References of "2011"
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See detailDeterminant and Impact on Outcome of Exercise Pulmonary Hypertension in Asymptomatic Severe Aortic Stenosis.
Magne, Julien ULg; Donal, E; O'Connor, K et al

Conference (2011)

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See detailLymphangiogenesis and extracellular matrix remodeling
Erpicum, Charlotte ULg; Detry, Benoît ULg; Paupert, Jenny ULg et al

Poster (2011)

Lymphangiogenesis, the formation of new lymphatic vessels from preexisting ones, is an important biological process associated with diverse pathologies, such as metastatic dissemination and graft ... [more ▼]

Lymphangiogenesis, the formation of new lymphatic vessels from preexisting ones, is an important biological process associated with diverse pathologies, such as metastatic dissemination and graft rejection. Our laboratory has previously identified MMP2 as a key regulator of lymphangiogenesis in vitro and in vivo. However, the exact function of MMP2 in this process is yet unknown. The present work aims at elucidating the mechanisms of MMP2 action during lymphangiogenesis. MMP2 could either act as a growth factor activator or as a regulator of matrix remodeling. To address this question, we studied the effect of MMP2 on lymphangiogenesis in an novel in vitro model of sprouting cells from small aggregates (spheroids) seeded in a collagen gel. In this model, quantification of the lymphangiogenic response is performed through computerized methods allowing the measurement of the distance of migration, but also the evaluation of how the cell are migrating. We evaluated the impact of MMP2 blockage through the use of physiological (TIMP2) or chemical inhibitors or by downregulating its expression with specific siRNA. The importance of extracellular matrix composition is evaluated by embedding these spheroids into different matrices (matrigel versus collagen; pepsinized collagen versus native collagen; different collagen concentrations). Our results reveal a modification of cell migration through collagen gel after MMP2 inhibition. The utilization of DQ collagen and microscopy refractance confirmed the importance of MMP2 collagenoyitic activity for lymphangiogenesis. [less ▲]

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See detailProspects for harmonized biodiversity assessments using national forest inventory data
McRoberts, Ronald E.; Chirici, Gherardo; Winter, Susanne et al

in Chirici, Gherardo; Winter, Susanne; McRoberts, Ronald E. (Eds.) National Forest Inventories - contributions to Forest Biodiversity Assessments (2011)

After selection of the 13 biodiversity variables (Sect. 2.3) based on their importance and feasibility for assessment by NFIs, responses were solicited from participating countries regarding the degree to ... [more ▼]

After selection of the 13 biodiversity variables (Sect. 2.3) based on their importance and feasibility for assessment by NFIs, responses were solicited from participating countries regarding the degree to which the variables are now assessed. Two conclusions were evident: (1) most countries currently assess most of the variables, but (2) consensus is lacking on assessment methods and necessary field crew expertise, suggesting that harmonization would require emphasis on field operations. For each of the seven essential features into which the 13 variables were grouped, more detailed assessments were conducted. For forest categories, the conclusion was that the only major difference in classification systems used by European NFIs was whether potential or actual vegetation was used to define classes. Thus, the prospects for harmonization of forest categories are considered excellent. For forest structure, the prospects depend on the variable. For tree species, the prospects are excellent because the variable is assessed in the same manner by all NFIs. For dbh and height, considerable variability in measurementthresholds were found, but otherwise the harmonization prospects are good. For social position, definitions of classes varied, but harmonized estimates of proportions for dominant, intermediate, and suppressed classes are considered possible. Prospects for harmonized estimates of layers are consideraly poorer because of different definitions, thresholds and the uncertainty associated with visual assessment methods. Harmonized estimation of forest age is impeded by the increasing proportion of uneven-aged stands for which age is often not assessed, different definitions, and different assessment methods. However, agreement on dominant age as a reference definition would greatly increase the prospects. Deadwood is becoming an increasingly popular indicator of sustainable forest management. Unfortunately, considerable variability was found in deadwood definitions, components (e.g., stumps, limbs), sampling methods, and measurement thresholds. Thus, harmonized deadwood estimation will require development of bridges. Harmonization of regeneration estimates faces challenges due to differences in assessment approaches such as presence/absence versus coverage and all species versus dominant species. Harmonized estimation may be restricte to change in regeneration success. Harmonized estimation for ground vegetation also faces serious challenges due to differences in the components assessed (e.g., small trees, shrubs, herbs, bryophytes, lichens), difference in height thresholds, and differences in categories for which ground vegetation is reported. Forest naturalness integrates many of the other essential feature. However, many countries do not assess naturalness, and among those that do, assessment variables, methods, and reporting classes vary considerably. For harmonized assessment using NFI variables, the hemeroby approach, which emphasizes indications of human influence, is extremely sensitive to plot size. Harmonization using the ecosystem processes approach requires a common dbh threshold and similar plot sizes. The overall conclusion is that harmonization will be considerably easier for some essential features than for others. The factors leading to difficulties often are related to different definitions, different reporting classes, different measurement thresholds, and different features of sampling protocols such as plot sizes and configurations. Nevertheless, construction of reference definitions and bridges greatly facilitate harmonization for all essential features as is illustrated in Chap. 5. [less ▲]

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See detailHow they became the human face of climate change. Research and policy interactions in the birth of the ‘environmental migration’ concept.
Gemenne, François ULg

in Piguet, Etienne; Pécoud, Antoine; De Guchteneire, Paul (Eds.) Migration and Climate Change (2011)

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See detailLe chercheur comme entrepreneur de l’innovation inter-organisationnelle
Xhauflair, Virginie ULg; Pichault, François ULg

in SociologieS (2011)

Our study about the institutionalization process of social regulation practices emerging at the inter-organizational level led us to develop an action-research methodology of entrepreneurial nature. This ... [more ▼]

Our study about the institutionalization process of social regulation practices emerging at the inter-organizational level led us to develop an action-research methodology of entrepreneurial nature. This methodological choice gave rise to original and rich data, but simultaneously challenged our ability to analyze these data as well as our entrepreneurial role in a reflexive way. The central question of this paper is then twofold: on the one hand, can the researcher be an “entrepreneur”, and go beyond the simple production of knowledge? On the other hand, can the researcher with an entrepreneurial position produce scientific knowledge? We will answer these two questions thanks to two case studies, which will allow us to highlight various facets of acting as a “researcher-entrepreneur”. [less ▲]

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See detailQu'est-ce que la ponctuation? Définir son objet d'étude dans le cadre d'une recherche des rapports entre ponctuation et syntaxe dans la langue française médiévale
Mazziotta, Nicolas ULg

in Durrenmatt, Jacques; Dauvois, Nathalie (Eds.) La Ponctuation à la Renaissance (2011)

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See detailInferring internal anatomy from the trilobite exoskeleton: the relationship between frontal auxiliary impressions and the digestive system
Lerosey-Aubril, Rudy; Hegna, Thomas; Olive, Sébastien ULg

in Lethaia (2011), 44(2),

The digestive system of trilobites is rarely preserved. As a result, many aspects of its organization remain unknown. Fortunately, the exoskeleton sometimes preserves evidence of soft-tissue attachment ... [more ▼]

The digestive system of trilobites is rarely preserved. As a result, many aspects of its organization remain unknown. Fortunately, the exoskeleton sometimes preserves evidence of soft-tissue attachment sites that can be used to infer internal anatomy. Among them are the frontal auxiliary impressions (FAIs), probable soft-tissue insertion sites located on the fronto-median glabellar lobe of some trilobites. FAIs are herein described in the Carboniferous trilobite Phillipsia belgica Osmo´ lska 1970 – representing the only known example of such structures in the Proetida and their youngest occurrence. A taphonomic scenario is proposed to explain their variable preservation. Although particularly common in the Phacopina, FAIs or FAI-like structures are also found in several orders that differ greatly. Comparisons with modern analogues suggest that FAIs might represent attachment sites for extrinsic muscles associated with a differentiated crop within the foregut. A review of purported remains of the trilobite digestive system indicates that it usually consisted of a tube-like tract flanked by a variable number of metamerically paired diverticulae. Its anterior portion is not particularly individualized, except in a few specimens that might hint at the presence of a crop. This differentiation of a crop might have constituted a secondarily evolution of the foregut in trilobites, occurring independently in different clades. Accompanied by a strengthening of associated extrinsic muscles, this modification of the foregut might explain the presence of more conspicuous muscle insertion sites on the glabella. Study of FAIs might therefore provide new data on the anatomy of the foregut in trilobites and evidence of diverse feeding habits. [less ▲]

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See detailDiagnostic value of neurotrophin expression in malignant pleural effusions
DUYSINX, Bernard ULg; PAULUS, Aurore ULg; HEINEN, Vincent ULg et al

in Experimental and Therapeutic Medicine (2011), 2(5), 941-946

Neurotrophins (NTs) modulate the growth of human malignancies, including lung cancers. Our prospective study evaluated the accuracy of pleural NTs [nerve growth factor, brain-derived neurotrophic factor ... [more ▼]

Neurotrophins (NTs) modulate the growth of human malignancies, including lung cancers. Our prospective study evaluated the accuracy of pleural NTs [nerve growth factor, brain-derived neurotrophic factor (BDNF), neurotrophin 3 (nT3) and 4 (nT4)] levels for differentiating benign from malignant pleural exudates. Levels of NTs were measured by ELISA in 170 patients with non-neutrophilic (<50%) exudative benign or malignant pleurisies diagnosed by pleuroscopy. Fifty-nine benign (9 infections and 50 inflammatory diseases) and 111 malignant (50 extrathoracic tumors, 51 lung cancers and 10 mesotheliomas) pleural exudates were diagnosed by thoracoscopy. Levels of BDNF were significantly higher in malignant than in benign effusions [17 pg/ml (0-367) vs. 8 pg/ml (0-51), p<0.05]. ROC analysis showed an area under the curve of 0.609 (p=0.012; best threshold 44 pg/ml). Pleural BDNF levels were significantly higher in pleural metastasis of pulmonary tumors and in mesothelioma than in pleural benign effusions. Finally, a higher proportion of pleural nT3 was detected in squamous cell lung carcinoma in comparison to that in non-squamous cell lung carcinoma (72.7 vs. 10%, p<0.0001). NTs and particularly BDNF may play a role in the pathogenesis of malignant pleural effusions. [less ▲]

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See detailPièces tissées et musiciens : à propos d'ARM XIX 321
Colonna d'Istria, Laurent ULg

in Nouvelles Assyriologiques Brèves et Utilitaires (2011)

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See detailLa gestion de la diversité dans les entreprises et les organisations
Cornet, Annie ULg

Conference (2011)

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See detailLa résolution des problèmes concrets de coordination en situation extrême: essai de synthèse
Bouty, Isabelle; Drucker-Godart, Carole; Godé, Cécile et al

in Revue Management et Avenir [= RMA] (2011), 41

Nos analyses suggèrent que les pratiques de coordination déployées par les acteurs dans ce type de contexte s’articulent autour de quatre composants de base: 1° elles s’appuient sur des standards; 2° ... [more ▼]

Nos analyses suggèrent que les pratiques de coordination déployées par les acteurs dans ce type de contexte s’articulent autour de quatre composants de base: 1° elles s’appuient sur des standards; 2° elles s’accompagnent d’un travail de construction collective de sens; 3° des choix sont opérés en permanence sur la distribution des rôles et activités entre acteurs et posent la question du pouvoir et du leadership; 4° ces pratiques s’inscrivent dans des temporalités structurées. [less ▲]

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See detailDie Narrenburg im Waldwinkel. Theodor Storms Auseinandersetzung mit Adalbert Stifter
Leyh, Valérie ULg

in Sprachkunst. Beiträge zur Literaturwissenschaft (2011), 42(1), 1-28

Comme l'ont déjà évoqué plusieurs chercheurs, la nouvelle "Waldwinkel" (1874) de Theodor Storm montre de nombreuses correspondances avec le récit "Die Narrenburg" (1842) d'Adalbert Stifter. Or jusqu'à ... [more ▼]

Comme l'ont déjà évoqué plusieurs chercheurs, la nouvelle "Waldwinkel" (1874) de Theodor Storm montre de nombreuses correspondances avec le récit "Die Narrenburg" (1842) d'Adalbert Stifter. Or jusqu'à présent, ce rapport étroit entre ces deux textes narratifs n'a pas encore été étudié en profondeur. Cet article vise dès lors à analyser les continuités et discontinuités entre ces deux récits. Une étude minutieuse des stratégies narratives ainsi qu'une analyse comparative des personnages principaux permettent de constater que la nouvelle de Storm fait, certes, renaître le monde de Stifter, mais pour le faire apparaître comme un non-lieu, une utopie. La noblesse, qui chez Stifter parvient encore à se renouveler en s'alliant à la bourgeoisie, est ainsi, chez Storm, vouée au déclin. Le monde représenté dans "Waldwinkel" est, quant à lui, marqué par la réalité du capitalisme et du combat de tous contre tous. [less ▲]

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See detailSeasonal variations in vitamin D levels in melanoma patients : a single-centre prospective pilot comparative study
FAILLA, Valérie ULg; CAVALIER, Etienne ULg; EL HAYDERI, Lara ULg et al

in Journal of the European Academy of Dermatology & Venereology (2011)

Background: More than 90% of vitamin D synthesis is dependent on UV exposure. Photosensitive disorders such as lupus erythematosus, protoporphyria and xeroderma require strict sun avoidance, and vitamin D ... [more ▼]

Background: More than 90% of vitamin D synthesis is dependent on UV exposure. Photosensitive disorders such as lupus erythematosus, protoporphyria and xeroderma require strict sun avoidance, and vitamin D deficiency has been demonstrated in these patients. Melanoma patients are also instructed to avoid sun exposure and may hence be expected to be vitamin D deficient. Materials and method : Winter and summer vitamin D levels were compared in a group of melanoma patients (n=61) and age- and phototype-matched controls (n=53) without photosensitive disorders. Results : Oral supplementary vitamin D intake was reported in 32.7% of the melanoma patients and in 15.1 % in the control group. Despite oral supplementation, only 25% of the melanoma patients and the controls presented with vitamin D levels of 30 ng/mL or higher. In non-supplemented subjects in the melanoma and control groups, respectively, mean winter vitamin D levels were below the recommended threshold at 12,6 ng/mL vs 13.2 ng/mL, respectively, but not statistically different. These values increased significantly in both groups during the summer to 24.6 and 23.8 ng/mL respectively. Conclusion: Unexpected, significant increases in vitamin D levels were seen in melanoma patients during summer, suggesting non-adherence with photoprotective measures and reflecting a heliophilic behaviour. Vitamin D supplementation is recommended in melanoma patients during both winter and summer. [less ▲]

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See detailDistribution patterns of Caprella tavolarensis (Crustacea: Amphipoda) in the Tavolara-Punta Coda Cavallo Marine Protected Area.
Sturaro, Nicolas ULg; Gobert, Sylvie ULg; Lepoint, Gilles ULg et al

in Biologia Marina Mediterranea (2011), 18(1), 290-291

Distribution patterns of Caprella tavolarensis was investigated at the tavolara-punta Coda Cavallo Marine protected area. results revealed that C. tavolarensis abundance may exhibit spatial patterns ... [more ▼]

Distribution patterns of Caprella tavolarensis was investigated at the tavolara-punta Coda Cavallo Marine protected area. results revealed that C. tavolarensis abundance may exhibit spatial patterns associated with the protection status of the zones, highlighting the importance of totally protected areas in species conservation and management. [less ▲]

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See detailUn projet belge de recours collectif au regard des modèles espagnol et québécois
Frankignoul, Laurent ULg

in Revue de la Faculté de Droit de l'Université de Liège (2011)

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See detailBacterial diversity of field-caught mosquitoes, Aedes albopictus and Aedes aegypti, from different geographic regions of Madagascar.
Zouache, Karima; Raharimalala, Fara Nantenaina ULg; Raquin, Vincent et al

in FEMS Microbiology Ecology (2011)

Symbiotic bacteria are known to play important roles in the biology of insects, but the current knowledge of bacterial communities associated with mosquitoes is very limited and consequently their ... [more ▼]

Symbiotic bacteria are known to play important roles in the biology of insects, but the current knowledge of bacterial communities associated with mosquitoes is very limited and consequently their contribution to host behaviors is mostly unknown. In this study, we explored the composition and diversity of mosquito-associated bacteria in relation with mosquitoes’ habitats. Wild Aedes albopictus and Aedes aegypti were collected in three different geographic regions of Madagascar. Culturing methods and denaturing gradient gel electrophoresis (DGGE) and sequencing of the rrs amplicons revealed that Proteobacteria and Firmicutes were the major phyla. Isolated bacterial genera were dominated by Bacillus, followed by Acinetobacter, Agrobacterium and Enterobacter. Common DGGE bands belonged to Acinetobacter, Asaia, Delftia, Pseudomonas, Enterobacteriaceae and an uncultured Gammaproteobacterium. Double infection by maternally inherited Wolbachia pipientis prevailed in 98% of males (n = 272) and 99% of females (n = 413); few individuals were found to be monoinfected withWolbachia wAlbB strain. Bacterial diversity (Shannon–Weaver and Simpson indices) differed significantly per habitat whereas evenness (Pielou index) was similar. Overall, the bacterial composition and diversity were influenced both by the sex of individuals and by the environment inhabited by the mosquitoes; the latter might be related to both the vegetation and the animal host populations that Aedes used as food sources. [less ▲]

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See detailCompte-rendu de l'ouvrage de I. Leventi, Chr. Mitsopoulou, Ιερά και λατρείες της Δήμητρας στον αρχαἰο ελληνικό κόσμο
Paul, Stéphanie ULg

in Kernos : Revue Internationale et Pluridisciplinaire de Religion Grecque (2011), 24

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See detailTendente al nero. Voci e derive neofasciste al tempo della politica pop
Benzoni, Pietro ULg

in Curreri, Luciano; Foni, Fabrizio (Eds.) Fascismo senza fascismo? Indovini e revenants nella cultura popolare italiana (1899-1919 e 1989-2009) (2011)

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