Search results for " Ni"
showing 10 items of 3074 documents
Carbon Nitride-Based Catalysts for High Pressure CO2 Photoreduction
2022
In the current research, the productivity of CO2 photoreduction has been boosted by performing the reaction in an innovative photocatalytic reactor, which allows for operation up to 20 bar. A set of photocatalysts were used, including three types of pristine TiO2, i.e., one commercially prepared (Evonik P25), one home-prepared by flame spray pyrolysis (FSP), and one obtained by the hydrolysis of TiCl4 (TiO2exCl), a bare thermo-exfoliated carbon nitride (C3N4-TE), and binary materials composed of TiO2 and C3N4-TE. The photoreduction was carried out in water at pH 14 and in the presence of Na2SO3 as a hole scavenger. Hydrogen and very small amounts of CO were detected in the head space of the…
Impact of Gamma Radiation on Dynamic R
2019
GaN high-electron-mobility transistors (HEMTs) are promising next-generation devices in the power electronics field which can coexist with silicon semiconductors, mainly in some radiation-intensive environments, such as power space converters, where high frequencies and voltages are also needed. Its wide band gap (WBG), large breakdown electric field, and thermal stability improve actual silicon performances. However, at the moment, GaN HEMT technology suffers from some reliability issues, one of the more relevant of which is the dynamic on-state resistance (RON_dyn) regarding power switching converter applications. In this study, we focused on the drain-to-source on-resistance (RDSON) char…
Di Maio, A
2012
Traduzione di poesie e brani tratti da varie opere di Wole Soyinka, Premio Nobel per la letteratura (1986)
Una metodologia innovativa per le famiglie al nido. Il Digital Storytelling tra competenze riflessive e narrative
2022
La pandemia da Covid-19 ha messo in discussione le modalità comunicative e inter-relazionali. Durante il periodo interessato, educatori ed educatrici si sono interrogati su come dialogare con i bambini e su come alimentare la relazione a distanza. La condivisione sociale del compito educativo, il sostegno e l’accompagnamento ai genitori è risultato terreno fertile per la promozione della crescita globale della persona. La relazione nido-famiglia e l’attività di narrazione – declinata secondo la tipologia del Digital Storytelling – costituiscono gli assi portati della ricerca qui descritta, condotta a distanza con 20 coppie di genitori di 20 bambini frequentanti un asilo nido comunale della …
Diversification in evolutionary arenas - assessment and synthesis
2019
Abstract Understanding how and why rates of evolutionary diversification vary is a central issue in evolutionary biology and ecology. The concept of adaptive radiation has attracted much interest, but is metaphorical and verbal in nature, making it difficult to quantitatively compare different evolutionary lineages or geographic regions. In addition, the causes of evolutionary stasis are relatively neglected. Here we review the central concepts in the evolutionary diversification literature and bring these together by proposing a general framework for estimating rates of diversification and quantifying their underlying dynamics, which can be applied across clades and regions and across spat…
Trastorno por tics. Trastorno obsesivo - compulsivo (TOC)
2020
Los cuadros que se estudian en este temas son sumamente interesantes desde el punto de vista del desarrollo psicológico. Los trastornos por tics guardan relación con la madurez de los procesos de control de la motricidad y de la descarga de los impulsos, base sobre la cual podrá pivotar, en un segundo momento, la conflictividad psíquica lo que, para algunos autores, los dota de dota continuidad con los síntomas obsesivos, que veremos en la segunda parte del tema.
Factores familiares y neuropsicológicos: implicaciones en los problemas de conducta y sociales de niños con TDAH
2013
El trastorno por déficit de atención con hiperactividad (TDAH) persiste hasta la adolescencia y la vida adulta, y se encuentra frecuentemente asociado a otros problemas y trastornos comórbidos que conjuntamente presentan repercusiones negativas a lo largo del ciclo vital. Dentro de este marco, se comprende la necesidad de realizar estudios longitudinales para conocer de forma precisa el curso del TDAH así como los diferentes factores que pueden afectar al mismo. El objetivo principal de este este estudio de seguimiento consistió en analizar las implicaciones de factores neuropsicológicos y factores del clima familiar en el curso de los problemas de conducta y sociales de niños con TDAH y en…
CCDC 861462: Experimental Crystal Structure Determination
2014
Related Article: Ayan Patra, Santu Kumar Saha, Tamal K. Sen, Luca Carrella, Ghezai T. Musie, Anisur Rahman Khuda-Bukhsh, Manindranath Bera|2014|Eur.J.Inorg.Chem.||5217|doi:10.1002/ejic.201402582
Benthic foodweb structure in a large shallow lake studied by stable isotope analysis
2014
The benthic foodweb structure of Lake Võrtsjärv, a large (270 km2), shallow, and turbid Estonian lake, was evaluated based on C and N stable-isotope signatures (δ13C, δ15N). Variation in δ13C between sampling sites was not related to site proximity to the littoral zone or the more vegetated southern part of the lake, but rather appeared to be influenced by in-situ site peculiarities. δ13C was stable temporally and between functional feeding groups, a result implying that the whole benthic food web of the lake relies largely on the same C source admixture, essentially particulate organic matter (POM). Thus, the foodweb composition of Lake Võrtsjärv is remarkably homogeneous given the lake’s …