Search Results - "Veiga, João P."

Carbon Footprint of Brazilian Agriculture Based on Field Operations by Veiga, João P. S., Popin, Gustavo V., Cerri, Carlos E. P., Romanelli, Thiago L.

“…Agriculture has historically relied on fossil fuels as the primary source of energy, leading to significant greenhouse gas (GHG) emissions and exacerbating…”
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Later prehistoric tin mining in the Ervedosa mine (Vinhais, Portugal): evidence and context by Meunier, Emmanuelle, Dias, Filipa, Fonte, João, Lima, Alexandre, Rodrigues, Alexandra, Bottaini, Carlo, Silva, Rui J. C., Veiga, João P., Pereira, Manuel F. C., Figueiredo, Elin

“…This paper presents a comprehensive study of the evidence for ancient tin mining at the Ervedosa mine (Vinhais, Portugal). The geological context of the site…”
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Sintering, Crystallization, and Dielectric Behavior of Barium Zinc Borosilicate Glasses-Effect of Barium Oxide Substitution for Zinc Oxide by Monteiro, Regina C. C., Lopes, Andreia A. S., Lima, Maria M. A., Veiga, João P., Silva, Rui J. C., Dias, Carlos J., Davim, Erika J. R., Fernandes, Maria H. V.

“…Barium zinc borosilicate glasses with a molar composition xBaO‐(60−x)ZnO‐30B2O3‐10SiO2, where x ranged from 0 to 60 mol%, were prepared using melt‐quenching…”
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Tin and Bronze Production at the Outeiro de Baltar Hillfort (NW Iberia) by Elin Figueiredo, Alexandra Rodrigues, João Fonte, Emmanuelle Meunier, Filipa Dias, Alexandre Lima, José Alberto Gonçalves, Luís Gonçalves-Seco, Filipe Gonçalves, Manuel F. C. Pereira, Rui J. C. Silva, João P. Veiga

“…Findings of Iron Age metallurgical activities related to tin metal and mining are very rare. In the present work, we present a detailed study of the Outeiro de…”
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Orange Pickeringite from the Algares 30-Level Adit, Aljustrel Mine, Iberian Pyrite Belt, Portugal by Teresa P. Silva, João X. Matos, Daniel de Oliveira, Igor Morais, Pedro Gonçalves, Luís Albardeiro, Fernanda Carvalho, Ugur D. Menda, João P. Veiga

“…The sheltered environment of the Algares +30 level adit (underground mine gallery) contributes to the preservation of secondary water-soluble minerals formed…”
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Contribution to the Understanding of the Colour Change in Bluish-Grey Limestones by Silva, Teresa P., de Oliveira, Daniel, Veiga, João P., Lisboa, Vitor, Carvalho, Jorge, Barreiros, M. Alexandra, Coutinho, Mathilda L., Salas-Colera, Eduardo, Vigário, Rogério

“…Bluish-grey limestones have been extensively used as ornamental stones for decoration purposes in buildings, as well as in works of art, and accordingly, have…”
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Mineral Inventory of the Algares 30-Level Adit, Aljustrel Mine, Iberian Pyrite Belt, Portugal by Teresa P. Silva, João X. Matos, Daniel De Oliveira, João P. Veiga, Igor Morais, Pedro Gonçalves, Luís Albardeiro

“…Mining activity in Algares (Aljustrel Mine, Portuguese sector of the Iberian Pyrite Belt, IPB) stems prior to Roman times. As the orebody is vertical and…”
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Degradation of dental ZrO2-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses by Jorge PERDIGAO, Ana M.PINTO, Regina C.C.MONTEIRO, Francisco M.BRAZ FERNANDES, Pedro LARANJEIRA, Joao P.VEIGA

“…The aim was to investigate the effect of simulated low-temperature degradation (s-LTD) and hydrothermal fatigue on the degradation of three ZrO2-based dental…”
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Degradation of dental ZrO2-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses by PERDIGÃO, Jorge, PINTO, Ana M., MONTEIRO, Regina C.C., FERNANDES, Francisco M. BRAZ, LARANJEIRA, Pedro, VEIGA, João P.

“…The aim was to investigate the effect of simulated low-temperature degradation (s-LTD) and hydrothermal fatigue on the degradation of three ZrO2-based dental…”
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Crystal growth in zinc borosilicate glasses by Kullberg, Ana T.G., Lopes, Andreia A.S., Veiga, João P.B., Monteiro, Regina C.C.

“…Glass samples with a molar composition (64+x)ZnO–(16−x)B2O3–20SiO2, where x=0 or 1, were successfully synthesized using a melt-quenching technique. Based on…”
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Erratum to: Degradation of dental ZrO2-based materials after hydrothermal fatigue. Part I: XRD, XRF, and FESEM analyses [Dental Materials Journal 2012; 31(2): 256–265] by PERDIGÃO, Jorge, PINTO, Ana M., MONTEIRO, Regina C.C., FERNANDES, Francisco M. BRAZ, LARANJEIRA, Pedro, VEIGA, João P.

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Mineralogy and chemistry of incrustations resulting from the 2014–2015 eruption of Fogo volcano, Cape Verde by Silva, Teresa P., De Oliveira, Daniel P. S., Veiga, João P., Ávila, Paula, Candeias, Carla, Salas-Colera, Eduardo, Caldeira, Rita

“…The last eruption of the Fogo volcano, in the Cape Verde Archipelago, occurred in 2014–2015. A mineralogical and chemical study was undertaken on fumarole…”
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An experimental approach for smelting tin ores from Northwestern Iberia by Figueiredo, Elin, Lackinger, Aaron, Comendador Rey, Beatriz, Silva, Rui J.C., Veiga, João P., Mirão, José

“…In the present work microstructural and chemical analysis of tin and slag that resulted from three smelting experiments reconstructing prehistoric conditions…”
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Thermal characteristics and crystallization behavior of zinc borosilicate glasses containing Nb2O5 by Monteiro, Regina C.C., Lopes, Andreia A.S., Lima, Maria M.R.A., Veiga, João P.B.

“…Glasses based on the molar composition 60ZnO·(40-x)B2O3·xSiO2, x = 10 or 20, with small additions of Nb2O5 (2.5, 5, 7.5 and 10 mol%), were prepared by…”
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