Results 51 to 60 of about 7,690 (220)

Britholite-(Ce) from the metaluminous granite of SW Egypt

Mineralogia, 2023
Optical microscopy and scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) analyses were used to characterize britholite-(Ce) of the metaluminous granite (Proterozoic) intruded into the Nubian Formation in southwestern Egypt and ...
Hassan Kamaleldin M.
doaj   +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

Synthetic zeolite derived from coal fly ash decorated with magnetic alginate bead: Application to detoxification of arsenic and vanadium

Mineralogia, 2023
Heavy metal toxicity is highly demanding and challenging to clean up the pollutants. To recover the issues mentioned above, we propose a hydrothermal synthesis of zeolite (NaX-UP).
Swistun Eugeniusz, Sobczyk Maciej, Kumar A. Santhana Krishna, Tseng Wei-Lung, Bajda Tomasz   +4 more
doaj   +1 more source

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

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

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

8. Reunion de la Sociedad EspaNola de Mineralogia

, 1988
Available from Centro de Informacion y Documentacion Cientifica CINDOC. Joaquin Costa, 22. 28002 Madrid.
Sociedad EspaNola de Mineralogia, Madrid (Spain)
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

9. Reunion de la Sociedad EspaNola de Mineralogia

, 1989
Available from Centro de Informacion y Documentacion Cientifica CINDOC. Joaquin Costa, 22. 28002 Madrid.
Sociedad EspaNola de Mineralogia, Madrid (Spain)
core  

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