Results 41 to 50 of about 6,762 (164)
Water-to-cement ratio influence on low-carbon cements performances [PDF]
, 2019 Portland Cement (PC) is the most important active ingredient in most of the construction concrete. However, the PC production is associated with a high carbon dioxide release (around 1 ton of CO2 per ton of PC).
Cuesta-Garcia, Ana Maria +5 more
core
Revista de Química, 2014 TeleSpec: simula tus espectros IR PhET Interactive simulationse-crystallography course: curso de cristalografía ...
Victoria Landa Fitzgerald
doaj
Evaluation of Ceramic Properties of Bauxitic Materials from SE of Iberian Range
ChemEngineeringThe use of aluminum-rich clays and bauxites as refractory materials is common. Upon firing, these materials form mullite crystals in the shape of needles embedded in a siliceous and vitreous matrix, with mullite being responsible for the refractory ...
Domingo Martín +7 more
doaj +1 more source
Estudios Geologicos, 1988 Las «areniscas del Aljibe» son materiales bimodales constituidos en su mayor parte por cuarzos eólicos con «coating» ferruginoso o arcilloso y cemento de cuarzo sintaxial. Tanto la composición mineralógica de la muestra total como la de la fracción < 2 μ
P. Rodríguez Jiménez, M. D. Ruiz Cruz
doaj +1 more source
Hydration study of Belite-Alite Calcium Sulfoaluminate (BACSA) cement blended with fly ash [PDF]
, 2015 The main objective of this work is to understand the effect of the addition of fly ash (0, 15 and 30 wt%) in the hydration of a BACSA cement paste (water/cement=0.4) prepared with 12 wt% of anhydrite. The pastes were characterized, at different hydration
García-Aranda, Miguel Ángel +4 more
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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 +5 more
wiley +1 more source
A influência do fator de vibração térmica na densidade eletrônica de cristais bidimensionais
Revista Brasileira de Ensino de FísicaEste trabalho mostra o efeito da vibração térmica na densidade eletrônica de cristais bidimensionais, usando o programa Mathematica. É apresentado um modelo de cristal simples para ajudar no ensino de conceitos básicos relacionados à cristalografia.
Plinio Delatorre +1 more
doaj +1 more source
Mineralogía y génesis de las arcillas de las unidades del Campo de Gibraltar. V. Unidad de Bolonia
Estudios Geologicos, 1990 En este trabajo se recogen los resultados obtenidos a partir del estudio mineralógico de la Unidad de Bolonia. De los perfiles estudiados, el del Cabrito, caracterizado por la asociación mineralógica caolinita-ilita, interestratificados I-E, es similar ...
P. Rodríguez Jiménez, M. D. Ruiz Cruz
doaj +1 more source
Influence of Nb-doping on the structural and electrical properties of lanthanum molybdates, La5.4MoO11.1 [PDF]
, 2018 Nowadays, hydrogen is receiving a great deal of attention as an energy carrier. Commonly, it is obtained by hydrocarbons reforming, such as natural gas, coal and biomass.
Canales-Vázquez, J. +5 more
core
Asymmetric amplification in amino acid sublimation involving racemic compound to conglomerate conversion [PDF]
, 2011 A straightforward unprecedented sublimation protocol that reveals both conversion of a racemic compound into a racemic conglomerate and subsequent enantioenrichment has been developed for the proteinogenic amino acid valine.
Cintas, Pedro +4 more
core +4 more sources