Results 71 to 80 of about 26,318 (233)

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

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

Petrologia e Mineralogia - v. 1 [PDF]

, 2018
A produção deste trabalho é independente e surgiu da idéia e colaboração de professores, alunos e ex-alunos do curso de Geologia do Centro de Ciências Exatas, Naturais e da Saúde, da Universidade Federal do Espírito Santo. Estão contidos neste livro 5
Candotti, Calvin da Silva, Marques, Rodson de Abreu, Medeiros Júnior, Edgar Batista de, Oliveira, Fabricia Benda de   +3 more
core  

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

Características e efeito da fração granulométrica < 2 µm no comportamento de queima de uma argila Characteristics and effect of the granulometric fraction < 2 µm on the firing behavior of a clay

Cerâmica, 2007
Este trabalho tem por objetivo caracterizar a chamada "fração argila", isto é, com fração granulométrica < 2 µm, e avaliar por meio de dilatometria, análise termogravimétrica e térmica diferencial, e difração de raios X, seu efeito no comportamento de ...
C. M. F. Vieira, L. A. Terrones, R. Sánchez, S. N. Monteiro   +3 more
doaj   +1 more source

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

The Evolution of the Cocos‐North America‐Caribbean Triple Junction From Detrital Zircon Analysis

Tectonics, Volume 44, Issue 8, August 2025.
Abstract The tectonic framework and Cenozoic evolution of the Cocos–North America–Caribbean (Co–NA–Ca) triple junction remain subjects of major geological importance due to their complexity and regional impact. New U–Pb zircon geochronology of detrital sediments and detailed structural and geomorphic mapping from southern Chiapas, Mexico, provide ...
Mattia Parolari, Rogelio Hernández‐Vergara, Elisa Fitz‐Díaz, Gabriel Serrano‐López, Arturo Gómez‐Tuena, Apolinar Albiter‐Díaz, David Meza‐Fematt, José G. Cavazos‐Tovar   +7 more
wiley   +1 more source

Pedogenic iron oxides in soils of the Acre State, Brazil

Ciência Rural, 2018
: Iron oxides are environmental indicators and influence on physical and chemical behavior of soils. This research aimed to identify and characterize pedogenic iron oxides in soils of the Acre state, Brazil.
Alberto Vasconcellos Inda, Jessé Rodrigo Fink, Tatiele Fruett dos Santos   +2 more
doaj   +1 more source

Rupture and Relamination of Continental Lithosphere in a Subduction System (Variscan Orogeny, SW Iberia)

Tectonics, Volume 44, Issue 7, July 2025.
Abstract Relamination is closely connected to subduction zones. Despite the numerous high‐P metamorphic belts recognized on Earth, relamination remains a poorly documented process. We present a continental subduction zone where the exhuming high‐P rocks became a relaminant under the upper plate.
Rubén Díez Fernández, Diana Moreno‐Martín, Alejandro Díez Montes, Esther Rojo‐Pérez, Irene Novo‐Fernández, Luis Miguel Martín Parra, Jerónimo Matas, Francisco J. Rubio Pascual   +7 more
wiley   +1 more source

Turmalinitos do Grupo Brusque na região entre São João Batista e Tijucas, Santa Catarina, Brasil

Geologia USP. Série Científica, 2013
O Cinturão Dom Feliciano no Estado de Santa Catarina é representado pelos grupos Itajaí e Brusque e o Batólito Florianópolis. A Formação Rio do Oliveira, basal do Grupo Brusque, constitui-se de unidades metabásicas/cálcio-silicáticas, metavulcânicas ...
Gianna Maria Garda, Fabio Brentan, Miguel Angelo Stipp Basei   +2 more
doaj