MARCOS LEANDRO GARCIA ANDRADE
7 resultados
Resultados de Busca
Agora exibindo 1 - 7 de 7
Artigo IPEN-doc 25827 Study of the fish fossil Notelops brama from Araripe-Basin Brazil by Neutron Tomography2019 - PUGLIESI, REYNALDO; PEREIRA, MARCO A.S.; ANDRADE, MARCOS L.G.; BASSO, JULIANA M.L.; VOLTANI, CIBELE G.; GONZALES, IVONE C.In the last decade, Neutron Tomography significantly gained importance as an analyzing tool to inspect samples of paleontological interest. In general, neutrons are able to provide new and complementary information when compared to the ones provided by X-rays imaging methods. Specifically, in the present paper, the Neutron Tomography equipment of the IPEN-CNEN/SP was successfully applied to investigate the internal structure of a fish fossil, embedded in a calcareous concretion. The resulting images, which will be presented, has revealed different contrast between several regions within the specimen enabling the differencing of osteological structures of the fossil, information about its state of conservation, degree of embedding, inclusions as well as regions within the concretion which could be related to humidity or to other substances and minerals containing hydrogen naturally added to the fossil. The technique is non-destructive and non-invasive allowing a close analysis of the specimen. Furthermore, the obtained images have demonstrated the feasibility of the equipment at IPENCNEN/ SP for investigating this kind of sample.Artigo IPEN-doc 23097 Penetração e distribuição do consolidante Paraloid® B-72 em cerâmica branca estudada por tomografia com nêutrons2017 - PEREIRA, MARCO A.S.; PUGLIESI, REYNALDO; ANDRADE, MARCOS L.G.; PRUDENCIO, MARIA I.ASSESSMENT OF PARALOID® B-72 PENETRATION IN WHITE CERAMIC STUDIED BY NEUTRON TOMOGRAPHY. The neutron tomography technique was employed to study the penetration and distribution of the consolidant Paraloid® B-72 in ceramic. This study was carried out in white contemporary ceramic vessels which were maintained in two distinct and controlled air humidity conditions, 35% and 90%, before the consolidant application (brushing technique). The results showed that the treatment with Paraloid® B-72 is more effective when applied in the drier vessel. The depth of penetration for the vessel at 35%, reaches (3.3 ± 0.1) mm in the wall, while for the one at 90%, (1.9 ± 0.1) mm, and the maximal concentration impregnation was 26% higher. The 3D images allowed a visualization of the impregnation process, that is, its distribution, failures, homogeneity, boundary between materials. These results demonstrated the feasibility of the neutron tomography technique and of the equipment of IPEN-CNEN/SP, in support the expert work in the field of preservation and restoration of ceramic objects.Artigo IPEN-doc 21332 Study of pixel damages in CCD cameras irradiated at the neutron tomography facility of IPEN-CNEN/SP2015 - PUGLIESI, R.; ANDRADE, M.L.G.; DIAS, M.S.; SIQUEIRA, P.T.D.; PEREIRA, M.A.S.Artigo IPEN-doc 20649 The new facility for neutron tomography of IPEN-CNEN/SP and its potential to investigate hydrogenous substances2014 - SCHOUERI, R.M.; DOMIENIKAN, C.; TOLEDO, F. de; ANDRADE, M.L.G.; STANOJEV PEREIRA, M.A.; PUGLIESI, R.Artigo IPEN-doc 19222 The neutron tomography facility of IPEN-CNEN/SP and its potential to investigate ceramic objects from the Brazilian cultural heritage2013 - STANOJEV PEREIRA, M.A.; SCHOUERI, R.; DOMIENIKAN, C.; TOLEDO, F. de; ANDRADE, M.L.G.; PUGLIESI, R.Artigo IPEN-doc 09763 Real-time neutron radiography at the IEA-R1m nuclear research reactor2003 - MENEZES, M.O.; PUGLIESI, R.; PEREIRA, M.A.S.; ANDRADE, M.L.G.Artigo IPEN-doc 10590 Neutron-induced electron radiography2005 - PUGLIESI, R.; ANDRADE, M.L.G.; PEREIRA, M.A.S.; PUGLIESI, F.