (CCN) para o prédio do Reator IPEN/MB-01. A análise foi feita com o sistema SCALE4.4a.


  • IPEN-DOC 25033

    CABRAL, F.V.; PELEGRINO, M.T.; SEABRA, A.B.; RIBEIRO, M.S. . Effects of methylene blue-mediated photodynamic inactivation associated to NO-releasing chitosan nanoparticles on cutaneous leishmaniasis in mice. In: INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 16th, June 08-13, 2017, Coimbra, Portugal. Abstract... 2017. p. 272-272.

    Abstract: Cutaneous leishmaniasis (C L) is a ehronie disease developed by parasites of the genus Leishmania that promotes destruetive.and ulcerated lesions. The available treatments are limited beeause of side effeets, resistanee and toxieity. Reaetive oxygen speeies and nitrie oxide (NO) are potentially toxic to these parasites; Photodynamie inaetivation (PDI) involves the generation af oxidative stress and has been explored as an altemative treatment once it is less expensive and no reports about resistanee have been describedY Additionally, several studies indicate that the administration of exogenous NO donors represents an interesting strategy against CL.3 The aim of this work was to explore the effects Df methylene blue (MB)-mediated PDI in assoeiation with encapsulated NO donors (S-nitroso-MSA) in chitosan nanoparticles (CSNPs) on CL in BALB/e mice using real time bioluminescence. Promastigotes of L. (L) amazonensis transgenie line expressing luciferase were used. Sixteen BALB/e miee were infected in the left footpad with 1.106 promastigotes. After 4 weeks, mice were randomly assigned to experimental groups (n=4): Control (non-treated), PDI (treated only with PDI), PDI+CSNP (submitted to PDI and S-nitroso-MSA-CSNPs) and CSNP (treated only with S-nitroso-MSA-CSNPs). PDI was administered in two sessions separated by 24 h and CSNPs (80 eM) were applied immediately after the second PDI session. PDI was performed using a red LED (0= 660 ± 22 nm), MB (100 IlM), irradiance of 100 mW/cm2 and radiant exposure of 150 J/cm2 • parasite burden was analyzed through luciferase deteetion by bioimaging in the first 96 h following treatment and every week during 4 weeks. Statistically significant differences were considered when p < 0.05. Test groups presented significant reduction in parasite load compared to control during all experimental period. Twenty-four-h after treatments, parasite burden was lower for PDI+CSNP group but no statistically signifieant difference was observed when compared to other test groups. After 48 h, all test groups were similar. Besides, parasite load in test groups remained lower than control following 1, 2,3 and 4 weeks post-treatment. Under conditions used in this study, we conclude that CSNPs were not able to enhance MBmediated PDI efficiency in L. (L) amazonensis-induced CL in mice.


  • IPEN-DOC 25032

    NUNEZ, SILVIA C.; BAPTISTA, ALESSANDRA; GARCEZ, AGUINALDO S.; MARTINS, RODRIGO A.L.; RIBEIRO, MARTHA S. . The role of light irradiance on methylene blue photodegradation dynamics: is all light equal?. In: INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 16th, June 08-13, 2017, Coimbra, Portugal. Abstract... 2017. p. 252-252.

    Abstract: Methylene blue (MB) is a well-known photosensitizer (Ps) commonly used for antimicrobial photodynamic therapy (aPDT). Usually aPDT paramenters evaluation involves Ps concentration, its quantum yield for singlet oxygen production (Type II reaction) and the Ps photobleaching rate as a function of the deliveried fluence plus oxygen concentration and consumption on the medium. The role of power density is not often consider.The aim of this study is to evaluate the role of power density over MB photobleaching dynamcs evaluating the dimer/monomer ratio as well as the leuco MB formation under discrete changes in power density keeping the same light fluence. The MB was irradiated using a À = 660nm diode laser (TwinLaser, MMOptics, São Carlos, Brazil), 40mW adjustable from 10 to 10mW, 0.04cm2 • The powers of 10mW, 20mW, 30mW and 40mW were used for 300s, 150s, 100s and 75s respectively. The irradiations were carried out directly in a cover quartz cuvette with an optical path of 1 em. An acrylic mask was made to ensure the coincidence between the irradiation and the reading points. The readings were made from À = 200nm to À = 700nm and analyzed in appropriate software. The DA (dimer absorption) /MA (monomer absarption) was calculated and the ratio between visible and ultraviolet absorption was aIs o calculated. Figure 1 show the result afDA/MA for the different irradiances. Our results demonstrated that discrete changes in light irradiance leads to different dinamiccs . terms ofphotobleaching and DAIMA ratio.


  • IPEN-DOC 25031

    DIMMER, JESICA; CABRAL, FERNANDA V. ; SABINO, CAETANO P. ; NUNEZ MONTOYA, SUSANA C.; CABRERA, JOSE L.; RIBEIRO, MARTHA S. . Photoinactivation of Leishmania amazonesis by natural anthraquinones. In: INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 16th, June 08-13, 2017, Coimbra, Portugal. Abstract... 2017. p. 195-195.


  • IPEN-DOC 25030

    BAPTISTA, A.; NUNEZ, S.C.; MARTIN, A.A.; RIBEIRO, M.S. . Identification of important cellular targets for antimicrobial photodynamic therapy in yeast cell through FT-IR spectroscopy. In: INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 16th, June 08-13, 2017, Coimbra, Portugal. Abstract... 2017. p. 175-175.


  • IPEN-DOC 25029

    SABINO, CAETANO P. ; BAPTISTA, MAURICIO da S.; RIBEIRO, MARTHA S. ; LINCOPAN, NILTON. Methylene blue uptake and intermolecular interactions in microbial cells through Fluorescence Lifetime Imaging Microscopy (FLIM). In: INTERNATIONAL PHOTODYNAMIC ASSOCIATION WORLD CONGRESS, 16th, June 08-13, 2017, Coimbra, Portugal. Abstract... 2017. p. 82-82.

    Abstract: Antimicrobial photodynamic therapy (APDT) is a promising tool to counterattack the emerging treat of drug-resistant pathogens. The technique combines low-intensity monochromatic light with a photosensitizer compound to produce reactive oxygen species (ROS) that can damage virtually any type of biomolecules and lead to rapid ce\l death. Since some ROS present diffusion-limited reactivity, most cell damage is co-localized with photosensitizer accumulation site. Hence, imaging photosensitizer accumulation and fluorescence lifetime in the nanoscale can bring a great levei of information to further understand the ultrastructural cellular damage caused by APDT. In this study, we used a FLIM system capable of single-molecule detection to observe the accumulation and interaction sites of methylene blue (MB), a very broadly-used photosensitizer, in yeast, and Gram-positive and Gram-negative bacterial cells, Our data shows fluorescence lifetime contrast, with nanometric resolution, among different cellular structures such as cell wall, membrane and DNA. The images evidentiate differential MB accumulation in microbial cells and the existence of two different populations of MB molecular species: those interacting mostly with the solvent (short-lived, - 0.8 ns) and those interacting with biomolecules (Iong-lived, -2 ns), The short-lived fluorescence predominates in the mucoid capsule of Gram-negative bacteria and cell-wall ofyeast and Gram-positive bacteria while longlived MB fluorescence shows preferential accumulation in DNA-rich sites 1 • It is marked in yeast nucleus and exclusively inside bacterial cells. In fact, literature supports that MB intercalation in nucleic acids stabilizes its excited-states leading to increased "fluorescence "lifetime and efficiency of singlet-oxygen production2 . Our data brings evidence that this sOli of phenomena can be observed by FLIM in the nanoscale and this should bring new insights to the photophysical, photochemical and biological mechanisms of photodynamic therapy.


  • IPEN-DOC 25028

    INTERNATIONAL ATOMIC ENERGY AGENCY (Ed.); BALLINGER, J. (Colab.); BRUCHERTSEIFER, F. (Colab.); DOLLÉ, F. (Colab.); FUKUMORI, N. (Colab.); JALILIAN, A. (Colab.); KRASIKOVA, R. (Colab.); KVATERNIK, H. (Colab.); LYASHCHENKO, S. (Colab.); OCAK, M. (Colab.); OSSO, J. (Colab.); PANDEY, U. (Colab.); SEIMBILLE, Y. (Colab.); TODDE, S. (Colab.) . Quality control in the production of radiopharmaceuticals. Vienna: International Atomic Energy Agency, 2018. 150 p. (IAEA TECDOC series, 1856).

    Abstract: Radiopharmaceuticals are central to nuclear medicine applications for the diagnosis and therapy of human diseases, especially cancers and cardiovascular diseases. In the past few decades, advances in the production and quality control of emerging radiopharmaceuticals have led to the production of new radiopharmaceuticals and the availability of new production routes and methods for existing agents. Various new diagnostic agents in the field (such as 68Ga radiopharmaceuticals and generators) as well as therapeutic agents (such as alpha emitters) have already been added to the clinician toolkit. However, the lack of generic and peer-reviewed quality control guidelines and recommendations for their application in human patients is a major concern. To address this need, and in response to requests from Member States and professional societies, the IAEA developed this publication on quality control in the production of radiopharmaceuticals. It is expected to be of use for all professionals involved in the production and quality control of radiopharmaceuticals worldwide. This publication is an outcome of the work of an international team of experts in the field between 2016 and 2018. The IAEA wishes to thank the experts for their contributions. Special thanks are due to J. Ballinger (United Kingdom) for compiling the material, and J.S. Vera Araujo (Bolivarian Republic of Venezuela) for her editorial support. The IAEA officer responsible for this publication was A.R. Jalilian of the Division of Physical and Chemical Sciences.


  • IPEN-DOC 25027

    BUSTILLOS, OSCAR V. . A espectrometria de massas e a química analítica. Revista Analytica, v. 16, n. 96, p. 36-37, 2018.


  • IPEN-DOC 25024

    VIEIRA, A.; SAMAD, R.E. ; VIEIRA JUNIOR, NILSON D. ; ROSSI, WAGNER de . Ablação a laser com pulsos ultracurtos do aço DIN 16MnCr5: um estudo do processo de furação / Laser ablation with ultrashort laser pulses in steel DIN 16 MnCr5: a study of drill process. In: CONGRESSO BRASILEIRO DE ENGENHARIA DE FABRICACAO, 9., 26-29 de junho, 2017, Joinville, SC. Anais... Rio de Janeiro, RJ: Associação Brasileira de Engenharia e Ciências Mecânicas, 2017.

    Abstract: A indústria automobilística tem como um de seus principais desafios, e consequentemente, foco de pesquisa, a redução do coeficiente de atrito entre alguns componentes e sistemas presentes nos automóveis. Um dos grandes benefícios dos avanços nesta área é o aumento da vida útil dos componentes e a melhor eficiência do motor. Desta maneira, uma das formas propostas pela tribologia para a redução de atrito é a texturização de superfícies por laser. Neste trabalho, foi abordada a interação de pulsos laser de femtossegundos com o aço DIN 16MnCr5, utilizado na indústria automotiva. Objetivou-se buscar os melhores parâmetros de processo para obter micro cavidades com pouca ou nenhuma zona afetada pelo calor e sem a presença de rebarbas e material ressolidificado, presentes na texturização com laser de pulsos longos (nanossegundos). Para a realização do estudo foi utilizada a técnica de escaneamento diagonal, D-Scan, para determinação dos limiares de ablação em função da sobreposição de pulsos. Também foram realizados estudos de formação das cavidades com a variação da posição do ponto focal e do perfil espacial do feixe laser. São apresentados resultados de análises obtidas por microscopia óptica e de varredura e interferometria de luz branca.


  • IPEN-DOC 25025

    HERRERA, CRISTHIANO C. ; SAMAD, RICARDO E. ; VIEIRA JUNIOR, NILSON D. ; ROSSI, WAGNER de . Development and control of microfluidic systems. In: WORKSHOP INFO, 1., 01 de julho, 2017, Recife, PE. Resumo expandido... 2017.

    Abstract: The first stage of the project was to perform tests for controlled and optimized machining of BK7 optical glass by femtosecond laser. Parameters such as energy, overlapping pulses, and the focal position variation were investigated for a better extraction of the material. Microchannels, microvalves, micropumps, mixers, reactors, heaters and other components were developed to compose applied microfluidic systems. Microchannels built in BK7 glass separated by a PDMS film form the basis of the microfluidic circuits. The reagent flow control is done by pneumatic mini-valves controlled by an Arduino microcontroller through a Labview platform. This work shows the components developed and two microfluidic systems created. The first contains a microfluidic circuit capable of replicating enzyme-linked immunosorbent assays (ELISA) with a much lower cost of materials. The second has a microfluidic circuit for the production of NaYF4 fluorescent nanocrystals specially used as markers in images of biological systems.


  • IPEN-DOC 25026

    GOMES, MAURILIO P. ; SANTOS, IGOR P. dos ; COUTO, CAMILA P. ; MUCSI, CRISTIANO S. ; COLOSIO, MARCO A.; ROSSI, JESUALDO L. . Têmpera ao ar de insertos de assentos de válvulas obtidos com aço ferramenta AISI D2. In: CONFERENCIA BRASILEIRA SOBRE TEMAS DE TRATAMENTO TERMICO, 8., 21-24 de maio, 2017, Indaiatuba, SP. Anais... 2017.

    Abstract: A obtenção de insertos de assentos de válvulas por metalurgia de pó usando uma mistura de pó de ferro e aços rápidos ou aços ferramenta está atendendo os requisitos para a substituição do cobalto e chumbo em peças comerciais, visando a redução de custo e evitando a toxicidade do chumbo. O objetivo do presente trabalho foi o de tratar termicamente e caracterizar os insertos de assentos de válvulas sinterizados obtidos utilizando-se uma mistura de pós. Essa mistura de pós foi constituída pelo aço ferramenta AISI D2, ferro, sulfato de manganês, carboneto de nióbio, grafite, estearato de zinco e cobre. O ciclo de temperatura da têmpera ao ar foi determinado por meio do termopar tipo k acoplado a um sistema de aquisição de dados. As propriedades físicas e mecânicas foram medidas em relação à dureza aparente dos insertos, densidade aparente e a sua resistência à ruptura radial. A caracterização microestrutural foi realizada utilizando-se a microscopia óptica, microscopia eletrônica de varredura e espectroscopia por dispersão de energia. Os insertos temperados ao ar e duplamente revenido a 500 °C mostraram os melhores resultados no que tange a dureza e resistência à ruptura radial.


  • IPEN-DOC 25022

    PERES, JOSE C.G.; HERRERA, CRISTHIANO da C. ; ROSSI, WAGNER de ; VIANNA JUNIOR, ARDSON dos S.. Analysis of a microreactor for synthesizing nanocrystals by computational fluid dynamics. In: WORLD CONGRESS OF CHEMICAL ENGINEERING, 10th, October 01-05, 2017, Barcelona, Spain. Proceedings... 2017.

    Abstract: A microreactor designed to synthesize nanocrystals was built applying laser pulses with duration of femtoseconds in a quartz board. This precise machining technology allowed dimensioning the microchip cross section as a trapezoidal shape with base lengths of 120 μm and 200 μm and depth of 150 μm. The microchip is comprised of four inlets for reactants, a mixing section with 40 curves after the inlet section to ensure proper mixing of the species and 22 serpentine channels, with 22,000 μm length each, to allow crystal growth. Flow field throughout the microchip was investigated by computational fluid dynamics considering inlet flow rates between 12.5 and 2000 μL min-1. Hexahedral meshes were used to discretize the geometry as its cross section is uniform and to reduce the total number of elements. Advection terms were solved by the high resolution scheme. Numerical solutions were converged when the maximum residual value was less than 10-4 and the domain imbalance was less than 1%. Flow throughout the channels is laminar as the maximum Reynolds number observed is 850. The tridimensional velocity profile is a paraboloid whose vertex is influence by the centrifugal force: at the curved sections, such force accelerates flow towards the outer part of the channels, moving the maximum velocity point to this zone. The centrifugal force also creates secondary flows. These structures enhance mixing in the direction perpendicular to the main flow and behave like turbulent flows in macroscopic systems, allowing proper mixing without additional power consumption. Proper coupling between microchip geometry and its operating conditions was verified by simulating the dispersion of a non-reactive tracer injected in one of the inlet ports while feeding the others with water. For low flow rates, the tracer flows parallel to the water stream up to half of the mixing section and full mixing occurs after the second serpentine channel. For flow rates higher than 250 μL min-1, it shows secondary fluxes are intensified and promote mixing after both the third curve at the mixing section and at the beginning of the serpentine channels after the fourth reactant inlet, ensuring better conditions if the desired reaction is limited by contact between the reactants.


  • IPEN-DOC 25016

    BRASCHI, GIOVANI F.; EIRAS, JOSE A.; BARBOSA, PATRICIA A. ; ROSSI, WAGNER de ; CARNEIRO, MARCELO B. . Desenvolvimento de material em gradação funcional de metal duro e aço rápido para ferramenta de corte / Development of functionally graded material of cemented carbide and high speed steel for cutting tool. In: CONGRESSO BRASILEIRO DE ENGENHARIA DE FABRICACAO, 9., 26-29 de junho, 2017, Joinville, SC. Anais... Rio de Janeiro, RJ: Associação Brasileira de Engenharia e Ciências Mecânicas, 2017.

    Abstract: Material em gradação funcional (Functionally Graded Material – FGM) tem sido considerado como uma nova classe de material, na qual materiais com propriedades distintas são unidos na forma de um gradiente, formando uma unidade estrutural com propriedades não uniformes. O objetivo deste trabalho é apresentar a caracterização de amostras em gradação funcional de metal duro e aço rápido. Para tanto, foram utilizados pós de metal duro (K20) e aço rápido (T6), que foram sinterizados por uma técnica comumente conhecida como SPS (Spark Plasma Sintering). A caracterização foi feita a partir da avaliação da microestrutura em microscópio laser confocal e eletrônico de varredura, determinação da densidade relativa pelo princípio de Arquimedes e avaliação do perfil de dureza Vickers ao longo seção transversal das amostras. Os resultados mostraram uma microestrutura com ausência de trincas de origem térmica, com maior valor de densidade relativa de 98,70% e com variação no perfil de dureza ao longo da espessura da amostra, o que evidencia propriedades não uniformes.


  • IPEN-DOC 25023

    LARA, J.A.C.; COUTO, C.P. ; COLOSIO, M.A.; ROSSI, J.L. ; ABBADE, L.M.. Influence of spot welding parameters on Al-Si coated 22MnB5 for automotive application. SAE Technical Paper, n. 2017-36-0225, p. 1-6, 2017. DOI: 10.4271/2017-36-0225

    Abstract: The application of press hardening steels (PHS) Al-Si coating has been increasing in body in white vehicles as an approach to meet the demands of safety and CO2 reduction regulations. The vehicle structures with PHS largely depend on the integrity and the mechanical performance of the spots weld. During the spot welding process, intermetallic phase may appear in function of the chemical composition of the steel and coating. One of these intermetallics is the Fe-Al phase which brittleness decreases the strength of the weld joint. In this study, resistance spot welding (RSW) experiments were performed in order to evaluate the influence of the welding parameters of single-lap joints PHS - 22MnB5 steel grade. Welded samples of the Al-Si coated PHS steel as received, i.e., before any heat treatment and stamping, were evaluated by means of glow discharge optical emission spectroscopy (GDOES) technique that allows a quick and accurate evaluation of the chemical composition profile along the spot weld thickness. The GDOES results showed that the squeeze welding parameter has the higher influence on cupper diffusion at the Al-Si-Fe layer. The pre-burn current and welding current showed the higher influences in Fe-Al diffusion. The pulse technique and post-heat treatment had had the lower influences in Fe-Al diffusion.


  • IPEN-DOC 25013

    GOMES, MAURILIO P. ; SANTOS, IGOR ; COUTO, CAMILA ; MUCSI, CRISTIANO ; ROSSI, JESUALDO L. ; COLOSIO, MARCO. P/M valve seat inserts: air quenching and characterization. SAE Technical Paper, n. 2017-01-5014, 2017. DOI: 10.4271/2017-01-5014

    Abstract: This work consists of evaluating the influence of heat treatment on sintered valve seat insert (VSI) obtained with two different highspeed steels powders and one tool steel: AISI M3:2, AISI M2 and AISI D2, respectively. The high-speed / tool steel powders were mixed with iron powders and additives such as manganese sulphide, zinc stearate, graphite and niobium carbide. All the high-speed / tool steel powders had its particle size distribution and morphology analyzed. The heat treatment of the VSI consisted of air quenching followed by double tempering it in seven different and equidistant temperatures, ranging from 100 °C until 700 °C. A data acquisition system with a thermocouple type k attached to the samples was used to determine the air-quenching cooling rate. The mechanical and physical properties measurements were carried out, i.e., apparent density, apparent hardness and crush radial strength. The microstructural evaluation consisted of etching the VSI and then analyzing it using scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results showed that the VSI obtained with the AISI M3:2 and M2 high-speed steel powders mixtures showed the best results regarding its apparent hardness and crush radial strength after air quenching and double tempering it at 600 °C.


  • IPEN-DOC 25012

    ROCHA, FLAVIO R. ; ANGELINI, MATHEUS ; HENRIQUES, HELOISE R.; SOARES, JOSIANE S. ; SILVA, PAULO S.C. ; FAVARO, DEBORAH I.T. . Metal and trace element assessment in bottom sediments from medium Tietê River Basin, by INAA and ICP OES techniques. In: INTERNATIONAL NUCLEAR CHEMISTRY CONGRESS, 5th, August 27 - September 01, 2017, Gothenburg, Sweden. Abstract... 2017. p. 104-104.


  • IPEN-DOC 25011

    BORDON, L.; KRUPINSKI, A.; SILVA, J.M.; FAVARO, D. ; GUSSO-CHOUERI, P.; ABESSA, D.M.; CAMPOS, B. de. Metal bioaccumulation and Metallothioneins induction in blu crabs Callinectes danae exposed to lead (Pb). In: SETAC LATIN AMERICA BIENNIAL MEETING, 12th., September 07-10, 2017, Santos, SP. Abstract... 2017. p. 20-20.


  • IPEN-DOC 25021

    BARABAS, ROBERTA de C. ; SABUNDJIAN, GAIANE . The use of a neuroscience-based methodology to demystify and teach about the benefits of the nuclear field: neuroscience applied to nuclear energy teaching. In: SIMPOSIO INTERNACIONAL SOBRE EDUCACION, CAPACITACION, EXTENSION Y GESTION DEL CONOCIMIENTO EN TECNOLOGIA NUCLEAR, 2., 13-17 de novembro, 2017, Buenos Aires, Argentina. Anais... 2017.

    Abstract: Science, technology and innovation play an essential role in helping countries increase the quality of life they offer their citizens. Since the discovery of nuclear fission in the 30s, the peaceful applications of nuclear technology have benefited several fields. Improved crops, preservation of food, health advance – specially for the diagnosis and treatment of cancer –, environment protection and a stable supply of energy can be cited as contributions of nuclear technology for global wellbeing. Despite its benefits the nuclear energy is still addressed with prejudice. Accidents in nuclear field have contributed for its negative image. Prejudice against nuclear energy lead to misconceptions on the theme, which interfere with authorities’ decision on the development of new nuclear technology. Education is the starting point for public acceptance of nuclear technology. Educational neuroscience is an emerging scientific field that explores the interactions between biological processes and education and helps identify and change implicit associations. This paper aims to demonstrate how the previous knowledge may interfere with the implicit associations towards a source of energy. The first steps of a neuroscience-based methodology in progress are presented in this paper: a) a pretest with specialists of the nuclear field; b) a subsequent test with lay subjects; and c) comparison of the results from the pretest and test. A future step consists of applying neuroscience principles to Brazilian science teachers to identify and modify implicit attitudes towards nuclear technology to promote an assertive teaching-learning process The global educational scenario has demonstrated absence of neuroscience-based methods for the nuclear technology teaching and that represents an opportunity for developing strategic teaching methods that will help demystifying the theme consequently improving public acceptance of this type of technology. Once the real scenario is demystified, the population will have a broad vision of all contributions of the nuclear field.


  • IPEN-DOC 25020

    CARDOSO, ELIZABETH C.L. ; OLIVEIRA, RENE R. ; MACHADO, GLAUSON A.F. ; MOURA, ESPERIDIANA A.B. . Study of flexible films prepared from PLA/PBAT blend and PLA E-beam irradiated as compatibilizing agent. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JLAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 121-129, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_14

    Abstract: Plastics global annual production exceeds 250 million tons and more than 40% of the total plastic production is used as packaging materials. In recent years polymeric materials derived from biomass have received great attention due to scarce petroleum resources and environmental concerns. PLA is one of the most extensively studied bio-based and bio-compostable aliphatic polyesters; nevertheless, high brittleness and low toughness limits its application. Blending PLA with PBAT (Poly(butylene adipate-co-terephthalate)), an aliphatic-aromatic copolyester, was the solution found due to its high toughness and biodegradability. Differences between PLA and PBAT solubility parameter values lead to the formation of immiscible blends as well as reduction in their mechanical performance besides a poor morphology; so, 5% of pre-irradiated PLA and a previous compatibilized PLA/PBAT (EcovioTM) were added to PLA/PBAT blends in order to improve miscibility phases. Investigations were accomplished on phase morphology (SEM), mechanical properties, thermal behavior and X-ray diffractions (XRD).


  • IPEN-DOC 25019

    BENTO, R.T.; CORREA, O.V. ; FERRUS FILHO, A.; PILLIS, M.F. . Estudo quantitativo do processo de degradação térmica de fibras de aramida. In: SIMPOSIO DE ANALISE TERMICA, 8., 13-15 de agosto, 2017, Ponta Grossa, PR. Resumo... 2017. p. 45-45.

    Abstract: Fios de aramida são fibras têxteis de alto desempenho, apresentando excelentes propriedades físico-químicas que favorecem a sua utilização em aplicações onde há a necessidade de tecnologia avançada. O presente trabalho tem como objetivo principal o estudo e análise quantitativa do comportamento de dois tipos diferentes de fio de aramida – 1100 dTex e 3300 dTex – durante o processo de degradação térmica, por meio da técnica de análise termogravimétrica (TGA). Para caracterização estrutural, morfológica e composição química das amostras foram realizados ensaios de microscopia eletrônica de varredura (MEV), espectroscopia de energia dispersiva (EDS) e difração de raios-X (DRX). Os resultados obtidos demonstraram que as fibras de aramida apresentam estrutura cristalina, exibindo uma morfologia superficial homogênea e de baixa rugosidade. Verificou-se que as fibras em estudo possuem boa estabilidade térmica. A decomposição térmica dos fios de aramida 1100 dTex ocorre no intervalo de 493ºC – 629 ºC, enquanto que a degradação térmica da aramida 3300 dTex se inicia a aproximadamente 504ºC e se completa em torno de 644ºC, o que permite concluir que a aramida 3300 dTex é dotada de excelente resistência térmica, quando comparada a outros materiais têxteis.


  • IPEN-DOC 25018


    Abstract: Boronizing is a thermo-chemical process consisting on the diffusion of the chemical element boron into metallic substrates, aiming at producing on the metal surface a closed layer of borides, which are elements extremely hard and chemically inert. Steels, for example, exhibit substantially higher hardness values (1,600 to 2,000HV) than nitrided steels (650 to 900HV) due to the formation of iron borides. The combination of high hardness and low friction coefficient of this boride layer greatly contributes to endure the main mechanisms of wear: adhesion, abrasion and superficial contact fatigue. The use of the boronizing process, however, is limited due to the elevated process temperatures. To overcome this limitation, recent studies pointed to the use of rare earth elements as catalysts of the process. This work will present the state of the art of these developments.


  • IPEN-DOC 25017

    LAPA, NELBIA; MARTINS, LUIZ C.; MADEIRA, ALZIRA; WELLELE, OLIIVER; SABUNDJIAN, GAIANE; LEE, SEUNG ; STEINROTTER, THOMAS. Simulation of a station black out at the Angra 2 NPP with Melcor Code. In: TECHNICAL MEETING ON THE STATUS AND EVALUATION OF SEVERE ACCIDENT SIMULATION CODES FOR WATER COOLED REACTORS, October 09-12, 2017, Vienna, Austria. Proceedings... Vienna, Austria: International Atomic Energy Agency, 2017.

    Abstract: The interest in evaluating the level of resistance of a nuclear power plant in response to an accident that exceeds the project bases, increased significantly after the Fukushima-Daiichi accident. Melcor is an integrated code, developed by Sandia National Laboratories, used to model and simulate the evolution of severe accidents in nuclear power plants. The Melcor modeling is general and flexible, making use of a “control volume” approach in describing the thermal hydraulic response of the plant. Reactor-specific geometry is imposed only in modeling the reactor core. The reactor cooling circuit and the four SG are represent by two model-loops, a single loop with the pressurizer and an agglutinated triple loop. All active safety systems which depend on AC power are assumed to be unavailable in this analysis. The most important strategies assumed were primary side depressurization and additional makeup water to reactor coolant system. The passive severe accident management measures primary bleed, secondary side bleed, passive injection from feedwater system and firefighting pool available. In Brazil there is the Almirante Álvaro Alberto Nuclear Power Plant that has two plants in operation, and one of them is Angra 2, which started operating in 2001. This unit is a pressurized water reactor type with electrical output of about 1350 MW. The objective of this work is to present a summary of the severe accident caused by a station black out condition using the Melcor 1.8.6 code. The main result of the study is an evaluation of RPV lower head integrity during a severe accidents scenario. The results will be useful to an independent assessment into the detailed processes involved by the management guidelines for one scenario severe accident in Angra 2.


  • IPEN-DOC 25015

    SILVA, ANDRE F. ; COSTA, PRISCILA ; MACHADO, NOE G.P. ; SAMAD, RICARDO E. ; ZEZELL, DENISE M. ; RAELE, MARCUS P. ; ZAMATARO, CLAUDIA B. . Analysis of temperature on microscope slide by a boron pulsed laser deposition process. In: ENCONTRO DE OUTONO, 41., 06-11 de maio, 2018, Foz do Iguaçu, PR. Resumo... São Paulo: Sociedade Brasileira de Física, 2018. p. 1-1.

    Abstract: A boron thin ¯lm can be used for neutrons conversion and in electrically charged particles and further detection. Since boron has a high evaporation temperature and the thickness of the boron layer needs to have few microns, pulsed laser deposition also known as PLD can be used. When producing thin ¯lms with the PLD technique, the target absorbs energy promoting the material ablation creating a plasma plume that deposits material on a substrate, thus creating a thin ¯lm. Since all the deposition occurs in a vacuum chamber, the residual heat of the plasma that condensate at the substrate can build up, thus potentially source of concern if the substrate sensitive to temperature somehow. This work reports the analysis of the variation of temperature in a microscope slide (substrate) as a function of the energy of femtosecond laser pulses. For measuring the substrate temperature a type-K thermocouple was used together with associated electronics. The thermocouple was ¯xed to the back of substrate with thermal grease for vacuum and connected to the microchip using a feed through in the vacuum chamber. Was detected the increase of the substrate+¯lm starting at 6oC from initial temperature (room) for the minimal laser energy 100 microjoules (25 femtoseconds).


  • IPEN-DOC 25014

    FERREIRA, MERILYN ; PASK, HELEN; WETTER, NIKLAUS U. . Laser Raman intracavidade de Nd:YLF/KGW bombeado lateralmente emitindo em 1147 e 1163 nm. In: SIMPOSIO DE APLICACOES DE OPTICA E LASERS, 2., 04-06 de outubro, 2017, São José dos Campos, SP. Resumo... São José dos Campos: Instituto de Estudos Avançados, 2017.

    Abstract: Foi investigado neste trabalho um laser Raman intracavidade de Nd:YLF/KGW na configuração de bombeio lateral. Para a geração do laser fundamental foi usado um cristal de Nd:YLF bombeado por um diodo, emitindo em 792 nm, na configuração lateral gerando um comprimento de onda de 1053 nm. Como cristal Raman foi usado um KGW bombeado em suas duas linhas Raman principais, 768 cm-1 e 901 cm-1, conseqüentemente gerando dois comprimentos de onda Raman, 1147 e 1163 nm, respectivamente. Dentro da cavidade a densidade de potência do laser fundamental é muito alta, desta maneira a configuração Raman intracavidade irá produzir uma conversão Raman mais eficiente [1]. Aliando-se a isso as boas características do Nd:YLF em configuração lateral [2] fomos capazes de gerar uma potência de saída em 1163 nm de 4,85W em regime multímodo, correspondendo à uma eficiência diodo-Raman de 12,2%, a eficiência diodo-Raman em modo TEM00 alcançou 7,5%. Para a emissão em 1147 nm foi atingido 1,47W de potência de saída com uma eficiência diodo-Raman de 3,7%. Até o momento não encontramos um laser Raman intracavidade de Nd:YLF/KGW em bombeio lateral reportado na literatura.


  • IPEN-DOC 25010

    ACHUSIM-UDENKO, AMAUCHE C.; RENATA, COIDA D.S.; VALENZUELA-DIAZ, FRANCISCO R.; ONYEDIKA, GERALD O.; MOURA, ESPERIDIANA A.B. ; OGWUEGBU, MARTIN C.; VALENZUELA-DIAZ, GRACA. Preparation and characterization of clay exfoliation and vegetal fibre on properties of recycled low density polyethylene. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JLAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 429-437, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_47

    Abstract: This work aims to incorporate Mgbee clay, vegetal fibre ( Costus afer ) in recycled low density polyethylene (rLDPE). The incorporation of clay and vegetal fibre in rLDPE was carried out using a twin screw extruder machine and the nano composites were obtained. The nano composites were characterized by the Young’s modules test, tensile tests, bending test, XRD, SEM, DSC, and TG and other properties evaluated. The results of morphological and thermal properties showed a good interaction between the clay, and rLDPE as compared to neat rLDPE.


  • IPEN-DOC 25009

    COIADO, RENATA D.S.; LAZO, GISELE D.; OLIVEIRA, RENE R. ; RODRIGUES, RITA C.L.B.; MOURA, ESPERIDIANA A.B. . Polymer blend based on recycled polyethylene and ethylene vinyl acetate copolymers reinforced with natural fibers from agricultural wastes. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 689-697, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_76

    Abstract: Agricultural residues, which are produced with large quantities annually throughout the world, may be used as reinforcement plastic to replace the wood and produce particleboard for application in the development of low cost construction elements and reduced environmental impact. The main aims of this study was to investigate the effects of agricultural wastes and glass residues addition on the properties of recycled-HDPE/EVA blend for use in particleboard manufacture. The recycled-HDPE/EVA blend reinforced with corncob fiber (15 wt%), coffee parchment (15 wt%) and glass residues (1 wt%) were processed by melt extrusion, using a twin screw extruder and injection molding machine to obtain specimen test samples. The samples were characterized by mechanical test, XRD, TG, DSC, and FE-SEM analysis to understand the nature of interaction between the fillers reinforcement and recycled-HDPE/EVA blend matrix and their properties were discussed.


  • IPEN-DOC 25008

    ROVANI, SUZIMARA ; SANTOS, JONNATAN J. ; CORIO, PAOLA; FUNGARO, DENISE A. . Adsorption study of acid orange 8 dye using silica nanoparticles obtained from sugarcane ash. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, November 27-30, 2017, Guarujá, SP. Abstract... 2017.

    Abstract: Developing of new adsorbents becomes a very important need, especially because of the increase of contaminants present in rivers, oceans and any other water body capable of became potable. Biosorbents has a special feature, because they can solve two problems at the same time, once they are prepared from a natural source, giving a utility for wasted materials, and bioremediate a water body, adsorbing contaminants on their surface. In this context, the properties of a biosorbent prepared from sugarcane ash by surfactant mediated synthesis has been studied to the adsorption of acid orange 8 dye, a model molecule, aiming future applications for removal of emerging contaminants of water. According to the results of adsorption kinetic (Fig. 1A), the acid orange 8 dye removal was higher than 89% and 95% in 4 h of contact time for an initial concentration of 200 and 150 mg L-1, respectively. FTIR-ATR analyses (Fig. 1B) indicated the presence of bands: at 799 and 446 cm-1 are due to symmetric stretching of siloxane groups, at 1058 cm-1 is due the Si–O–Si asymmetric stretching, at 2925 cm-1 and 2850 cm-1 are due to the bending of –CH3 and –CH2, respectively, for silica-CTAB sample and additionally, at 1031, 689 and 641 cm-1 are due sulfur groups (S=O), out-of-plane deformation of ring and aromatics groups, respectively, of acid orange 8 dye. In TGA analysis (Fig. 1C), the peak between 150 to 235 °C for silica-CTAB sample has been attributed to the unbound CTAB less stabilized bonding sites on the silica surface due to hydrophobic– hydrophobic interactions of interdigitated CTAB and the peak around 256 °C indicates a stronger bonding of the surfactant to the silica surface due to the electrostatic binding of the ammonium cation head group to the electronegative silica surface [1]. For the silica-CTAB + dye sample, the substitution of the interdigitated CTAB of a second layer by dye was observed by the disappearance of the DTG peak between 150 to 235 °C. The displacement the DTG peak of 256 for 300 °C and appearance of the DTG peak around 435 °C are related to the dye adsorption. These aspects demonstrate the potential of silica nanoparticles obtained from sugarcane ash as new biosorbent for removal of organic compounds, such as, dye from aqueous solution and can be used to alleviate environmental problems.


  • IPEN-DOC 25007

    ROVANI, SUZIMARA ; SANTOS, JONNATAN J. ; CORIO, PAOLA; FUNGARO, DENISE A. . Surfactant mediated synthesis of silica nanoparticles using sugarcane ash waste as renewable source. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, November 27-30, 2017, Guarujá, SP. Abstract... 2017.

    Abstract: Green silica from renewable source can be used in very different materials, since addictive for construction materials or polymers to traditional products as glass, silicone rubber as well as source for silicon. Brazil is the world’s largest producer of sugarcane and generates huge amounts of sugarcane ash waste (SAW) which is a rich source of silica. This work investigates a method to produce pure silica nanoparticles from SAW. Initially, sodium silicate was obtained from sugarcane ash waste adapting the methodology published by Alves, et al., 2017. Subsequently, sodium silicate was added to a mixture of water/butyl alcohol (1:1) with 2.5% wt. of hexadecyltrimethylammonium bromide under constant stirring at 60 °C. Then, 0.5 mol L-1 sulfuric acid solution was added slowly to suspension until pH 4 and the resulting gel was aged at 60 °C for 8 h. The aged nanosilica gel was washed with distilled water, filtered and oven dried at 120 °C. The silica nanoparticles were characterized by different techniques. In the Figure 1 can be observed energy dispersive spectra (EDS) and transmission electron microscopy (TEM) images of sugarcane ash waste (A and B) and of silica nanoparticles (C and D). EDS of SAW shows the presence of several different elements (being Si, Fe, Al, P, Cl and S more abundant) and only Si and O were observed after synthesis procedure (Cu signal comes from TEM grid). Transmission electron microscopy image of samples exhibit a drastic alterations of the material size ranging from several micrometers (Fig. 1C) to less than 20 nm (Fig. 1D). The results indicate that was possible to obtain pure silica in a nano- size from waste material to reduce disposal and pollution problems.


  • IPEN-DOC 25006

    BENTO, RODRIGO T. ; OLIVEIRA, EDUARDO C. de ; SZURKALO, MARGARIDA ; CORREA, OLANDIR V. ; PILLIS, MARINA F. . Characterization and photocatalytic behavior of TiO2 thin films grown by MOCVD process. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, November 27-30, 2017, Guarujá, SP. Proceedings... 2017.

    Abstract: This research aims to evaluate the influence of the thickness on the photocatalytic behavior of TiO2 thin films grown at 400ºC by metalorganic chemical vapor deposition. Titanium dioxide films with 280 and 468 nm of thickness were grown on borosilicate substrates. The photocatalytic behavior was evaluated by monitoring the degradation of methyl orange dye under UV light for 2h. The results show that both films presented anatase crystalline phase and that increasing the thickness the grain size and the roughness were also increased. The best photocatalytic performance was attributed to the film of 468 nm of thickness that exhibited 40% of dye degradation after 2h under UV light.


  • IPEN-DOC 25005

    SZURKALO, MARGARIDA ; OLIVEIRA, EDUARDO C. de ; CORREA, OLANDIR V. ; BENTO, RODRIGO T. ; PILLIS, MARINA F. . Synthesis and characterization of TiO2 films obtained by sol-gel method. In: PAN AMERICAN CONGRESS OF NANOTECHNOLOGY, 1st, November 27-30, 2017, Guarujá, SP. Proceedings... 2017.

    Abstract: Borosilicate coated titanium dioxide thin films were produced by the sol-gel method. The films were calcinated at 450°C for 20 minutes for crystalization. X-ray diffration analyses show that before the heat treatment the film was amorphous and after that it crystallized in anatase phase presenting mean grain size of 34 nm and RMS roughness of 8 nm. The crystallized film was used as photocatalist in the degradation of methyl orange dye presenting an efficiency of 25% after 2h under UV light.


  • IPEN-DOC 25004

    SANTANA, JULYANA G. ; ORTIZ, ANGEL ; OLIVEIRA, RENE R. ; RANGARI, VIJAY K.; GUVEN, OLGUN; MOURA, ESPERIDIANA A.B. . Mechanical, thermal, morphology and barrier properties of flexible film based on polyethylene-ethylene vinyl alcohol blend reinforced with graphene oxide. In: IKHMAYIES, SHADIA (Ed.); LI, BOWEN (Ed.); CARPENTER, JOHN S. (Ed.); LI, JIAN (Ed.); HWANG, JIANN-YANG (Ed.); MONTEIRO, SERGIO N. (Ed.); FIRRAO, DONATO (Ed.); ZHANG, MINGMING (Ed.); PENG, ZHIWEI (Ed.); ESCOBEDO-DIAZ, JUAN P. (Ed.); BAI, CHENGUANG (Ed.); KALAY, YUNUS E. (Ed.); GOSWAMI, RAMASIS (Ed.); KIM, JEONGGUK (Ed.). Characterization of Minerals, Metals, and Materials. Gewerbestrasse, Switzerland: Springer International Publishing AG., 2017. p. 49-57, (The Minerals, Metals & Materials Series). DOI: 10.1007/978-3-319-51382-9_7

    Abstract: Ethylene-vinyl alcohol (EVOH) copolymers are widely used in the food packaging industry as gas barrier properties to oxygen, organic solvents, and food aromas. EVOH is very sensitive to moisture and its gas barrier ability deteriorates in high relative humidity conditions. This work aims to prepare flexible films based on melt-blending high density polyethylene (HDPE) and ethylene-vinyl alcohol (HDPE/EVOH/EVA blend) reinforced with graphene oxide (GO). The HDPE/EVOH/EVA/GO flexible films were prepared by twin-screw extrusion and blown film extrusion processing. The flexible films samples were characterized by tensile tests, TG, DSC and FE-SEM analysis and the correlation between properties was discussed. In addition, the oxygen permeability tests were performed at 23 °C, 0 and 90% relative humidity using an OX-TRAN (MOCON Inc.).


  • IPEN-DOC 25003

    IZIDORO, JULIANA de C. ; MIRANDA, CAIO da S. ; GUILHEN, SABINE N. ; FUNGARO, DENISE A. . Chemical, mineralogical and environmental characterization of combustion byproducts generated from mineral coal used for electricity production. In: INTERNATIONAL CONFERENCE ON MATERIALS CHEMISTRY, 13th, July 10-13, 2017, Liverpool, UK. Proceedings... Cambridge: Royal Society of Chemistry, 2017. p. 1-14.

    Abstract: The coal combustion by-products, bottom ash (BA), fly ash from cyclone filter (CA) and fly ash from bag filter (FA), generated in a Brazilian thermoelectric power plant, were characterized by Xray fluorescence, X-ray diffractometry and leaching and solubilization tests. The material retention systems used in the Brazilian power plant from where these by-produtcts were sampled are showed in Figure 1. The three types of coal ashes presented similar chemical composition, with a total content of main oxides (SiO2, Al2O3 and Fe2O3) above 72% and were classified as class F (according to ASTM). The analysis of ash enrichment factor showed that arsenic, zinc and lead concentrate mainly on FA, whereas the elements that presented the greatest enrichment in the bottom ash (BA) and therefore present low volatility are K and Mg. All ashes presented quartz, mullite and magnetite as crystalline phases. In the leaching and solubilization study, the FA sample was considered hazardous and classified according to Brazilian regulation as Class I solid waste, whereas CA and BA samples were considered non-hazardous and not inert solid wastes and classified as Class II-A. Therefore, FA sample from this Brazilian power plant must be discarded only after treatment or stringent disposal criteria must be followed to avoid contamination on site.


  • IPEN-DOC 25002

    VEGA, O. ; LOPES, P.R. ; AMARAL, P.O.; GONSCHOROWSK, G.; OLIVEIRA, J.P.; FABBRO, R.; MESQUITA, K.A.; GIMENEZ, M.P.; REDIGOLO, M. . Preparación de muestras del médio ambiente para análisis por médio de técnicas cromatograficas. In: SIMPOSIO LATINOAMERICANO DE QUIMICA ANALITICA Y AMBIENTAL, 12th, April 25-27, 2017, Manizales, Colombia. Proceedings... Bogotá, Colombia: Pontificia Universidad Javeriana, 2017.

    Abstract: Este artículo explora la ciencia de la preparación de muestras para matrices sólidas, líquidos y gases, utilizados en el laboratorio del Centro de Química y Medio Ambiente del IPEN. Extracción de neonicotinoides del agua por LLE (Liquid-Liquid Extraction), extracción de hidrocarburos aromáticos policíclicos (PAHs) del agua atraves de DLLME (Dispersive liquid - liquid micro extraction) y el uso de extracción en fase sólida SPE (Solid Phase Extraction) para el análisis de hormonas en agua son descritos. Limites de detección que utilizan estas técnicas son descritas en este trabajo.


  • IPEN-DOC 25001

    LEVY, D.S. ; SORDI, G.M.A.A. ; RODRIGUES, D.L. ; CARNEIRO, J.C.G. . Information and communication technologies for appropriate communication in the workplace. In: CONGRESO REGIONAL DE SEGURIDAD RADIOLOGICA Y NUCLEAR, 11th, April 16-20, 2018, La Habana, Cuba. Proceedings... 2018.

    Abstract: Brazil is one of the 5th largest countries on earth. It is geopolitically divided into five regions, with large between-country distances and plenty of radioactive facilities throughout the country. Professional continuing education is a must and a challenge. This paper discusses a web-based project designed to provide effective communication about occupational exposure, using creative, innovative and practical Internet solutions to link geographically distant workers to high-quality reliable information. This web-based-project counts on concepts, definitions and theory about radiological protection issues, such as optimization programs and ionizing radiation monitoring procedures. Moreover, the content presents discussions related to national and international recommendations, such as potential exposure, which is currently one of the most important research fields in radiological protection. Only few publications develop expressively the issue and there is still lack of knowledge and uncertainties. Risk definition itself can assume different meanings, even among scientific community. To respond to this challenge, this project discusses potential exposures through question-and-answer topics addressing particular attention to effective actions towards safety which can be incorporated into labor practice in the workplace. For discussions to be effective, all content is based on ICRP and IAEA valid recommendations and official reports, in addition to scientific papers published in major international congresses. This project aims to provide radioactive facilities reliable updated communication, to inform as many people as possible, contributing to develop workers´professional skills and to improve safety culture in workplace.


  • IPEN-DOC 25000

    LEVY, D.S. ; SORDI, G.M.A.A. ; RODRIGUES, D.L. ; CARNEIRO, J.C.G.G. . Information and communication about occupational exposure in workplace. In: SIMPOSIO INTERNACIONAL SOBRE PROTECCION RADIOLOGICA EN MEDICINA, August 20-24, 2017, Arequipa, Peru. Proceedings... 2017.

    Abstract: Medical applications of ionizing radiation are essential for protecting and improving human health. The radiological protection objective is to keep doses as low as reasonably achievable, maximizing dose reduction in order to obtain the necessary results for patients in diagnostic and interventional radiology, nuclear medicine and radiotherapy. There is plenty of information, published papers and studies about radiological protection for patients, regarding interventional radiology, nuclear medicine, radiotherapy, biomedical research, among others. Nevertheless, medical and paramedical personnel themselves are also exposed to radiological risks associated with the various uses of radiation in medicine. This paper discusses some considerations about radiological protection in workplace, as well as the need of more accurate information and communication about occupational exposure and potential exposures in medical practice. We believe that this type of information and communication will be helpful for exposed individuals knowingly while voluntarily helping - other than in their occupation - in the care, support or comfort of patients undergoing medical diagnosis or treatment and for visitors of the patients.


  • IPEN-DOC 24999

    MANTECON, JAVIER G. ; MATTAR NETO, MIGUEL . One-way fluid-structure interaction model to study the influence of the fluid velocity and coolant channel thickness on the stability of nuclear fuel plates+. In: ABCM INTERNATIONAL CONGRESS OF MECHANICAL ENGINEERING, 24th, December 3-8, 2017, Curitiba, PR. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Engenharia e Ciências Mecânicas, 2017.

    Abstract: In nuclear research reactors, the fuel elements are frequently composed of parallel, flat or curved plates. A major problem of that fuel element configuration is the hydraulic instability of the plates caused by high coolant velocities. Thin plates contain the fuel and they are separated by narrow channels through which the coolant flows to remove the heat generated. In this study, a numerical analysis was conducted to examine the fluid-structure interaction of a flat fuel plate bounded by two coolant channels. The loads caused by the fluid flow are calculated using a Computational Fluid Dynamics model implemented in ANSYS CFX, and the plate structural responses are determined using a Finite Element Analysis model implemented in ANSYS Mechanical. The goal of the present work is to estimate the amount of deformation of a fuel plate when there is an increment of the fluid velocity and a variation in the thickness of the coolant channels.


  • IPEN-DOC 24998

    SILVA, K.C.; GUILHEN, S.N.; IZIDORO, J.C. ; FUNGARO, D.A. . Removal of cadmium and zinc from aqueous solutions using zeolite synthesized from coal fly ash and industrial aluminium waste. In: ENCONTRO BRASILEIRO SOBRE ADSORCAO, 12., 23-25 de abril, 2018, Gramado, RS. Anais... 2018.

    Abstract: Coal fly ash can be used as a source of Silicon and Aluminum for 4A zeolite synthesis. It is necessary to consider the adequate proportion of Si / Al for the synthesis, so the aluminum waste from tertiary industry was used as an alternative and sustainable aluminum source. The synthesis was carried out by alkaline fusion followed by the hydrothermal treatment obtaining sodium aluminosilicate, which was then crystallized in NaOH solution. The samples were characterized by XRF, XRD and cation exchange capacity. The zeolite produced has the capacity to adsorb the Cd (II) and Zn (II) ions from aqueous solutions. The maximum adsorption capacity was 78.0 and 35.8 mg.g-1 for the Cd and Zn, respectively. The results showed that the aluminum waste and the fly ash together can be transformed into zeolite A, considered as value-added material and with promising adsorption properties.


Próxima página

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.

É possível efetuar a busca de um autor ou um termo em todo o RD, por meio do Buscar no Repositório , isto é, o termo solicitado será localizado em qualquer campo do RD. No entanto esse tipo de pesquisa não é recomendada a não ser que se deseje um resultado amplo e generalizado.

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.


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, .

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).



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.