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See detailDifferences in local versus systemic TNF alpha production in COPD: inhibitory effect of hyaluronan on LPS induced blood cell TNF alpha release
Dentener, M. A.; Louis, Renaud ULg; Cloots, R. H. E. et al

in Thorax (2006), 61(6), 478-484

Background: Chronic obstructive pulmonary disease (COPD) is characterised by both airway inflammation and systemic changes. To elucidate the relationship between local and systemic inflammation, tumour ... [more ▼]

Background: Chronic obstructive pulmonary disease (COPD) is characterised by both airway inflammation and systemic changes. To elucidate the relationship between local and systemic inflammation, tumour necrosis factor alpha (TNF alpha) production by sputum cells and blood cells of patients with COPD and controls was compared and the effect of the extracellular matrix compound hyaluronan (HA) on TNF alpha release was studied. Methods: Four study groups were included: 10 steroid free COPD patients, 8 steroid treated patients, 10 healthy smokers, and 11 healthy non-smokers. Sputum cells and blood were incubated for 24 hours with or without lipopolysaccharide (LPS) in the absence or presence of HA (122 kDa or HMW fragment). TNF alpha was measured by ELISA. Results: Sputum cells produced spontaneously high levels of TNF alpha but were unresponsive to LPS. Sputum cells from COPD patients (both steroid free and steroid treated) produced significantly less TNF alpha than cells from healthy non-smoking subjects (p = 0.017 and p = 0.001, respectively). In contrast, blood cells produced TNF alpha only in response to LPS. No differences were observed in TNF alpha production by blood cells between the patient groups and the control groups. HA (both fragments) partially blocked LPS (1 ng/ml) induced TNF alpha release by blood cells from all study groups, whereas TNF alpha production by sputum cells was not influenced by HA. Conclusion: These data indicate a difference between local and systemic TNFa production. Sputum cells of patients with COPD produced less TNFa than controls, which could contribute to impaired local defence. An inhibitory effect of HA on TNF alpha release in blood cells was observed which was similar in both patients and controls. [less ▲]

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See detailDifferences in locomotor activity in two syntopic spadefoot toad species (genus Pelobates)
Székely, Diana; Denoël, Mathieu ULg; Székely, Paul et al

Poster (2013, August 25)

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See detailDifferences in neural activation following expression of appetitive and consummatory male sexual behavior in the quail brain
Taziaux, Mélanie ULg; Cornil, Charlotte ULg; Dejace, C. et al

in Hormones & Behavior (2005, June), 48(1), 130

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See detailDifferences in perceptions and evaluation criteria among groups influencing industrial buying decisions
Choffray, Jean-Marie ULg; Lilien, Gary L.

in Maloney, J.; Silverman, B. (Eds.) Attitude Research Plays for High Stakes (1979)

The measurement of perceptual and evaluation differences among groups of individuals involved in organizational buying provides new input for product positioning and for communications strategies. This ... [more ▼]

The measurement of perceptual and evaluation differences among groups of individuals involved in organizational buying provides new input for product positioning and for communications strategies. This paper provides a non technical overview of a measurement and analysis methodology aimed at treating these group differences and using the results to develop relevant marketing strategies. [less ▲]

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See detailDifferences in serum trace elements concentration in osteoporotic and age-matched comparison patients: preliminary results
Strause, LG; Reginster, Jean-Yves ULg; Franchimont, P et al

in Journal of Bone and Mineral Research (1986), 1(S1), 234

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See detailDifferences in species–area relationships among the major lineages of land plants: a macroecological perspective
Patino Llorente, Jairo ULg; Weigelt, P.; Guilhaumon, F. et al

in Global Ecology & Biogeography (2014), 23

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See detailDifferences in the structural and magnetic properties of nanosized barium hexaferrite powders prepared by single and double microemulsion techniques
Koutzarova, T.; Kolev, S.; Ghelev, Ch et al

in Journal of Alloys & Compounds (2013), 579

Barium hexaferrite powders of nanometer particle size synthesized via two variants of the microemulsion technique, namely, single microemulsion and double microemulsion, were studied. The influence was ... [more ▼]

Barium hexaferrite powders of nanometer particle size synthesized via two variants of the microemulsion technique, namely, single microemulsion and double microemulsion, were studied. The influence was explored of the type of microemulsion technique on the microstructure and on the magnetic properties of the barium hexaferrite powders. The average particle size of the barium hexaferrite powders was in the range from 110 nm to 442 nm depending on the method and conditions of synthesis. The particles with size below 150 nm had irregular shapes between spherical and platehexagonal; the bigger ones had an almost perfect hexagonal shape. The powders obtained by single microemulsion had better magnetic characteristics (saturation magnetization of 65.12 emu/g and coercivity field of 3.6 × 105 A/m) than those obtained by double microemulsion. © 2013 Elsevier B.V. All rights reserved. [less ▲]

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See detailDifférences individuelles et effets d'agrégation en ce qui concerne les performances en lecture : Analyse secondaire des données PISA 2000
Crahay, Marcel ULg; Monseur, Christian ULg

in Houssemand, C.; Martin, R.; Dickes, P. (Eds.) Perspectives de psychologie différentielle (2006)

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See detailDifférences interindividuelles dans la propension aux faux souvenirs
Willems, Sylvie ULg; Van der Linden, Martial ULg

in Brédart, Serge (Ed.) Souvenirs récupérés, souvenirs oubliés et faux souvenirs (2004)

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See detailDifférences intra- et inter-races du profil en acides gras du lait
Soyeurt, Hélène ULg; Dardenne, Pierre; Lognay, Georges ULg et al

in 11ème Carrefour des Productions Animales (2006, January 25)

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See detailDifférences liées au sexe : l'école en relation avec son environnement
Lafontaine, Dominique ULg; Blondin, Christiane ULg

in Actes du XVIe colloque international de l'Admée-Europe, Liège, 4-6 septembre 2003 (2004)

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See detailLes différences sexuées dasn les trajectoires professionnelles. A qui la faute ?
Gavray, Claire ULg

Conference given outside the academic context (2005)

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See detailDifférences socio-culturelles et éducation optimisée en milieu scolaire de deux à 7-8 ans
de Landsheere, Gilbert ULg; Jehin, Monique ULg; Boxus, Elise ULg et al

in De la stimulation compensatoire à une pédagogie rénovée : le handicap socio-culturel chez l'enfant (1975)

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See detailDifférenciatio, génétique et morphologique du mulot, Apodemus sylvaticus, dans le bassin méditerranéen occidental
Michaux, J.R.; Libois, Roland ULg; Fons, Roger

in Vie et milieu (1996), 46(3-4), 192-203

Many questions are still unanswered about the biogeography and the origin of the wood mouse in the Mediterranean area, namely on the islands where some giant forms are described. In order to characterize ... [more ▼]

Many questions are still unanswered about the biogeography and the origin of the wood mouse in the Mediterranean area, namely on the islands where some giant forms are described. In order to characterize the genetic structure of these insular populations and the level of morphological differentiation, 232 animals originating from 30 localities situatid on several wester Mediterranean islands and on the continent, either along the sea coast or more inlabd, were trapped. Their skulls were measured and their mtDNA purified and analysed by RFLP techniques. The wood mice living on small islands are generally bigger than their relatives living on the continent whereas the size of those living on larger islands is quite the same. This kind of insular gigantism ought to be more an adaptive response to peculiar insular environmental conditions (particularly a lower predation pressure) than a consequence of a founder effect. The mtDNA of the wood mice from north eastern Spain belongs to the previously identified northwestern group. Consequently, the Pyrenees are not a biogeographic barrier to the wood mouse. The Sicilian mice, which are genetically different from all the other west European or north African animals, are morphologically similar to the Sardinia and Italian ones. [less ▲]

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See detailDifférenciation altitudinale de Senecio inaequidens (Asteraceae) lors de son invasion en Europe
Monty, Arnaud ULg; Mahy, Grégory ULg

in Invasions biologiques et traits d'histoire de vie (2007)

Senecio inaequidens DC. (Asteraceae) est une plante invasive originaire d’Afrique du Sud et du Lesotho. Introduite involontairement par l’industrie lainière il y a environ un siècle, dans des zones ... [more ▼]

Senecio inaequidens DC. (Asteraceae) est une plante invasive originaire d’Afrique du Sud et du Lesotho. Introduite involontairement par l’industrie lainière il y a environ un siècle, dans des zones indépendantes et connues, elle s’est répandue à travers l’Europe de l’ouest. Des collectes de graines et des mesures in situ ont été menés le long de deux gradients altitudinaux et climatiques, passant par les zones d’introduction de Belgique et du sud de la France (respectivement 8 et 10 populations). Dix individus parents, par population, ont été échantillonnés. Dix graines par individu parent ont été semées en pots, et une plantule a été gardée, dans un jardin expérimental homogènes, à Gembloux (Belgique). Ceci afin d’étudier les éventuelles différenciations génétiques le long des gradients climatiques. Les données collectées concernent la germination, la phénologie de la floraison, la croissance (hauteur, biomasse) et le succès reproducteur. Une relation entre la plupart des traits d’histoire de vie étudiés et l’altitude a été montrée pour le gradient français, reflétant une différenciation adaptative de l’espèce au cours de l’invasion. Les plants de basse altitude (région méditerranéenne) tendent à germer plus tôt, à être plus grand, à fleurir à un âge plus avancé et à allouer plus de ressources à la croissance qu’à la reproduction. In situ, un patron altitudinal similaire est observé pour la hauteur et la biomasse. Les résultats du gradient belge sont aussi comparables pour les traits relatifs à la croissance, mais moins marqués. Ceci est à mettre en relation avec une moins grande différence d’altitude, des climats moins contrastés et un flux de gènes potentiellement plus important le long du gradient de colonisation belge. [less ▲]

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