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Navegação Periódicos - Artigos por ano de publicação "2023"
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SILVA, RICARDO M. e; SOUZA, FERNANDA de L.; DIAS, EDUARDO; SILVA, GELSON T. dos S.T. da; DURAN, FLORYMAR E.; REGO, ARJUN; HIGGINS, DREW; RIBEIRO, CAUE.
The role of TiO2:SnO2 heterojunction for partial oxidation of methane by photoelectrocatalytic process at room temperature.
Journal of Alloys and Compounds,
v. 968,
p. 1-7,
2023.
DOI:
10.1016/j.jallcom.2023.172090
Abstract:
Partial Oxidation of Methane into hydrocarbons using photoelectrochemical routes is attractive from a sustainability point of view owing to the possibility of using renewable energy (i.e., solar illumination) to activate
this stable molecule. However, the process demands the development of novel catalysts that can promote
methane activation and oxidation in a controlled manner to increase energy conversion efficiency. Herein, we
demonstrated that semiconductor heterostructures improved charge separation compared to the individual
materials alone. A more effortless transfer between bands favors the separation of the electron-hole (e− /h+) pairs
generated by the photoelectrocatalytic system and prevents them from recombining. This process produces
reactive oxygens, essential to driving methane oxidation conversion of the C–H bond cleavage. TiO2:SnO2
semiconductor heterojunction catalysts in film shape were investigated for methane oxidation via a photoelectrocatalytic process. The methane oxidation reactions were carried out in an inflow and sealed electrochemical system for 1 h. Liquid-state nuclear magnetic resonance revealed methanol and acetic acid as the main
liquid products, where the TiO2:SnO2 heterojunction exhibited better performance with values of 30 and 8 µmol.
cm− 2
.h− 1
, respectively. Compared to their materials alone, the superior performance of the TiO2:SnO2 heterojunction is attributed to the formation of heterostructure type II that enables a more effortless transfer between
bands, facilitating the separation of the generated e− /h+ pairs under UV-Vis irradiation. The outcomes achieved
here will motivate further studies for developing semiconductor heterojunction structure catalysts in photoelectrocatalysis to partially oxidize methane into valuable chemicals.
SILVA, RICARDO M. e; SOUZA, FERNANDA de L.; DIAS, EDUARDO; SILVA, GELSON T. dos S.T. da; DURAN, FLORYMAR E.; REGO, ARJUN; HIGGINS, DREW; RIBEIRO, CAUE.
The role of TiO2:SnO2 heterojunction for partial oxidation of methane by photoelectrocatalytic process at room temperature.
Journal of Alloys and Compounds,
v. 968,
p. 1-7,
2023.
DOI:
10.1016/j.jallcom.2023.172090.
Disponível em: http://repositorio.ipen.br/handle/123456789/34246. Acesso em: $DATA.
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CARBONE, D.; AGODI, C.; BELLONE, J.I.; BURRELLO, S.; CALABRESE, S.; CAPPUZZELLO, F.; CAVALLARO, M.; COLONNA, M.; DE GREGORIO, G.; FERREIRA, J.L.; GARGANO, A.; LENSKE, H.; SGOUROS, O.; SPATAFORA, A.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BRISCHETTO, G.A.; CALVO, D.; CAPIROSSI, V.; CHÀVEZ LOMELÌ, E.R.; CIRALDO, I.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LAY, J.A.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
The NUMEN project: probing nuclear response to weak interaction by nuclear reactions.
Journal of Physics: Conference Series,
v. 2586,
p. 1-4,
2023.
DOI:
10.1088/1742-6596/2586/1/012133
Abstract:
Different reactions channels induced by the 18O + 40Ca collisions at 275 MeV incident energy are simultaneously measured and analysed consistently within the same reaction and structure frameworks within the NUMEN project. The project aims to provide data-driven information for the determination of the nuclear matrix elements involved in the neutrinoless double beta decay. In particular, the elastic and inelastic scattering, one- and two-proton transfer, one-neutron transfer, and single charge exchange reactions are explored. The full quantum-mechanical calculations, performed by including microscopic nuclear structure inputs, describe well all the experimental data, giving support to a multi-channel strategy for the analysis of heavy-ion induced direct reactions.
CARBONE, D.; AGODI, C.; BELLONE, J.I.; BURRELLO, S.; CALABRESE, S.; CAPPUZZELLO, F.; CAVALLARO, M.; COLONNA, M.; DE GREGORIO, G.; FERREIRA, J.L.; GARGANO, A.; LENSKE, H.; SGOUROS, O.; SPATAFORA, A.; ACOSTA, L.; AMADOR-VALENZUELA, P.; BRISCHETTO, G.A.; CALVO, D.; CAPIROSSI, V.; CHÀVEZ LOMELÌ, E.R.; CIRALDO, I.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; GUAZZELLI, M.A.; HACISALIHOGLU, A.; IAZZI, F.; LAY, J.A.; LINARES, R.; LUBIAN, J.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
The NUMEN project: probing nuclear response to weak interaction by nuclear reactions.
Journal of Physics: Conference Series,
v. 2586,
p. 1-4,
2023.
DOI:
10.1088/1742-6596/2586/1/012133.
Disponível em: http://repositorio.ipen.br/handle/123456789/34335. Acesso em: $DATA.
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PAOLINI, TIAGO B.; ASSUNCAO, ISRAEL P.; COSTA, ISRAEL F.; BLOIS, LUCCA; FELINTO, MARIA C.F.C
; MOURA JUNIOR, RONALDO T.; TEOTONIO, ERCULES E.S.; MALTA, OSCAR L.; CARNEIRO NETO, ALBANO N.; BRITO, HERMI F..
The influence of imidazolium counterions on the luminescence properties of Cnmim[Eu(tta)4] tetrakis complexes in solid-state and ionic liquid solutions.
Journal of Luminescence,
v. 263,
p. 1-11,
2023.
DOI:
10.1016/j.jlumin.2023.120158
Abstract:
A series of lanthanide tetrakis complexes Cnmim[Ln(tta)4] where Ln3+: Eu3+ and Gd3+, Cnmim: imidazoliumbased counterions (n from 3 to 8) and tta: thenoyltrifluoroacetonate were synthesized by a one-pot method.
The Cnmim[Ln(tta)4] complexes are thermostable up to 210 ◦C and present an isomorphic-like character for the
complexes with n = 5, 6, and 7. The phosphorescence spectral profile of the Cnmim[Gd(tta)4] complexes showed
intense emission broadbands, in which the barycenters are slightly shifted to energies from the 18,950 to 18,450
cm− 1 range. The Cnmim[Eu(tta)4] complexes in solutions of the corresponding [Cnmim]Br ionic liquids show
similar emission spectral profiles as their corresponding in the solid state, indicating that the coordination
polyhedron does not undergo a significant variation when the chemical environment is changed. Relatively high
values of the intensity parameter Ω2 in both media are presented. The Ω4 values of the complexes in solutions of
ionic liquids are also similar, reinforcing that there are small changes in the polyhedral coordination from the
solid state to the ionic liquid solution. The series presents high intrinsic emission quantum efficiencies,
90% ≥ QEu
Eu ≥ 53%. In addition, theoretical calculations on the intramolecular energy transfer (IET) reveal the
participation of the 7
F0→5
D1 and 7
F1→5
G2 transitions for the IET via S1 while the IET via T1 state is dominated by
the 7
F0→5
D1 and 7
F1→5
D0 transitions. Therefore, due to their high luminescent features, these Eu3+ tetrakis
complexes are potential candidates to be applied as optical markers in the solid-state or even in ionic liquid
solutions.
PAOLINI, TIAGO B.; ASSUNCAO, ISRAEL P.; COSTA, ISRAEL F.; BLOIS, LUCCA; FELINTO, MARIA C.F.C; MOURA JUNIOR, RONALDO T.; TEOTONIO, ERCULES E.S.; MALTA, OSCAR L.; CARNEIRO NETO, ALBANO N.; BRITO, HERMI F.
The influence of imidazolium counterions on the luminescence properties of Cnmim[Eu(tta)4] tetrakis complexes in solid-state and ionic liquid solutions.
Journal of Luminescence,
v. 263,
p. 1-11,
2023.
DOI:
10.1016/j.jlumin.2023.120158.
Disponível em: http://repositorio.ipen.br/handle/123456789/34254. Acesso em: $DATA.
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SABINO, CAETANO P.; RIBEIRO, MARTHA S.
; WAINWRIGHT, MARK; ANJOS, CAROLINA dos; SELLERA, FABIO P.; DROPA, MILENA; NUNES, NATHALIA B.; BRANCINI, GUILHERME T.P.; BRAGA, GILBERTO U.L.; ARANA-CHAVEZ, VICTOR E.; FREITAS, RAUL O.; LINCOPAN, NILTON; BAPTISTA, MAURICIO S..
The biochemical mechanisms of antimicrobial photodynamic therapy.
Photochemistry and Photobiology,
v. 99,
n. 2,
p. 742-750,
2023.
DOI:
10.1111/php.13685
Abstract:
The unbridled dissemination of multidrug-resistant pathogens is a major threat to global health and urgently demands novel therapeutic alternatives. Antimicrobial photodynamic therapy (aPDT) has been developed as a promising approach to treat localized infections regardless of drug resistance profile or taxonomy. Even though this technique has been known for more than a century, discussions and speculations regarding the biochemical mechanisms of microbial inactivation have never reached a consensus on what is the primary cause of cell death. Since photochemically generated oxidants promote ubiquitous reactions with various biomolecules, researchers simply assumed that all cellular structures are equally damaged. In this study, biochemical, molecular, biological and advanced microscopy techniques were employed to investigate whether protein, membrane or DNA damage correlates better with dose-dependent microbial inactivation kinetics. We showed that although mild membrane permeabilization and late DNA damage occur, no correlation with inactivation kinetics was found. On the other hand, protein degradation was analyzed by three different methods and showed a dose-dependent trend that matches microbial inactivation kinetics. Our results provide a deeper mechanistic understanding of aPDT that can guide the scientific community toward the development of optimized photosensitizing drugs and also rationally propose synergistic combinations with antimicrobial chemotherapy.
Palavras-Chave:
antimicrobial agents;
photodynamic therapy;
biochemical reaction kinetics;
microbial drug resistance
SABINO, CAETANO P.; RIBEIRO, MARTHA S.; WAINWRIGHT, MARK; ANJOS, CAROLINA dos; SELLERA, FABIO P.; DROPA, MILENA; NUNES, NATHALIA B.; BRANCINI, GUILHERME T.P.; BRAGA, GILBERTO U.L.; ARANA-CHAVEZ, VICTOR E.; FREITAS, RAUL O.; LINCOPAN, NILTON; BAPTISTA, MAURICIO S.
The biochemical mechanisms of antimicrobial photodynamic therapy.
Photochemistry and Photobiology,
v. 99,
n. 2,
p. 742-750,
2023.
DOI:
10.1111/php.13685.
Disponível em: http://repositorio.ipen.br/handle/123456789/34012. Acesso em: $DATA.
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BLAAUW, MENNO; D'AGOSTINO, GIANCARLO; DI LUZIO, MARCO; DUNG, HO MANH; JACIMOVIC, RADOJKO; DIAS, MAURO da S.
; SEMMLER, RENATO
; VAN SLUIJS, ROBBERT; BARRADAS, NUNO P..
The 2021 IAEA software intercomparison for k0‑INAA.
Journal of Radioanalytical and Nuclear Chemistry,
v. 332,
n. 8,
p. 3387-3400,
2023.
DOI:
10.1007/s10967-022-08626-1
Abstract:
In order to establish the variation between results in mass fractions due to software implementation, as measured by the
k0-method for INAA, the IAEA has organized a software intercomparison. A complete set of test spectra and associated
information was assembled. Efficiency curves, neutron spectrum parameters, correction factors and mass fractions were
calculated with the participating programs (k0-IPEN, k0-INRIM, k0-DALAT, k0-IAEA and KayWin) using identical peak
areas. In this paper, we report on the observed discrepancies, causes, remedies and future software developments. The test
data, as well as intermediate results and observed mass fractions of the certified reference material BCR-320R “channel
sediment” are available through the IAEA on request. The variations in concentrations attributed to differences between the
programs were initially found to be 5.6 and 7.9%, for certified and uncertified concentrations, respectively. After the certified
concentrations had been made available to the participants and they had been allowed to improve their programs, the
variations found were 2.7 and 3.4%, respectively. The main identified remaining causes of variation are differences in the
procedures used for detector efficiency characterisation and neutron spectrum parameter determination.
Palavras-Chave:
ge semiconductor detectors;
interlaboratory comparisons;
neutron activation analysis;
neutron flux;
triga type reactors
BLAAUW, MENNO; D'AGOSTINO, GIANCARLO; DI LUZIO, MARCO; DUNG, HO MANH; JACIMOVIC, RADOJKO; DIAS, MAURO da S.; SEMMLER, RENATO; VAN SLUIJS, ROBBERT; BARRADAS, NUNO P.
The 2021 IAEA software intercomparison for k0‑INAA.
Journal of Radioanalytical and Nuclear Chemistry,
v. 332,
n. 8,
p. 3387-3400,
2023.
DOI:
10.1007/s10967-022-08626-1.
Disponível em: http://repositorio.ipen.br/handle/123456789/34185. Acesso em: $DATA.
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AYLLON, R.M.
; FURLAN, M.R.; EL HAJJ, T.M.; SILVA, P.S.C.
.
Th-232 radiological aspects of carbonate niobium mining waste use as agricultural amendment.
Brazilian Journal of Radiation Sciences,
v. 11,
n. 1A,
p. 1-21,
2023.
DOI:
10.15392/2319-0612.2023.2223
Abstract:
The use of mining residues in agriculture may be possible, as long as there be previous studies in different areas,
one of them being the analysis of the involved radionuclides behavior. This study determined the concentrations
of 232Th activity in soil, soil treated with lime, soil with carbonate residue from niobium mining, soil with the
mixture of lime and carbonate, in two moments. The transfer factor of 232Th from the soil to the plant was analyzed, in this case, lettuce (n=20), in the different types of treatment and in two moments. The addition of carbonate to the soils did not significantly alter the levels of radioactivity for 232Th radionuclide in lettuce. The effective dose resulting from the lettuce ingestion varied from 0.09 to 0.3 µSv y-1.
Palavras-Chave:
agriculture;
carbonates;
mining;
neutron activation analysis;
niobium;
radiation protection;
soils;
tailings;
thorium 232
AYLLON, R.M.; FURLAN, M.R.; EL HAJJ, T.M.; SILVA, P.S.C.
Th-232 radiological aspects of carbonate niobium mining waste use as agricultural amendment.
Brazilian Journal of Radiation Sciences,
v. 11,
n. 1A,
p. 1-21,
2023.
DOI:
10.15392/2319-0612.2023.2223.
Disponível em: http://repositorio.ipen.br/handle/123456789/34220. Acesso em: $DATA.
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MANHANI, KELLY C.; LACERDA, JOAO P.A. de; NAKANO, VIVIANE E.; CRUZ, LUCAS M.S.; COSTA, ALAN R.; BUSTILLOS, JOSE O.W.V.
.
Técnicas analíticas para o controle de resíduos de agrotóxicos em alimentos cítricos / Analytical techniques for pesticide residues control in citrus foodstuffs.
Revista IPT,
v. 8,
n. 23,
p. 61-82,
2023.
Abstract:
O Brasil é o maior produtor mundial de laranja, responsável pela exportação de três
quartos de suco de laranja consumidos no mundo. Devido a posição de destaque na
cadeia agroindustrial, a segurança alimentar é item fundamental para garantir a sustentabilidade produtiva, qualidade e competitividade de mercado. Dado a sua importância,
com o objetivo de avaliar a qualidade dos citros, neste trabalho foram estudados três
métodos de extração: “QuEChERS ORIGINAL”, “QuEChERS Acetato MODIFICADO” e
extração Líquido-Líquido, com a utilização dos equipamentos GC/ECD e GC/MS para
quantificação e confirmação dos analitos. O método QuEChERS está revolucionando o
preparo de amostras de matrizes complexas, e neste estudo, foram avaliados a mudança
de pH na extração bem como a proporção de amostra e adição de diferentes sais e adsorventes na etapa de limpeza da amostra (Clean Up) para a eficiência da extração dos
ingredientes ativos. Parâmetros de qualidade analítica como seletividade/efeito matriz,
linearidade, limite de detecção e quantificação foram estabelecidos para cinco agrotóxicos: Trifluralina, Clorotalonil, Clorpirifós, Dicofol e Azoxistrobina. Foram analisadas
um total de 26 amostras de laranja Pêra e suco de laranja, coletadas em feiras livres,
supermercados, sítios com produção local e restaurantes da cidade de São Paulo, dentre
as quais, três amostras de suco analisadas durante o desenvolvimento apresentaram
indícios do agrotóxico Dicofol, proibido pela legislação brasileira.
MANHANI, KELLY C.; LACERDA, JOAO P.A. de; NAKANO, VIVIANE E.; CRUZ, LUCAS M.S.; COSTA, ALAN R.; BUSTILLOS, JOSE O.W.V.
Técnicas analíticas para o controle de resíduos de agrotóxicos em alimentos cítricos.
Revista IPT,
v. 8,
n. 23,
p. 61-82,
2023.
Disponível em: http://repositorio.ipen.br/handle/123456789/34355. Acesso em: $DATA.
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SANTOS, BIANCA P.S.
; BARBOSA, ANDREY S.
; KODAMA, YASKO
; THIAGO, QUEIROZ B. de; SANTIAGO, ELISABETE I.
.
Tailoring highly stable anion exchange membranes with graft molecular structure ordering using reversible addition-fragmentation chain transfer polymerization for alkaline fuel cells.
Journal of Membrane Science,
v. 687,
p. 1-12,
2023.
DOI:
10.1016/j.memsci.2023.122071
Abstract:
The radiation-induced grafting is used to prepare a variety of anion-exchange membranes (AEM) based on poly
(ethylene-co-tetrafluoroethylene) (ETFE) utilizing a reversible addition-fragmentation chain transfer (RAFT)
agent. The copolymerization process is controlled by the RAFT agent, resulting in AEMs with a restricted molecular weight dispersion. As a result, RAFT-AEMs exhibit decreased water uptake and reduced swelling. A
significant improvement in thermal and mechanical characteristics is evidenced, while the conductivity remains
practically unaltered. Anion-exchange membrane fuel cell (AEMFC) tests revealed that conventional RIG-AEMs
and RAFT-AEMs with low RAFT content (5 wt%) have comparable beginning-of-life performances (~0.95 W
cm− 2
). However, for higher RAFT contents, the performance trends to decrease indicating an imbalance in water
management. Furthermore, short-term stability tests suggest that RAFT-AEMs are able to operate highly stable,
with a conductivity rate loss of 0.05% h− 1
, which represents an improvement of 160% in comparison to conventional RIG-AEM. AFM analysis demonstrated that structural ordering molecular and morphology tailor the
fundamental properties of ETFE-based AEMs, combining enhanced performance and stability for alkaline fuel
cell applications.
SANTOS, BIANCA P.S.; BARBOSA, ANDREY S.; KODAMA, YASKO; THIAGO, QUEIROZ B. de; SANTIAGO, ELISABETE I.
Tailoring highly stable anion exchange membranes with graft molecular structure ordering using reversible addition-fragmentation chain transfer polymerization for alkaline fuel cells.
Journal of Membrane Science,
v. 687,
p. 1-12,
2023.
DOI:
10.1016/j.memsci.2023.122071.
Disponível em: http://repositorio.ipen.br/handle/123456789/34255. Acesso em: $DATA.
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MELO, A.D.; SILVA, J.P. da; NOBRE, F.X.; COSTA, S.; SALES JUNIOR, J.C.C.; ANGLADA-RIVERA, J.; GUERRERO, F.; PAULA, M.M. da S.; SOUZA, R.F.B. de
; PENA-GARCIA R.; AGUILERA, L.; LEYET, Y..
Synthesis microwave-assisted: fast method to obtain lithium-doped sodium titanate.
Journal of Materials Science: Materials in Electronics,
v. 34,
n. 6,
p. 1-10,
2023.
DOI:
10.1007/s10854-023-09948-w
Abstract:
In this work, the variation in the structural and electrical properties of lithium-doped sodium titanate, obtained from an ultrafast (15 min) microwave-assisted synthesis has been reported. X-ray diffraction and Rietveld analysis have been done to identify the present phases, their composition, and lattice parameters. Na2Ti3O7 was identified as the major phase, while Na2Ti6O13 was obtained as a secondary phase in all samples. The phase composition usually varies depending on the content of the doping element. In the sample with 0.5% lithium ions, an additional phase corresponding to NaLiTi3O7 appeared. The microstructure of the ceramic samples showed an increase in the grains size and the appearance of small particles on the surface of the grains. This effect becomes more evident for the samples with 0.5% Li. Finally, the electrical properties of the ceramic samples studied were favored with an increase in doping and σdc values of 1.94 × 10− 5 S cm− 1, 2.51 × 10− 5 S cm− 1, and 4.00 × 10− 5 S cm− 1 were determined for Na2 − xLixTi3O7 with x = 0.0%, 0.1%, 0.5% of Li+.
Palavras-Chave:
sodium compounds;
titanates;
microwave radiation;
lithium;
doped materials
MELO, A.D.; SILVA, J.P. da; NOBRE, F.X.; COSTA, S.; SALES JUNIOR, J.C.C.; ANGLADA-RIVERA, J.; GUERRERO, F.; PAULA, M.M. da S.; SOUZA, R.F.B. de; PENA-GARCIA R.; AGUILERA, L.; LEYET, Y.
Synthesis microwave-assisted: fast method to obtain lithium-doped sodium titanate.
Journal of Materials Science: Materials in Electronics,
v. 34,
n. 6,
p. 1-10,
2023.
DOI:
10.1007/s10854-023-09948-w.
Disponível em: http://repositorio.ipen.br/handle/123456789/33990. Acesso em: $DATA.
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LOPES, ISABELA S.; CASSAS, FERNANDO; VEIGA, THIAGO A.M.; SILVA, FLAVIA R. de O.
; COURROL, LILIA C..
Synthesis and characterization of Eugenia uniflora L. silver nanoparticles and L-cysteine sensor application.
Chemistry and Biodiversity,
v. 20,
n. 1,
p. 1-12,
2023.
DOI:
10.1002/cbdv.202200787
Abstract:
L-Cysteine (Cys) is a non-essential sulfur-containing amino acid, crucial for protein synthesis, detoxification, and several metabolic functions. Cys is widely used in the agricultural, food, cosmetic, and pharmaceutical industries. So, a suitable sensitive and selective sensing approach is of great interest, and a low-cost sensor would be necessary. This article presents silver nanoparticles (EuAgNPs) synthesized by a green synthesis method using Eugenia uniflora L. extracts and photoreduction. The nanoparticles were characterized by UV/VIS, transmission electron microscopy, high-performance liquid chromatography (HPLC), FTIR, and Zeta potential. With the addition of Cys in the EuAgNPs solution, the terminal thiol part of L-cysteine binds on the surface of nanoparticles through Ag−S bond. The EuAgNPs and CysAgNPs coexist until flavonoids bound the amino group of Cys, enhancing the red color of solutions. The EuAgNPs provided selectivity to detect Cys among other amino acids, and its detection limit was found to be 3.8 nM. The sensor has the advantages of low-cost synthesis, fast response, high selectivity, and sensitivity.
Palavras-Chave:
trees;
cysteine;
amino acids;
silver;
nanoparticles;
photochemistry;
reduction
LOPES, ISABELA S.; CASSAS, FERNANDO; VEIGA, THIAGO A.M.; SILVA, FLAVIA R. de O.; COURROL, LILIA C.
Synthesis and characterization of Eugenia uniflora L. silver nanoparticles and L-cysteine sensor application.
Chemistry and Biodiversity,
v. 20,
n. 1,
p. 1-12,
2023.
DOI:
10.1002/cbdv.202200787.
Disponível em: http://repositorio.ipen.br/handle/123456789/33978. Acesso em: $DATA.
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CECCHI, CLAUDIA R.
; ALSING, SIDSEL; JESUS, GUSTAVO P.P.
; ZACARIAS, ENIO A.
; KJAER, LISBETH; CLEMENT, MICHELLE S.; KUMAGAI-BRAESCH, MAKIKO; CORYDON, THOMAS J.; BARTOLINI, PAOLO
; PERONI, CIBELE N.
; AAGAARD, LARS.
Sustained secretion of human growth hormone from TheraCyte devices encapsulated with PiggyBac-engineered retinal pigment epithelium cells.
Tissue and Cell,
v. 82,
p. 1-13,
2023.
DOI:
10.1016/j.tice.2023.102095
Abstract:
Growth hormone (GH) deficiency is characterized by impaired growth and development, and is currently treated by repeated administration of recombinant human GH (hGH). Encapsulated cell therapy (ECT) may offer a less demanding treatment-strategy for long-term production and release of GH into circulation. We used PiggyBac-based (PB) transposon delivery for engineering retinal pigment epithelial cells (ARPE-19), and tested a series of viral and non-viral promoters as well as codon-optimization to enhance transgene expression. Engineered cells were loaded into TheraCyte macrocapsules and secretion was followed in vitro and in vivo. The cytomegalovirus (CMV) promoter supports strong and persistent transgene expression, and we achieved clonal cell lines secreting over 6 µg hGH/106 cells/day. Codon-optimization of the hGH gene did not improve secretion. ARPE-19 cells endured encapsulation in TheraCyte devices, and resulted in steady hormone release for at least 60 days in vitro. A short-term pilot experiment in immunodeficient SCID mice demonstrated low systemic levels of hGH from a single 40 µL capsule implanted subcutaneously. No significant increase in weight increase or systemic hGH was detected after 23 days in the GH-deficient lit/SCID mouse model using 4.5 µL capsules loaded with the highest secreting clone of ARPE-19 cells. Our results demonstrate that PB-mediated engineering of ARPE-19 is an efficient way to generate hormone secreting cell lines compatible with macroencapsulation, and our CMV-driven expression cassette allows for identification of clones with high level and long-term secretory activity without addition of insulator elements. Our results pave the way for further in vivo studies of encapsulated cell therapy.
Palavras-Chave:
hormones;
sth;
epithelium;
pigments;
therapy
CECCHI, CLAUDIA R.; ALSING, SIDSEL; JESUS, GUSTAVO P.P.; ZACARIAS, ENIO A.; KJAER, LISBETH; CLEMENT, MICHELLE S.; KUMAGAI-BRAESCH, MAKIKO; CORYDON, THOMAS J.; BARTOLINI, PAOLO; PERONI, CIBELE N.; AAGAARD, LARS.
Sustained secretion of human growth hormone from TheraCyte devices encapsulated with PiggyBac-engineered retinal pigment epithelium cells.
Tissue and Cell,
v. 82,
p. 1-13,
2023.
DOI:
10.1016/j.tice.2023.102095.
Disponível em: http://repositorio.ipen.br/handle/123456789/34084. Acesso em: $DATA.
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FERREIRA, MAURICIO L.; DALMAS, FABRICIO B.; SANTANNA, MARYLY; RODRIGUES, ELAINE A.
; SODRE, MARCELO G..
Sustainable development in São Paulo's Green Belt Biosphere Reserve: between the void of municipal environmental policies and the ecosystem management of the territory
/ Desenvolvimento sustentável na Reserva da Biosfera do Cinturão Verde de São Paulo: entre o vazio das políticas ambientais municipais e a gestão ecossistêmica do território.
Revista de Gestao Ambiental e Sustentabilidade,
v. 12,
n. 1,
p. 1-37,
2023.
DOI:
10.5585/2023.22940
Abstract:
Introduction: The Green Belt Biosphere Reserve, with 2.33 million hectares and its internal
urban area with 220 thousand hectares, is configured as a water security territory and
expresses a direct relationship between urban development and areas that ensure well-being
and ecosystem services for 12% of Brazil's population. With seventy-eight municipalities that
fully or partially integrate the GBBR, the socioeconomic differences and the different contexts
of urbanization and governance reflect on territorial management at the local level and impact
the environmental and regional sustainable development agendas.
Objective: Based on a survey of environmental policies and correlations between economic
and socio-environmental indicators on a municipal scale for the entire study area, this article
assesses the level of development of the main environmental public policies and identifies the
relationship between these policies and socio-environmental indicators.
Originality: Although the Green Belt Biosphere Reserve is an area recognized by the United
Nations (UN), the management of its territory depends on municipal actions that comprise it.
Little attention has been paid to environmental management, especially in terms of public
environmental policies and a broad and ongoing understanding of the conservation of this
area.
Results: The analysis shows that the different municipalities in the GBBR have different levels
of implementation regarding Environmental Agenda. When considering the Municipal Plans
for Urban Afforestation, Adaptation to Climate Change, Atlantic Forest and Solid Waste, only Guarujá, Mogi das Cruzes, Santos and São Paulo have these four policies in preparation or
completed, while for 33.3% (n=25) of the municipalities, none of these agendas was
developed, and a positive correlation was identified between the HDI and the largest number
of implemented policies.
Contribution: Large and medium-sized cities in the state of Sao Paulo, Brazil, present studies
addressing ecological patterns and processes, however, they do not address specific
questions on the environmental sector itself, which this paper aimed at providing.
Conclusion: As the Green Belt accounts for 72% of the volume of drinking water in all of São
Paulo, the disparities between the municipal indicators analyzed reinforce the need to adopt
the GBBR as a platform for adequate governance to integrate policies at different scales for
sustainable regional development. Systemic efforts are needed, especially at the municipal
scale, in order to carry out adequate environmental management of the GBBR territory.
FERREIRA, MAURICIO L.; DALMAS, FABRICIO B.; SANTANNA, MARYLY; RODRIGUES, ELAINE A.; SODRE, MARCELO G.
Sustainable development in São Paulo's Green Belt Biosphere Reserve: between the void of municipal environmental policies and the ecosystem management of the territory.
Revista de Gestao Ambiental e Sustentabilidade,
v. 12,
n. 1,
p. 1-37,
2023.
DOI:
10.5585/2023.22940.
Disponível em: http://repositorio.ipen.br/handle/123456789/34351. Acesso em: $DATA.
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STIPP, WAGNER
; MORAIS, NATHANAEL W.S.
; MARTINS, JOSÉ V.; MATOS, PRISCILA
; ROSSI, JESUALDO L.
; ROSSI, WAGNER de
; RAELLE, MARCUS P.
.
Surface contaminants’ incorporation after nanosecond laser ablation.
Journal of Radioanalytical and Nuclear Chemistry,
v. 332,
n. 11,
p. 4535-4540,
2023.
DOI:
10.1007/s10967-023-09153-3
Abstract:
Decontamination and cleaning of surface-contaminated radioactive waste using laser ablation is a promising new technique
being researched. One advantage is the potential to recycle waste and reduce the demand for repository storage. However,
prior studies have shown that residual radioactivity can persist after laser decontamination indicating the incorporation of
contaminants beneath the surface of metal samples. In this study, a q-switched laser was used to measure the depth of the
recast zone at various fluences and simulate a decontamination process using a gold-coated sample. The results showed
that surface material was found in the recast zone for fluences ranging from 1 to 10 J/cm2. This suggests that incorporation
of surface contaminants after laser ablation is an important issue that must be considered before using this technique for
radioactive waste treatment.
STIPP, WAGNER; MORAIS, NATHANAEL W.S.; MARTINS, JOSÉ V.; MATOS, PRISCILA; ROSSI, JESUALDO L.; ROSSI, WAGNER de; RAELLE, MARCUS P.
Surface contaminants’ incorporation after nanosecond laser ablation.
Journal of Radioanalytical and Nuclear Chemistry,
v. 332,
n. 11,
p. 4535-4540,
2023.
DOI:
10.1007/s10967-023-09153-3.
Disponível em: http://repositorio.ipen.br/handle/123456789/34337. Acesso em: $DATA.
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SEPULVEDA, ANDERSON F.; KUMPGDEE-VOLLRATH, MONT; FRANCO, MARGARETH K.K.D.
; YOKAICHIYA, FABIANO; ARAUJO, DANIELE R. de.
Supramolecular structure organization and rheological properties modulate the performance of hyaluronic acid-loaded thermosensitive hydrogels as drug-delivery systems.
Journal of Colloid and Interface Science,
v. 630,
n. Part B,
p. 328-340,
2023.
DOI:
10.1016/j.jcis.2022.10.064
Abstract:
The challenges for developing new pharmaceutical formulations based on natural and synthetic polymers has led to innovation into the design of systems responsive environmental stimuli such as temperature. However, the presence of hydrophilic or hydrophobic molecules, charged groups, or metallic elements can affect their structural behavior and their biopharmaceutical performance This work aims to study and characterize the morphology and structure of polymeric formulations based on Poloxamer (PL) 407 (15 % and 30 % m/v) and its binary with PL 338 (15 % PL 407 + 15 % PL 338) and hyaluronic acid (0.5 % m/v), as drug delivery systems of local anesthetic bupivacaine (0.5 % m/v) and ropivacaine (0.5 % m/v) hydrochloride. For this, it was performed SANS analysis for determination of supramolecular organization and lattice parameters; calorimetry was done to characterize their thermodynamic parameters; rheological analysis flow curve, consistency and adhesion calculation, Maxwell model study. Also, it was performed drug release profiles and calculation of diffusion coefficients. It was identified lamellar structures in PL 407 15 % formulations, and coexistence of cubic and hexagonal phases in PL 407 30 % and binary formulations, however hyaluronic acid, bupivacaine or ropivacaine seem do not affect the type of supramolecular structure. In addition, these additives can modulate viscosity among poloxamers chains, increasing micelle-micelle interactions as it happens in presence of bupivacaine. On the other hand, addition of hyaluronic acid can promote increased structural stabilization by hydrophilic interactions between hyaluronic and micellar corona. It reflects the ability how to control the drug release, as in case of binary system that retained bupivacaine for longer time than other systems, as well it happens when hyaluronic acid is added in PL 407 15 % and PL 407 30 %.
Palavras-Chave:
copolymers;
hydrogels;
drug delivery
SEPULVEDA, ANDERSON F.; KUMPGDEE-VOLLRATH, MONT; FRANCO, MARGARETH K.K.D.; YOKAICHIYA, FABIANO; ARAUJO, DANIELE R. de.
Supramolecular structure organization and rheological properties modulate the performance of hyaluronic acid-loaded thermosensitive hydrogels as drug-delivery systems.
Journal of Colloid and Interface Science,
v. 630,
n. Part B,
p. 328-340,
2023.
DOI:
10.1016/j.jcis.2022.10.064.
Disponível em: http://repositorio.ipen.br/handle/123456789/33424. Acesso em: $DATA.
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PRADO, FELIPE M.
; FRANCO, TOMAS J.
; WETTER, NIKLAUS U.
.
Sub-nanosecond, 41 mJ pulse energy, passively Q-switched Nd:YLF laser.
Optics and Laser Technology,
v. 162,
p. 1-6,
2023.
DOI:
10.1016/j.optlastec.2023.109257
Abstract:
A sub-nanosecond, diode-stack side-pumped, passively Q-switched Nd3+:YLF4/Cr4+:YAG Laser is reported in a compact cavity design, generating one pulse of 41 mJ with a pulse width of 894 ps, achieving a peak output power of 46 MW and beam quality M2 of 5.4 × 5.9 (HxV). The number of pulses in the pulse train could be adjusted from one pulse to ten pulses of 111 mJ total output energy and 23.7 % optical efficiency by adjusting the focus distance while maintaining sub-nanosecond pulse duration. This resonator can also be used for high-power simultaneous Q-switched laser emission at 1047 nm and 1053 nm.
Palavras-Chave:
q-switching;
high energy physics;
crystals;
pumping
PRADO, FELIPE M.; FRANCO, TOMAS J.; WETTER, NIKLAUS U.
Sub-nanosecond, 41 mJ pulse energy, passively Q-switched Nd:YLF laser.
Optics and Laser Technology,
v. 162,
p. 1-6,
2023.
DOI:
10.1016/j.optlastec.2023.109257.
Disponível em: http://repositorio.ipen.br/handle/123456789/33997. Acesso em: $DATA.
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BERECZKI, ALLAN
; DIPOLD, JESSICA
; FREITAS, ANDERSON Z.
; WETTER, NIKLAUS U.
.
Sub-10 nm nanoparticle detection using multi-technique-based micro-raman spectroscopy.
Polymers,
v. 15,
n. 24,
p. 1-17,
2023.
DOI:
10.3390/polym15244644
Abstract:
Microplastic pollution is a growing public concern as these particles are ubiquitous in
various environments and can fragment into smaller nanoplastics. Another environmental concern
arises from widely used engineered nanoparticles. Despite the increasing abundance of these nanosized pollutants and the possibility of interactions with organisms at the sub cellular level, with
many risks still being unknown, there are only a few publications on this topic due to the lack of
reliable techniques for nanoparticle characterization. We propose a multi-technique approach for the
characterization of nanoparticles down to the 10 nm level using standard micro-Raman spectroscopy
combined with standard atomic force microscopy. We successfully obtained single-particle spectra
from 25 nm sized polystyrene and 9 nm sized TiO2 nanoparticles with corresponding mass limits of
detection of 8.6 ag (attogram) and 1.6 ag, respectively, thus demonstrating the possibility of achieving
an unambiguous Raman signal from a single, small nanoparticle with a resolution comparable to
more complex and time-consuming technologies such as Tip-Enhanced Raman Spectroscopy and
Photo-Induced Force Microscopy
BERECZKI, ALLAN; DIPOLD, JESSICA; FREITAS, ANDERSON Z.; WETTER, NIKLAUS U.
Sub-10 nm nanoparticle detection using multi-technique-based micro-raman spectroscopy.
Polymers,
v. 15,
n. 24,
p. 1-17,
2023.
DOI:
10.3390/polym15244644.
Disponível em: http://repositorio.ipen.br/handle/123456789/34438. Acesso em: $DATA.
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MARTINS, ROBERTO F.; FRIEHE, KARL; SILVA, CECILIA C.G. e
; LAZAR, DOLORES R.R.
; COUTO, ANTONIO A.
; LIMA, CARLOS R.C..
Study on the attack of molten silicates on Plasma-Sprayed thermal barrier coatings.
Journal of Minerals and Materials Characterization and Engineering,
v. 11,
n. 5,
p. 115-130,
2023.
DOI:
10.4236/jmmce.2023.115010
Abstract:
Thermal barrier coating (TBC) revolutionized the industry by allowing higher
operating temperatures for equipment, such as gas turbines in the aeronautical
industry. However, at high temperatures, the TBC is exposed to the attack of
molten silicates, known as CMAS (Calcium-Magnesium-Alumino-Silicate),
which are particles from the environment that infiltrate the TBC, causing delamination. In this study, samples coated with TBC by thermal spray and
covered with CMAS were evaluated at temperatures of 1200˚C and 1250˚C.
For each temperature, exposure times of 1 h and 5 h were used. Samples with
longer exposure time had a considerable volume increase. The main contribution of this work was to demonstrate the non-wettability of the CMAS,
even in the 5-h heat treatments, which prevented its infiltration in the deeper
regions. The conditions to guarantee the formation of the silicate and its
consequent wettability are also discussed.
MARTINS, ROBERTO F.; FRIEHE, KARL; SILVA, CECILIA C.G. e; LAZAR, DOLORES R.R.; COUTO, ANTONIO A.; LIMA, CARLOS R.C.
Study on the attack of molten silicates on Plasma-Sprayed thermal barrier coatings.
Journal of Minerals and Materials Characterization and Engineering,
v. 11,
n. 5,
p. 115-130,
2023.
DOI:
10.4236/jmmce.2023.115010.
Disponível em: http://repositorio.ipen.br/handle/123456789/34256. Acesso em: $DATA.
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CIRALDO, IRENE; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; BURRELLO, S.; SPATAFORA, A.; GARGANO, A.; DE GREGORIO, G.; MAGANA VSEVOLODOVNA, R.I.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; MEDINA, N.H.; MORALLES, M.
; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SANTOPINTO, E.; SGOUROS, O.; GUAZZELLI, M.A.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B..
Study of the one-neutron transfer reaction in 18O + 76Se collision at 275 MeV in the context of the NUMEN project.
Journal of Physics: Conference Series,
v. 2453,
p. 1-8,
2023.
DOI:
10.1088/1742-6596/2453/1/012013
Abstract:
Heavy-ion one-nucleon transfer reactions are promising tools to investigate singleparticle configurations in nuclear states, with and without the excitation of the core degrees
of freedom. An accurate determination of the spectroscopic amplitudes of these configurations
is essential for the study of other direct reactions as well as beta-decays. In this context, the
76Se(18O,17O)77Se one-neutron transfer reaction gives a quantitative access to the relevant single
particle orbitals and core polarization transitions built on 76Se. This is particularly relevant,
since it provides data-driven information to constrain nuclear structure models for the 76Se
nucleus.
The excitation energy spectrum and the differential cross section angular distributions of this
nucleon transfer reaction was measured at 275 MeV incident energy for the first time using the
MAGNEX large acceptance magnetic spectrometer. The data are compared with calculations
based on distorted wave Born approximation and coupled channel Born approximation adopting
spectroscopic amplitudes for the projectile and target overlaps derived by large-scale shell model
calculations and interacting boson-fermion model.
These reactions are studied in the frame of the NUMEN project. The NUMEN (NUclear Matrix
Elements for Neutrinoless double beta decay) project was conceived at the Istituto Nazionale di
Fisica Nucleare–Laboratori Nazionali del Sud (INFN-LNS) in Catania, Italy, aiming at accessing
information about the nuclear matrix elements (NME) of neutrinoless double beta decay (0νββ)
through the study of the heavy-ion induced double charge exchange (DCE) reactions on various
0νββ decay candidate targets. Among these, the 76Se nucleus is under investigation since it is
the daughter nucleus of 76Ge in the 0νββ decay process.
Palavras-Chave:
nuclear matrix;
matrix elements;
transfer reactions;
heavy ion reactions
CIRALDO, IRENE; CAPPUZZELLO, F.; CAVALLARO, M.; CARBONE, D.; BURRELLO, S.; SPATAFORA, A.; GARGANO, A.; DE GREGORIO, G.; MAGANA VSEVOLODOVNA, R.I.; ACOSTA, L.; AGODI, C.; AMADOR-VALENZUELA, P.; BORELLO-LEWIN, T.; BRISCHETTO, G.A.; CALABRESE, S.; CALVO, D.; CAPIROSSI, V.; CHAVEZ LOMELI, E.R.; COLONNA, M.; DELAUNAY, F.; DJAPO, H.; EKE, C.; FINOCCHIARO, P.; FIRAT, S.; FISICHELLA, M.; FOTI, A.; HACISALIHOGLU, A.; IAZZI, F.; LA FAUCI, L.; LINARES, R.; MEDINA, N.H.; MORALLES, M.; OLIVEIRA, J.R.B.; PAKOU, A.; PANDOLA, L.; PETRASCU, H.; PINNA, F.; RUSSO, G.; SANTOPINTO, E.; SGOUROS, O.; GUAZZELLI, M.A.; SOLAKCI, S.O.; SOUKERAS, V.; SOULIOTIS, G.; TORRESI, D.; TUDISCO, S.; YILDIRIM, A.; ZAGATTO, V.A.B.
Study of the one-neutron transfer reaction in 18O + 76Se collision at 275 MeV in the context of the NUMEN project.
Journal of Physics: Conference Series,
v. 2453,
p. 1-8,
2023.
DOI:
10.1088/1742-6596/2453/1/012013.
Disponível em: http://repositorio.ipen.br/handle/123456789/34099. Acesso em: $DATA.
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QUEIROZ, FERNANDA M.; RIBEIRO, GLEICY de L.X.; CASTRO, RENATO S. de; SANTOS, ROGERIO G. dos; VIEIRA, ALEXANDRE
; TERADA, MAYSA; BUGARIN, ALINE de F.S.; ROSSI, WAGNER de
; COSTA, ISOLDA
.
Study of the effect of nanosecond laser texturing on the corrosion behavior of Ti6Al4V and Ti6Al4V parts produced by powder bed fusion.
Materials Performance and Characterization,
v. 12,
n. 3,
p. 341-350,
2023.
DOI:
10.1520/MPC20220109
Abstract:
Combining metallic additive manufacturing with laser texturing could be an alternative in obtaining parts with functional hydrophilic surfaces, which improves osteointegration. Careful study of the corrosion behavior of the surfaces obtained is necessary, because the evolution of this phenomenon can influence the osteointegration of the implant, causing the release of metal ions in the body and even the rejection of the component. This study compared the corrosion behavior of laser texturing Ti6Al4V components with components manufactured using laser power bed fusion of the same alloy followed by laser texturing. Their microstructure, roughness, wettability, and electrochemical behavior were analyzed, and different morphologies and microtopographies were observed comparing both samples. The electrochemical tests obtained indicate that Ti6Al4V showed higher corrosion resistance than L-PBF Ti6Al4V after laser texturing. The results suggest that laser texturing can encourage cell proliferation and osseointegration on the surface of Ti6Al4V biomedical implants.
QUEIROZ, FERNANDA M.; RIBEIRO, GLEICY de L.X.; CASTRO, RENATO S. de; SANTOS, ROGERIO G. dos; VIEIRA, ALEXANDRE; TERADA, MAYSA; BUGARIN, ALINE de F.S.; ROSSI, WAGNER de; COSTA, ISOLDA.
Study of the effect of nanosecond laser texturing on the corrosion behavior of Ti6Al4V and Ti6Al4V parts produced by powder bed fusion.
Materials Performance and Characterization,
v. 12,
n. 3,
p. 341-350,
2023.
DOI:
10.1520/MPC20220109.
Disponível em: http://repositorio.ipen.br/handle/123456789/34597. Acesso em: $DATA.
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LARA, J.A.C.
; ABBADE, L.
; MUCSI, C.S.
; NIZES, A.D.C.; ROSSI, J.L.
.
Study of Patchwelded Blanks Resistance Spot Welding (RSW) Before Hot Stamping with and without Heat Treatment Parameters.
Materials Research,
v. 26,
Suppl.1,
p. 1-8,
2023.
DOI:
10.1590/1980-5373-MR-2023-0053
Abstract:
In recent years, increasing automotive safety and energy efficiency has become a major concern in the automotive industry. Advanced high-strength steel (AHSS) was chosen for its weight reduction and high mechanical strength for the body in white (BIW). Specifically, it has been used in 22MnB5 steel press hardening type steel (PHS) with patchweld technology, which enables the production of reinforced and structural parts in a single stroke during the hot forming process. This study aimed to evaluate the resistance spot welding parameters for patchweld before hot stamping, considering the minimum and maximum residual stress, while ensuring a welding nugget diameter within the approved range. Microhardness and X-ray diffraction were used to analyze the welding zones for phase identification and residual stress measurements. After five weeks of elapsed time, the spot weld showed cracks that were not seen immediately after welding and were probably due to a high residual stress state.
LARA, J.A.C.; ABBADE, L.; MUCSI, C.S.; NIZES, A.D.C.; ROSSI, J.L.
Study of Patchwelded Blanks Resistance Spot Welding (RSW) Before Hot Stamping with and without Heat Treatment Parameters.
Materials Research,
v. 26,
p. 1-8,
2023.
Suppl.1,
DOI:
10.1590/1980-5373-MR-2023-0053.
Disponível em: http://repositorio.ipen.br/handle/123456789/34357. Acesso em: $DATA.
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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.