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Navegação Eventos - Resumos por ano de publicação "2018"
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SOARES, E.P.
; CASINI, J.S.; FARIA, R.N.
; SILVA FILHO, J.C.
; TAKIISHI, H.
.
The influence of the addition of rGO and CNT on the electrochemical properties of the batteries the LaNi-Based Battery Alloys.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4062-4062.
Abstract:
In this article the results of the investigation are reported where batteries were made
from the negative electrodes of the alloy La0.7Mg0.3Al0.3Mn0.4Co0.5Ni3,8, without
annealing, adding 0, 1, 2, 5, 10% , both for carbon nanotube (CNT) and for reduced
graphene oxide (rGO) where the discharge capacity obtained during the
electrochemical characterization showed that in the addition of 1% rGO the discharge
capacity was 332 mAh and 1% CNT 364 mAh , being that the rGO batteries
maintaining better cyclic stability during the electrochemical test. The addition
materials CNT and rGO were characterized by high resolution MEV-FEV - Field
emission gun.
SOARES, E.P.; CASINI, J.S.; FARIA, R.N.; SILVA FILHO, J.C.; TAKIISHI, H.
The influence of the addition of rGO and CNT on the electrochemical properties of the batteries the LaNi-Based Battery Alloys.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4062-4062.
Disponível em: http://repositorio.ipen.br/handle/123456789/29539. Acesso em: $DATA.
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CRUZ, P.D.
; COSENTINO, I.C.
; GALEGO, E.
; YOSHIKAWA, D.
; FARIA, R.N.
.
The effect of vacuum annealing and HDDR processing on the electrochemical characteristics of activated carbon and graphene oxide for the production of supercapacitors electrodes.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 660-660.
Abstract:
Electric double-layer capacitors or electrochemical supercapacitors prepared using
activated carbons have been subjected to vacuum heat treatments at low and high
temperatures (200, 400, 600, 800 and 1000°C). The activated carbon electrodes have
been tested at a window potential of 1.1 V employing a KOH electrolyte (1.0 mol.L-1).
The effect of thermal treatment (vacuum or HDDR) upon the electrical properties has
been investigated by cyclic voltammetry and electrochemical impedance spectroscopy
(EIS). It has been shown that the specific capacitance at 5 msV-1 increases from 50
Fg-1 to 130 Fg-1 after a heat treatment at 400°C for 1 hour under back pump vacuum.
At this temperature the diminution in the specific capacitance with higher scanning rate
(10 msV-1) was much less pronounced (from 130 Fg-1 to 109 Fg-1). Equivalent series
resistance (ESR) and equivalent parallel resistance of supercapacitors electrodes
have also been investigated. Internal resistances of the supercapacitors were
calculated using the galvanostatic curves at several current densities (10-100 mAg-1).
BET analysis of the starting carbon and after thermal treatments have also been
carried out in this investigation. The activated structures have been studied using
scanning electron macroscopy (SEM) and X-ray diffraction. A compositional and
morphological evaluation of these electrodes showed no significant change on the
activated carbon structure. Reduced graphene oxide electrodes have also been
prepared in this investigation for a comparison.
CRUZ, P.D.; COSENTINO, I.C.; GALEGO, E.; YOSHIKAWA, D.; FARIA, R.N.
The effect of vacuum annealing and HDDR processing on the electrochemical characteristics of activated carbon and graphene oxide for the production of supercapacitors electrodes.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 660-660.
Disponível em: http://repositorio.ipen.br/handle/123456789/29648. Acesso em: $DATA.
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-
VARCA, G.H.C.
; FAZOLIN, G.N.
; FERREIRA, A.H.
; OLIVEIRA, J.P.R. de
; MARQUES, F.; LUGAO, A.B.
.
The effect of radiation dose rate over the formation of protein-based nanoparticles for nanosized delivery of chemo and radiotherapeutics.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 8875-8875.
Abstract:
Recent studies demonstrated the development of papain and bovine serum albumin
nanoparticles using gamma radiation (10 kGy) in presence of 20-30% (v/v) ethanol.
With the purpose of producing stable and well defined nanocarriers, this work aims to
determine the influence of different dose rates over protein nanoparticle formation. For
this purpose, papain and BSA nanoparticles were synthetized in phosphate buffer (50
mM, pH 7.2) and ethanol (20-30%, v/v) using a radiation dose of 10 kGy and dose rate
of 0.8, 2, 5 and 10 kGy.h-1. After irradiation, samples were evaluated by dynamic light
scattering, fluorescence and proteolytic activity to verify the size, secondary structure
and monitoring of the enzymatic activity, respectively. For papain nanoparticles it was
observed that the dose rate did not influence the particle size formation, however
crosslinking evidenced by bityrosine showed that samples irradiated at 0.8 and 5
kGy.h-1 presented higher bityrosine levels. On the other hand, BSA nanoparticles
presented different results if compared to papain NPs. Different dose rates caused
different and non-linear size increase for each condition, following the order: 5 > 10 >
0.8 > 2 kGy.h-1. However, in terms of crosslinking formation, a linear increase was
registered, as at 0.8 kGy.h-1 the smallest signal was achieved, whereas at 10 kGy.h-
1 the highest signal was recorded. In conclusion, BSA nanoparticles were more
sensitive to different radiation dose rates than nanopapain. Optimized results in terms
of size increase and higher bityrosine levels were observed for the samples irradiated
at 5 kGy.h-1, in which nanoparticle formation will occur faster if compared to the
synthesis carried out under distinct conditions. As final applications of the system
concert their use for the delivery of chemo or radiotherapeutics, the loading of
paclitaxel, a well-known chemotherapeutic agent, and radiolabeling with tecntetium-
99m, a radioisotope suitable for biomedical applications, have also been performed
with high efficiency, thus demonstrating a proof of concept of such systems.
Palavras-Chave:
albumins;
blood serum;
cattle;
cross-linking;
dose rates;
drug delivery;
fluorescence;
light scattering;
nanoparticles;
papain;
particle size;
proteins;
radiation doses;
radiation effects
VARCA, G.H.C.; FAZOLIN, G.N.; FERREIRA, A.H.; OLIVEIRA, J.P.R. de; MARQUES, F.; LUGAO, A.B.
The effect of radiation dose rate over the formation of protein-based nanoparticles for nanosized delivery of chemo and radiotherapeutics.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 8875-8875.
Disponível em: http://repositorio.ipen.br/handle/123456789/29677. Acesso em: $DATA.
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SOARES, J.J.S.
; SANTOS, P.S.
; ZAIM, M.H.; SAKATA, S.K.
.
The effect of gamma radiation on the stability of aqueous dispersions of graphene oxide and graphene oxide functionalized with amino-peg.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 2343-2343.
Abstract:
Nanocomposites based on graphene have been prominent in the field of biomedicine
due to the biocompatibility with the physiological medium and the possibility of being
functionalized by a series of biocompatible polymers, such as chitosan, polyethylene
glycol, poly (caprolactone), among others. However, there is a need for sterilization of
these nanomaterials in the medical field and gamma irradiation is a promising option.
In the present work graphene oxide (GO), produced by the modified Hummers method,
was functionalized with amino-PEG (GO-PEG-NH2) through the amidation process.
The objective of this study was to evaluate the aqueous dispersions stability of these
nanomaterials before and after gamma radiation (Cobalt 60) at a dose of 25 kGy.
Dynamics light scattering (DLS) was used to determine the zeta potential. The results
showed no significant differences between the zeta potentials of the non-irradiated and
irradiated graphene oxide. The dispersion of the functionalized graphene oxide
showed to be stable and the irradiated unstable.
SOARES, J.J.S.; SANTOS, P.S.; ZAIM, M.H.; SAKATA, S.K.
The effect of gamma radiation on the stability of aqueous dispersions of graphene oxide and graphene oxide functionalized with amino-peg.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 2343-2343.
Disponível em: http://repositorio.ipen.br/handle/123456789/29525. Acesso em: $DATA.
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MACHADO, C.S.C.
; DONATUS, U.
; ARAUJO, J.V.S.
; KLUMPP, R.E.
; MILAGRE, M.X.
; GIORJAO, R.A.R.; MOGILI, N.V.V.; COSTA, I.
.
The effect of FSW on microstructure and intergranular corrosion of the AA2198- T8 alloy.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 5162-5162.
Abstract:
In this investigation, the intergranular corrosion (IGC) resistance of the AA2198-T8
alloy welded by friction stir welding (FSW) was investigated by ASTM G110-97 test.
The different zones resulting from FSW showed distinct resistances to intergranular
attack depending on the heating and/or mechanical effects produced by welding. The
base metal (BM) was the most susceptible to IGC whereas the thermomechanically
affected zone (TMAZ) and the stir zone (SZ), presented the highest resistances to IGC
comparatively to the other zones. The results of IGC tests were correlated with those
of thermal simulation, microhardness measurements, transmission electron
microscopy (TEM) and optical microscopy (OM). The dissimilarities in corrosion
resistance of the various zones were associated to differences in hardening phase
quantities between the various zones. In the BM and HAZ, T1 phase, the main
hardening phase, was found at grain boundaries and it resulted in IGC susceptibility.
The slight IGC observed in the SZ and TMAZ was not associated with T1 phase which
was rarely found but to another precipitate (T2 phase) which was found preferentially
located at the grain boundaries in these zones.
Palavras-Chave:
microstructure;
intergranular corrosion;
aluminium alloys;
friction welding;
coatings;
welding;
transmission electron microscopy
MACHADO, C.S.C.; DONATUS, U.; ARAUJO, J.V.S.; KLUMPP, R.E.; MILAGRE, M.X.; GIORJAO, R.A.R.; MOGILI, N.V.V.; COSTA, I.
The effect of FSW on microstructure and intergranular corrosion of the AA2198- T8 alloy.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 5162-5162.
Disponível em: http://repositorio.ipen.br/handle/123456789/29571. Acesso em: $DATA.
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-
GUIMARAES, R.F.L.
; ROSSI, J.L.
.
A tecnique to make a shielding of uranium for transport of the radionuclide Mo-99.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 5715-5715.
Abstract:
The transporto f radionuclides to use in the nuclear medicine needs some care in such
way that people will be safety . For this, its used any security measures. One of this is
shielding of heavy materials such as uranium, technetium and lead. This work talk
about the process of the process of choosing uranium as a shielding material for
radionuclides such as Mo-99, used in the manufacture of technetium generators for
the diagnosis of cancer and other diseases, as well as the processes used to assemble
the shield.
GUIMARAES, R.F.L.; ROSSI, J.L.
A tecnique to make a shielding of uranium for transport of the radionuclide Mo-99.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 5715-5715.
Disponível em: http://repositorio.ipen.br/handle/123456789/29595. Acesso em: $DATA.
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-
PESQUEIRA, E.I.O.
; POLITANO, R.
; ROSSI, J.L.
; PORTO, G.S..
Technological trends of metallic materials for dental implants detected through patent analysis.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 3976-3976.
Abstract:
This research studies the innovation trends of metallic materials related to dental
implants using analysis of patent data. Methodology:The database was built through
the Derwent Innovation database, between 2007 and 2018. Initially the target patent
group was defined using the Keywords dental implant and subsequently a filter with
the keyword metal was applied, generating a database with 2796 patents. Patent map
analysis enables the detection of technological trends in metal materials over time,
identifying the assigned applicants and the countries where patents have been applied.
This data exposes the emerging technologies in the area of ??metallic materials for
dental implants and enables researchers and companies to observe in a new light their
application for health implants.
PESQUEIRA, E.I.O.; POLITANO, R.; ROSSI, J.L.; PORTO, G.S.
Technological trends of metallic materials for dental implants detected through patent analysis.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 3976-3976.
Disponível em: http://repositorio.ipen.br/handle/123456789/29537. Acesso em: $DATA.
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BARRERA, GERARDO R.; ALMEIDA, ADRIEL S.; JUNOT, DANILO O.
; SOUZA, DIVANIZIA do N..
Synthesis and TL and OSL characterization of (MgB2O4-MgB4O7): Ce:Li and (MgB2O4-MgB4O7): Dy:Li glasses for dosimetry.
In: RUBIO, MARCELO (Ed.); TIRAO, GERMAN (Ed.) INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 14th,
October 7-11, 2018,
Córdoba, Argentina.
Abstract...
Córdoba: Centro de Excelencia en Productos y Procesos,
2018.
p. 216-216.
BARRERA, GERARDO R.; ALMEIDA, ADRIEL S.; JUNOT, DANILO O.; SOUZA, DIVANIZIA do N.
Synthesis and TL and OSL characterization of (MgB2O4-MgB4O7): Ce:Li and (MgB2O4-MgB4O7): Dy:Li glasses for dosimetry.
In:
RUBIO, MARCELO (ed.); TIRAO, GERMAN (ed.) INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 14th,
October 7-11, 2018,
Córdoba, Argentina.
Abstract...
Córdoba: Centro de Excelencia en Productos y Procesos,
2018.
p. 216-216.
Disponível em: http://repositorio.ipen.br/handle/123456789/30248. Acesso em: $DATA.
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FLORIO, D.Z. de; TINTI, V.B.; FONSECA, F.C.
.
Synthesis and magnetic characterization of ni nanoparticles in ceramic matrix.
In: INTERNATIONAL CONGRESS ON CERAMICS, 7th; CONGRESSO BRASILEIRO DE CERÂMICA, 62.,
June 17-21, 2018,
Foz do Iguaçu, PR.
Abstract...
2018.
p. 512-512.
Abstract:
The production of nanoparticles by exsolution is a technique that has been extensively researched and improved recently. Exsolved particles have superior properties when compared to deposited particles. The method of exsolution consists in the reduction of previously solubilized ions in a matrix, giving rise to particles strongly attached to the substrate. Materials with compositions (La1-xSrx)z(Cr1-yNiy)O3-? (x and y = 0%, 5%, 10%, 15% and 20%, z = 100% and 80%) were synthesized using the polymerization of complexes technique. The resin produced in the synthesis process was analyzed using thermal analysis and the calcination temperature was determined to be 900 ° C. The X-ray diffraction technique was used to characterize structures and identify the present phases. All samples were reduced to create nanoparticles of metallic nickel by exsolution. Magnetic analysis was conducted to determine the magnetic behavior of the produced materials. Non-stoichiometric materials were synthesized to verify the influence of different stoichiometry in the exsolution process. Non-stoichiometric A site impaired the solubilization of Ni and Sr in the lanthanum chromite structure. All samples with dopants showed a decrease in the temperature of Neel of the lanthanum chromite. However, the reduction treatment caused an increase in the Neel temperature when compared to the oxidized samples. This is indicative of the decrease in nickel concentration in solid solution, a result consistent with the exsolution mechanism. Using the measurements of magnetism, it was possible to verify the mechanism of exsolution and mass fraction of metallic nickel for each sample. Using electron microscopy techniques, it was possible to detect the presence of nanoparticles after the reduction treatment with a diameter of approximately 20 nm. When performing a local chemical analysis using a transmission electron microscope, it was possible to verify that the particles in question are of metallic nickel.
Palavras-Chave:
nanoparticles;
resins;
ceramics;
x-ray diffraction;
magnetism;
matrix materials;
magnetic materials;
nickel
FLORIO, D.Z. de; TINTI, V.B.; FONSECA, F.C.
Synthesis and magnetic characterization of ni nanoparticles in ceramic matrix.
In:
INTERNATIONAL CONGRESS ON CERAMICS, 7th; CONGRESSO BRASILEIRO DE CERÂMICA, 62.,
June 17-21, 2018,
Foz do Iguaçu, PR.
Abstract...
2018.
p. 512-512.
Disponível em: http://repositorio.ipen.br/handle/123456789/29691. Acesso em: $DATA.
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QUEIROZ, CARLOS A. da S.
.
Synthesis and characterization of neodymium acetate for use in nanotechnology.
In: BRAZILIAN MRS MEETING, 17th,
September 16-20, 2018,
Natal, RN.
Abstract...
São Carlos: Aptor Software,
2018.
p. 1222-1222.
Abstract:
A simple and economical chemical process to obtaining neodymium acetate of
high purity was studied. The raw material in the form of mixed rare earths
carbonate comes from Brazilian monazite. It was used the technique of strong
cationic exchange resin, proper to water treatment to the neodymium''s
fractionation and it is achieved a purity of 99.9% in Nd2O3 and yield greater than
or equal 80%, with the elution of rare earths by EDTA solution in pH controlled.
The complex of EDTA-neodymium is transformed in neodymium oxide,
subsequently the oxide is dissolved in acetic acid to obtain the neodymium
acetate. The solid salt was characterized via chemical analysis, thermal analysis,
X ray diffraction, infrared spectroscopy and inductively coupled plasma mass
spectrometry to certify the purity.The analytical data collected allowed to
conclude that the stoichiometric formula for the compound is
Nd(CH3COO)3.1.5H2O. The typical neodymium acetate obtained (purity ≥
99.9%) contain the followings contaminants in micrograms per gram: Y(0.9), Sc
(5.1), La (1.0), Pr (3.4), Sm (12.8), Eu (1.1), Gd (15.4), Tb (2.9), Dy (5.3), Ho (7.4)
Er(1.5), Tm (0.3),Yb ( 2.5), Lu (1.0).
QUEIROZ, CARLOS A. da S.
Synthesis and characterization of neodymium acetate for use in nanotechnology.
In:
BRAZILIAN MRS MEETING, 17th,
September 16-20, 2018,
Natal, RN.
Abstract...
São Carlos: Aptor Software,
2018.
p. 1222-1222.
Disponível em: http://repositorio.ipen.br/handle/123456789/30324. Acesso em: $DATA.
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MOURA, ESPERIDIANA
; LODIS, ALINE
; REIS, PEDRO
; WELLEN, RENATE.
Synthesis and characterization of nanocrystalline hydroxyapatite derived from eggshell for biomedical applications.
In: AMERICAN CHEMICAL SOCIETY. DIVISION OF CELLULOSE & RENEWABLE MATERIALS. NATIONAL MEETING & EXPOSITION, 255th,
March 18-22, 2018,
New Orleans, LA.
Abstract...
2018.
Abstract:
Hydroxyapatite(HAP) a crystal-chemical analog of the bone tissue mineral component has been intensively
studied in recent years as a potential bone substitute in orthopedic and dentistry because of its biocompatibility,
biodegradability, bioactivity, and osteoconductive properties. Hydroxyapatite in a nanocrystalline state with uniform
size and morphology has many applications in different fields of medicine ranging from targeted drug delivery to
designed load-bearing implants. This work presents the synthesis and characterization of nanocrystalline
hydroxyapatite derived from hen’s eggshell waste for biomedical applications. Firstly, bio-hydroxyapatite was
synthesized by the wet precipitation method in which white hen’s eggshell waste was used. The white hen`s eggshells
were washed, dried and reduced to powder with particle size ≤ 30 μm. Then, the eggshell powder was subjected to a
heating cycle at 800 ° C for 3 hours to obtain calcium oxide. Calcium oxide was converted to bio-hydroxyapatite by the
addition of a solution of distilled water and phosphoric acid under magnetic stirring at 100 ° C, until a viscous slurry
was formed, which was oven dried at 110 ° C for 24 hours. The dried material was disintegrated and calcined at 900 °
C for 2 hours to obtain the hydroxyapatite phase. The bio-hydroxyapatite was irradiated with a high intensity ultrasonic
(20 kHz, and 450W/cm2) in order to obtain nanocrystalline hydroxyapatite. These synthesized nanocrystalline
hydroxyapatites have been characterized by XRD, FE-SEM, FTIR, and TG analyzes.
MOURA, ESPERIDIANA; LODIS, ALINE; REIS, PEDRO; WELLEN, RENATE.
Synthesis and characterization of nanocrystalline hydroxyapatite derived from eggshell for biomedical applications.
In:
AMERICAN CHEMICAL SOCIETY. DIVISION OF CELLULOSE & RENEWABLE MATERIALS. NATIONAL MEETING & EXPOSITION, 255th,
March 18-22, 2018,
New Orleans, LA.
Abstract...
2018.
Disponível em: http://repositorio.ipen.br/handle/123456789/29357. Acesso em: $DATA.
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TOMINAGA, F.K.
; SAKATA, S.K.
; SOARES, J.J.S.
; JACOVONE, R.M.S.
.
Synthesis and characterization of magnetic graphene oxide nanocomposites.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4680-4680.
Abstract:
Graphene oxide (GO) is a unique material that can be described as a single
monomolecular layer of graphite containing various oxygen functionalities such as
epoxide, carbonyl, carboxyl and hydroxyl groups. Chemical modifications at the
surface of the graphene oxide through the incorporation of magnetite can provide
magnetic properties to these nanomaterials. This work aims to synthesize and
characterize graphene oxide/magnetite (GO/M) nanocomposites, evaluating the
different proportions of incorporated magnetite. The synthesis of graphene
oxide/magnetite nanocomposites was performed by co-precipitation of iron salts on the
graphene oxide (GO) particles in alkaline medium. The characterization of the
nanocomposites was performed by thermogravimetric analysis (TGA), infrared
spectroscopy (FTIR), X-ray diffraction (XRD), nanoparticle tracking analysis (NTA) and
scanning electron microscopy (SEM). The thermogravimetric results showed the
incorporation of approximately 20, 50, 70 and 80% of magnetite to the graphene oxide.
Regarding the hydrodynamic size, for the magnetite, mode values of 31.3 ± 1.3 nm
were determined, whereas for the GO/M, the mode values of size ranged from 72.8 to
194 nm. The results of XRD and FTIR showed the respective characteristic diffraction
and absorption peaks only for graphene oxide, magnetite and GO/M(20%). It was not
observed characteristic peaks for the other samples of graphene oxide that have
higher loads of magnetite incorporated.
TOMINAGA, F.K.; SAKATA, S.K.; SOARES, J.J.S.; JACOVONE, R.M.S.
Synthesis and characterization of magnetic graphene oxide nanocomposites.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4680-4680.
Disponível em: http://repositorio.ipen.br/handle/123456789/29553. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
JACOVONE, R.M.S.
; SOARES, J.J.S.
; SAKATA, S.K.
.
Synthesis and characterization of graphene oxide/nickel nanoparticles using nanoparticle tracking analysis.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4682-4682.
Abstract:
One of the graphene based compounds that has giving attention is graphene oxide
(GO). This nanomaterial has oxygenated groups on its surface, which provide
hydrophilicity and allow its exfoliation in several polar solvents. Moreover, these
reactive sites can be further functionalized, yielding nanocomposites with many
applications in electrochemistry and biomaterials fields. The objective of this study is
to synthesize nickel / graphene oxide (GO-Ni) nanocomposite using electron beam in
water /alcohol solution without stabilizers and to characterize GO and GO-Ni by
Nanoparticle Tracking Analysis (NTA). The Nanoparticle Tracking Analysis utilizes the
properties of both light scattering and Brownian motion in order to obtain the particle
size distribution and to measure the diffusion coefficient. From the Stokes-Einstein
equation it was possible to obtain the hydrodynamic diameter of the nanomaterials.
The NTA result showed that GO and GO-Ni showed respectively 47 nm and 55nm.
Both showed a low polydispersity index, indicating the homogeneity of the size
distribution and the formation of a monodisperse system. The results showed that it is
possible to obtain nanoparticles of graphene oxide incorporated with nickels smaller
than 60 nm and with good distribution without the use of stabilizers.
JACOVONE, R.M.S.; SOARES, J.J.S.; SAKATA, S.K.
Synthesis and characterization of graphene oxide/nickel nanoparticles using nanoparticle tracking analysis.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4682-4682.
Disponível em: http://repositorio.ipen.br/handle/123456789/29554. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
FERREIRA, J.C.
; CAVALLARI, R.V.
; LIMA, N.B.
; RODRIGUES, T.S.
; BERGAMASCHI, V.S.
; SILVA, F.A. e
.
Synthesis and characterization of catalysts based on nickel, cerium, and lanthanum supported on biocarbon for ethanol steam reforming.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 3559-3559.
Abstract:
Ethanol steam reforming (ESR) is considered asa promising alternative for hydrogen
production due to some differentadvantages that include the large availability, relatively
low cost, andsuperior reactivity of ethanol as compared to other compounds. Thus,
thistechnology is also considered more sustainable and greener as compared to
othermethods usually employed for hydrogen production. However, the
currentindustrial catalysts suffer from strong deactivation because the extensivecarbon
deposition, which limits their performances and utilization. In order toovercome this
limitation, we report herein the synthesis of a catalyst based onnickel, cerium and
lanthanum supported on activated biocarbon by a microwaveassisted hydrothermal
method. In this method, we first performed a hydrothermalactivation of the biocarbon
support at 120 °C using nitric acid (0.3 M) in areactor coupled to a microwave source
aiming the formation of acid groups atthe surface of our carbonaceous matrix. In a next
step, the adsorption of La3+,Ce3+, and Ni3+ onto the activated biocarbon was
performed by the addition ofLa(NO3)3.6H2O, Ce(NO3)3.6H2O, and Ni(NO3)3.6H2O
in the suspension containingthe activated biocarbon and potassium thiosulfate for
stabilization (pH 8.0) at75 °C. The obtained catalyst was then characterized by
scanning electronmicroscopy, X-ray dispersive spectroscopy, X-ray diffraction,
temperatureprogramed reduction, and surface area by the BET method. After this step,
the catalystwas then evaluated towards the ESR, in which 100 % of ethanol conversion
wasobserved with the formation of only H2 (~ 60%) and CO2 (ESR products) and
COand CH4 as byproducts (both in low concentrations), indicating a goodselectivity
for ESR. Good stability was also achieved with no significant lossof activity even after
24 hours of reaction at 550 °C. The reactants and thereaction products were analyzed
by gas chromatograph (Agilent 7890A), equippedwith a thermal conductivity detector
(TCD) and a flame ionization detector(FID) connected in series.
FERREIRA, J.C.; CAVALLARI, R.V.; LIMA, N.B.; RODRIGUES, T.S.; BERGAMASCHI, V.S.; SILVA, F.A. e.
Synthesis and characterization of catalysts based on nickel, cerium, and lanthanum supported on biocarbon for ethanol steam reforming.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 3559-3559.
Disponível em: http://repositorio.ipen.br/handle/123456789/29638. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
FERREIRA, J.C.
; CAVALLARI, R.V.
; SILVA, F.A. e
; RODRIGUES, T.S.
; BERGAMASCHI, V.S.
.
Synthesis and characterization of catalysts based on nickel, cerium, and lanthanum supported on biocarbon for ethanol steam reforming.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 6970-6970.
Abstract:
Ethanol steam reforming (ESR) is considered asa promising alternative for hydrogen
production due to some differentadvantages that include the large availability, relatively
low cost, andsuperior reactivity of ethanol as compared to other compounds. Thus,
thistechnology is also considered more sustainable and greener as compared to
othermethods usually employed for hydrogen production. However, the
currentindustrial catalysts suffer from strong deactivation because the extensivecarbon
deposition, which limits their performances and utilization. In order toovercome this
limitation, we report herein the synthesis of a catalyst based onnickel, cerium and
lanthanum supported on activated biocarbon by a microwaveassisted hydrothermal
method. In this method, we first performed a hydrothermalactivation of the biocarbon
support at 120 °C using nitric acid (0.3 M) in areactor coupled to a microwave source
aiming the formation of acid groups atthe surface of our carbonaceous matrix. In a next
step, the adsorption of La3+,Ce3+, and Ni3+ onto the activated biocarbon was
performed by the addition ofLa(NO3)3.6H2O, Ce(NO3)3.6H2O, and Ni(NO3)3.6H2O
in the suspension containingthe activated biocarbon and potassium thiosulfate for
stabilization (pH 8.0) at75 °C. The obtained catalyst was then characterized by
scanning electronmicroscopy, X-ray dispersive spectroscopy, X-ray diffraction,
temperatureprogramed reduction, and surface area by the BET method. After this step,
the catalystwas then evaluated towards the ESR, in which 100 % of ethanol conversion
wasobserved with the formation of only H2 (~ 60%) and CO2 (ESR products) and
COand CH4 as byproducts (both in low concentrations), indicating a goodselectivity
for ESR. Good stability was also achieved with no significant lossof activity even after
24 hours of reaction at 550 °C. The reactants and thereaction products were analyzed
by gas chromatograph (Agilent 7890A), equippedwith a thermal conductivity detector
(TCD) and a flame ionization detector(FID) connected in series.
FERREIRA, J.C.; CAVALLARI, R.V.; SILVA, F.A. e; RODRIGUES, T.S.; BERGAMASCHI, V.S.
Synthesis and characterization of catalysts based on nickel, cerium, and lanthanum supported on biocarbon for ethanol steam reforming.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 6970-6970.
Disponível em: http://repositorio.ipen.br/handle/123456789/29619. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
EL HAJJ, T.M.; SILVA, P.S.C.
; GANDOLLA, M.P.A.; DELBONI JUNIOR, H..
Surface treatments on ornamental rock plates to reduce radon and thoron exhalation rates.
In: ENA WORKSHOP, 1st; EANNORM WORKSHOP, 9th,
November 19-22, 2018,
Katowice, Poland.
Abstract...
2018.
EL HAJJ, T.M.; SILVA, P.S.C.; GANDOLLA, M.P.A.; DELBONI JUNIOR, H.
Surface treatments on ornamental rock plates to reduce radon and thoron exhalation rates.
In:
ENA WORKSHOP, 1st; EANNORM WORKSHOP, 9th,
November 19-22, 2018,
Katowice, Poland.
Abstract...
2018.
Disponível em: http://repositorio.ipen.br/handle/123456789/30202. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
HADDAD, PAULA; SAULO, VICTOR T.; RIBEIRO, MARTHA S.
; PEREIRA, SAULO T.
; YOSHIMURA, TANIA M.
.
Superparamagnetic iron oxide nanoparticles covered with methylene blue for antimicrobial photodynamic therapy.
In: INTERNATIONAL MATERIALS RESEARCH CONGRESS, 27th,
August 19-24, 2018,
Cancún, México.
Abstract...
2018.
HADDAD, PAULA; SAULO, VICTOR T.; RIBEIRO, MARTHA S.; PEREIRA, SAULO T.; YOSHIMURA, TANIA M.
Superparamagnetic iron oxide nanoparticles covered with methylene blue for antimicrobial photodynamic therapy.
In:
INTERNATIONAL MATERIALS RESEARCH CONGRESS, 27th,
August 19-24, 2018,
Cancún, México.
Abstract...
2018.
Disponível em: http://repositorio.ipen.br/handle/123456789/29721. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
GASPARIAN, P.B.R.
; YOSHIMURA, E.M.; UMISEDO, N.K.; CAMPOS, L.L.
; MALTHEZ, A.L.M.C..
Study of the dosimetric properties of CaSO4:Dy using OSL technique.
In: RUBIO, MARCELO (Ed.); TIRAO, GERMAN (Ed.) INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 14th,
October 7-11, 2018,
Córdoba, Argentina.
Abstract...
Córdoba: Centro de Excelencia en Productos y Procesos,
2018.
p. 326-326.
GASPARIAN, P.B.R.; YOSHIMURA, E.M.; UMISEDO, N.K.; CAMPOS, L.L.; MALTHEZ, A.L.M.C.
Study of the dosimetric properties of CaSO4:Dy using OSL technique.
In:
RUBIO, MARCELO (ed.); TIRAO, GERMAN (ed.) INTERNATIONAL SYMPOSIUM ON RADIATION PHYSICS, 14th,
October 7-11, 2018,
Córdoba, Argentina.
Abstract...
Córdoba: Centro de Excelencia en Productos y Procesos,
2018.
p. 326-326.
Disponível em: http://repositorio.ipen.br/handle/123456789/30257. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
MARCELO, L.A.
; LARA, J.A.C.; ROSSI, J.L.
; COLOSIO, M.A.; OLIVEIRA, B.G.
; MUCSI, C.S.
.
Study of patchweld blank Resistance Spot Welding (RSW) before hot stamping with and without heat treatment parameters.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4805-4805.
Abstract:
The global legislators have passed more severe vehicle emissions and safety
regulations through 2020. In order to solve this equation, the advanced high strength
steels (AHSS) grades are qualified to meet the functional performance demands of
certain parts. For structural elements, AHSS steels are excellent in the crash zones of
the vehicle for their high energy absorption. For structural elements of the passenger
compartment, extremely high-strength steels the boron-based Press Hardened Steels
(PHS) become one of the most popular materials to improved safety performance. The
AHSS permit design body structures with a thinner material in specific areas to achieve
the project requirements, due to the high strength and combined with inner
reinforcement, too. Recently, the engineers decided to produce parts and
reinforcement at the same time during forming called “patchweld” and the PHS steel
was specified for the purpose. However, the blanks have to keep together during the
hot stamping process and Resistance spot welding (RSW) as a most common welding
process for joining sheet steels in the car-body production was the obvious chose. The
designed microstructure of the AHSS can be destroyed with the welding thermal cycle,
which can affect failure behavior and mechanical properties of the welded structure. It
has been recognized that the RSW parameters selection played an important role in
the AHSS welding performance. This paper aims to understand the tempering process
performed during the RSW cycle with two different welding parameters, known as P4
and P5. The P4 and P5 welding parameters were defined to reach the maximum load
during the shear test while full bottom detachment according to AWS D8.9.The test
samples were assembled with a gap to reproduce real vehicle welding conditions. The
parameter P4 weld PHS sheet samples without heat treatment and without the use of
tempering during the passage of current, whereas the parameter P5, weld equal
samples, but with tempering during the resistance welding process. The influence of
these parameters on the PHS “patchweld” mechanical properties was evaluated with
Vickers hardness test (HV) through the cross-section of the specimen with standard
metallographic technique preparation and shear tests. The results confirmed the
difference at the Heat affected zone (HAZ) mechanical strength over fusion zone (ZF).
For the two welding parameters, it was possible to visualize a softening region in the
HAZ of the welding parameter P4. The welding parameter P5 with a tempering pattern
at the weld obtained superior results in the Heat affected zone due to the reduction of
the cooling speed caused by a process performed during the RSW cycle.
MARCELO, L.A.; LARA, J.A.C.; ROSSI, J.L.; COLOSIO, M.A.; OLIVEIRA, B.G.; MUCSI, C.S.
Study of patchweld blank Resistance Spot Welding (RSW) before hot stamping with and without heat treatment parameters.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 4805-4805.
Disponível em: http://repositorio.ipen.br/handle/123456789/29555. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
-
CIONE, F.C.
; ROSSI, J.L.
; SOUZA, A.C..
Study for the obtainment of the W-Cu-Ni system composite applying powder metalurgy for use as a radiation shielding material for gamma ray attenuation.
In: CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 2878-2878.
Abstract:
The metallic composite material of the tungsten-copper-nickel system (W-Cu-Ni)
produced by powder metallurgy (P/M) presented has adequade characteristics to be
an alternative material for gamma (?) radiation attenuation. Lead and depleted uranium
are the materials commonly used for radiation atenuattion. They are materials with
certain toxicity and aggressiveness to the environment. The W-Cu-Ni composites are
non-toxic and do not present environmental risks. The tungsten, matrix metal of the
composite, has as property its atomic density that is directly proportional to the
electrons of its atoms important for the purpose of effects of radiation attenuation. For
the preparation of the composite samples, the size of the metallic particles was
determined and selected. In order to homogenize the metallic particle distribution and
to reduce the average particle size, a ball mill was used for 12, 24 and 36 hours. After
grinding, the particle size analysis presented the mean particle size of 12 ?m was
observed. After the sintering step, in the micro-hardness tests an average of 303.3 HV
was achieved for the composition W6Cu1Ni. To measure the absorption of radiation in
the samples the classical scientific method of narrow beam geometry (NBG)
experiments was employed. The gamma radiation source of cobalt-60 was selected to
study the effects and adjustments on the values of the Half-Value Layer and (HLV) in
the dimensions of the required shielding thickness. For unpublished composite sample
W6Cu1Ni the HLV method indicated the necessity of 9.27 mm of thickness in the
obtained density of 13.38 g.cm-3, superior to the density of lead (11,34 g.cm-3). As a
comparative, database from the XCOM (NIST) were used and demostrating
convergence between the simulated values of 9.15 mm and the experimental values
obtained.
CIONE, F.C.; ROSSI, J.L.; SOUZA, A.C.
Study for the obtainment of the W-Cu-Ni system composite applying powder metalurgy for use as a radiation shielding material for gamma ray attenuation.
In:
CONGRESSO BRASILEIRO DE ENGENHARIA E CIÊNCIA DOS MATERIAIS, 23.,
04-08 de novembro, 2018,
Foz do Iguaçu, PR.
Resumo...
2018.
p. 2878-2878.
Disponível em: http://repositorio.ipen.br/handle/123456789/29625. Acesso em: $DATA.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.
Como referenciar este item
Buscar no repositório
Navegar
-
Todo o repositório
-
Esta coleção
Minha conta
Visualizar
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.