Search Results - "Melo, M.A.F."

Gelatin synthesis of CuFe2O4 and CuFeCrO4 ceramic pigments by Costa, A.F., Pimentel, P.M., Aquino, F.M., Melo, D.M.A., Melo, M.A.F., Santos, I.M.G

“…In the present study, CuFe2O4 and CuFeCrO4 spinels were synthesized using a method, which makes use of gelatin as an organic precursor in order to assess the…”
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Multi-elemental analysis of produced water by synchrotron radiation total reflection X-ray fluorescence by Pimentel, P.M., Anjos, M.J., Melo, D.M.A., Melo, M.A.F., Gonçalves, L.M., Silva, C.N., Lopes, R.T.

“…The synchrotron radiation total reflection X-ray fluorescence (SRTXRF) technique was used for the analysis of heavy metals in produced water samples from oil…”
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energetic characterization of pineapple crown leaves by Braga, R. M, Queiroga, T. S, Calixto, G. Q, Almeida, H. N, Melo, D. M. A, Melo, M. A. F, Freitas, J. C. O, Curbelo, F. D. S

“…Energetic characterization of biomass allows for assessing its energy potential for application in different conversion processes into energy. The objective of…”
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Characterization and thermal behavior of PrMO{sub 3} (M = Co or Ni) ceramic materials obtained from gelatin by Aquino, F.M., Melo, D.M.A., Pimentel, P.M., Braga, R.M., Melo, M.A.F., Martinelli, A.E., Costa, A.F.

“…Graphical abstract: The micrograph in figure shows sample calcined at temperature 900 °C. The sample exhibits morphology with considerable porosity and the…”
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Effect of lanthanum replacement by strontium in lanthanum nickelate crystals synthetized using gelatin as organic precursor by Oliveira, F.S., Pimentel, P.M., Oliveira, R.M.P.B., Melo, D.M.A., Melo, M.A.F.

“…La 1-xSr xNiO 3 (0 ≤ x ≤ 0.8) nanopowders were successfully synthesized using gelatin as a polymerization agent. Powders were calcined for 4 h at 700 and 900…”
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Characterization and thermal behavior of PrMO3 (M=Co or Ni) ceramic materials obtained from gelatin by Aquino, F.M., Melo, D.M.A., Pimentel, P.M., Braga, R.M., Melo, M.A.F., Martinelli, A.E., Costa, A.F.

“…The micrograph in figure shows sample calcined at temperature 900°C. The sample exhibits morphology with considerable porosity and the formation of…”
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Thermal decomposition kinetics of PrM[O.sub.3] ceramic materials via thermogravimetry by Aquino, F.M, Melo, D.M.A, Santiago, R.C, Melo, M.A.F, Martinelli, A.E, Freitas, J.C.O, Araujo, L.C.B

“…Thermogravimetric data using the non-isothermal kinetic models of Flynn and Wall and "Model-free Kinetics" were used to determine the activation energy to…”
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Kinetics and thermodynamics of Cu(II) adsorption on oil shale wastes by Pimentel, P.M., Melo, M.A.F., Melo, D.M.A., Assunção, A.L.C., Henrique, D.M., Silva, C.N., González, G.

“…The oil shale waste material, retorted shale, was utilized as an adsorbent for Cu(II) removal from aqueous solution. The kinetics and thermodynamic adsorption…”
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Evaluation of the zinox and zeolite materials as adsorbents to remove H2S from natural gas by MELO, D. M. A, DE SOUZA, J. R, MELO, M. A. F, MARTINELLI, A. E, CACHIMA, G. H. B, CUNHA, J. D

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Evaluation of CoAl2O4 as ceramic pigments by MELO, D. M. A, CUNHA, J. D, FERNANDES, J. D. G, BERNARDI, M. I, MELO, M. A. F, MARTINELLI, A. E

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Characterization of retorted shale for use in heavy metal removal by Pimentel, P.M., Oliveira, R.M.P.B., Melo, D.M.A., Anjos, M.J., Melo, M.A.F., González, G.

“…There has been a growing interest in the use of cost-effective materials to remove heavy metals from wastewater. In this study, retorted shale, a solid residue…”
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Thermal decomposition kinetics of PrMO3 (M = Ni or Co) ceramic materials via thermogravimetry by Aquino, F. M., Melo, D. M. A., Santiago, R. C., Melo, M. A. F., Martinelli, A. E., Freitas, J. C. O., Araújo, L. C. B.

“…Thermogravimetric data using the non-isothermal kinetic models of Flynn and Wall and “Model-free Kinetics” were used to determine the activation energy to…”
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Preparation and characterization of lanthanum palygorskite clays as acid catalysts by Araújo Melo, D.M, Ruiz, J.A.C, Melo, M.A.F, Sobrinho, E.V, Martinelli, A.E

“…Palygorskite clays containing 2, 4, 6 or 10% lanthanum (w/w) were prepared by ion-exchange from acid-leached natural clays. Samples were characterized by…”
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Evaluation of the zinox and zeolite materials as adsorbents to remove H 2S from natural gas by Melo, D.M.A., de Souza, J.R., Melo, M.A.F., Martinelli, A.E., Cachima, G.H.B., Cunha, J.D.

“…Mesoporous materials can be generally used as adsorbents to remove impurities from gases. During the past few years, H 2S has been removed from natural gas…”
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Ceramic pigment obtained by polymeric precursors by Cunha, J.D., Melo, D.M.A., Martinelli, A.E., Melo, M.A.F., Maia, I., Cunha, S.D.

“…Fe 2O 3 has been used as ceramic pigment due to excellent colorimetric characteristics combined with thermal stability. The introduction of La +3 to Fe 2O 3…”
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Preparation and characterization of terbium palygorskite clay as acid catalyst by Melo, D.M.Araújo, Ruiz, J.A.C, Melo, M.A.F, Sobrinho, E.V, Schmall, M

“…Palygorskite clays containing 5% and 10% terbium (W/W) were prepared by ion exchange from acid-leached natural clay. Samples were calcined at 523, 573, 623 and…”
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Evaluation of CoAl{sub 2}O{sub 4} as ceramic pigments by Melo, D.M.A., Cunha, J.D., Fernandes, J.D.G., Bernardi, M.I., Melo, M.A.F., Martinelli, A.E

“…CoAl{sub 2}O{sub 4} powder was obtained from a mixture of Co and Al oxalates at a ratio of 1:8 (Co:Al). The material was calcinated at different temperatures,…”
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Evaluation of CoAl 2O 4 as ceramic pigments by Melo, D.M.A., Cunha, J.D., Fernandes, J.D.G., Bernardi, M.I., Melo, M.A.F., Martinelli, A.E.

“…CoAl 2O 4 powder was obtained from a mixture of Co and Al oxalates at a ratio of 1:8 (Co:Al). The material was calcinated at different temperatures,…”
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Determination of relative acid strength of La/paligorskyte by n-butylamine by Melo, D.M.A., Ruiz, J.A.C., Sobrinho, E.V., Melo, M.A.F., Martinelli, A.E., Zinner, L.B.

“…The relative acid strength of lanthanum catalysts supported on paligorskyte was determined by thermodesorption of n-butylamine and infrared absorption…”
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Cosmology and fundamental physics with the ELT-ANDES spectrograph by Martins, C.J.A.P., Cooke, R., Liske, J., Murphy, M.T., Noterdaeme, P., Schmidt, T.M., Alcaniz, J. S., Alves, C. S., Balashev, S., Cristiani, S., Di Marcantonio, P., Génova Santos, R., Gonçalves, R. S., González Hernández, J. I., Maiolino, R., Marconi, A., Marques, C. M. J., Melo e Sousa, M. A. F., Nunes, N. J., Origlia, L., Péroux, C., Vinzl, S., Zanutta, A.

“…State-of-the-art 19th century spectroscopy led to the discovery of quantum mechanics, and 20th century spectroscopy led to the confirmation of quantum…”
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