O potencial pedagógico da Hora do Conto para o desenvolvimento da Comunicação Oral

O presente relatório é produto de um projeto de investigação que pretendeu caracterizar a adequação e dinamização da hora do conto com a finalidade de promover o desenvolvimento da comunicação oral, implementada numa sala de 3/4 anos e a adequação didática de um processo de intervenção educativa de estratégias para a promoção do desenvolvimento da Oralidade (incidindo na dinamização da hora conto) implementado numa turma de 3.º ano do 1.º Ciclo do Ensino Básico. Tendo consciência da desvalorização que é atribuída à temática em análise, acreditamos que os profissionais de educação se tornam responsáveis pelo desenvolvimento e aperfeiçoamento das capacidades de comunicação das crianças/alunos. Neste sentido, consideramos que foi extremamente importante investir neste domínio e nas competências a ele associado, nas vertentes de compreensão e expressão orais. Para atingir os objetivos delineamos, planificamos, construímos, aplicamos e avaliamos em sala de aula, um conjunto de intervenções educativas adotando como estratégia principal a dinamização da hora do conto. Assim sendo, podemos verificar através dos resultados obtidos, que efetivamente, a hora do conto e a utilização de diferentes estratégias para a dinamização da mesma, contribuíram positivamente para o desenvolvimento das competências orais dos intervenientes, potenciando melhorias, a vários níveis, nomeadamente na vertente de compressão e de expressão oral dos dois grupos de aplicação.This report is the product of a research project that aimed to characterize the adequacy and dynamization of the story time with the purpose of promoting the development of oral communication, implemented in a 3/4 year classroom and the didactic adequacy of a process of educational intervention strategies to promote the development of Orality (focusing on the dynamization of the story time) implemented in a 3rd year class of the 1st Cycle of Basic Education. Being aware of the devaluation that is attributed to the theme under analysis, we believe that education professionals become responsible for the development and improvement of communication skills of children/students. In this sense, we believe that it was extremely important to invest in this field and in the skills associated with it, in the areas of understanding and oral expression. In order to achieve the objectives, we delineate, plan, build, apply and evaluate in the classroom, a set of educational interventions adopting as the main strategy the dynamization of the story time. Therefore, we can verify through the results obtained, that effectively, the story time and the use of different strategies for the dynamization of the tale, contributed positively to the development of the oral skills of the participants, enhancing improvements, at various levels, particularly in the compression and oral expression of the two groups of application. Keywords: Oral Communication; Compression and Oral Expression; Story Time; Pre-School; 1st Cycle of Basic Education

Hydrogen, energy carrier of the future ?

INGENIERIE+NOGNon

Kinetic study of the reactivity of lignin model compounds towards H-transfer hydrogenolysis under hydrothermal conditions

SSCI-VIDE+ING+NOG:YSCInternational audienceThis work presents kinetic studies on the hydrogenolysis of eight lignin model compounds emulating various C-O and C-C linkages under hydrothermal conditions. Reaction rate constants and apparent activation energies of bond cleavage were determined, allowing ranking the bonds reactivity. Keywords: lignin model compounds; hydrogenolysis; kinetic study

Wet impregnation of alumina-washcoated monoliths: Effect of the drying procedure on Ni distribution and on autothermal reforming activity

International audienceThe complete preparation procedure of catalytic cordierite monoliths has been studied, from the washcoating with alumina to the deposition of Ni by wet impregnation. The effect of drying (oven, room temperature or microwaves drying) on Ni distribution was investigated by SEM, TEM, XPS and surface area measurements. The use of γ-Al2O3 suspensions of suitable particles size allows a faster alumina loading and the deposition of a washcoat layer with better adhesion properties than those obtained with boehmite precursors. The Ni distribution is strongly influenced by drying method applied to wet-impregnated monoliths. At a macroscopic scale, the Ni distribution is more homogeneous after microwaves or room temperature drying. At a microscopic scale, there is a surface enrichment of the washcoat in Ni, whatever the drying method applied. In all catalysts, the Ni is present in two forms: it is predominantly incorporated in a Ni-alumina spinel phase, but some large metal particles (10–20 nm) are also present, in a larger extent in the monoliths dried by microwaves and oven procedures. All monoliths deactivate slowly with time on stream during ATR of isooctane, but the oven-dried monoliths deactivate more markedly. Amorphous carbon film and whiskers were identified on all catalysts. The deactivation is not directly related to the total amount of deposited coke, but rather to the type of carbon and to Ni dispersion at both microscopic (large/small Ni particles) and macroscopic (axial Ni distribution in the channels) scales

hydrothermal conversion of linoleic acid and ethanol for biofuel production

SSCI-VIDE+ING+YSC:NOGInternational audienceProducing renewable fuels from biomass is an important challenge to meet the European targets of 20% renewable energy by 2020, with a minimum of 2% for transportation energy needs [ ]. Fatty acid methyl esters (FAMEs) produced by trans-esterification of vegetable oils can be blended with mineral Diesel fuel, but their direct utilization in thermal engines presents some drawbacks related to their oxygen content. Another approach to fatty acids valorisation as biofuels consists in their deoxygenation into pure hydrocarbons. In the present study, the hydrothermal conversion of linoleic acid, a C18 fatty acid, into heptadecane (C17H36) in water/ethanol mixtures using a Pt/C catalyst was investigated. Based on products distribution and kinetic studies, a reaction scheme and a kinetic model are proposed