TRILLO DE LEYVA , José María

Este libro, que tiene los textos y dibujos de Álvaro Siza como protagonistas, inaugura una serie dedicada a la escritura y el dibujo, prolongaciones de nuestras manos, actividades que amplían nuestros pensamientos y juegan con el tiempo liberándose incluso de nuestra presencia, es decir, transportando el tiempo presente a otro por venir. Como...

No description

Reconstructive transformations in layered silicates need a high temperature in order to be observed. However, very recently, some systems have been found where transformation can be studied at temperatures 600°C below the lowest experimental results previously reported, including sol-gel methods. We explore the possible relation with the...

The local structure of the interlamellar lanthanide ions in montmorillonite upon heating is studied. The analysis of the EXAFS data has been carried out using two model environments, that of La3+ aquocomplex and that of the lanthanum oxide. The information thus obtained is crucial in elucidating the intercalation mechanism and demonstrates the...

In a previous work a relationship was found between the amount of OH groups at the surface of TiO2 and Cr203 catalysts, and their activity in fortnic acid dehydration. In this paper the effect of the treatment with diborane on the activity of those catalyst has been studied. The activation energy and frequency factor for dehydration reaction...

Se ha investigado el efecto de diversos tratamientos térmicos sobre la estructura porosa de una montmorillonita denominada Trancos que dan lugar a pilares de óxido de aluminio una, y óxido de aluminio-lantano, la otra. Para ello, se han usado las técnicas de difracción de rayos X, adsorción de nitrógeno, microscopía electrónica de barrido y...