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See detailLa passion du philosophe
Durand, Pascal ULg

Article for general public (1995)

Compte rendu de La Passion de l'origine. Recherches sur l'esthétique transcendantale et la phénoménologie, de Daniel Giovannangeli (Paris, Galilée, 1995)

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See detailL'avenir du Petit Prince
Bodson, Arthur ULg

Speech (1995)

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See detailExtraction and partial purification of tomato leaves hydroperoxide lyase
Fauconnier, Marie-Laure ULg; Lecoq, S.; Marlier, M.

Poster (1995, September 27)

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See detailAdsorption behavior of polymers with ionic end groups : mono- and difunctional polystyrenes in toluene
Pankewitsch, T.; Vanhoorne, Pierre ULg; Jérôme, Robert ULg et al

in Macromolecules (1995), 28(20), 6986-6992

The adsorption behavior of mono- and difunctional telechelic polymers, omega- and alpha,omega-sulfonato polystyrenes, from dilute toluene solution on the surface of a silicon wafer is investigated by ... [more ▼]

The adsorption behavior of mono- and difunctional telechelic polymers, omega- and alpha,omega-sulfonato polystyrenes, from dilute toluene solution on the surface of a silicon wafer is investigated by ellipsometry. Polystyrene without ionic end groups does not adsorb, and the attachment of molecules to the silicon dioxide surface proceeds via the functional ionic ends. Already a single ionic group promotes adsorption, and adsorption kinetics at small times is found to be diffusion limited. The approach of an equilibrium adsorbed amount at later times is controlled by the hindered diffusion of chains through the already existing layer. With monofunctional chains a thin stable monolayer at the surface is formed. With difunctional chains there is strong indication for coupling of ionic ends and the formation of additional layers. It is caused by the interaction of dangling ends, when only one end of the chains is adsorbed at the surface. The molecular weight dependence of the grafting density is consistent with scaling predictions, and differences in the adsorbed amount of telechelics with different counterions are explained on the basis of different valencies. [less ▲]

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See detailEtude in situ de la dynamique de la défense du nid par le mâle territorial (agressions interspécifiques) chez Symphodus (C.) ocellatus (Forsskål, 1775), poisson labridé méditerranéen
Ylieff, Marc ULg

Master's dissertation (1995)

Approche descriptive et expérimentale des comportements que le mâle territorial nidificateur produit pour protéger son frai vis-à-vis d'autres poissons labridés et des mollusques qui peuplent son nid ... [more ▼]

Approche descriptive et expérimentale des comportements que le mâle territorial nidificateur produit pour protéger son frai vis-à-vis d'autres poissons labridés et des mollusques qui peuplent son nid. Etude réalisée en plongée sous-marine à Stareso, Calvi (Corse). [less ▲]

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See detailSmall-angle neutron scattering studies of low-polarity telechelic ionomer solutions. 1. Total scattering
Karayianni, Eleni; Jérôme, Robert ULg; Cooper, Stuart L

in Macromolecules (1995), 28(19), 6494-6507

The overall structure and thermodynamic interactions that take place,in low-polarity ionomer solutions have been investigated via the technique of small-angle neutron scattering for two Na-neutralized ... [more ▼]

The overall structure and thermodynamic interactions that take place,in low-polarity ionomer solutions have been investigated via the technique of small-angle neutron scattering for two Na-neutralized carboxy-telechelic polystyrene model ionomer systems that differ in the length of the polymer backbone. The strong interchain association that is evidenced in the viscometric measurements of the ionomers compared to the ester forms is apparent in the scattering profiles of the ionomers that show a characteristic upturn that extends in the low-q regime and increases with increasing polymer concentration. The apparent molecular weight and size of the aggregated particles show a significant increase over a small concentration range, while the ionic content seems to not affect the degree of association in the concentration regime studied. The supramolecular structure of the ionomer solutions is revealed by fitting the scattering data to a scaling law in the intermediate qR(g) regime that supports a percolation type of behavior for the ionomer clusters for both systems studied. The fractal dimension of the aggregates is 1.76 for both ionomer systems which provides evidence for a rather extended configuration and high polydispersity of the clusters in solution. The molecular weight of the associating particles is observed to rapidly approach infinity with increasing polymer concentration, indicating the approach to a gel transition. The scattering data of the ionomer solutions were fitted to the de Gennes model based on the random-phase approximation theory. The Flory-Huggins interaction parameter of the ionomer solutions determined using this model shows a strong concentration dependence with a quite unexpected increase with decreasing polymer concentration. The thermodynamic interactions in the ionomer solutions were changed dramatically by the association as revealed by a significant decrease of the second virial coefficient. [less ▲]

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See detailSurface Molecular Structure of Self-Assembled Alkanethiols Studied by Electron Spectroscopies
Duwez, Anne-Sophie ULg; Riga, J.; Ghijsen, J. et al

Conference (1995, September 10)

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See detailL'UEO et la politique européenne de défense
Dumoulin, André ULg

in Problèmes politiques et sociaux (1995), (754),

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See detailA model of spinal cord injury: the balloon-compressive model
Martin, Didier ULg; Franzen, R.; Robe, Pierre ULg et al

Conference (1995, September 03)

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See detailAnalyse morphologique par microscopie à force atomique de films minces de copolymères et de mélanges de polymères
Leclère, P; Viville, P; Lazzaroni, R et al

Conference (1995, September 02)

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See detailHypertension artérielle et résistances vasculaires
Krzesinski, Jean-Marie ULg; Rorive, Georges ULg

in Revue Médicale de Liège (1995), 50(9), 365-372

L'anomalie hémodynamique caractéristique de l'hypertension artérielle est l'augmentation des résistances vasculaires. Ces résistances siègent principalement au niveau de petites artères et d'artérioles ... [more ▼]

L'anomalie hémodynamique caractéristique de l'hypertension artérielle est l'augmentation des résistances vasculaires. Ces résistances siègent principalement au niveau de petites artères et d'artérioles précapillaires de diamètre inférieur à 300Il et sont le résultat de modifications essentiellement anatomiques. La média est de loin la couche la plus épaisse de la paroi de ces vaisseaux caractérisés,au stade d'hypertension chronique, par un rapport épaisseur de média sur lumière accru. Contrairement à l'animal hypertendu, cette modification est, chez l'homme, liée à un remodelage vasculaire (réarrangement cellulaire sans vraie hypertrophie ou hyperplasie), en relation avec une anomalie endothéliale (réduction de production de monoxyde d'azote, augmentation de production d'endothéline-l). L'intérêt pour ces modifications structurelles réside dans l'espoir d'influencer favorablement ces lésions notamment par des traitements spécifiques. Récemment, une étude canadienne a rapporté qu'un inhibiteur de l'enzyme de conversion, à même efficacité antihypertensive qu'un bêtabloquant, était seul capable de normaliser les anomalies structurelles de la média et de corriger (partiellement) la dysfonction endothéliale caractérisant également l'hypertendu après 27ms de traitement (étude chez l'homme, à partir de biopsies répétées de tissu sous-cutané, selon la technique proposée par les groupes de Heagerty et Mulvany). Cette observation jointe aux données expérimentales et à quelques données humaines suggère que les inhibiteurs de l'enzyme de conversion posséderaient bien des propriétés indépendantes de leur effet antihypertenseur permettant une correction des anomalies vasculaires dans l'hypertension. Ces travaux méritent cependant une confirmation sur un grand nombre de patients. Ils ont l'intérêt d'ajouter une note explicative pathogénique aux bénéfices déjà observés en épidémiologie dans la décompensation cardiaque, l'infarctus myocardique ou la protection rénale lors de l'utilisation de ces molécules. [less ▲]

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See detailThe kinetic growth anisotropy of the 123-(RE)BaCuO compounds
Vandewalle, Nicolas ULg; Ausloos, Marcel ULg

in Philosophical Magazine A (1995), 72(3), 727-736

The kinetic growth anisotropy of the melt-textured 123-(RE)BaCuO compounds, especially along the CuCO2 planes, is discussed here in detail. A computer model which simulates the grain growth of 123 ... [more ▼]

The kinetic growth anisotropy of the melt-textured 123-(RE)BaCuO compounds, especially along the CuCO2 planes, is discussed here in detail. A computer model which simulates the grain growth of 123 materials in the ab plane is presented. This kinetic growth model takes some bond anisotropy along the [100] and [110] directions into account. The model presented herein belongs to a hierarchical set of generalized Eden models as discussed in the Appendix. For different bond anisotropy parameters, the simulated 123-(RE)BaCUO grains exhibit square and octogonal overall shape which have been both optically observed. From simple kinetic arguments, we show that the 'faceting' of the 123-(RE)BaCuO grains finds its origin in a bond anisotropy rather than in a growth-rate anisotropy along some crystallographic directions. This is of general interest and opens new perspectives for developing the Eden model in the crystal-growth field. [less ▲]

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See detailATP-sensitive K+ channels and insulin release: effect of BPDZ 62
Lebrun, P.; Antoine, M. H.; Ouedraogo, R. et al

Poster (1995, September)

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See detailPharmacological study of new potassium channel openers (3- and 4-substituted 4H-pyrido[4,3-e]-1,2,4-thiadiazine 1,1-dioxides) on pancreatic and vascular tissues
Fontaine, J.; Maranca, F.; Vladut-Vasilan, C. et al

Poster (1995, September)

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See detailActivation of potassium channels in human and rodent B-cells by BPDZ-44 and BPDZ-62; mechanisms of action and effects in human neonatal nesidioblastosis
Kane, C.; Harding, E. A.; Antoine, M. H. et al

Poster (1995, September)

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See detailTime Extended LOTOS
Léonard, Luc; Leduc, Guy ULg

Report (1995)

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