REGINA BECK TICIANELLI
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Artigo IPEN-doc 26162 Radionuclide analysis of the IEA-R1 pool water2019 - TICIANELLI, REGINA B.; ZAHN, GUILHERME S.; SILVA, PAULO S.C. da; GENEZINI, FREDERICO A.IEA-R1 is a 5MW pool-type research reactor built in the late 1950's. In the last years, it operates at 4.5MW for 8h on Mondays, Tuesdays and Wednesdays. In every day of operation, a sample is taken from the pool water both before starting the reactor and at the end of the day and analyzed in an HPGe detector, in order to verify for possible problems with the fuel elements or other issues. In this work, the results obtained in these analyses spanning for some months are discussed regarding the radionuclides frequently identi ed and the dependence of their activities with time.Artigo IPEN-doc 24116 Determinação de impurezas inorgânicas em henna para sobrancelhas para aplicação cosmética2017 - MARINHEIRO, THAMIRES S.; LANGE, CAMILA N.; FIGUEIREDO, ANA M.G.; TICIANELLI, REGINA B.; JESUS, TATIANE A. deAlguns cosméticos podem conter impurezas inorgânicas que, dependendo do nível de fração em massa das mesmas na composição do produto, podem causar efeitos nocivos à saúde humana. A henna (Lawsonia inermis) é uma planta, e o pó, obtido de suas folhas secas e maceradas, é comercializado para coloração de cabelos e sobrancelhas. É comum o uso de henna como alternativa às colorações sintéticas, especialmente para os consumidores que preferem produtos cosméticos naturais ou orgânicos, pois estes são tidos como seguros. Entretanto, algumas hennas comerciais são dopadas com materiais que intensificam a cor e diminuem o tempo de aplicação do produto, estes podem ser de origem mineral ou sais iônicos. Estudos do conteúdo de elementos inorgânicos em hennas comercializadas no Brasil são escassos, apesar de o Brasil ser um dos maiores mercados consumidores de cosméticos do mundo e a aplicação de hennas em sobrancelhas ter aumentado nos últimos anos. O objetivo deste estudo foi avaliar a fração em massa de Ba, Cd, Co, Cr, Fe, Ni e Zn em hennas para coloração de sobrancelhas. Hennas de diferentes cores e marcas comercializadas no mercado e aplicadas em salões de cabelereiro foram analisadas. Quatro das 11 amostras analisadas apresentaram valores de fração em massa de bário cerca de 250 vezes maior que o valor preconizado pela agência nacional de vigilância sanitária (ANVISA), fato que pode representar um potencial risco aos usuários deste tipo de produto. As frações em massa de Cd, Co, Cr, Fe, Ni e Zn apresentaram valores abaixo dos limites regulamentados para cosméticos.Artigo IPEN-doc 24091 Determination of REEs in agricultural soils of pernambuco by the neutron activation technique2017 - FRANÇA, FERNANDA C.S.S.; TICIANELLI, REGINA B.; MOREIRA, EDSON G.; GENEZINI, FREDERICO A.; ALBUQUERQUE, ADRIANA M. de A.; SILVEIRA, PATRICIA B. da; BARBOSA, JONNAS T. de L.; ALMEIDA, AMANDA C. de; HONORATO, ELIANE V.; HAZIN, CLOVIS A.The indiscriminate use of phosphate fertilizers causes adverse effects on biota, mainly due to the contaminants present in the rocks used in their manufacture. Among these contaminants, stand out the Rare Earth Elements (REEs) because of the significant increase in the use in several technological areas, such as in vehicle catalysts and also in fertilizer enrichment. In order to evaluate the levels of La, Sm, Nd, Yb and Lu by the Instrumental Neutron Activation Analysis (INAA), the present study aims to survey the ETRs in agricultural soils in Pernambuco/Brazil. For this study, 120 soil samples with a depth of 20 cm were collected in the main vegetable producing regions of the Metropolitan Region of Recife (RMR), evaluating organic and conventional crops with and without influenced by automotive vehicles. The results obtained when compared to the Netherlands reference values defined by the National Institute of Health and Environment (RIVM). The results were higher in all points for La (35 mg.kg-¹ at 85 mg.kg-¹) Yb, (4 mg.kg-¹ at 11 mg.kg-¹) and Lu (0.3 mg.kg-¹ at 0.7 mg.kg-¹ at 4 mg.kg-¹). For Nd (9 mg.kg-¹ at 137 mg.kg-¹) the concentrations were above the values reported by RIVM in 4 points. Comparing the types of crops evaluated with the literature, the results are found was above for all elements analyzed. It may be related to the increase in the use of phosphate fertilizers. However, in environments using smaller amounts of additives, the results were also significant and the more detailed studies are needed to evaluate other possible contamination pathways.Artigo IPEN-doc 24074 Evaluation of the uncertainty associated with sample holders in NAA measurements in LAN/IPEN2017 - ZAHN, GUILHERME S.; TICIANELLI, REGINA B.; SAIKI, MITIKO; GENEZINI, FREDERICO A.In IPEN’s Neutron Activation Laboratory (LAN/IPEN), thin stainless steel sample holders are used for gamma spectrometry in NAA measurements. This material is very practical, but its chemical composition may be troublesome, as it presents large amounts of elements with intermediate atomic number, with attenuation factors for low-energy gamma-rays that must not be neglected. In this study, count rates obtained using different sample holders were compared. To accomplish that, an Am-241 source, with 59-keV gamma emission, was used so that low-energy gamma attenuation differences can be determined. Moreover, in order to study the energy dependence of these differences, a Ho-166m source was also used. From these results, it was possible to analyze the experimental error associated to the variations between sample holders, with the aim of introducing an addictive term to the uncertainty analysis of comparative Neutron Activation Analysis results.Artigo IPEN-doc 21161 Uncertainty analysis in comparative NAA applied to geological and biological matrices2015 - ZAHN, GUILHERME S.; TICIANELLI, REGINA B.; LANGE, CAMILA N.; FAVARO, DEBORAH I.T.; FIGUEIREDO, ANA M.G.Artigo IPEN-doc 13912 IPEN-CNEN/SP performance in the CCQM-P70 pilot study on trace elements in sewage sludge2007 - MOREIRA, EDSON G.; FIGUEIREDO, ANA M.G.; TICIANELLI, REGINA B.; VASCONCELLOS, MARINA B.A.Artigo IPEN-doc 10767 Participacao do laboratorio de analise por ativacao do IPEN no geopt - International proficiency test for analytical and geochemical laboratories2005 - TICIANELLI, R.B.; FIGUEIREDO, A.M.G.Artigo IPEN-doc 19415 U Th and lanthanides in streetsoils of São Paulo city, Brazil2013 - TICIANELLI, R.B.; RIBEIRO, A.P.; FIGUEIREDO, A.M.G.; ZAHN, G.S.Artigo IPEN-doc 19298 Utilização da bromélia Tillandsia usneoides L. no biomonitoramento da poluição atmosférica na região metropolitana de São Paulo - SP, Brasil2013 - ALBUQUERQUE, CAROLINE R.; FIGUEIREDO, ANA M.G.; SILVA, BARBARA C. da; TICIANELLI, REGINA B.; FIGUEIRA, RUBENS C.L.; NIEVOLA, CATARINA C.; ALVES, EDENISE S.; DOMINGOS, MARISA; RIBEIRO, ANDREZA P.Artigo IPEN-doc 19243 Development of a software for INAA analysis automation2013 - ZAHN, GUILHERME S.; GENEZINI, FREDERICO A.; FIGUEIREDO, ANA M.G.; TICIANELLI, REGINA B.