Results 31 to 40 of about 6,762 (164)

Mineralogía y génesis de las arcillas del Campo de Gibraltar. III. Unidad de Algeciras

Estudios Geologicos, 1988
Este trabajo completa el estudio de la unidad de Algeciras, iniciado anteriormente (Ruiz Cruz et al., 1987), con el estudio de la serie tipo El Rinconcillo.
P. Rodríguez Jiménez, M. D. Ruiz Cruz
doaj   +1 more source

Influence of lanthanum doping on the structure and transport properties of CeO2 [PDF]

, 2019
LaxCe1-xO2-x/2 materials are oxide and/or proton conductors depending on the La-content and they are of interest for numerous electrochemical applications at high temperatures, including membranes for hydrogen separation and fuel cell electrolytes ...
Dos Santos-Gómez, Lucía, Losilla, Enrique R., Marrero-López, David, Porras-Vázquez, José Manuel, Zamudio-García, J   +4 more
core  

Co‐Impregnated MgAl Layered Double Hydroxide as an Efficient Catalyst for Glycerol Oligomerization

Applied Organometallic Chemistry, Volume 40, Issue 1, January 2026.
A cobalt(II) acetylacetonate–impregnated MgAl LDH catalyst was developed, showing enhanced basicity and superior activity in glycerol oligomerization, achieving 68% conversion and 27% diglycerol selectivity. The catalyst maintained high performance over three recycling cycles, with structural and surface modifications confirmed by comprehensive ...
Fernando José Soares Barros, Ramón Moreno‐Tost, Juan A. Cecilia, Francisco Murilo Tavares de Luna, Enrique Rodríguez‐Castellón, Rodrigo Silveira Vieira   +5 more
wiley   +1 more source

Las mineralizaciones de barita de Cerro del Hierro (Sevilla). Características mineralógicas y geoquímica

Estudios Geologicos, 1992
En los materiales carbonatados del Cámbrico inferior del Cerro del Hierro (Zona de Ossa-Morena) existen diversos tipos de mineralizaciones de barita (estratoligadas, filonianas y kársticas).
A. Miras Ruiz, E. Galán Huertos
doaj   +1 more source

Synthesis of type A zeolites from natural kaolinite for their application in CO2 capture processes [PDF]

, 2017
Climate change is the greatest environmental threat of the 21st century, with major economic, social and environmental consequences. The level of carbon dioxide (CO2) emissions has increased by 31%, therefore, both governments and the scientific ...
Azevedo, Diana C.S., Cavalcante Jr., Celio L., Cecilia, Juan Antonio, Jiménez-Gómez, Carmen Pilar, Rodriguez-Castellon, Enrique, Vilarrasa García, Enrique   +5 more
core  

Chemoenzymatic Synthesis of Triazololactams Structurally Related to Pancratistatin [PDF]

, 2017
Four tricyclic lactams that structurally resemble alkaloids with the pancratistatin skeleton were synthetized from bromobenzene by a chemoenzymatic strategy.
Bastida, Bellomo, Bellomo, Bellomo, Bellomo, Bellomo, Brovetto, Brovetto, Cao, Carless, Carrau, Carrera, Carrera, Chrétien, Desjardins, Ghavre, Gibson, Gibson, Goietsenoven, Griffen, Griffin, He, Hudlicky, Hudlicky, Hudlicky, Hudlicky, Kolb, Kornienko, la Sovera, la Sovera, la Sovera, Labora, Lamoral-Theys, Ma, Ma, Ma, McNulty, Plietker, Rinner, Staudinger, Thevenet, Tian, Vila, Vshyvenko, Vshyvenko, Vshyvenko, Vshyvenko, Wu, Yadav   +48 more
core   +1 more source

Pair distribution function studies in cementitious systems [PDF]

, 2017
The analysis of amorphous/nanocrystalline phase(s) within cement matrices that contain high amounts of crystalline phase(s) is very challenging. Synchrotron techniques can be very useful to characterize such complex samples.1 This work is focused on ...
Cuesta-Garcia, Ana Maria, García-Aranda, Miguel Ángel, Gomez-de-la-Torre, Maria de los Angeles, Londono-Zuluaga, Diana, Santacruz-Cruz, Maria Isabel, Vallcorba, Oriol, Zea-Garcia, Jesus D.   +6 more
core  

Rietveld Quantitative Phase Analysis of Oil Well Cement: in Situ Hydration Study at 150 Bars and 150 °C [PDF]

, 2019
Oil and gas well cements are multimineral materials that hydrate under high pressure and temperature. Their overall reactivity at early ages is studied by a number of techniques including through the use of the consistometer.
Cuesta-Garcia, Ana Maria, Fraga, Edmundo, García-Aranda, Miguel Ángel, Gomez-de-la-Torre, Maria de los Angeles, Yañez-Casal, Armando, Zea-Garcia, Jesus D.   +5 more
core   +6 more sources

Modulation of the Acidity of HY, HBETA, and HZSM‐5 Zeolites by Lanthanum Incorporation for Selective Gasoline Desulfurization in the FCC Riser

ChemCatChem, Volume 17, Issue 21, November 10, 2025.
Desulfurization in the FCC riser is achieved by modifying zeolite catalysts with La3+ ions, promoting H2S formation from thiophenic compounds while suppressing secondary reactions. This approach enhances gasoline quality by increasing selectivity for H2S and enabling efficient condensation and alkylation, supporting cleaner fuel production and ...
Ronaldo C. Santos, Daniel F. Almeida, Anderson C. dos S. Silva, Yiu L Lam, José M. M. Ferreira, D. Ballesteros‐Plata, Enrique Rodríguez‐Castellón, Agustin Martínez, Luiz A. M. Pontes   +8 more
wiley   +1 more source

Geoquímica de los procesos de alteración hidrotermal en la mineralización de Sb de Mari Rosa (zona Centro Ibérica)

Estudios Geologicos, 1994
La zona Centro Ibérica del Macizo Hespérico contiene una serie de depósitos filonianos de antimonio de edad tardihercínica. Uno de ellos es la mineralización de Mari Rosa, encajada en metagrauvacas y pizarras pertenecientes al Complejo Esquisto ...
L. Ortega, R. Oyarzun, M. Gallego, J. Lillo   +3 more
doaj   +1 more source