RSS 1.0Artigos - Física e Química - FEG
Navegar por
Submissões recentes
-
Uniform surface modification of polyethylene terephthalate (PET) by atmospheric pressure plasma jet with a horn-like nozzle
Mui, Taiana She Mir
; Mota, Rogério Pinto ; ; Hein, Luis Rogério de Oliveira ; Kostov, Konstantin Georgiev (Surface and Coatings Technology, 2018) [Artigo]
This work reports on surface modification of polyethylene terephthalate (PET) polymer by an atmospheric pressure plasma jet (APPJ) operated with argon. A distinguishable feature of this device is that it terminates with a ... -
Lorentz Violation and Topologically Trapped Fermions in 2+1 Dimensions
; ; de Souza Dutra, Alvaro; (Annalen der Physik, 2018) [Artigo]
The full spectrum of two-dimensional fermion states in a scalar soliton trap with a Lorentz breaking background is investigated in the context of graphene, where the Lorentz symmetry should not be strictly valid. The field ... -
A Comparative Study of Hydrogen-Induced Cracking Resistances of API 5L B and X52MS Carbon Steels
Figueredo, Rodrigo Monzon; De Oliveira, Mariana Cristina ; De Paula, Leandro Jesus ; Acciari, Heloisa Andréa ; Codaro, Eduardo Norberto (International Journal of Corrosion, 2018) [Artigo]
Susceptibility to hydrogen-induced cracking of API 5L B and X52MS low-carbon steels in NACE 177-A, 177-B, and 284-B solutions has been investigated by the present work. A metallographic analysis of these steels was performed ... -
Refinements of the Weyl Pure Geometrical Thick Branes From Information-Entropic Measure
Correa, Rafael Augusto Couceiro; ; ; de Souza Dutra, Alvaro ; (Annalen der Physik, 2018) [Artigo]
This work aims to analyse the so-called configurational entropy in the Weyl pure geometrical thick brane model. The Weyl structure plays a prominent role in the brane thickness of this model. We find a set of parameters ... -
Cold atmospheric pressure plasma jet modulates Candida albicans virulence traits
Chiodi Borges, Aline; Castaldelli Nishime, Thalita Mayumi ; Kostov, Konstantin Georgiev ; de Morais Gouvêa Lima, Gabriela ; Vidal Lacerda Gontijo, Aline ; Nóbrega Martins Marchesotti de Carvalho, Juliana ; Yzumi Honda, Roberto ; Koga-Ito, Cristiane Yumi (Clinical Plasma Medicine, 2017) [Artigo]
The occurrence of Candida-related infections depends on the interplay between fungal virulence factors and host's immune system. For this reason, interfering with fungal virulence is a promising approach to prevent or treat ... -
Corrosion resistance after mechanical deformation of the Ti30Ta experimental alloy for using in biomedical applications
Da Silva, Kerolene Barboza; Konatu, Reginaldo Toshihiro ; De Oliveira, Liliane Lelis ; Nakazato, Roberto Zenhei ; Claro, Ana Paula Rosifini Alves (Materials Research, 2017) [Artigo]
In this study the corrosion resistance of Ti30Ta experimental alloy was evaluated when submitted to different deformation rates. Alloys were processed in arc melting, furnace, forged and treated. The samples were machined ... -
Synthesis, characterization and thermal behavior of some trivalent lanthanide 4-amino-benzenesulfonate salts
Matias, Fabrício Rossi Marques; da Silva, Vivian Martins F. ; Nunes, Ronaldo Spezia ; Luiz, José Marques (Journal of Thermal Analysis and Calorimetry, 2017) [Artigo]
The lanthanide 4-amino-benzenesulfonate salts (or sulfanilates) were obtained by the reaction of lanthanide carbonates (La3+, Ce3+, Pr3+, Nd3+, Sm3+, Eu3+ and Gd3+) and 4-amino-benzenesulfonic (or sulfanilic) acid in aqueous ... -
Analysis of surface and profile of pits in austenitic stainless steel AISI 310S by optical microscopy
; ; de Oliveira Hein, Luis Rogerio; Codaro, Eduardo Norberto ; (Materials Science Forum, 2014) [Trabalho apresentado em evento]
Pit morphology on sensitized 310S stainless steel has been studied using an image processing method based on reflected light microscopy (profile and surface). Salt Spray test has been used to induce the pitting corrosion. ... -
Soldering spin-3/2 fermions in D = 2 + 1
Mendonça, E. L.; Lima, D. S. ; dos Santos, A. L.R. (Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2018) [Artigo]
The soldering procedure has been for the first time generalized to the case of spin-3/2 fermionic theories. We have demonstrated that the fermionic part of the so-called “New Topologically Massive Supergravity” theory, ... -
The point-charge self-energy in a nonminimal Lorentz-violating Maxwell electrodynamics
Borges, L. H.C.; ; (EPL, 2018) [Artigo]
In this letter we study the self-energy of a point-like charge for the electromagnetic field in a non-minimal Lorentz symmetry breaking scenario in a (n + 1)-dimensional space time. We consider two variations of a model ... -
Amplitude-modulated cold atmospheric pressure plasma jet for treatment of oral candidiasis: In vivo study
Borges, Aline Chiodi; de Morais Gouvêa Lima, Gabriela ; Mayumi Castaldelli Nishime, Thalita ; Vidal Lacerda Gontijo, Aline ; Kostov, Konstantin Georgiev ; Koga-Ito, Cristiane Yumi (PLoS ONE, 2018) [Artigo]
The aim of this study was to establish an effective and safe protocol for in vivo oral candidiasis treatment with atmospheric plasma jets. A novel amplitude-modulated cold atmospheric pressure plasma jet (AM-CAPPJ) device, ... -
Model independent constraints on transition redshift
Jesus, J. F.; ; Pereira, S. H. (Journal of Cosmology and Astroparticle Physics, 2018) [Artigo]
This paper aims to put constraints on the transition redshift zt, which determines the onset of cosmic acceleration, in cosmological-model independent frameworks. In order to perform our analyses, we consider a flat universe ... -
Synthesis of orthorhombic Sb2O3 branched rods by a vapor–solid approach
Gonçalves, Rosana Alves; ; ; Berengue, Olivia Maria (Nano-Structures and Nano-Objects, 2018) [Artigo]
In this work, Sb2O3 nanorods, microrods and crystals were synthesized by a carbothermal reduction driven vapor–solid(VS) process. Aiming to provide data on the structure of these samples XRD, FEG-SEM and Raman spectroscopy ... -
Bayesian correction of H(z) data uncertainties
Jesus, J. F.; Gregório, T. M. ; Andrade-Oliveira, F. ; ; Matos, C. A.O. (Monthly Notices of the Royal Astronomical Society, 2018) [Artigo]
We compile 41 H(z) data from literature and use them to constrain OΛCDM and flat ΛCDM parameters. We show that the available H(z) suffers from uncertainties overestimation and propose a Bayesian method to reduce them. As ... -
Non-standard Dirac adjoint spinor: The emergence of a new dual
Bueno Rogerio, R. J.; (EPL, 2018) [Artigo]
In this present communication we provide a new derivation of the Dirac dual structure by employing a different approach from the originally proposed one. Following a general and rigorous mathematical process to compute the ... -
Effective lagrangian for a mass dimension one fermionic field in curved spacetime
Bueno Rogerio, R. J.; Hoff da Silva, J. M. ; ; Pereira, S. H. (Journal of High Energy Physics, 2018) [Artigo]
In this work we use momentum-space techniques to evaluate the propagator G(x, x′) for a spin 1/2 mass dimension one spinor field on a curved Friedmann-Robertson-Walker spacetime. As a consequence, we built the one-loop ... -
Evolution of the universe driven by a mass-dimension-one fermion field
Pereira, S. H.; ; Souza, A. Pinho S. (EPL, 2017) [Artigo]
This paper studies the evolution of the universe filled with a neutral mass-dimension-one fermionic field, sometimes called Elko. The numerical analysis of the coupled system of equations furnishes a scale factor growth ... -
Direct evidence of traps controlling the carriers transport in SnO2 nanobelts
Berengue, Olivia M.; (Journal of Semiconductors, 2017) [Artigo]
This work reports on direct evidence of localized states in undoped SnO2 nanobelts. Effects of disorder and electron localization were observed in Schottky barrier dependence on the temperature and in thermally stimulated ... -
Constraints on a possible evolution of mass density power-law index in strong gravitational lensing from cosmological data
; Pereira, S. H.; (Monthly Notices of the Royal Astronomical Society, 2017) [Artigo]
In this work, by using strong gravitational lensing (SGL) observations along with Type Ia Supernovae (Union2.1) and gamma-ray burst data (GRBs), we propose a new method to study a possible redshift evolution of γ(z), the ... -
Increasing students' skills in Operations managemen classes: Cumbuca Method as teaching-learning strategy
Junior, Jorge Muniz; De Souza Rodrigues, José ; Assis, Alice ; ; Franco, Bruno Chaves ; MaCiel, Fabricio Gomes (Gestao e Producao, 2017) [Artigo]
This paper analyses the use of the Cumbuca Method as a teaching strategy to develop reading skills in engineering students. Despite their importance, reading skills are little stimulated in engineering undergraduate courses. ...