149 research outputs found
Francis Lucas ‘of Bruges’ and Textual Criticism of the Vulgate Before and After the Sixto-Clementine (1592)
No full textThis article deals with to the little known but very influential Leuven biblical scholar Francis Lucas ‘of Bruges’ (1548/9–1619). In particular, it traces the change of methodology in Lucas’ textual critical activity, due to publishing of the Sixto-Clementine Vulgate (1592), intended by the Vatican as the definitive text of the Vulgate. The author shows how Lucas was a realist and adapted his scholarly activities in the field of textual criticism to the contemporary ecclesiastical policies and sensitivities through the analysis of Lucas’ works.sponsorship: KULeuven/Fscirestatus: Publishe
Aprendiendo sobre los eclipses de Sol y otros fenómenos astronómicos
No full textEn esta “temporada de eclipses” nos unimos el Grupo de Astrónomos de la Facultad de Astronomía de la Universidad Nacional de La Plata y el grupo de aficionados de la Comisión Casildense del Espacio, para acercarnos a la comunidad y preguntarnos juntos por qué y c´omo ocurren los distintos tipos de eclipses, y deducir otros fenómenos astronómicos relacionados. También armamos cámaras oscuras para observar de manera segura los próximos eclipses totales de Sol visibles desde Argentina (en 2019 y 2020). En este artículo contamos algunas ideas para trabajar estas preguntas a partir de experiencias y mucho más.Fil: Iannuzzi, Matilde. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Corti, Mariela Alejandra. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Witteveen, Yvonne. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Vallverdú, Rodolfo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: De Vito, María Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Gimenez Benitez, Sixto. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaReunión Anual de la Asociación Argentina de AstronomíaViedmaArgentinaUniversidad Nacional de Río NegroInstituto Argentino de Radioastronomí
Modulating the interaction between gold and TiO2 nanowires for enhanced solar driven photoelectrocatalytic hydrogen generation
No full textThe interaction strength of Au nanoparticles with pristine and nitrogen doped TiO2 nanowire surfaces was
analysed using density functional theory and their significance in enhancing the solar driven photoelectrocatalytic
properties was elucidated. In this article, we prepared 4-dimethylaminopyridine capped Au
nanoparticle decorated TiO2 nanowire systems. The density functional theory calculations show {101}
facets of TiO2 as the preferred phase for dimethylaminopyridine–Au nanoparticles anchoring with a binding
energy of 8.282 kcal mol1
. Besides, the interaction strength of Au nanoparticles was enhanced
nearly four-fold (35.559 kcal mol1
) at {101} facets via nitrogen doping, which indeed amplified the Au
nanoparticle density on nitrided TiO2. The Au coated nitrogen doped TiO2 (N–TiO2–Au) hybrid electrodes
show higher absorbance owing to the light scattering effect of Au nanoparticles. In addition, N–TiO2–Au
hybrid electrodes block the charge leakage from the electrode to the electrolyte and thus reduce the
charge recombination at the electrode/electrolyte interface. Despite the beneficial band narrowing effect
of nitrogen in TiO2 on the electrochemical and visible light activity in N–TiO2–Au hybrid electrodes, it
results in low photocurrent generation at higher Au NP loading (3.4 107 M) due to light blocking the
N–TiO2 surface. Strikingly, even with a ten-fold lower Au NP loading (0.34 107 M), the synergistic effects
of nitrogen doping and Au NPs on the N–TiO2–Au hybrid system yield high photocurrent compared to
TiO2 and TiO2–Au electrodes. As a result, the N–TiO2–Au electrode produces nearly 270 mmol h1 cm2
hydrogen, which is nearly two-fold higher than the pristine TiO2 counterpart. The implications of these
findings for the design of efficient hybrid photoelectrocatalytic electrodes are discussed.
IntroducGlobal Research Laboratory (GRL) Program through the National Research Foundation of Korea (NRF) - Ministry of Science. K20704000003TA050000310
Japan Society for the Promotion of Science (JSPS)
University Jaume I. P1.1B2014-51
Government of the Russian Federation. 074-U0
Composición de un portafolio de música nacionalista ecuatoriana en base al análisis de la obra del compositor Sixto Maria Durán
No full textThis research project plans to test the potential of the stylistic
resources of the compositions of Sixto María Durán using them as the main tool for musical composition, contributing and reaffirming Ecuadorian music. Being Durán one of the first composers in nationalism opens the way to studying various paths within the compositional processes in aboriginal and mestizo music of the Ecuadorian region as well as taking the main elements of Inca music and its development in pentaphony as well as mestizo music being greatly influenced by European culture. This project is based on the analysis of the compositions of Sixto María Durán, focusing mainly on the study of his piano compositions focused on nationalism. After obtaining the results of our analysis, we will consolidate a similar model to compositions of the author as well as new compositions that demonstrate the potential of the resources obtained in our analysis, creating a musical portfolio of four compositions that lasts around 30 minutes. Finally, we will define the stylistic devices that Durán uses in his compositions as concise tools used in Ecuadorian nationalist compositions.El presente proyecto de investigación planea comprobar el potencial de los recursos estilísticos de la obra de Sixto María Durán, utilizándolas como principal herramienta para la composición musical, que aporte y reafirme la música del Ecuador. Siendo Durán uno de los compositores pioneros dentro del nacionalismo, abre paso al estudio de distintas ramas dentro de los procesos composicionales en la música aborigen y mestiza de la región ecuatoriana, tomando como principales elementos la música indígena y su desarrollo en la pentafonía, así como la música mestiza y su gran influencia por parte de la cultura europea. Es así como el presente proyecto se basa en el análisis de la obra de Sixto María Durán, tomando como motivo de estudio las obras compuestas para piano haciendo alusión al nacionalismo. Posteriormente a tener los resultados del análisis, es decir los recursos estilísticos de la obra de Durán, se procede a realizar un modelo similar a las composiciones del Autor, y nuevas propuestas que demuestren el potencial de estos recursos, creando así un portafolio musical de cuatro obras las cuales suman aproximadamente 30 minutos de duración. Finalmente, se recopilan las conclusiones por las cuales se confirman los recursos estilísticos que usó Durán en sus obras, como una herramienta concisa dentro de la composición nacionalista ecuatoriana, además de ello se compilan también los descubrimientos y los posibles avances dentro de composición y materias que giran en torno al tema
(Photo)electrochemical approaches for renewable energy storage into high-added value chemicals
No full textDoctorat internacionalAn energy transition toward a clean and sustainable model is crucial to overcome the well-known problems related to traditional coal energy consumption. In this regard, the generation and storage of renewable energies is key to this transition. (Photo)electrochemical systems powered by renewable energy have emerged as a promising technology for storing renewable energy in chemical bonds. However, the scalability of efficient, durable and cost-effective (photo)electrochemical systems is still challenging. With this purpose, this doctoral thesis aims at studying the implementation of non-critical materials as catalysts for (photo)electrochemical conversion reactions of interest. The main contributions of this thesis are the optimized synthesis of Cu2-xS electrocatalysts for the H2 evolution and for the CO2 reduction. It also provides comprehensive electrochemical, structural, and morphological characterization and the implementation of selective contact engineering strategies for the development of versatile switchable photoelectrodes based on heterostructured inorganic halide perovskite CsPbBr3 nanocrystals for organic transformations.Programa de Doctorat en Cièncie
The Complex Role of Carbon Nitride as a Sensitizer in Photoelectrochemical Cells
No full textThe role of carbon nitride (C3N4) as an absorber in a photoelectrochemical cell is reported. C3N4-sensitized TiO2 mesoporous film created via in-situ, vapor-transport growth results in a direct Ti–O–C bonding. The material hybridization shows a unique electronic transition at the interface, leading to strongly enhanced visible-light absorption and photoactivity
Geophysical characterization of a low sulfidation epithermal gold and silver deposit, Mendoza, Argentina
No full textThe combined analysis of aeromagnetic and gamma-ray spectrometry data, allowed us to determine and differentiate the responses of hydrothermal rocks units and low sulfidation epithermal gold systems, in the south area of the San Rafael Block, in the Mendoza province. The data processing approach was focused on mapping geological limits and structures, and their response over the gold mineralization area, linked to hydrothermal zones. To do this, filtering algorithms, such as vertical derivative, tilt derivative, logistic function, and analytic signal were applied to the aeromagnetic data. For the analysis of gamma-ray spectrometry data, images of K, eU, and eTh concentrations, K/eTh ratios, and an F-parameter were used. The analytic signal filtering of the data reveals relatively low magnetic intensity zones associated with hydrothermally altered rock areas. The radiometric data delineate local anomalies that reflect enrichment with high potassium values in the deteriorated zones. A broad K/eTh anomaly correlates with the extension of the magnetic low intensity zones, indicating a generalized potassium enrichment in the Don Sixto area. These results indicate that the main structural directions are arranged in NW-SE strikes and the secondary ones in N–S strikes. These lineaments are spatially correlated with the most significant structures in the study area, evidencing that the mineral deposits located in the study area respond to the main lineaments. In addition, the main geophysical characteristics allowed us to identify the zone of hydrothermal alteration related to the low sulfidation epithermal gold and silver deposit Don Sixto, which would be related to high levels of K/eTh ratios and low intensity magnetic zones.Fil: Richarte, Daniel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Correa Otto, Sebastian Ariel. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Lince Klinger, Federico Gustavo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; ArgentinaFil: Gimenez, Mario Ernesto. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentin
Panchromatic Sensitized Solar Cells Based on Metal Sulfide Quantum Dots Grown Directly on Nanostructured TiO2 Electrodes
No full textThe use of narrow band gap semiconductors such as PbS may expand the light
absorption range to the near-infrared region in quantum-dot-sensitized solar cells (QDSCs),
increasing the generated photocurrent. However, the application of PbS as a sensitizer in
QDSCs causes some problems of stability and high recombination. Here, we show that the
direct growth of a CdS coating layer on previously deposited PbS by the simple method of
successive ionic layer adsorption and reaction (SILAR) minimizes these problems. A
remarkable short-circuit current density for PbS/CdS QDSCs is demonstrated, !11 mA/
cm2, compared to that of PbS QDSCs, with photocurrents lower than 4 mA/cm2, using
polysulfide electrolyte in both cells. The cell efficiency reached a promising 2.21% under 1
sun of simulated irradiation (AM1.5G, 100 mW/cm2). Enhancement of the solar cell
performance beyond the arithmetic addition of the efficiencies of the single constituents (PbS and CdS) is demonstrated for the nanocomposite PbS/CdS configuration. PbS dramatically increases the obtained photocurrents, and the CdS coating stabilizes the solar cell behavior
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