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See detailLacunes extrinsèques et effets au contentieux préjudiciel : lorsque la Cour de cassation fait d'une pierre deux coups
Pironnet, Quentin ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2016), 35(2016), 1652-1658

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See detailThe BCCM/ULC collection to conserve the biodiversity and explore the applied potential of Polar cyanobacteria
Becker, Pierre; SZTERNFELD, P; ANDJELKOVIC, M et al

Poster (2016, October 28)

In the Polar Regions, Cyanobacteria represent key primary producers and are the main drivers of the food webs in a wide range of aquatic to terrestrial habitats. For example, they build benthic microbial ... [more ▼]

In the Polar Regions, Cyanobacteria represent key primary producers and are the main drivers of the food webs in a wide range of aquatic to terrestrial habitats. For example, they build benthic microbial mats in lakes and soil crusts in terrestrial biotopes. They may present interesting features to survive freeze/thaw cycles, seasonally contrasted light intensities, high UV radiations, dessication and other stresses. The BCCM/ULC public collection funded by the Belgian Science Policy Office since 2011 aims to gather a representative portion of the polar cyanobacterial diversity with different ecological origins (limnetic mats, soil crusts, cryoconites, endoliths…). It makes it available for researchers to study the taxonomy, evolution, adaptations to harsh environmental conditions, and genomic make-up. It presently includes 226 cyanobacterial strains, with 119 being of Antarctic origin (catalogue: http://bccm.belspo.be/catalogues/ulc-catalogue-search). An ISO 9001 certificate was obtained for the public deposition and distribution of strains, as part of the multi-site certification for the BCCM consortium. The morphological identification shows that the strains belong to the orders Synechococcales, Oscillatoriales, Pleurocapsales, Chroococcidiopsidales and Nostocales. The 16S rRNA and ITS sequences of the strains are being characterized. Our results show that the Antarctic strains are positioned into 25 OTUs (sequences with > 97,5% 16S rRNA similarity), and thus, represent a quite large diversity. In addition, cyanobacteria are known to produce a wide range of secondary metabolites (e.g. alkaloids, cyclic and linear peptides, polyketides) with bioactive potential. Among these bioactive metabolites, some display antibiotic, anticancer or antifungal effects. In collaboration with the BCCM/IHEM collection of biomedical fungi, a screening of cyanobacterial strains from BCCM/ULC was performed in order to discover potential new antifungal drugs. The analysis of a first set of methanol extracts from 15 different strains put in evidence the antifungal activity of a Phormidium priestleyi isolate. The latter remains active up to 0.5% (v/v) of fungal culture and was able to inhibit the growth of various fungal species among Candida, Cryptococcus, Aspergillus, and Penicillium. The raw extract was subjected to HPLC and a fraction containing the active molecule was obtained. This molecule appeared to be a thermostable hydrophobic compound. Moreover, in vitro toxicological analyses suggest that the compound has a general cytotoxic effect that could be inhibited by the mammalian metabolism. Further analyses are needed to identify the molecule and to determine if it could be a candidate for a new antifungal drug. In summary, the BCCM/ULC public collection serves as a Biological Resource Centre to conserve ex situ and document the biodiversity of polar cyanobacteria, as well as a repository for discovery of novel bioactive compounds. [less ▲]

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See detailThe ‘cyanobiome’ of Svalbard, High Arctic
Stelmach Pessi, Igor ULg; Laughinghouse, H Dail; Velazquez, David et al

Poster (2016, October 28)

Over the last decades, the Arctic has experienced a warming trend that is nearly twice as high as the global average, a phenomenon known as ‘Arctic amplification’. The impact of warmer temperatures on ... [more ▼]

Over the last decades, the Arctic has experienced a warming trend that is nearly twice as high as the global average, a phenomenon known as ‘Arctic amplification’. The impact of warmer temperatures on Arctic ecosystems is still unclear. Cyanobacteria are the key primary producers in freshwater and terrestrial Arctic ecosystems, where they are the driver for numerous ecological functions. For a better understanding of the impacts of climate change on Arctic ecosystems, baseline knowledge on cyanobacterial diversity and distribution is crucial. Here we investigate, for the first time, the biogeographic patterns of cyanobacterial communities across Svalbard, using 454 pyrosequencing of partial 16S rRNA gene sequences. Samples were taken from distinct ecosystems and biogeographic zones. We also compare the studied communities with similar Antarctic communities. [less ▲]

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See detailPalynology and palaeogeography of the middle Přídolí from Saudi Arabia
Steemans, Philippe ULg; Breuer, P.; Al-Hajri, S. et al

Conference (2016, October 27)

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See detailOccurrence and significance of minute palynomorphs of marine and non - marine origin in the Middle Ordovician from Saudi Arabia
Le Hérissé, A.; Guidat, C.; Not, F. et al

Conference (2016, October 27)

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See detailSilurian palynomorphs from the Precordillera basin, western Argentina: biostratigraphy and diversity trends
Garcia Muro, V.J.; Rubinstein, C.V.; Steemans, Philippe ULg

Poster (2016, October 27)

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See detailLes 10 ans d’Envol à l’école Saint-Pierre : La musique et le conte au centre des apprentissages et du vivre ensemble dans les classes
Gavray, Claire ULg

Conference (2016, October 27)

historique du projet, évaluation des apports et perspectives

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See detailNew features in SAFIR® 2016 - SWS 2016
Franssen, Jean-Marc ULg; Gernay, Thomas ULg

Scientific conference (2016, October 27)

Presentation of the new capabilities and developments in the version 2016 of SAFIR, a non linear software dedicated to the analysis of the behaviour of structures in fire.

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See detailL'Union européenne ou la désunion des valeurs
Bouhon, Frédéric ULg; Wildemeersch, Jonathan ULg

Scientific conference (2016, October 27)

Cette intervention visait à introduire l'exposé des ministres hongrois Laszlo Trocsanyi et polonais Aleksander Stepkowski. Les auteurs adressent une série de questions en lien avec les évolutions ... [more ▼]

Cette intervention visait à introduire l'exposé des ministres hongrois Laszlo Trocsanyi et polonais Aleksander Stepkowski. Les auteurs adressent une série de questions en lien avec les évolutions politiques et juridiques que connaissent la Hongrie et la Pologne, tant sur le plan interne (réformes électorales, réformes des juridictions constitutionnelles, mises en cause de certaines droits fondamentaux) que dans leurs relations avec l'Union européenne. [less ▲]

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See detailQuelques réflexions à propos du régime de (dé)fiscalisation des revenus des PME dans le système fiscal belge
Bourgeois, Marc ULg

in Aydogdu, Roman (Ed.) Les petites et moyennes entreprises dans le droit des affaires (2016, October 27)

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See detailLa place de la coopération sud -sud dans les stratégies d'action des pays émergents : Acteurs et Enjeux des relations entre l'Afrique et l'Amérique latine
Mvengou Cruzmerino, Martine Colette ULg

Conference (2016, October 27)

This comunication deals with the use of South-South Cooperation as strategic tool for emergent, and its place in the external policies of Brazil, Southa africa and Venezuela. This work focuses also on the ... [more ▼]

This comunication deals with the use of South-South Cooperation as strategic tool for emergent, and its place in the external policies of Brazil, Southa africa and Venezuela. This work focuses also on the interregional relations between Latin American and Africa and the impact and opportunities of this kind of interregional south south cooperation. [less ▲]

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See detailLa Belgique illustrée: artisti in movimento per la memoria di un patrimonio storico - paesaggistico in trasformazione
Rapalo, Maria Chiara ULg

Scientific conference (2016, October 27)

Il presente contributo intende approfondire i caratteri iconografici delle realtà paesaggistiche urbane e naturali rappresentate nei disegni di alcune personalità della cultura belga di fine Ottocento. In ... [more ▼]

Il presente contributo intende approfondire i caratteri iconografici delle realtà paesaggistiche urbane e naturali rappresentate nei disegni di alcune personalità della cultura belga di fine Ottocento. In particolare le immagini presenti nei tre volumi di Emile Bruylant, (La Belgique illustrée, editi nel 1892) – hanno registrato quei caratteri urbani e naturali che il Belgio vedeva dissolversi in favore di un preteso sviluppo politico ed economico del periodo di Leopoldo II. Nell’ultimo decennio del XIX secolo una grande opera di sensibilizzazione nei confronti della tutela del paesaggio belga urbano e naturale fu portata avanti in Belgio da numerosi artisti, i quali furono tra i primi a nutrire spiccata sensibilità verso i temi della conservazione e delle testimonianze storiche. Il contributo intende dunque analizzare il legame tra le immagini riportate nei volumi e lo sviluppo di talune posizioni conservative che nell’ambito belga è possibile riscontrare in alcune figure, tra cui quella di Charles Buls) e nell’ azione della Société Nationale pour la protection des sites et des monuments. [less ▲]

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See detailPlant functional trait diversity in wildflower strips: the key to promote pollinators in agricultural landscapes?
Uyttenbroeck, Roel ULg; Piqueray, Julien; Monty, Arnaud ULg

Conference (2016, October 27)

Creating wildflower strips is often suggested as a tool to support pollinator diversity in agricultural landscapes and to promote crop pollination service. The choice of the plant species to sow in flower ... [more ▼]

Creating wildflower strips is often suggested as a tool to support pollinator diversity in agricultural landscapes and to promote crop pollination service. The choice of the plant species to sow in flower strips can influence the effectivity of the strips in supporting pollinators. While it has already been shown that increasing plant species diversity is beneficial for ecosystem services, it is often suggested that plant functional traits and functional trait diversity are the key for this relationship. We created a replicated field experiment with different levels of plant functional diversity in wildflower strips in Belgium to test the effect on the flower-visiting pollinator community. We sampled plant-pollinator interaction networks during 2 years and assessed how the plant functional diversity affected the network structure. Plant functional diversity did not have a clear effect on visiting pollinator species richness, however a different interaction pattern was observed with different functional diversity level. Pollinators in wildflower strips with higher functional diversity had less overlap in their ecological niche, while network stability and robustness for secondary extinctions were not affected. We discuss implications for wildflower strip design. [less ▲]

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See detailDéfi climatique: l'état et le marché
Gautier, Axel ULg

Conference given outside the academic context (2016)

Detailed reference viewed: 17 (1 ULg)