Search Results - "Freire, Paulo T C"

Raman evidence for pressure-induced formation of diamondene by Martins, Luiz Gustavo Pimenta, Matos, Matheus J. S., Paschoal, Alexandre R., Freire, Paulo T. C., Andrade, Nadia F., Aguiar, Acrísio L., Kong, Jing, Neves, Bernardo R. A., de Oliveira, Alan B., Mazzoni, Mário S.C., Filho, Antonio G. Souza, Cançado, Luiz Gustavo

“…Despite the advanced stage of diamond thin-film technology, with applications ranging from superconductivity to biosensing, the realization of a stable and…”
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Hydrogen bonds in crystalline d-alanine: diffraction and spectroscopic evidence for differences between enantiomers by Belo, Ezequiel A, Pereira, Jose E M, Freire, Paulo T C, Argyriou, Dimitri N, Eckert, Juergen, Bordallo, Heloisa N

“…Enantiomeric amino acids have specific physiological functions in complex biological systems. Systematic studies focusing on the solid-state properties of…”
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Response to comment on 'Hydrogen bonds in crystalline d-alanine: diffraction and spectroscopic evidence for differences between enantiomers' by Belo, Ezequiel A, Pereira, Jose E M, Freire, Paulo T C, Argyriou, Dimitri N, Eckert, Juergen, Bordallo, Heloisa N

“…A response is given to comments by Bürgi & Macchi [ (2018), , 654-657] about Belo [ (2018), , 6-12.]…”
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Structure-property relations in crystalline L-leucine obtained from calorimetry, X-rays, neutron and Raman scattering by Façanha Filho, Pedro F, Jiao, Xueshe, Freire, Paulo T C, Lima, Jr, José A, dos Santos, Adenilson O, Henry, Paul F, Yokaichiya, Fabiano, Kremner, Ewout, Bordallo, Heloisa N

“…We have studied the amino acid L-leucine (LEU) using inelastic neutron scattering, X-rays and neutron diffraction, calorimetry and Raman scattering as a…”
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Large-Field Electron Imaging and X‑ray Elemental Mapping Unveil the Morphology, Structure, and Fractal Features of a Cretaceous Fossil at the Centimeter Scale by Oliveira, Naiara C., Silva, João H., Barros, Olga A., Pinheiro, Allysson P., Santana, William, Saraiva, Antônio A. F., Ferreira, Odair P., Freire, Paulo T. C., Paula, Amauri J.

“…We used here a scanning electron microscopy approach that detected backscattered electrons (BSEs) and X-rays (from ionization processes) along a large-field…”
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Vibrational spectroscopy and X-ray diffraction applied to the study of Cretaceous fish fossils from Araripe Basin, Northeast of Brazil by Freire, Paulo T. C., Silva, João H., Sousa-Filho, F. E., Abagaro, Bruno T. O., Viana, Bartolomeu C., Saraiva, Gilberto D., Batista, Thatiany A., Barros, Olga A., Saraiva, Antonio A. F.

“…In this work, we investigate fossils of the fish coelacanth belonging to the Cretaceous Period from two different formations belonging to Araripe Basin (Brejo…”
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Raman and Neutron Scattering Study of Partially Deuterated L-Alanine: Evidence of a Solid-Solid Phase Transition by de Souza, Joelma M., Freire, Paulo T. C., Argyriou, Dimitri N., Stride, John A., Barthès, Mariette, Kalceff, Walter, Bordallo, Heloisa N.

“…Raman and neutron experiments using specific isotope labeling were combined in order to study the dynamics and structure of L‐alanine. Inelastic neutron and…”
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Phase-transition of hydrophobic dipeptide l-phenylalanyl-l-alanine under high pressure via Raman spectroscopy by Cordeiro, Adrya J.P., Alves, Kelly C., Mota, Elder A.V., Vasconcelos, Daniel L.M., Lima, Raphaela A., da Silva, José A.S., Freire, Paulo T.C.

“…[Display omitted] •Dipeptide with tubular structure.•Hydrophobic dipeptide material under high pressure.•Raman Spectroscopy of Phe-Ala…”
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High pressure Raman spectra and DFT calculation of glyphosate by Holanda, Rocicler O., da Silva, Cristiano B., Vasconcelos, Daniel L.M., Freire, Paulo T.C.

“…Glyphosate, N-(phosphonomethyl)glycine, (C3H8NO5P), was obtained through the method of slow evaporation method from aqueous solution and its structure analyzed…”
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Physicochemical properties calculated using DFT method and changes of 5-methyluridine hemihydrate crystals at high temperatures by Carvalho, Jhonatam O., Oliveira Neto, João G., Silva Filho, José G., de Sousa, Francisco F., Freire, Paulo T.C., Santos, Adenilson O., Façanha Filho, Pedro F.

“…[Display omitted] •5-methyluridine hemihydrate (5 mU) crystals were obtained by slow evaporation method.•Properties and vibrational spectra calculated by DFT…”
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Elucidating the phase transitions of decanoic-acid crystal by XRD, Raman, group theory and Gibbs energy analyses combined with DFT calculations by P. Gurgel, Walldiney, Correa, Adriano, C. Santos, Clenilton, O. Santos, Adenilson, D. Saraiva, Gilberto, T.C. Freire, Paulo, E.S. Nogueira, Carlos, G.C. Moreira, Sanclayton, F. de Sousa, Francisco

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Low-Temperature Phase Transition of Dodecanoic Acid Crystals: A Study Using Raman, Powder X‑ray Diffraction, and Density Functional Theory Calculations by Santos Souza, Gislayllson D, Amado, Ana M, Teixeira, Alexandre M. R, Freire, Paulo T. C, Saraiva, Gilberto D, Pinheiro, Gardênia S, Moreira, Sanclayton G. C, de Sousa, Francisco F, Nogueira, Carlos E. S

“…Dodecanoid acid, also known as lauric acid, is a molecular alloy phase change material, and as such, knowledge about its behavior under different temperatures…”
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Pressure-induced phase transition and fracture in α-MoO3 nanoribbons by Silveira, Jose V., Vieira, Luciana L., Aguiar, Acrisio L., Freire, Paulo T.C., Mendes Filho, Josue, Alves, Oswaldo L., Souza Filho, Antonio G.

“…MoO3 nanoribbons were studied under different pressure conditions ranging from 0 to 21GPa at room temperature. The effect of the applied pressure on the…”
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Raman studies of nanocomposites catalysts: temperature and pressure effects of CeAl, CeMn and NiAl oxides by da Silva, Antonio N., Neto, Antonio B.S., Oliveira, Alcemira C., Junior, Manoel C., Junior, Jose A.L., Freire, Paulo T.C., Filho, Josué M., Oliveira, Alcineia C., Lang, Rossano

“…High temperature and pressure effects on the physicochemical properties of binary oxides catalysts were investigated. The nanocomposites catalysts comprising…”
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Temperature and high pressure effects on the structural features of catalytic nanocomposites oxides by Raman spectroscopy by da Silva, Antonio N., Pinto, Raffael C.F., Freire, Paulo T.C., Junior, Jose Alves L., Oliveira, Alcineia C., Filho, Josué M.

“…[Display omitted] •Effect of temperature and pressure on nanostructured oxides by Raman spectroscopy.•Phase transitions accelerated sintering of ZrO2 and CeO2…”
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Spectroscopic analysis and X-ray diffraction of trunk fossils from the Parnaíba Basin, Northeast Brazil by Alencar, Wemerson J., Santos, F. Eroni P., Cisneros, Juan C., da Silva, João H., Freire, Paulo T.C., Viana, Bartolomeu C.

“…[Display omitted] •Brazilian trunk fossils were studied by analytical techniques.•The main crystalline phases of the fossils were identified.•The main…”
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Molecular flexibility and structural instabilities in crystalline l-methionine by Fischer, Jennifer, Lima, José A., Freire, Paulo T.C., Melo, Francisco E.A., Havenith, Remco W.A., Filho, Josué Mendes, Broer, Ria, Eckert, Juergen, Bordallo, Heloisa N.

“…We have investigated the dynamics in polycrystalline samples of l-methionine related to the structural transition at about 307K by incoherent inelastic and…”
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Structural Isotopic Effects in the Smallest Chiral Amino Acid:  Observation of a Structural Phase Transition in Fully Deuterated Alanine by de Souza, Joelma M, Freire, Bordallo, Heloisa N, Argyriou, Dimitri N

“…A first study of possible changes instigated by deuteration in amino acids was carried out using neutron diffraction, inelastic neutron scattering, and Raman…”
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Use of coconut bagasse as alternative adsorbent for separation of copper(II) ions from aqueous solutions: Isotherms, kinetics, and thermodynamic studies by Neto, Vicente O. Sousa, Oliveira, André G., Teixeira, Raimundo N. P., Silva, Marcos A. A., Freire, Paulo T. C., Keukeleire, Denis D., Nascimento, Ronaldo F.

“…The use of coconut bagasse as an adsorbent for the treatment of Cu(II) ions from aqueous solutions has been investigated. The adsorbent was characterized by…”
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Using Raman spectroscopy to understand the origin of the phase transition observed in the crystalline sulfur based amino acid l-methionine by Lima, José A., Freire, Paulo T.C., Melo, Francisco E.A., Filho, J. Mendes, Fischer, Jennifer, Havenith, Remco W.A., Broer, Ria, Bordallo, Heloisa N.

“…We present the Raman spectra of l-methionine (C5H11NO2S) monocrystals obtained in the spectral region ranging from 3200 to 50cm−1 at temperatures from 20 to…”
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