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First Principles Calculations of Atomic and Electronic Structure of TiAl3+- and TiAl2+-Doped YAlO3
2021
In this paper, the density functional theory accompanied with linear combination of atomic orbitals (LCAO) method is applied to study the atomic and electronic structure of the Ti3+ and Ti2+ ions substituted for the host Al atom in orthorhombic Pbnm bulk YAlO3 crystals. The disordered crystalline structure of YAlO3 was modelled in a large supercell containing 160 atoms, allowing simulation of a substitutional dopant with a concentration of about 3%. In the case of the Ti2+-doped YAlO3, compensated F-center (oxygen vacancy with two trapped electrons) is inserted close to the Ti to make the unit cell neutral. Changes of the interatomic distances and angles between the chemical bonds in the de…
Dehydration of Fructose to 5-HMF over Acidic TiO2 Catalysts
2020
Different solid sulfonic titania-based catalysts were investigated for the hydrothermal dehydration of fructose to 5-hydroxymethylfurfural (5-HMF). The catalytic behavior of the materials was evaluated in terms of fructose conversion and selectivity to 5-HMF. The surface and structural properties of the catalysts were investigated by means of X-ray diffraction (XRD), N2 adsorption isotherms, thermo-gravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS) and acid capacity measurements. Special attention was focused on the reaction conditions, both in terms of 5-HMF selectivity and the sustainability of the process, choosing water as the solvent. Among the various process condition…
Una tabla inédita de Fernando Yáñez y nueva luz sobre su estancia en Almedina (1518-1525)
2020
The contribution presents a new acquisition for the catalog of Fernando Yáñez, a Holy Family dating back to 1523, shedding new light on the artist?s production in the third decade of the sixteenth century during his return to Almedina, his birthplace, in a time frame that divides the works for Valencia, like the retablo mayor for the city?s cathedral, from his altarpieces for Cuenca.
Disputatio theologica in qua praecipua capita Summae Doctoris angelici D. Thomae Aquinatis cum lib. XII. ... Melch. Cani nonnullisque historicis diss…
1789
Escut xil. dels dominicans a la port. Banda Sign.: [A]2, B-N2, O1 Reclams
Disputatio theologica in qua praecipua capita Summae Doctoris angelici D. Thomae Aquinatis cum lib. XII. ... Melch. Cani nonnullisque historicis diss…
Escut xil. dels dominicans a la port Banda Sign.: [A]2, B-N2, O1 Reclams
Energy requirement and kinetics of transport of poly(A)-free histone mRNA compared to poly(A)-rich mRNA from isolated L-cell nuclei.
1989
ATP-promoted efflux of poly(A)-rich RNA from isolated nuclei of prelabeled mouse lymphoma L5178y cells has an activation energy of 51.5 kJ/mol, similar to that found for the nuclear envelope nucleoside triphosphatase (48.1 kJ/mol) assumed to be involved in mediating nucleocytoplasmic transport of at least some RNA. Here we show that efflux of two specific poly(A)-rich mRNAs (actin and beta-tubulin) from isolated L-cell nuclei is almost totally dependent on the presence of ATP, while efflux of poly(A)-free histone mRNA (H4, H2B, and H1) also occurs to a marked extent in the absence of this nucleotide. Measurements of temperature dependence of transport rate revealed an activation energy of 5…