Navegação por Autores IPEN "BUSTILLOS, JOSE O.V."

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  • IPEN-DOC 24062

    MESQUITA, KATIA A. ; AMARAL, PRISCILA O. ; BUSTILLOS, JOSE O.V. . Analysis of persistent organic pollutants (POPs) in sediments by GC/ECD generated by nuclide 63Ni. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Persistent Organic Pollutants (POPs) are toxic organic compounds resistant to environmental degradation. Besides, POPs bioaccumulate with potential significant impacts on human health and the environment. The Global Monitoring Plan (GMP) under the Stockholm Convention on POPs is a program that enables collection of comparable monitoring data from all regions of the world to assess the effectiveness in minimizing human and environmental exposure to POPs. The scope of this work is to develop and validate a method for the extraction and determination of POPs in sediments collected at Billings dam locate in São Paulo Metropolitan City. The compounds studied in this work are: Aldrin (C12H8Cl6), DDD (C14H10Cl4), DDE (C14H8Cll4), DDT (C14H9Cl5), Dieldrin (C12H8Cl6O), Endrin (C12H8Cl6O) and Heptachlor (C10H5Cl7). This work use the QuEChERS extraction method (Quick, Easy, Cheap, Effective, Rugged, and Safe) for sediment samples and the analysis of the compounds were carried out by gas chromatography with the electron capture detector (GC/ECD). The ECD detector ionizes the analytes by the beta particles from the nuclide sources 63Ni within carrier gas N2. The electrons produced in this process are collected, create an amplified current, and generating the chromatographic peak. The recovery of this method obtained values between 57% and 65% and the Relative Standard Deviation (RSD) values are between 1 and 4%. Details of the analytical method beside quantitative analyses data are presented in this work.

    Palavras-Chave: dams; dieldrin; electron capture; extraction; gas chromatography; nickel 63; organic compounds; pollutants; quantitative chemical analysis; sediments

  • IPEN-DOC 24113

    OLIVEIRA, GLAUCIA A.C. de ; BUSTILLOS, JOSE O.V. ; FERREIRA, JOAO C. ; BERGAMASCHI, VANDERLEI S. ; MORAES, RAFAELI M. de ; GIMENEZ, MAISE P. ; MIYAMOTO, FLAVIA K. ; SENEDA, JOSE A. . Applications of lithium in nuclear energy. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Lithium is a material of great interest in the world, it is found in different minerals on Earth's crust (spodumene, lepidolite, amblygonite and petalite) also in salt pans. This element belongs to alkaline group and has two natural isotopes: Li-6 and Li-7. In the nuclear field, lithium isotopes are used for different purposes. The Li-6 is applied in the production of energy, because its section of shock is larger than the other isotope. The Li-7 regulates the pH in refrigerant material in the primary circuits of the Pressurized Water Nuclear Reactor (PWR). In nuclear reactor, lithium is used as a heat transfer due its boiling temperature (1342°C), making it an excellent thermal conductor. However, to reach all these applications, lithium must have high purity (> 99%). The main processes to reach a high purity level of lithium employee a combination of solvent extraction and ion exchange process, to obtain its salts or ending with chemical electrolysis of its chlorides to obtain its pure metal. This work presents a review of new applications of Lithium in Nuclear Energy and its purification and enrichment processes.

    Palavras-Chave: brines; impurities; ion exchange; lithium 6; lithium 7; nuclear energy; solvent extraction

  • IPEN-DOC 24710

    BATALHA, SARAH; PARK, JEONG-HOO; ALVES, ELIANE; SANTANA, RAONI; SECO, ROGER; BUSTILLOS, JOSE O.V. ; SMITH, JAMES; GUENTHER, ALEX; TOTA, JULIO. Aspectos micrometeorológicos da emissão de monoterpenos em uma floresta na Amazônia central / Micrometeorological aspects of the monoterpenes emission in a forest at central Amazon. Ciência e Natura, v. 40, p. 150-154, 2018. DOI: 10.5902/2179460X30729

    Abstract: Este trabalho teve por objetivo apresentar resultados sobre a razão de mistura e fluxo de monoterpenos em uma região de floresta da Amazônia brasileira. Utilizou-se instrumentação da micrometeorologia (com o uso de um Anemômetro Sônico) e da química analítica através de um espectrômetro de massa com próton transferência (Proton Transfer Reaction – Time of Flight – Mass Spectrometer, PTR-ToF-MS). A calibração do espectrômetro foi realizada regularmente com a utilização de uma mistura gravimétrica de gás padrão contendo diferentes massas de compostos orgânicos voláteis. Os resultados evidenciaram razão de mistura média de monoterpenos de 0,185 ppbv e fluxo de emissão máxima de 1,495 mg m-2 h-1. Concluiu-se que esta região apresentou significativa emissão de monoterpenos em relação a outra floresta tropical na Amazônia central, evidenciando a necessidade de ampliar estudos sobre a química atmosférica em diferentes florestas da bacia amazônica.

    Palavras-Chave: meteorology; hydrocarbons; eddy current testing; organic compounds; evaporation

  • IPEN-DOC 24276

    BATALHA, SARAH; PARK, JEONG-HOO; ALVES, ELIANE; SANTANA, RAONI; SECO, ROGER; KIM, SAEWUNG; SOUZA, RODRIGO; BUSTILLOS, JOSE O.V. ; SMITH, JAMES; GUENTHER, ALEX; TOTA, JULIO. Aspectos micrometeorológicos da emissão de monoterpenos em uma floresta na amazônia central. In: WORKSHOP BRASILEIRO DE MICROMETEOROLOGIA, 10., 8-10 de novembro, 2015, Santa Maria, RS. Anais... 2015. p. 1-6.

    Abstract: Este trabalho teve por objetivo apresentar resultados sobre a razão de mistura e fluxo de monoterpenos em uma região de floresta da Amazônia brasileira. Utilizou-se instrumentação da micrometeorologia (com o uso de um Anemômetro Sônico) e da química analítica através do uso de um espectrômetro de massa com próton transferência (Proton Transfer Reaction – Time of Flight – Mass Spectrometer, PTR-TOF-MS). A calibração do espectrômetro foi realizada regularmente com a utilização de uma mistura gravimétrica de gás padrão contendo diferentes massas de compostos orgânicos voláteis. Os resultados evidenciaram razão de mistura média de monoterpenos de 0,185 ppbv e fluxo de emissão máxima de 1,495 mg m-2 h-1. Concluiu-se que esta região apresentou significativa emissão de monoterpenos em relação a outra floresta tropical na Amazônia central, evidenciando a necessidade de ampliar estudos sobre a química atmosférica em diferentes florestas da bacia amazônica.

  • IPEN-DOC 26607

    ANDRADE, MARIANA N. de ; BUSTILLOS, JOSE O.V. . Caracterização química dos compostos orgânicos voláteis biogênicos via GC/MS. In: PROGRAMA INSTITUCIONAL DE BOLSAS DE INICIACAO CIENTIFICA E TECNOLOGICA; SEMINARIO ANUAL PIBIC, 25.; SEMINARIO ANUAL PROBIC, 16.; SEMINARIO ANUAL PIBITI, 9, 6-7 de novembro, 2019, São Paulo, SP. Resumo expandido... São Paulo: IPEN-CNEN/SP, 2019. p. 130-131.

    Palavras-Chave: organic compounds; ecosystems; environment; chemical composition; carbon; emission

  • IPEN-DOC 19289

    MOURA, SERGIO C. ; COELHO, FELIPE P.; BUSTILLOS, JOSE O.V. . Characterization of carbon, sulfur and volatile compounds in nuclear fuel Usub(2)Sisub(2)-Al. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 11th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 18th; MEETING ON NUCLEAR INDUSTRY, 3rd, November 24-29, 2013, Recife, PE. Proceedings... São Paulo: ABEN, 2013, 2013.

    Palavras-Chave: carbon; sulfur; volatile matter; nuclear fuels; fuel plates; uranium silicides; aluminium; gravimetric analysis; quality control

  • IPEN-DOC 21218

    OLIVEIRA, REGIANI C.; PIRES NETO, RUY C.; BUSTILLOS, JOSE O.V. ; MACCHIONE, MARIANGELA; DOLHNIKOFF, MARISA; SALDIVA, PAULO H.N.; GARCIA, MARIA L.B.. Chemical composition modulates the adverse effects of particles on the mucociliary epithelium. Clinics, v. 70, n. 10, p. 706-713, 2015.

    Palavras-Chave: epithelium; total suspended particulates; chemical composition; particles; particulates; frogs; x-ray fluorescence analysis; gas chromatography; mass spectroscopy; respiratory system; comparative evaluations; multi-element analysis

  • IPEN-DOC 16536

    VASCONCELLOS, PEROLA C. ; SOUZA, DAVI Z.; SANCHEZ CCOYLLO, ODON; BUSTILLOS, JOSE O.V. ; LEE, HELENA; SANTOS, FERNANDO C.; NASCIMENTO, KATIA H.; ARAUJO, MARIA P.; SAARNIO, KARRI; TEINILA, KIMMO; HILLAMO, RISTO. Determination of anthropogenic and biogenic compounds on atmospheric aerosol collected in urban, biomass burning and forest areas in São Paulo, Brazil. Science of the Total Environment, v. 408, n. 23, p. 5836-5844, 2010.

    Palavras-Chave: brazil; urban areas; air pollution; biomass; burns; forests; atmospheres; aerosols; organic compounds; inorganic compounds; biological markers

  • IPEN-DOC 27247

    VARCA, JUSTINE P.R.O. ; MARTINS, ELAINE A.J. ; VARCA, GUSTAVO H.C. ; ROMANO, RENATO L.; LEBRE, DANIEL T.; LAINETTI, PAULO E.O. ; BUSTILLOS, JOSE O.V. . Determination of organochlorines in soil of a suburban area of São Paulo Brazil. International Journal of Environmental Research and Public Health, v. 17, n. 16, p. 1-16, 2020. DOI: 10.3390/ijerph17165666

    Abstract: Technological advances have promoted improvements in several science fields, especially related to environmental and analytical areas with the improvement of detection and development of environmentally friendly extraction techniques. This study applied Quick, Easy, Cheap, Effective, Rugged and Safe method (QuEChERS) for soil extraction and assessed its performance through a validation study using samples from the soil of a contaminated area in Caieiras, SP, Brazil. Nine organochlorine pesticides, including the isomers alpha, beta, gamma and delta- hexachlorocyclohexane; cis- and trans-heptachlor epoxide; cis- and trans-chlordane and heptachlor were analyzed by gas chromatography coupled to electron capture detector. The method was validated according to ISO 5725-4 (2020), EURACHEM (2014) and DOQ-CGCRE-008 (2016). The limits of detection and quantification of the method for the nine organochlorines were α-HCH (1.2 and 12.6 µg kg−1), β-HCH (1.7 and 12.0 µg kg−1), γ-HCH (1.5 and 11.6 µg kg−1), δ-HCH (0.8 and 11.6 µg kg−1), heptachlor (1.0 and 10.8 µg kg−1), cis-heptachlor epoxide (0.9 and 11.5 µg kg−1), trans-heptachlor epoxide (0.9 and 11.5 µg kg−1), cis-chlordane (0.4 and 7.9 µg kg−1) and trans-chlordane (0.5 and 10.9 µg kg−1), respectively, and all of them were within the maximum limits recommended by the EPA for the compounds α-HCH (86.0 and 360.0 µg kg−1), β-HCH (300.0 and 1.3 × 103 µg kg−1), γ-HCH (570.0 and 2.5 × 103 µg kg−1), δ-HCH (not defined), heptachlor (130.0 and 630.0 µg kg−1), cis-/trans-heptachlor epoxide (7.0 and 330.0 µg kg−1), cis-/trans-chlordane (1.77 × 103 and 7.7 × 103 µg kg−1) in residential and industrial soil, respectively. Recovery results were between 65% and 105% for almost all compounds, which is an optimum result for multi-residue analytical methods, considering the complexity of the matrix used in the study. Caieiras presented contamination levels of α-HCH in the range of 2.0 to 66.0 µg g−1, which was higher than the limits established by EPA, corresponding to 0.077 µg g−1 for residential soil and 0.27 µg g−1 for industrial soil. According to the validation study, the analytical method proposed was reliable for organochlorine quantification, and the QuEChERS was considered efficient for organochlorine extraction from soil.

    Palavras-Chave: organic chlorine compounds; soils; urban areas; pollution; sanitary landfills; land pollution; pesticides; environmental impacts; validation; electron-capture detectors

  • IPEN-DOC 10582

    SASSINE, A.; MOURA, S.C. ; ALMEIDA, L.P.S.; DOMINGOS, M.L.S.; MARTINS JUNIOR, H.A.; SILVA, C.; BUSTILLOS, JOSE O.V. . Determincao de carbono em amostras de siliceto de uranio para reatores nucleares. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; ENCONTRO NACIONAL DE FISICA E REATORES THERMAL HIDRAULICA, 14th, ago. 28 - set. 2, 2005, Santos, SP. Anais... Sao Paulo: ABEN, 2005, 2005.

    Palavras-Chave: aluminium; calibration standards; carbon additions; carbon dioxide; dispersion nuclear fuels; experimental data; fuel plates; iear-1 reactor; reactor cores; uranium silicides

  • IPEN-DOC 16830

    AMARAL, PRISCILA O.; OLIVEIRA, JUSTINE P.R.; BUSTILLOS, JOSE O.V. . Diferentes técnicas de varredura de íons no espectrômetro de massas aplicadas à análise de organoclorados via GC/MS. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 10th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 17th; MEETING ON NUCLEAR INDUSTRY, 2nd, October 24-28, 2011, Belo Horizonte, MG. Proceedings... Sao Paulo: ABEN, 2011, 2011.

    Palavras-Chave: gas chromatography; mass spectroscopy; chemical composition; organic compounds; sample preparation; spectrometers

  • IPEN-DOC 22500

    BATALHA, SARAH; ALVES, ELIANE; PARK, JEONG HOO; SECO, ROGER; TOTA, JULIO; SANTANA, RAONI; GUENTHER, ALEX; KIM, SAEWUNG; SMITH, JAMES; GOMES, ANA C.; SOUZA, RODRIGO; BUSTILLOS, JOSE O.V. . Fluxo de isopreno acima do dossel de uma floresta primária na região do Tapajós, Amazônia, Brasil / Fluxes of isoprene above canopy of a primary forest in the Tapajos region, Amazon, Brazil. In: WORKSHOP BRASILEIRO DE MICROMETEOROLOGIA, 9., 11-13 de novembro, 2015, Santa Maria, RS. Anais... 2015.

    Palavras-Chave: brazil; isoprene; amazon river; forests; volatile matter; organic compounds; mass spectrometers

  • IPEN-DOC 24064

    MANHANI, KELLY C. ; AMARAL, PRISCILA O. ; BUSTILLOS, JOSE O.V. ; MENDES, CRISTIANA de A.; LACERDA, JOAO P.A. de; SILVA, JORGE L. da. Halogenated pesticide analysis in orange juice by gas chromatography with electron capture detector (GC-ECD) with 63Ni nuclide. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017.

    Abstract: Brazil has been gain space in the market of orange juice in the last years. For the exportation of this product to keep growing, its quality of this product must be ensured by puting in force more strictive legislations and custom barriers, in order to improve the well-being and health of the population. In this work were analyzed four orange juices brands produced in the State of São Paulo. It was quantified the acaricide known as Dicofol (2,2,2-trichloro-1,1-bis(4-chlorophenyl) ethanol) widely used to combat the Citrusleprosis virus, transmitted by mites to the citrus culture. This pesticide was chosen due to its importance in the production of orange in large scale and their indiscriminate use may pose risks to humans and of environment. The analytical technique applied was gas chromatography coupled with electron capture detector (GC-ECD) using the 63Ni nuclide. This beta (β) radiation source ionizes the carrier gas (N2), generanting an electron current that forms the baseline. The analites pass through the detector and capture electrons, generating the analitycal signal that is proportional to the concentration of analite. The sample preparation was done by QuEChERS. The limits of detection (LOD) and quantification (LOQ) found were 0.005 and 0.025 mg kg-1 respectively. The applied methodology was efficient and presented excellent analytical sensitivity for the pesticide Dicofol, being that of four samples analyzed, only in one was found concentration of 0.03 mg kg-1, above the LOQ, however below the Maximum Residue Limit (MRL) for fruits (0.1 mg kg-1) established by Codex alimentarius.

    Palavras-Chave: beverages; concentration ratio; electron-capture detectors; gas chromatography; nickel 63; pesticides; sample preparation

  • IPEN-DOC 23711

    GU, DASA; GUENTHER, ALEX B.; YU, HAOFEI; SHILLING, JOHN E.; LONGO, KARLA; YANG, QING; HUANG, MAOYI; ZHAO, CHUN; MARTIN, SCOT T.; ARTAXO, PAULO; KIM, SAEWUNG; SECO, ROGER; STAVRAKOU, TRISSEVGENI; TOTA, JULIO; SOUZA, RODRIGO A.F. de; BUSTILLOS, JOSE O.V. ; ALVES, ELIANE G.; LIU, YING; SHRIVASTAVA, MANISHKUMAR B.; LENG, GUOYONG; HU, ZHIYUAN; SANTOS, FERNANDO C. dos. Improved tropical forest biogenic VOC emission factors based on GoAmazon2014/5 airborne observations. In: AMERICAN GEOPHYSICAL UNION FALL MEETING, December 14-18, 2015, San Francisco. Abstract... 2015.

    Abstract: Biogenic volatile organic compounds (BVOCs) emitted from terrestrial ecosystems play an important role in atmospheric chemistry and global climate feedbacks. The immense biological and chemical diversity of BVOC is a challenge for the numerical modeling of BVOC emissions, especially for tropical forests. The fast response airborne PTR-MS measurements of BVOC mixing ratios during the GoAmazon2014/5 campaign provide an opportunity to estimate BVOC emissions from tropical forest landscapes using eddy covariance and mixed layer variance techniques. The average isoprene emissions based on airborne measurements are 6.16±4.62 mg m h during wet season and 12.89±8.93 mg m h during dry season. These observations are compared with the spatial and temporal distributions of BVOC emissions estimated using the Model of Emissions of Gases and Aerosols from Nature (MEGAN) within the framework of the Community Land Model (CLM). By comparing the emissions estimated from airborne observations with that from MEGAN simulations, the predictive capability for diverse tropical land cover types are evaluated and an approach for improving model estimates is outlined. Satellite observations are also applied to investigate the environmental driving variables for BVOC emissions. OH concentrations are calculated from the observed BVOC mixing ratios by using the mixed layer mass balance technique and by the gradient in measured eddy covariance fluxes. The calculated values are in general agreement with OH CIMS observations at the T3 ground site near Manacaparu.

  • IPEN-DOC 17199

    OLIVEIRA, JUSTINE P.R. de; ROMANO, RENATO L.; LEBRE, DANIEL T.; BUSTILLOS, JOSE O.V. . Ionic fragmentation of organochlorine compounds by electron impact ion source of mass spectrometer. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 10th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 17th; MEETING ON NUCLEAR INDUSTRY, 2nd, October 24-28, 2011, Belo Horizonte, MG. Proceedings... Sao Paulo: ABEN, 2011, 2011.

    Palavras-Chave: organic chlorine compounds; ionization; fragmentation; ion-molecule collisions; electric fields; mass spectrometers

  • IPEN-DOC 25806

    PARALOVO, SARAH L.; BARBOSA, CYBELLI G.G.; CARNEIRO, ISABELA P.S.; KURZLOP, PRISCILA; BORILLO, GUILHERME C.; SCHIOCHET, MARIA F.C.; GODOI, ANA F.L.; YAMAMOTO, CARLOS I.; SOUZA, RODRIGO A.F. de; ANDREOLI, RITA V.; RIBEIRO, IGOR O.; MANZI, ANTONIO O.; KOURTCHEV, IVAN; BUSTILLOS, JOSE O.V. ; MARTIN, SCOT T.; GODOI, RICARDO H.M.. Observations of particulatematter, NO2, SO2, O3, H2S and selected VOCs at a semi-urban environment in the Amazon region. Science of the Total Environment, v. 650, p. 996-1006, 2019. DOI: 10.1016/j.scitotenv.2018.09.073

    Abstract: This research aims to assess air quality in a transitional location between city and forest in the Amazon region. Located downwind of the Manaus metropolitan region, this study is part of the large-scale experiment GoAmazon2014/5. Based on their pollutant potential, inhalable particulate matter (PM2.5), nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), hydrogen sulfide (H2S), benzene, toluene, ethylbenzene and meta-, orto-, para-xylene (BTEX) were selected for analysis. Sampling took place during the wet season (March–April 2014) and dry season (August–October 2014). The number of forest fires in the surroundings was higher during the dry wet season. Results show significant increase during the dry season in mass concentration (wet: b0.01–10 μg m−3 ; dry: 9.8–69 μg m−3 ), NH4 + soluble content (wet: 13–125 μg m−3 ; dry: 86–323 μg m−3 ) and K+ soluble content (wet: 11–168 μg m−3 ; dry 60–356 μg m−3 ) of the PM2.5, and O3 levels (wet: 1.4–14 μg m−3 ; dry: 1.0–40 μg m−3 ), indicating influence of biomass burning emissions. BTEX concentrations were lowin both periods, but also increased during the dry season. Aweak correlation in the time series of the organic and inorganic gaseous pollutants indicates a combination of different sources in both seasons and NO2 results suggest a spatial heterogeneity in gaseous pollutants levels beyond initial expectations.

    Palavras-Chave: air quality; brazil; amazon river; forests; urban areas; biomass; statistical data; particulates; air pollution monitoring; environmental effects

  • IPEN-DOC 23712

    KIM, SAEWUNG; SECO, ROGER; PARK, JEONG-HOO; SJOSTEDT, STEVEN J.; GUENTHER, ALEX B.; SMITH, JAMES N.; LIU, YINGJUN; BUSTILLOS, JOSE O.V. ; SOUZA, RODRIGO A.F. de; TOTA, JULIO; MARTIN, SCOT T.. OH observations in a tropical rain forest environment using a chemical ionization mass spectrometry technique during GOAmazon intensive campaigns. In: AMERICAN GEOPHYSICAL UNION FALL MEETING, December 14-18, 2015, San Francisco. Abstract... 2015.

    Abstract: We will present observed OH in the Amazon rain forest using a chemical ionization mass spectrometer (CIMS). The observation was conducted at the T3 site in Manacapuru, Amazonas Brazil. It had been accepted almost as an axiom that very low OH is expected in low NO environments such as a pristine rain forest. However, recent studies in the pristine rain forest environments consistently reported significantly higher than expected OH levels. This sparked extensive and intensive studies to explore any possibility of OH regeneration from isoprene photo-oxidation processes in the low NO condition. Four OH regeneration processes related with isoprene photochemistry have been proposed since 2008. However, the levels of the expected OH enhancement vary greatly among the proposed OH regeneration processes mediated by the isoprene oxidation processes. As all enhanced OH observations from the pristine areas with high isoprene conditions have used the laser induced fluorescence (LIF) technique, the possibilities of potential positive artifacts have also been explored. In this context, the first tropical forest CIMS OH dataset will be discussed in the context of 1) comparisons with previously reported OH using the LIF technique, 2) comparisons with box model calculated OH with different isoprene oxidation scenarios to reconcile measured and calculated OH, and 3) comparisons with regional model calculated OH. The CIMS observational dataset along with a comprehensive trace gas dataset provides a constraint to assess current uncertainty in oxidation capacity of the pristine forested region, which has tremendous implications towards global fates of short lived climate forcers.

  • IPEN-DOC 13145

    PORTO, PETERSON; BUSTILLOS, JOSE O.V. . Otimizacao da analise isotopica de UFsub(4) utilizando-se a tecnica de espectrometria de massas por quadrupolo. Quimica Nova, v. 31, n. 6, p. 1562-1566, 2008.

    Palavras-Chave: uranium hexafluoride; isotope ratio; mass spectroscopy; quadrupoles

  • IPEN-DOC 26319

    ANDRADE, MARIANA N. ; OLIVEIRA, GLAUCIA A.C. ; PIRANI, DEBORA A. ; COUTINHO, JOAO F. ; BERGAMASCHI, VANDERLEI S. ; SENEDA, JOSE A. ; BUSTILLOS, JOSE O.V. . Purification of lithium carbonate by ion-exchange processes for application in nuclear reactors. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 3153-3157.

    Abstract: Lithium Compounds have applications in strategic areas for intern consumption of a country as well as international commerce. In nuclear industry, the lithium is used for the cooling of PWR reactors as a pH stabilizer. Based on this assumption, the generation of knowledge to master the processing cycle of these compounds is essential. The high degree of purity of lithium compounds is determinant to have success in these applications. Lithium hydroxide LiOH and lithium carbonate Li2CO3 are the main forms in which lithium is used industrially. To improve the quality of the starting product, purifying process were used until obtaining an adequate purity level of raw material (> 99%). The present work aims to make feasible a purification of Li2CO3 through ion-exchange chromatography from a 98.5% purity compound. The impurities present in higher content are sodium and calcium. To separate these two elements from lithium or at least to lower their concentrations, a column with cationic resin was used to fix lithium. The determination of lithium, sodium and calcium contents in the solutions was performed by inductively coupled plasma optical emission spectrometry, ICP-OES. The experiments performed to evaluate the best lithium purification condition were based on the variation of the main operational parameters: pH, flow and elution solution. The results indicate increased purity from the application of ion exchange operations obtaining a suitable condition for nuclear uses.

    Palavras-Chave: aqueous solutions; calcium; impurities; ion exchange chromatography; lithium carbonates; purification; sodium

  • IPEN-DOC 29561

    LEBRE, DANIEL T. ; THIPE, VELAPHI C. ; COTRIM, MARYCEL E.B. ; BUSTILLOS, JOSE O.V. . Sugarcane beyond the sweetness: one application in green chemistry. In: SIMIONATO, ANA V.C. (Coord.) IBEROAMERICAN CONFERENCE ON MASS SPECTROMETRY, 3rd, December 10-15, 2022, Rio de Janeiro, RJ. Abstract... Campinas, SP: Sociedade Brasileira de Espectrometria de Massas - BrMASS, 2022. p. 72-73.

    Abstract: Introduction: Sugarcane is a well known source or raw material to produce sugar, alcohol and bioethanol. Brazil is the world’s largest producer of sugarcane (Saccharum sp.), followed by India, China, and Bangladesh, all of which generate significant amounts of bagasse as a by-product of their sugar and bioethanol mills in each of these countries.1 The sugarcane bagasse (SCB) is a fibrous material remaining after the plant's stalk pressing process used to extract the sweet juice used for the industrial production of sugar and alcohol. SCB is one of the most economically viable and readily accessible agro-industrial residues in the world, particularly in tropical regions.2 Recently SCB has taken attention in scientific community, manly in chemistry, because exhibits strong biosorption capabilities, which are defined as the passive sorption of organic and inorganic substances in soluble or insoluble forms from an aqueous solution utilizing decomposing biological materials. Sarker at al. published a comprehensive study of the SCB biosorption properties and their application.3 The purpose of this work is to demonstrate the continued applicability of SCB as SPE biosorbent bed for extracting synthetic hormones (ethynylestradiol, drospirenone and levonogestrel) from pharmaceutical industrial effluent prior LC-MS/MS quantitative analysis. Methods: SPE: SCB 75 μm bed at a concentration of 50 mg was used to pack empty 1 cc (mL) SPE cartridges containing retained frits. To compare the outcomes of the recoveries, the following commercial (cSPE) were used: Oasis HLB 30 mg, 1 mL; Discovery DSC-18 50 mg, 1mL and Sulpeclean Envi-Carb, 100 mg, 1 mL. Conditioning: 1 mL of methanol and 1 mL of water; Load: 1 mL of sample; Wash: 2x 0.75 mL of water; Dry cartridge: under synthetic air flow; Elution: 2x 0.3 mL MeOH. Prior to LC-APCI-MS/MS analysis, the MeOH extracted sample residue was dried in 10 mL class assay tube under N2 gas flow at 40 ºC using and dissolved in 1 mL of 50% acetonitrile/50% water (v/v) solution. Results: The sorption effectiveness of the SCB bed was evaluated using the following experimental parameters in comparison to existing and commercially available SPE (cSPE) cartridges: (i) SCB re-use (recycling); (ii) load concentration variation; (iii) breakthrough (mass/volume capacity); (iv) pH variation; (v) extraction solvents variation (vi) particle size; and (vii) suitability for use in industrial effluent. The SCB SPE results (accuracy data ranged from 99% to 120%) were significantly acceptable for all the synthetic hormones compounds tested and analyzed in industrial effluent samples and comparable to Oasis HLB (benzene copolymer) SPE material and the others. Conclusion: Our overarching objective for developing SCB as SPE sorbent material for the analysis of synthetic hormones from industrial effluents has expanded the research area and/or application of SCB, which the biomass is often burnt to generate energy in the sugar and alcohol mills.

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.