Navegação IPEN por ano de publicação "2021"

Classificar por: Ordenar: Resultados:

  • IPEN-DOC 28451

    OLIVEIRA, ANDRESSA B.; FAGUNDES, JESSYCA L.A.; VEADO, HENRIQUE C.; FORTES, BEATRIZ N.A.; BITTENCOURT, ALEXANDRA A.; ADORNO, JOSE; CASTRO, MARCIO B.; VASQUEZ, PABLO A.S. ; SANTOS, PAULO S. ; DALLAGO, BRUNO S.L.; CAMPEBELL, RITA C.. Uso de pele de rã na cicatrização de feridas em equinos / Use of frog skin in wound healing in horses. In: SIMPOSIO INTERNACIONAL DO CAVALO ATLETA, 5., April 26-30, 2021, Online. Abstract... Belo Horizonte, MG: EV-UFMG, 2021.

    Abstract: A pele de rã (Rana catesbeiana) possui peptídeos com ação antimicrobiana, resistência mínima a perda de água e otimiza o processo cicatricial de feridas. Objetivou-se avaliar a cicatrização de feridas experimentais tratadas com pele de rã (GPR), desidratada e esterilizada com raios gama, comparando os achados clínicos e histopatológicos com feridas tratadas com ringer com lactato (GC). Utilizando-se cinco equinos saudáveis, foram realizadas feridas (3 x 3 cm), duas de cada lado da região lombar, distantes 7 cm, incluindo pele e subcutâneo, sendo que um lado foi realizado avaliação clínica e outro histopatológica, aleatoriamente. Durante o período experimental, realizaram-se avaliações e coletas para exame histopatológico nos dias 0, 3, 7, 14 e 21, e curativos diários no GC e troca de pele, a cada 3 dias no GPR. Observou-se o preenchimento total do leito da ferida por tecido de granulação no 14º dia, nos dois grupos e epitelização evidente em ambos grupos no 21º dia. As menores médias das áreas das feridas e as maiores taxas de contração foram observadas no GPR até o 7º dia. No entanto, nas aferições seguintes, o GC apresentou menores médias de área e maiores taxas de contração. Na avaliação histopatológica o GPR apresentou maior fibroplasia e neovascularização precoce até o 7º dia, mas posteriormente, notou-se essas características mais acentuadas no GC. Não foram observadas diferenças estatísticas entre os grupos estudados. De acordo com os resultados obtidos, a pele de rã possui precoce neovascularização e fibroplasia, podendo ser um potencial curativo biológico temporário em equinos.

    Como referenciar este item
    Icon

  • IPEN-DOC 28550

    RIBEIRO, MARTHA S. . Uso da luz na clínica odontológica para controle de contaminação. In: NUNEZ, SILVIA C. (Org.); GARCEZ, AGUINALDO S. (Org.); RIBEIRO, MARTHA S. (Org.). Aplicações clínicas do laser na odontologia. Barueri, SP: Manole, 2021. p. 424-431, cap. 18.

    Palavras-Chave: visible radiation; light sources; dentistry; coronaviruses; infectious diseases; lasers; diode tubes; oral cavity; ultraviolet radiation

    Como referenciar este item
    Icon

  • IPEN-DOC 28293

    ISHIMARU, G. ; SAIKI, M. . Use of tipuana tipu tree barks in active biomonitoring of atmospheric pollutants. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: air pollution monitoring; elements; monitoring; pollutants; pollution control; radioecological concentration; trees

    Como referenciar este item
    Icon

  • IPEN-DOC 28292

    ANDRADE, MARIANA N. ; OLIVEIRA, GLAUCIA C. ; CONTRIM, MARYCEL E.B. ; SENEDA, JOSE A. ; BUSTILLOS, OSCAR V. . Use of the ion exchange technique for purification of lithium carbonate for nuclear industry. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: enrichment; ion exchange; lithium; lithium carbonates; lithium compounds; nuclear industry; primary coolant circuits; purification; pwr type reactors; reactors; refrigeration

    Como referenciar este item
    Icon

  • IPEN-DOC 28970

    MACEDO, FERNANDA M. ; LANDULFO, EDUARDO . Use of SNOM for analysis of biomarker molecules when excited by Raman. In: WORKSHOP ON LIDAR MEASUREMENTS IN LATIN AMERICA, 11th, October 19-22, 2021, Punta Arenas, Chile. Abstract... Punta Arenas, Chile: Universidad de Magallanes, 2021. p. 27-27.

    Abstract: During the last decade, many studies have made significant progress in understanding the causes and implications of our environment, with respect to the atmosphere. Bioaerosols are fundamental in the reproduction of plants and microorganisms (pollen, spores, etc.), which in the atmosphere are transported across borders and long distances. For this reason, bioaerosols have great importance in genetic diffusion between habitats and biomas geographic change, contributing as main elements in the development, evolution and ecosystems dynamics. The consequences related to public health and agriculture are associated by the dispersion of plants, animals, pathogens and human allergens, showed an increase of allergies and asthma cases during storms, due to high concentrations of bioaerosols, especially when attributed to fungal spores. The biological content found in the air of global land surfaces corresponds to a quarter of the total particles found in the air, consisting mainly of proteins, arising from pollens, fungal spores, bacteria, viruses or fragments of plant or animal matter. Some proteins act as marker molecules which autofluoresce if excited at a specific wavelength. A signature of biomarker proteins, existing in the cell wall of fungal spores of medical interest, will be developed using scanning near-field optical microscopy (SNOM). This new high resolution optical methodology will allow detailed analysis of biomarker molecules (ergosterol, mannitol and arabitol), as well as their behavior when excited by Raman. In possession of a molecular standard, a database of these characteristics will be created, which will provide technical support for the remote Raman sensing of these species in the atmosphere of the Metropolitan Region of São Paulo (MRSP).

    Palavras-Chave: aerosols; optical microscopy; biological markers; atmospheres

    Como referenciar este item
    Icon

  • IPEN-DOC 27893

    SILVA, T.T. ; BORRELY, S.I. . Use of ionizing radiation for the inhibition and removal of cyanotoxins in water: a brief review. Brazilian Journal of Radiation Sciences, v. 9, n. 1A, p. 1-18, 2021. DOI: 10.15392/bjrs.v9i1A.1457

    Abstract: Cyanobacteria are an ancient and diverse group of microorganisms, considered as important contributors to the formation of Earth's atmosphere and nitrogen fixation. However, the input of nutrients in water by anthropogenic activities frequently provides cyanobacteria blooms associated with toxic compounds. Secondary metabolites, also called cyanotoxins, are often harmful to wild and domestic life, including humans. The first part of this review focuses on cyanobacteria and their ability to produce a variety of toxins as well as describe the Brazilian guidelines on the evaluation and management of these toxins in water quality. Then, we present a review of recent literature on the use of ionizing radiation in terms of cyanobacteria cell removal, degree of degradation of cyanotoxins in water, and reaction kinetics. In view of the exposed results, the paper concludes that ionizing radiation is an efficient and economically viable alternative for the remediation of areas contaminated by cyanobacterial blooms and cyanotoxins, especially in reservoirs intended for water treatment and supply. In addition, some suggestions are provided for further studies on the use of this technology in the treatment of drinking water.

    Palavras-Chave: comparative evaluations; cyanobacteria; drinking water; electron beams; gamma radiation; inhibition; radiation doses; removal; toxins; water treatment

    Como referenciar este item
    Icon

  • IPEN-DOC 28234

    LANA, J.G. ; KOIKE, A.C.R. ; VILLAVICENCIO, A.L.C.H. . Use of ionizing radiation as a technological and structural improvement in fresh and dehydrated Diospyros Kaki strong rama. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: cobalt 60; food processing; fruits; irradiation; preservation; radiation dose units; sterilization

    Como referenciar este item
    Icon

  • IPEN-DOC 27829

    SILVA, REJANE M.P. da ; IZQUIERDO, JAVIER; MILAGRE, MARIANA X. ; BETANCOR-ABREU, ABENCHARA M.; COSTA, ISOLDA ; SOUTO, RICARDO M.. Use of amperometric and potentiometric probes in scanning electrochemical microscopy for the spatially-resolved monitoring of severe localized corrosion sites on aluminum alloy 2098-T351. Sensors, v. 21, n. 4, p. 1-15, 2021. DOI: 10.3390/s21041132

    Abstract: Amperometric and potentiometric probes were employed for the detection and characterization of reactive sites on the 2098-T351 Al-alloy (AA2098-T351) using scanning electrochemical microscopy (SECM). Firstly, the probe of concept was performed on a model Mg-Al galvanic pair system using SECM in the amperometric and potentiometric operation modes, in order to address the responsiveness of the probes for the characterization of this galvanic pair system. Next, these sensing probes were employed to characterize the 2098-T351 alloy surface immersed in a saline aqueous solution at ambient temperature. The distribution of reactive sites and the local pH changes associated with severe localized corrosion (SLC) on the alloy surface were imaged and subsequently studied. Higher hydrogen evolution, lower oxygen depletion and acidification occurred at the SLC sites developed on the 2098-T351 Al-alloy.

    Palavras-Chave: aluminium alloys; corrosion; electrochemical corrosion; amperometry; probes; measuring instruments

    Como referenciar este item
    Icon

  • IPEN-DOC 27774

    NORY, RENATA M. ; FIGUEIREDO, ANA M.G. ; SOUTO-OLIVEIRA, CARLOS E.; BABINSKI, MARLY. Urban contamination sources in tunnel dusts from São Paulo city: elemental and isotopic characterization. Atmospheric Environment, v. 254, p. 1-14, 2021. DOI: 10.1016/j.atmosenv.2021.118188

    Abstract: Elemental and isotopic composition of tunnel dusts collected from Jânio Quadros (JQ) and Maria Maluf (MM) tunnels in São Paulo city were analyzed aiming to determine the potential sources of trace elements in these environments. Sampling was performed in the summer and winter of 2017. Elemental mass fractions were determined by Instrumental Neutron Activation Analysis (INAA) and Graphite Furnace Electrothermal Atomic Absorption Spectrometry (GF-AAS) for 28 elements. Isotopic signatures of Pb and Zn were determined by Thermal Ionization Mass Spectrometry (TIMS) and Multicollector Inductively Coupled Plasma Mass Spectrometry (MC-ICP-MS), respectively. The mean mass fractions of elements, such as Pb, Cd, Zn, Sb and Cu, were in general similar to the reported in the literature, in studies that demonstrated urban contamination by potentially toxic elements. Statistics demonstrated significant differences in mass fractions between the tunnels for most analyzed elements. Results showed that rare earth elements, U and Th, mostly associated with geogenic sources, presented higher concentrations in MM tunnels, while elements frequently related to vehicular emissions (Sb, Zn, Ba, Cu and Pb) presented mean mass fraction values higher in JQ tunnel, pointing to a more important contamination in JQ tunnel. No significant differences in the mass fractions between campaigns were observed, evidencing that tunnels are not much affected by external weather conditions. Pb isotopic analysis presented 206Pb/207Pb ratios between 1.1715 and 1.1791 and 208Pb/206Pb ratios between 2.0889 and 2.0961, which pointed out to a vehicular signature, related to tailpipe emissions. On the other hand, Zn isotope data also suggested a vehicular signature, but mostly related to the wear of tires and brakes. Grain size distribution analysis showed that the smallest fractions of dust contained, on average, about 10% of particulate matter of aerodynamic diameter smaller than 10 μm, fractions highly inhalable, what may be a concern to human health. Enrichment factors (EFs) showed that Cr, Zn, Cu, Cd, Pb and Sb are the most enriched elements, in both tunnels, but higher EFs were found for JQ tunnel. Principal Component Analysis revealed a profile for a crustal source, marked by U, Th and rare earth elements, whereas vehicular sources were characterized mostly by Pb, Ti and V from gasoline/diesel combustion; Pb and Ti from road paints; Sb, Ba and Zn from brakes, and Zn from wear of steel and tires. These results indicate an important anthropic impact in the tunnels and that vehicular traffic is the main source of potentially toxic elements.

    Palavras-Chave: absorption spectroscopy; contamination; dusts; elements; icp mass spectroscopy; isotope ratio; neutron activation analysis; toxic materials; tunnels; urban areas; x-ray diffraction; x-ray fluorescence analysis

    Como referenciar este item
    Icon

  • IPEN-DOC 27702

    GUILHEN, SABINE N. ; ROVANI, SUZIMARA ; ARAUJO, LEANDRO G. de ; TENORIO, JORGE A.S.; MASEK, ONDREJ. Uranium removal from aqueous solution using macauba endocarp-derived biochar: effect of physical activation. Environmental Pollution, v. 272, p. 1-10, 2021. DOI: 10.1016/j.envpol.2020.116022

    Abstract: The main aim of this study was to evaluate options for addressing two pressing challenges related to environmental quality and circular economy stemming from wastage or underutilization of abundant biomass residue resources and contamination of water by industrial effluents. In this study we focused on residues (endocarp) from Macaúba palm (Acrocomia aculeata) used for oil production, its conversion to activated biochar, and its potential use in uranium (U) removal from aqueous solutions. Batch adsorption experiments showed a much higher uranyl ions (U(VI)) removal efficiency of activated biochar compared to untreated biochar. As a result of activation, an increase in removal efficiency from 80.5% (untreated biochar) to 99.2% (after activation) was observed for a 5 mg L 1 initial U(VI) concentration solution adjusted to pH 3 using a 10 g L 1 adsorbent dosage. The BET surface area increased from 0.83 to 643 m2 g 1 with activation. Surface topography of the activated biochar showed a very characteristic morphology with high porosity. Activation significantly affected chemical surface of the biochar. FTIR analysis indicated that U(VI) was removed by physisorption from the aqueous solution. The adsorbed U(VI) was detected by micro X-ray fluorescence technique. Adsorption isotherms were employed to represent the results of the U adsorption onto the activated biochar. An estimation of the best fit was performed by calculating different deviation equations, also called error functions. The Redlich-Peterson isotherm model was the most appropriate for fitting the experimental data, suggesting heterogeneity of adsorption sites with different affinities for uranium setting up as a hybrid adsorption. These results demonstrated that physical activation significantly increases the adsorption capacity of macauba endocarp-derived biochar for uranium in aqueous solutions, and therefore open up a potential new application for this type of waste-derived biochar.

    Palavras-Chave: aqueous solutions; vegetable oils; vegetables; coconuts; uranium; adsorption; chemical activation; activated carbon; charcoal

    Como referenciar este item
    Icon

  • IPEN-DOC 27978

    WATANABE, TAMIRES ; GUILHEN, SABINE N. ; MARUMO, JULIO T. ; ARAUJO, LEANDRO G. de . Uranium biosorption by hydroxyapatite and bone meal. In: AZEVEDO, DIANA C.S. de (Org.); BASTOS-NETO, MOISES (Org.) ENCONTRO BRASILEIRO DE ADSORÇÃO, 13th, November 25 - December 3, 2020, Online. Anais... Fortaleza, CE: Imprensa Universitária, 2021. p. 714-718. DOI: 10.51996/9786588492529

    Abstract: Biosorption has been widely examined for the treatment of aqueous solutions containing uranium, a radiotoxic pollutant. The use of hydroxyapatite and bone meal as potential biosorbents in the removal of uranium (U) from aqueous solutions has not yet been previously addressed. In this work, the efficiency of these biosorbents in the removal of U was investigated according to their adsorption removal capacities. Surface transformations in both materials were observed after U adsorption by scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM/EDS). The biomass/U solution ratio was kept at 0.1 g/5 mL. Contact times for the batch experiments were 15, 30, 60, 120, and 180 min, and the concentration of U tested was 680 mg L-1. The equilibrium was achieved in less than 15 min for both materials. The morphological characteristics of each biomass, before and after biosorption experiments were analyzed. Bone meal highlighted slightly superior adsorption results in terms of maximum capacity (qmax = 33.83 mg g-1), compared to hydroxyapatite (qmax = 33.36 mg g-1), with the removal percentages being also similar, 99.97 and 98.57 %, respectively. The results so far indicate that these materials are potential biosorbents for the treatment of uranium-contaminated solutions, especially liquid radioactive waste.

    Palavras-Chave: adsorption; uranium; bone tissues; apatites

    Como referenciar este item
    Icon

  • IPEN-DOC 28367

    BIANCOLLI, ANA L.G. ; BARBOSA, ANDREY S. ; KODAMA, YASKO ; SOUZA JUNIOR, ROGERIO R. de; LANFREDI, ALEXANDRE J.C.; FONSECA, FABIO C. ; REY, JOSE F.Q.; SANTIAGO, ELISABETE I. . Unveiling the influence of radiation-induced grafting methods on the properties of polyethylene-based anion-exchange membranes for alkaline fuel cells. Journal of Power Sources, v. 512, p. 1-12, 2021. DOI: 10.1016/j.jpowsour.2021.230484

    Abstract: Anion-exchange membranes (AEM) are envisioned as the enabling materials for the widespread use of cost-effective and efficient polymeric fuel cells. Advancing the understanding of the effect of radiation-induced grafting (RIG) method on the final properties of AEMs is crucial to boost the performance of anion-exchange membrane fuel cells (AEMFCs). The present study provides a systematic investigation of the effect of RIG methods on physicochemical properties of LDPE-based AEMs with similar degree of grafting (DoG) and ion exchange capacity (IEC). Samples grafted by two methods − pre-irradiation (PIM) and simultaneous (SM) − have the same molecular structure, but distinct physicochemical properties due to markedly differences in the degree of crosslinking. Detailed characterization of AEMs showed that RIG method determines the mechanical properties, water transport, and the distribution of ionic groups, which have a direct impact on fuel cell performance and durability. The discussed results show that grafting step directly influences the internal structure and morphology. Controlling the synthesis parameters during RIG is a key feature to design AEMs with enhanced properties that lead to high AEMFC performance and stability.

    Palavras-Chave: ion exchange; anions; membranes; fuel cells; irradiation

    Como referenciar este item
    Icon

  • IPEN-DOC 28291

    PAIXAO, CLAUDIA M. ; VICENTE, ROBERTO ; ARAUJO, LEANDRO G. de . Tratamento de rejeito borra de petróleo pela técnica de pirólise com microondas. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: drying; industrial wastes; microwave equipment; natural radioactivity; petroleum residues; pyrolysis; sludges; toxicity; spheroids

    Como referenciar este item
    Icon

  • IPEN-DOC 28643

    GONCALVES, J.A.C. ; SOMESSARI, E.S.R. ; NAPOLITANO, C.M. ; SOMESSARI, S.L. ; BUENO, C.C. . Transit dose measurements using alanine and diode-based dosimeters. In: LATIN-AMERICAN CONGRESS ON SOLID STATE DOSIMETRY AND RADIATION MEASUREMENTS, 1st, September 13-17, 2021, Online. Resumo expandido... 2021.

    Palavras-Chave: radiation doses; accuracy; alanines; dosemeters

    Como referenciar este item
    Icon

  • IPEN-DOC 28197

    REIS, D.P. ; MOREIRA, E.G. . Trace elements in geophagus brasiliensis fish from the Billings Reservoir - Riacho Grande, SP/ Brazil. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: fishes; water reservoirs; calibration standards; elements; irradiation; neutron activation analysis; trace amounts

    Como referenciar este item
    Icon

  • IPEN-DOC 28064

    FUNGARO, D.A. ; SILVA, P.S.C. ; IZIDORO, J.C. ; HOWER, J.C.. Trace elements in coal, coal combustion products and soil from coal-fired power plant area evaluated by neutron activation analysis. Journal of Physics and Chemistry Research, v. 3, n. 1, p. 1-7, 2021. DOI: 10.36266/JPCR/130

    Abstract: The concentrations of trace elements were determined in coal, fly ashes from baghouse and cyclone filter, and bottom ash from the Figueira thermal power plant (FPP) by a neutron activation analysis technique. Study of the enrichment factor indicated that coal ashes were moderately enriched for all elements, except for Zn that exhibits significant to very-high enrichment. The mobilization of elements was observed in the zeolite products obtained from the three coal ashes. With regards to the amount present in each type of ash, most of the elements were present at same level in zeolites, with the exception of As which exhibited much lower concentration. The trace element concentrations of two soil samples collected in the vicinity of the FPP was also investigated. The results indicate that the FPP contributes mainly to the Zr and Ba pollution in nearby soils, particularly Zr pollution.

    Palavras-Chave: coal; elements; ashes; zeolites; combustion; enrichment

    Como referenciar este item
    Icon

  • IPEN-DOC 28290

    BOIANI, N.F. ; TOMINAGA, F.K. ; BORRELY, S.I. . Toxicity removal of pharmaceuticals mixtures through electron beam irradiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: aquatic ecosystems; contamination; drugs; electron beams; environmental impacts; pollutants; radiation dose units; toxicity; waste water

    Como referenciar este item
    Icon

  • IPEN-DOC 28564

    TOMINAGA, F. ; LEO, P.; BORRELY, S.I. . Toxicity assessment of acetylsalicylic acid using Saccharomyces cerevisiae. In: SOCIETY OF ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY (SETAC) LATIN AMERICA BIENNIAL MEETING, 14th, September 26-29, 2021, Online. Abstract... Pensacola, FL, USA: Society of Environmental Toxicology and Chemistry (SETAC), 2021. p. 50-50.

    Abstract: Urban and industrial growth has triggered the release of toxic compounds into the environment, causing negative impacts on the population and ecosystems. Among the pollutants, pharmaceuticals have drawn attention due to potential of impacting the environment at ecological relevant concentrations. Aspirin is widely used in human medicine as an analgesic, antipyretic and in actively preventing platelet aggregation, and it is frequently detected in influent samples at relatively high concentrations. The yeast Saccharomyces cerevisiae consists in simple eukaryotic model, widely used for toxicity assessment. The current study aims to evaluate the toxicity of the anti-inflammatory acetylsalicylic acid (aspirin) using viability and conductometric assays. The viability assays were based on the evaluation of the number of viable cells present in a cell suspension after 1 hour exposure, while the conductometric tests were done by monitoring of changes in the specific conductivity of suspensions of S. cerevisiae due to inhibition of fermentation in toxic conditions after 30 minutes of exposure. The viability tests showed no reduction of viability at the evaluated concentrations (up to 100 mg L-1). The conductometric assays demonstrated low sensibility of the yeast to aspirin with EC5030min of 815 mg L-1. The results also indicated that there was no increase in the sensitivity of conductometric assays even at 6 hours of exposure. Furthermore, the acute toxicity data was compared with data obtained from in silico toxicity models (ECOSAR). Toxicity data collated from the software from different trophic levels showed EC5096h, LC5048h and LC96h of 867, 1774 and 777 mg L-1 for green algae, daphnid and fish, respectively, indicating low toxicity of aspirin.

    Como referenciar este item
    Icon

  • IPEN-DOC 27859

    MELO, C.G. ; ROSA, J.M. ; GARCIA, V.S.G. ; BORRELY, S.I. ; PEREIRA, M.C.C. . Toxicity and color reduction of reactive dyestuff RB 21 and surfactant submitted to electron beam irradiation. Brazilian Journal of Radiation Sciences, v. 9, n. 1A, p. 1-14, 2021. DOI: 10.15392/bjrs.v9i1A.1311

    Abstract: There is an unwelcome reaction between the coloring and the water during the dyeing procedure, a portion of the coloring agent is lost in the bathing and it will compose the final whole effluent. The high absorbance index is related to lost dyestuffs and they also contribute with the toxic effects to the aquatic biota. In addition, these effluents contain large quantity of surfactants applied during dyeing baths, which also contribute to the high toxicity in these samples. The objective of this study was to evaluate electron beam irradiation technology, applied in samples of the Color Index Reactive Blue 21 (RB 21) dyestuff and in samples of surfactant non-ionic and in order to reduce toxicity for both and for RB 21, color reduction. Among the objectives of the study there are the dyestuff exhaustion degree, and some physical-chemical parameters. The acute toxicity assays were carried with Daphnia similis microcrustacean and the results of the dyestuff solution were: the irradiated samples with concentration 0.61 g L-1 did not present significant results, the EC 50 (%) value was to 58.26 for irradiated sample with 2.5 kGy and EC 50 (%) 63.59 for sample irradiated with 5 kGy. The surfactant was more toxic than RB 21, with EC 50 (%) value at 0.42. The color reduction reached 63.30% for the sample of the lowest concentration of effluent. There was a reduction of pH during irradiation.

    Palavras-Chave: color; dyes; electron beams; irradiation; liquid wastes; ph value; reduction; surfactants; toxicity; water

    Como referenciar este item
    Icon

  • IPEN-DOC 28289

    MELO, C.G. ; ROSA, J.R. ; BORRELY, S.I. ; PEREIRA, M.C.C. . Toxicity and absorciometric decay of textile dyeing effluent with reactive dyestuff RB21 submitted to electron beam irradiation. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, November 29 - December 2, 2021, Online. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2021.

    Palavras-Chave: chemical effluents; ecology; electron beams; environmental impacts; irradiation; liquid wastes; textile industry; toxicity; water

    Como referenciar este item
    Icon

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.

Exemplo:

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

Autor: Maprelian

Título: loss of coolant

Tipo de publicação: Texto completo de evento

Ano de publicação: 2015

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

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

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

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

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

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

ATENÇÃO!

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

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

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

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


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

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

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

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

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