Search results for "Porte"
showing 10 items of 1894 documents
An exploratory study to investigate emotion elicited by immersive ambiances
2011
Food behaviour is modulated by the eating situation and environment. In a previous study, we investigated drink choices according to the ambiance by developing an immersive approach based on the concept of “having a drink in a bar”. Two bars (Modern vs. Traditional ambiance) were settled with a few piece of furniture (counter, tables and bar stools) made in raw wood for the Traditional bar and in blue retro-lighted translucent plastic for the Modern bar. A video-clip was projected on one wall: Red moving shapes associated to a “far west” music in the Traditional bar, and Blue moving bubbles associated to an “electro” music in the Modern bar. In each bar, 100 participants were asked which be…
XIII Congreso Iberoamericano de Economía del Deporte. Los eventos deportivos: impacto, turismo y tecnología
2023
En este libro se recogen las aportaciones realizadas por los participantes en el XIII Congreso Iberoamericano de Economía del Deporte celebrado en la ciudad de Valencia durante los días 7, 8 y 9 de junio de 2023. This book compiles the contributions made by the participants in the XIII Ibero-American Congress on Sport Economics held in the city of Valencia on June 7, 8 and 9, 2023.
Quels risques pour les aides à domicile : prise de conscience et précaution pour une meilleure santé et sécurité au travail
2013
National audience; Xe colloque francophone sur le risque
Incentives, Service Quality, and Regulation: An Application to the Airline Industry
2012
El sector aéreo presenta interesantes retos para el investigador. Se trata de un sector complicado debido, entre otras características, a las siguientes: escasos márgenes de beneficios, elevadas barreras de entrada y salida, alta sensibilidad a ciclos económicos, y la regulación y competencia. Desde los años 90, Europa ha vivido un proceso de desregulación en el tráfico aéreo. Ello ha supuesto una reorganización de las redes desde rutas completamente conectadas (fully-connected) hacia redes con aeropuertos base (hub-and-spoke). No debemos olvidar que sobreviven mercados que están regulados de acuerdo con la calificación de “obligación de servicio público” – en España tenemos el caso de las …
Cross-Linked Imidazolium Salts as Scavengers for Palladium.
2014
Five imidazolium-based materials have been synthesised and used for the first time as palladium scavengers. Radical reactions of suitable bis-vinylimidazolium salts led to a series of insoluble materials through homo-polymerisation, immobilisation with a 3-mercaptopropyl-modified silica gel or co-polymerisation with ethylene glycol dimethylacrylate. These materials were screened as palladium scavengers with a set of palladium(0) and palladium(II) compounds in different solvents and at different starting amounts of palladium. In many cases, residual amounts of palladium were lower than 5 ppm, as requested for the manufacture of active pharmaceutical ingredients and fine chemicals. The applic…
Dual stereocontrolled alkylation of aldehydes with polystyrene-supported nickel complexes derived from α-amino amides
2015
Nickel(II) complexes derived from α-amino amide ligands anchored to gel-type and monolithic polymers act as efficient catalysts for the enantioselective addition of dialkylzinc reagents to aldehydes. Similar to the analogous homogeneous systems, dual stereocontrol in addition products can be achieved by controlling the stoichiometry of the immobilized nickel complex. Aromatic and aliphatic aldehydes were alkylated in good yields with enantioselectivities comparable to those obtained with the homogeneous analogues. These polymer-supported catalysts offer significant advantages as no metal leaching is observed and they can be easily recovered from the reaction mixture by simple filtration and…
“Release and catch” catalytic systems
2013
In this perspective article the “release and catch” catalytic system concept is discussed. A “release and catch” catalytic system is prepared by non-covalent immobilization of the catalytic moiety on a suitable support, but differently from the usual non-covalently supported catalyst, the catalytic moiety is released in solution over the course of the reaction and it is recaptured at the end of the reaction. Such a “catalyst- sponge like” or “boomerang” system allows one to combine the benefits of homogeneous and heterogeneous catalysis and can be applied to organometallic-based catalysts, organocatalysts and metal-based catalysts.
Enantioselective transport of amino acid through supported chiral liquid membranes
1993
Abstract Two chiral alcohols, nopol and (2S)-(−)-methyl-1-butanol, immobilized in the pores of a polyethylene film were used for the anantioselective transport of amino acid hydrochloride. The degree of stereoselectivity of the permeation process varied from 0.39 to 1.52 depending on both the type of the chiral membrane phase and the properties of the amino acid. The evaluation of the membrane ability to separate stereoisomers was performed by the step-by-step analysis by considering the effect of amino acids' hydrophobicity, polarity and degree of chirality. For the purpose of this paper, the chirality measure was introduced. It was demonstrated that the enantioselectivity was affected mai…
La resistenza di interfaccia calcestruzzo poroso-terreni a grana fina per il consolidamento di pendii mediante trincee drenanti profonde
2022
Le trincee drenanti profonde rappresentano uno dei metodi più efficaci per la mitigazione del rischio da frana, in pendii con falda idrica. Esse sono realizzate mediante pannelli o pali secanti. Il riempimento è costituito di calcestruzzo poroso o materiale granulare. Se le trincee sono adeguatamente “innestate” nel terreno stabile e il materiale di riempimento ha sufficiente resistenza e rigidezza come il calcestruzzo poroso, si ha ulteriore in-cremento di resistenza a taglio per effetto shear keys, oltre a quello derivante dalla riduzione delle pressioni in-terstiziali. L’incremento di resistenza è dovuto sia alla resistenza all’interfaccia calcestruzzo–terreni sia a quella intrinseca del…
Intra-Acting Food Citizenship in Community-Supported Agriculture in Finland
2023
Citizens are called upon to become active participants in creating a more sustainable food system. As food citizens, people participate in defining and constructing their food systems according to their needs and values. In food policies, the concept of food citizenship is often left undefined or with reference only to individual activities. In the food citizenship literature, the role of nonhuman agency in constituting food citizenship needs more examination. Here we investigate food citizenship activities in a citizen-led community-supported agriculture group and explore the role of materiality in constituting food citizenship. We ask (1) what is the role of material-discursive arrangemen…