Results 61 to 70 of about 26,170 (211)

Mineralogical characterization of Sn deposits from the Santa Fe District, Bolivia [PDF]

, 2015
The Sn-Zn-Pb-Ag Japo-Santa Fe-Morococala ore deposit is located in the Central Andean Belt province. The ore mineralization is hosted in a Paleozoic metasedimentary sequence and porphyritic Oligocene-Miocene igneous rocks. Ore minerals occur in veins and
Alfonso Abella, María Pura, Canet Miquel, Carles, García-Vallès, Maite, Jiménez-Franco, Abigail, Trujillo, Juan Elvys   +4 more
core  

Grotta Romanelli (Southern Italy, Apulia). Legacies and issues in excavating a key site for the Pleistocene of the Mediterranean [PDF]

, 2018
Grotta Romanelli, located on the Adriatic coast of southern Apulia (Italy), is considered a key site for the Mediterranean Pleistocene for its archaeological and palaeontological contents. The site, discovered in 1874, was re-evaluated only in 1900, when
Brilli, M, Giustini, F, Iurino, Da, Lembo, G, Massussi, M, Mazzini, I, Mecozzi, B, Muttillo, B, Sardella, R, Sigari, D, Tucci, S, Voltaggio, M   +11 more
core   +2 more sources

Optimized bifunctional CuNiMgAl catalysts for efficient synthesis of the renewable bioproduct glycerol carbonate

Biofuels, Bioproducts and Biorefining, Volume 19, Issue 5, Page 1271-1288, September/October 2025.
Abstract This paper presents a novel technology for converting glycerol, a byproduct of the biodiesel industry, into glycerol carbonate, a high‐value bioproduct. The effect of calcination temperature on the synthesis of quaternary Cu‐Ni‐Mg‐Al catalysts (MMO‐Cu15Ni15‐Tz) and their application in the transesterification reaction was investigated ...
Dalma S. Argüello, Isabel Barroso‐Martín, Nancy F. Bálsamo, Griselda A. Eimer, Mónica E. Crivello, Enrique Rodríguez‐Castellón   +5 more
wiley   +1 more source

Efeitos das variações sazonais do clima tropical úmido sobre as águas e sedimentos de manguezais do estuário do rio Marapanim, costa nordeste do Estado do Pará Effects of seasonal variations' on the mangroves' waters and sediments of the Marapanim estuary, northeast coast of Para State

Acta Amazonica, 2008
Para avaliar o impacto das variações climáticas, de curta duração, sobre os ecossistemas de manguezais amazônicos, foi estudada a costa nordeste do Pará entre as coordenadas: 00º 32' 30" S / 00º 52' 30" S e 47º 28' 45" W / 47º 45' 00" W. Foram amostrados
José Francisco Berrêdo, Marcondes Lima Costa, Maria do Perpétuo Socorro Progene   +2 more
doaj   +1 more source

Contribució a l'estudi de la mineralogia catalana [PDF]

Butlletí de la Institució Catalana d'Història Natural, 1931
Closas i Miralles, Josep
openaire   +2 more sources

Pd Nanoparticles Supported on Activated Carbon and Their Application in the Oxidative Condensation Reaction of Furfural: Effect of Base and Oxidizing Agent on Catalytic Behavior and Deactivation

ChemCatChem, Volume 17, Issue 17, September 5, 2025.
Catalysts with varying palladium (Pd) loading supported on activated carbon were assessed for their effectiveness in the oxidative condensation of furfural. Furan‐2‐acrolein was the primary product, depending on the palladium content. Reusability tests showed a decline in the yield of furan‐2‐acrolein.
Rocío Maderuelo Solera, Eleonora Monti, Ramón Moreno‐Tost, Cristina García‐Sancho, Pedro Maireles‐Torres, Juan Antonio Cecilia, Nikolaos Dimitratos   +6 more
wiley   +1 more source

Alteração mineralógica de Neossolos em uma climo-litossequência no Planalto do Rio Grande do Sul Mineral weathering in Neossolos in a climo-litosequence on the Rio Grande do Sul Plateau, Brazil

Ciência Rural, 2012
No Estado do Rio Grande do Sul (RS), os Neossolos Litólicos e Neossolos Regolíticos são solos que têm sofrido forte pressão de uso, demandando maior conhecimento sobre sua gênese e mineralogia.
Fabrício de Araújo Pedron, Antonio Carlos de Azevedo, Ricardo Simão Diniz Dalmolin   +2 more
doaj   +1 more source

Effetto di mineralogia e granulometria sul comportamento di transizione di miscele di sabbia. [PDF]

, 2014
Il comportamento di transizione è stato identificato per diverse tipologie di terreno, dai terreni con lacuna granulometrica a limi e sabbie ben gradate.
Coop M.R., Nocilla A., Ponzoni E.
core  

Enhanced Oxygen Evolution Reaction Performance of Niobium–Cobalt Oxide Catalysts in Acidic and Alkaline Media

Advanced Sustainable Systems, Volume 9, Issue 8, August 2025.
The electronic modulation of Nb‐doped Co3O4 catalyst showcases enhanced activity and extended stability for OER in both alkaline (1M KOH) and acidic (0.5M H2SO4) electrolytes. The higher activity emanated from the synergistic effect between the Nb5+ dopant and Co3O4.
Kassa Belay Ibrahim, G.P. Darshan, Gabriele Benetti, Pankaj Kumar, Enrique Rodríguez‐Castellón, Tofik Ahmed Shifa, Elisa Moretti, Alberto Vomiero   +7 more
wiley   +1 more source

Pedogênese de uma seqüência de solos desenvolvidos de arenito na região de Piracicaba (SP)

Revista Brasileira de Ciência do Solo, 2001
O trabalho abordou a formação de solos com horizonte B textural e teve por objetivo identificar os processos pedogenéticos envolvidos na formação de lamelas, do gradiente textural abrupto, assim como suas implicações sobre os atributos físicos, químicos ...
A. L. Mafra, E. F. Silva, M. Cooper, J. L. I. Demattê   +3 more
doaj   +1 more source