Search Results - "Paixão, J A"

The axion-photon mixing in non-linear electrodynamic scenarios by Paixão, J. M. A., Ospedal, L. P. R., Neves, M. J., Helayël-Neto, J. A.

“…A bstract In this contribution, we re-assess some aspects of axionic electrodynamics by coupling non-linear electromagnetic effects to axion physics. We…”
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Probing the interference between non-linear, axionic and space-time-anisotropy effects in the QED vacuum by Paixão, J. M. A., Ospedal, L. P. R., Neves, M. J., Helayël-Neto, J. A.

“…A bstract In this paper, we pursue the investigation of a generic non-linear extension of axionic electrodynamics in a Carroll-Field-Jackiw (CFJ) scenario that…”
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Unveiling the Red and Brownish-Green Polymorphs of a Novel ROY Derivative: 2‑(4-((3-Cyanothiophen-2-yl)amino)-3-nitrophenyl)Acetic Acid by Nogueira, Bernardo A., Lopes, Susana M. M., Rodrigues, Ana Clara B., Eusébio, M. Ermelinda S., André, Vânia, Duarte, Teresa, Paixão, J. A., Pinho e Melo, Teresa M. V. D., Fausto, Rui

“…Polymorphism has been the subject of many studies in the last decades, including a particular type of polymorphism where the colors exhibited by the polymorphs…”
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Conformational Landscape and Polymorphism in 5‑Acetic Acid Hydantoin by Nogueira, B. A, Ildiz, G. O, Canotilho, J, Eusébio, M. E. S, Henriques, M. S. C, Paixão, J. A, Fausto, R

“…The conformational space of 5-acetic acid hydantoin {5AAH; [2-(2,5-dioxoimidazolidin-4-yl)­acetic acid]} was investigated by quantum chemical calculations…”
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5‑Methylhydantoin: From Isolated Molecules in a Low-Temperature Argon Matrix to Solid State Polymorphs Characterization by Nogueira, B. A, Ildiz, G. O, Canotilho, J, Eusébio, M. E. S, Henriques, M. S. C, Paixão, J. A, Fausto, R

“…The molecular structure, vibrational spectra and photochemistry of 5-methylhydantoin (C4H6N2O2; 5-MH) were studied by matrix isolation infrared spectroscopy…”
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Antiferromagnetic–weak ferromagnetic transition in lightly doped BiFeO3: role of structural defects by Khomchenko, V. A, Paixão, J. A

“…Chemical substitution is commonly considered as favoring the suppression of the cycloidal magnetic structure specific to the polar phase of multiferroic…”
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Structure and Photochemistry of a Saccharyl Thiotetrazole by Ismael, A, Borba, A, Henriques, M. S. C, Paixão, J. A, Fausto, R, Cristiano, M. L. S

“…The molecular structure and photochemistry of 5-thiosaccharyl-1-methyltetrazole (TSMT) were studied by means of matrix-isolation FTIR spectroscopy, X-ray…”
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Large magnetization jumps in Ca-doped bismuth ferromanganite by Khomchenko, V.A., Das, M., Paixão, J.A., Silibin, M.V., Karpinsky, D.V.

“…Magnetic properties of the phase-separated (antiferromagnetic + glassy) Bi0·85Ca0·15Fe0·6Mn0·4O3 multiferroic have been studied over a wide temperature range…”
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Effect of combined Ca/Ti and Ca/Nb substitution on the crystal and magnetic structure of BiFeO3 by Khomchenko, V.A., Karpinsky, D.V., Ivanov, M.S., Franz, A., Dubkov, S.V., Silibin, M.V., Paixão, J.A.

“…[Display omitted] •Ca/Ti and Ca/Nb substitutions modify the antiferromagnetic structure of BiFeO3.•The cycloidal structure → canted structure transformation is…”
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Synthesis and magnetic studies of nanocrystalline Cu2OSeO3, a chiral topological magnet by Malta, J.F., Henriques, M.S.C., Paixão, J.A., Gonçalves, A.P.

“…Topological spin textures, such as magnetic skyrmions observed in certain chiral magnets, are one of the most interesting ordered phases in condensed matter. A…”
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Loop quantum gravity effects on electromagnetic properties of charged leptons by Melo, J. P. S., Neves, M. J., Paixão, J. M. A., Helayël-Neto, J. A.

“…The efforts in this contribution consist in reassessing a modified Dirac equation that incorporates a γ 0 γ 5 -Lorentz-symmetry violating (LSV) term induced as…”
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Structural and magnetic phase transitions in Ca-substituted bismuth ferromanganites by Khomchenko, V.A., Das, M., Paixão, J.A., Silibin, M.V., Karpinsky, D.V.

“…Single-phase samples of the Bi0.85Ca0.15Fe1−xMnxO3 (0.1 ≤ x ≤ 0.5) perovskites have been prepared by a solid state reaction method and investigated using X-ray…”
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Influence of temperature and fat content on ideal sucrose concentration, sweetening power, and sweetness equivalence of different sweeteners in chocolate milk beverage by Paixão, J A, Rodrigues, J B, Esmerino, E A, Cruz, A G, Bolini, H M A

“…The introduction of new products catering to specific dietary needs and the corresponding changes in the consumer profile reflect a growing demand for diet and…”
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Survival analysis: A consumer-friendly method to estimate the optimum sucrose level in probiotic petit suisse by Esmerino, E A, Paixão, J A, Cruz, A G, Garitta, L, Hough, G, Bolini, H M A

“…For years, just-about-right (JAR) scales have been among the most used techniques to obtain sensory information about consumer perception, but recently, some…”
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Impedance spectroscopy studies of ErNbO4 synthesised by the sol–gel method by Devesa, S., da Silva, P. S. P., Graça, M. P., Costa, L. C., Paixão, J. A.

“…In this work, we report the dielectric study of erbium niobate ceramic synthesised by the sol–gel method. X-ray diffraction patterns confirmed the presence of…”
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Mn substitution-induced revival of the ferroelectric antiferromagnetic phase in Bi1−x Ca x FeO3−x/2 multiferroics by Khomchenko, V. A., Pereira, L. C. J., Paixão, J. A.

“…Room-temperature X-ray diffraction, piezoresponse force microscopy, and SQUID magnetometry measurements of the Bi0.9Ca0.1Fe1−yMnyO3 (0 ≤ y ≤ 0.5)…”
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Electrical and magnetic characterization of Bi1 − xFexNbO4 ceramics by Devesa, S., da Silva, P. S. P., Graça, M. P., Valente, M., Costa, L. C., Paixão, J. A.

“…Bi 1 − x Fe x NbO 4 ( x  = 0.25, 0.50, and 0.75) samples were synthesized by the sol–gel method and its morphologic, structural, dielectric, and magnetic…”
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Chocolate Milk with Chia Oil: Ideal Sweetness, Sweeteners Equivalence, and Dynamic Sensory Evaluation Using a Time-Intensity Methodology by Rodrigues, J.B, Paixão, J.A., Cruz, A.G., Bolini, H.M.A.

“…The ideal sucrose concentration and equivalent concentrations of the stevia, sucralose, aspartame, and neotame in chocolate milk with chia oil as well as the…”
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Triple-q(-->) octupolar ordering in NpO2 by Paixão, J A, Detlefs, C, Longfield, M J, Caciuffo, R, Santini, P, Bernhoeft, N, Rebizant, J, Lander, G H

“…We report the results of resonant x-ray scattering experiments performed at the Np M(4,5) edges in NpO2. Below T(0)=25 K, the development of long-range order…”
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Effect of Nb doping on the morphology and multiferroic behavior of Bi0.9La0.1FeO3 ceramics by Khomchenko, V.A., Paixão, J.A.

“…Synthesis and study of the crystal structure, microstructure, local ferroelectric, and magnetic properties of the Bi0.9La0.1Fe1−xNbxO3+x (x≤0.02) perovskites…”
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