References of "Willems, Isabelle"
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See detailStudy of photocatalytic decomposition of hydrogen peroxide over ramsdellite-MnO2 by O2-pressure monitoring
Páez Martínez, Carlos ULg; Liquet, Dimitri ULg; Calberg, Cédric ULg et al

in Catalysis Communications (2011), 15

The catalytic and photocatalytic activities of ramsdellite type manganese oxide, R-MnO2 were studied from the initial rate of decomposition of H2O2 in aqueous solution. The kinetic study was followed by ... [more ▼]

The catalytic and photocatalytic activities of ramsdellite type manganese oxide, R-MnO2 were studied from the initial rate of decomposition of H2O2 in aqueous solution. The kinetic study was followed by the production of O2 via gas pressure monitoring (O2-monitored method), in the dark and under visible light irradiation (λ≥400 nm), at 20 °C. Experimental data showed that the rate of H2O2 decomposition, under visible light irradiation and in the dark, obeys the first order kinetic law.While in the dark the H2O2 decomposition rate bymass unit was around 6.88 mmol g−1 s−1, under visible light irradiation theH2O2 decomposition rate achieved a maximal value of 15.13 mmol g−1 s−1. The increase in the H2O2 decomposition, by effect of the visible light, was observed in ranges of catalyst concentrations from 16 to 374 mg L−1. These results reflect the potential of R-MnO2 as a photoactive catalyst, being a consequence of presumed photoreduction of Mn4+centers. [less ▲]

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See detailL'intégration par les jeunes des stéréotypes sexistes véhiculés par les médias
Dizier, Céline; Nibona, Marjorie; Willems, Isabelle et al

Report (2007)

Le rapport analyse la manière dont les stéréotypes sexistes sont diffusés dans les médias, notamment par les situations et par l'image. Il présente également une enquête sur les jeunes pour percevoir la ... [more ▼]

Le rapport analyse la manière dont les stéréotypes sexistes sont diffusés dans les médias, notamment par les situations et par l'image. Il présente également une enquête sur les jeunes pour percevoir la façon dont ces stéréotypes sont intégrés ou mis en distance en fonction des pratiques de consommation médiatique mais aussi du contexte. [less ▲]

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See detailIntroduction : les racines de l'identité collective
Jacquemain, Marc ULg; Italiano, Patrick ULg; Heselmans, Frédéric ULg et al

in Fédéralisme - Régionalisme (2006), 6

The paper shows how social identity theory, which proposes a constructivist verion of identities, fits the case of national or regional identities. The texte pleas of a non essentialist approach of ... [more ▼]

The paper shows how social identity theory, which proposes a constructivist verion of identities, fits the case of national or regional identities. The texte pleas of a non essentialist approach of identities. [less ▲]

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