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See detailEntrepreneurial teams in social entrepreneurship: When team heterogeneity facilitates organizational hybridity
Dufays, Frédéric ULg; Huybrechts, Benjamin ULg

in Ben-Hafaïedh, Cyrine; Cooney, Thomas (Eds.) Research handbook on entrepreneurial teams: Theory and practice (2017)

This chapter examines the composition of teams involved in social entrepreneurship and more particularly their heterogeneity in terms of “institutional logics”. It proposes that when social welfare and ... [more ▼]

This chapter examines the composition of teams involved in social entrepreneurship and more particularly their heterogeneity in terms of “institutional logics”. It proposes that when social welfare and market logics are integrated within founding teams, such hybridity is likely to infuse the whole entrepreneurial process to ultimately lead to the creation of a social enterprise as a “hybrid” organization. To theorize this process, a model is proposed that examines the implications of entrepreneurial team heterogeneity in social entrepreneurship. It makes clear that complexity and dynamism, in particular with regard to individuals’ social network structure, as well as interactions between team members, are necessary to understand the impact of team composition on the entrepreneurial process. An illustrative case study is presented to demonstrate the practical relevance of the model. [less ▲]

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See detailIntroduction
Masson, Christophe ULg

E-print/Working paper (2017)

Introduction de l'Assemblée générale de Ménestrel – 35e journée d'étude du Réseau des Médiévistes belges de Langue française. Le Moyen Âge dans les (nouveaux) médias. Quelle place pour les médiévistes  ... [more ▼]

Introduction de l'Assemblée générale de Ménestrel – 35e journée d'étude du Réseau des Médiévistes belges de Langue française. Le Moyen Âge dans les (nouveaux) médias. Quelle place pour les médiévistes ? Université de Liège, 7-8 octobre 2016 [less ▲]

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See detailApproche phénoménologique du soi psychopathique
Englebert, Jérôme ULg

in Cormann, Grégory; Boccaccini, Federico (Eds.) Le soi agent : Approches phénoménologiques (2017)

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See detailSustainability and management control. Exploring and theorizing control patterns in large European firms
Crutzen, Nathalie ULg; Zvezdov, Dimitar; Schaltegger, Stefan

in Journal of Cleaner Production (2017), 143

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See detailOn the Elaboration of Metal-Ceramic Composite Coatings by Laser Cladding
Mertens, Anne ULg; L'Hoest, Thibaut; Magnien, Julien et al

in Materials Science Forum (2017), 879

This paper reports on a preliminary investigation into the elaboration, by the additive process known as laser cladding, of composite coatings with a matrix of stainless steel 316L reinforced with varying ... [more ▼]

This paper reports on a preliminary investigation into the elaboration, by the additive process known as laser cladding, of composite coatings with a matrix of stainless steel 316L reinforced with varying contents of tungsten (WC) or silicon carbides (SiC) particles. Laser cladding is characterised by ultra-fast solidification and cooling rates, thus giving rise to ultra-fine out-of-equilibrium microstructures and potentially enhanced mechanical properties. Both types of composite coatings – i.e. with SiC or WC ‒ are compared in terms of their microstructures and hardness. Special attention is given to the dissolution of the carbides particles and to interfacial reactions taking place between the particles and the metallic matrix. [less ▲]

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See detailDEVELOPMENT OF ANALYTICAL TOOLS FOR THE DETERMINATION OF MARKERS OF LIPID ALTERATION IN FOOD
Douny, Caroline ULg

Doctoral thesis (2017)

It is now well-known that n-3 polyunsaturated fatty acids (omega-3 PUFA) have beneficial effects on health but are also rapidly oxidized in potentially toxic compounds, which means that healthy food ... [more ▼]

It is now well-known that n-3 polyunsaturated fatty acids (omega-3 PUFA) have beneficial effects on health but are also rapidly oxidized in potentially toxic compounds, which means that healthy food products, rich in n-3 PUFA, can become toxic for the consumer if not stored or processed appropriately. The main objective of this work was to develop new analytical tools to study markers of lipids alteration in food, in order to allow an adequate monitoring of possible toxic compounds in n-3 PUFA rich food products. The first chapter of this PhD thesis is a literature review about fatty acids, their oxidation and the different oxidation products generated. The different analytical techniques used to study the oxidative stability of polyunsaturated fatty acids and their degradation products in food are also described. Chapter 2 describes the development of a gas chromatography coupled to mass spectrometry (GC-MS) method to analyze the fatty acids in food. The method was applied to eggs and pork (both standard and n-3 enriched) submitted to various cooking processes and storage conditions. This study confirmed that the fat of standard eggs or pork from the Belgian market cannot be considered as a source ofn-3 PUFA.. Indeed, in this work, we measured no n-3 PUFA in meat or only around 2 % for eggs, while the fat of both enriched eggs and pork contained about 10 % of n-3 fatty acids. After storage or cooking without culinary fat no change of the fatty acid profile was observed, in standard eggs or pork. We made the same observation for n-3 enriched products, except for some cooking processes (pan-frying and oven cooking), which induced a slight but significant loss of n-3 fatty acids in n-3 enriched eggs or pork. The fairly stable behavior of the fatty acids after various cooking and storage experiments indicates that the fatty acid profile is not a good marker of lipid alteration. As a consequence, this work was oriented to the development of analytical tools to evaluate the presence of toxic aldehydes in food and feed as secondary oxidation products coming from polyunsaturated fatty acids. Chapter 3 is dedicated to the study of the oxidative stability of linseed oil, an oil rich in n-3 fatty acids. Section 3.1 describes the development of a liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) method to evaluate the aldehyde content in linseed oil. After optimisation of the extraction, derivation, detection and quantification steps, the method was validated according to guidelines from the European legislation as well as the recommendations of the AFNOR protocol NF V 03-110 (AFNOR, 2010). The evaluated parameters included specificity/selectivity, recovery, precision, accuracy, uncertainty, limits of detection and quantification, determined using the concept of accuracy profiles. When the method was applied to first pressure linseed oil stored for several days at 60 °C according to the Schaal oven test, it was shown that 4-hydroxy-2E-hexenal (4-HHE) was the most produced aldehyde. In Section 3.2, the different patterns of oxidation of linseed oil in real-time and accelerated aging assays were investigated, in order to verify the hypothesis commonly accepted for vegetal oil that one day aging at 60 °C is equivalent to one month real time aging at room temperature. Oxidation was evaluated with the peroxide value and para-anisidine value, as well as the content in conjugated dienes and aldehydes. All four indicators of oxidation showed very different kinetic behaviours at 20 and 60 °C, showing that the hypothesis (1 day at 60 °C = 1 month at 20 °C) is not valid for linseed oil. Chapter 4 describes the adaptation and the validation of a LC-MS/MS method to determine aldehydes in animal feed samples. Indeed, as animal feed is often enriched with linseed to increase the human intake of n-3 fatty acids through the consumption of food from animal origin, the study of the oxidative stability of n-3 enriched animal feed is also of interest. To achieve that goal, the LC-MS/MS method previously developed for linseed oil was adapted to include more aldehydes and was validated using the same guidelines as in section 3.1. Finally, chapter 5 presents the discussion and conclusions about the developed methods and the results obtained as well as their comparison with literature. Future prospects to improve the evaluation of and the exposure to the markers of lipid alteration in food are proposed. [less ▲]

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See detailEvaluation of hazardous chemicals in edible insects and insect-based food intended for human consumption
Poma, G; Cuykx, M; Amato, E et al

in Food and Chemical Toxicology (2017), 100

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See detailComment former à une vision élargie de l’évaluation formative en vue de réguler efficacement les apprentissages mathématiques des élèves ?
Fagnant, Annick ULg; Demonty, Isabelle ULg

in Detroz, Pascal; Crahay, Marcel; Fagnant, Annick (Eds.) L’évaluation à la lumière des contextes et des disciplines (2017)

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See detailNumerical Methods
Agelet de Saracibar, Carlos; Boman, Romain ULg; Bussetta, Philippe et al

in Schmitz, Georg; Prahl, Ulrich (Eds.) Handbook of Software Solutions for ICME, (2017)

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See detailAntiplasmodial activity of Heinsia crinita (Rubiaceae) and identification of new iridoids.
Tshisekedi Tshibangu, P.; Mutwale Kapepula, P.; Kabongo Kapinga, M. J. et al

in Journal of Ethnopharmacology (2017), 196

ETHNOPHARMACOLOGICAL RELEVANCE: Heinsia crinita is used in traditional medicine for the treatment of febrile illness and erectile dysfunction. Its stem bark powder is found in some peripheral markets in ... [more ▼]

ETHNOPHARMACOLOGICAL RELEVANCE: Heinsia crinita is used in traditional medicine for the treatment of febrile illness and erectile dysfunction. Its stem bark powder is found in some peripheral markets in the Democratic Republic of the Congo (DRC) as a remedy against malaria. Investigations were conducted on crude extracts of leaves, fruits and stem barks in view to validate their use and to determine which plant part possesses the best antiplasmodial properties. MATERIALS AND METHODS: Different plant parts were extracted with methanol, ethanol and dichloromethane. Based on the preliminary assays, the dichloromethane extract of the stem bark was subjected to fractionation using preparative HPLC system and column chromatography. This step led to the isolation of two new iridoids which had their structures elucidated by NMR, UV, MS and FT-IR spectroscopic techniques. Extracts and pure compounds were tested in vitro against the 3D7 strain of Plasmodium falciparum. The inhibition of the parasite growth was evaluated in vitro by colorimetric method (p-LDH assay) and their cytotoxicity evaluated in vitro against the human non-cancer fibroblast cell line (WI38) through WST1 assay. The in vivo antiplasmodial activity was assessed by the inhibition of Plasmodium berghei growth in infected mice treated with the ethanol extract of H. crinita stem bark at the concentrations of 200 and 300mg/Kg/day per os, using a protocol based on the 4-d suppressive test of Peters and compared to a non-treated negative control group of mice (growth =100%). Finally the antioxidant activity of the same extract was evaluated using ABTS, DPPH and cell-based assays. RESULTS: A moderate in vitro antiplasmodial activity was observed for the dichloromethane extract of the stem bark of H. crinita (IC50 =29.2+/-1.39microg/mL) and for the two new iridoids, lamalbide 6, 7, 8- triacetate (IC50 =16.39+/-0.43microg/mL) as well as for its aglycone lamiridosin 6, 7, 8-triacetate (IC50 =0.44.56+/-1.12microg/mL). The ethanolic stem bark extract (200 and 300mg/kg/day, oral route) showed a moderate in vivo antimalarial activity in Plasmodium berghei-infected mice with 27.84+/-2.75% and 48.54+/-3.76% of inhibition of the parasite growth, respectively (p<0.01).). This extract displayed high cellular antioxidant activity using dichlorofluorescein-diacetate (DCFDA) on HL-60 monocytes. These crude extracts and pure compounds tested at the higher concentration of 100microg/mL did not show any cytotoxicity against WI38 cells. CONCLUSIONS: The results showed that H. crinita extracts possess antimalarial activity and contain some unusual iridoids with moderate antiplasmodial activity, therefore justifying to some extent its traditional use by the local population in DRC for this purpose. This is the first report of the isolation and antiplasmodial activity of these two new iridoids. [less ▲]

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See detailInvestigation of the added mass method for seismic design of lock gates
Buldgen, Loïc ULg; Le Sourne, Hervé; Caprace, Jean-David ULg et al

in Engineering Structures (2017)

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See detailDancing without listening to the music: learning from some failures of the ‘national innovation systems’ in Latin America
Delvenne, Pierre ULg; Thoreau, François ULg

in Kuhlmann, Stefan; Ordóñez-Matamoros, Gonzalo (Eds.) Research Handbook on Innovation Governance for Emerging Economies (2017)

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See detailFast In-Plane Dynamics of a Beam with Unilateral Constraints
Liakou, Anna; Denoël, Vincent ULg; Detournay, Emmanuel

in Journal of Engineering Mechanics (2017), 0(0), 04016116

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See detailIterated local search for the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints
Pollaris, Hanne; Braekers, Kris; Caris, An et al

in Network (2017)

In this article an Iterated Local Search algorithm for the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints is presented. Axle weight limits impose a ... [more ▼]

In this article an Iterated Local Search algorithm for the capacitated vehicle routing problem with sequence-based pallet loading and axle weight constraints is presented. Axle weight limits impose a great challenge for transportation companies. Yet, the literature on the incorporation of axle weight constraints in vehicle routing models is very scarce. The effect of introducing axle weight constraints in a CVRP on total routing cost is analyzed. Results show that integrating axle weight constraints does not lead to a large cost increase. However, not including axle weight constraints in the planning process may induce major axle weight violations. [less ▲]

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See detailZeit-Räume im langen 19. Jahrhundert. Erfahrungen von Verdichtung, Beschleunigung und Beharrung
Brüll, Christoph ULg; Fickers, Andreas

in Lejeune, Carlo (Ed.) Grenzerfahrungen. Eine Geschichte der Deutschsprachigen Gemeinschaft Belgiens. Vol. 3: Code Civil, beschleunigte Moderne und Dynamiken des Beharrens (1794-1919) (2017)

Der Begriff des Zeitraums ist eine Besonderheit der deutschen Sprache. Zeit und Raum müssen in der historischen Betrachtung gemeinsam gedacht werden. Doch über welche Zeit reden wir in diesem Band? Wie ... [more ▼]

Der Begriff des Zeitraums ist eine Besonderheit der deutschen Sprache. Zeit und Raum müssen in der historischen Betrachtung gemeinsam gedacht werden. Doch über welche Zeit reden wir in diesem Band? Wie können historische Brüche und Kontinuitäten erfasst und als Teil einer globalen Geschichte gedeutet werden? Über welchen Raum reden wir? Waren die Grenzregionen zwischen Rhein und Maas nur Randregionen, deren Bedeutung allein aus dem Blickwinkel der Zentren deutlich wird? Oder waren sie eher Zwischenräume, deren Potenzial aus dem Miteinander über alle Grenzen hinweg gelesen werden kann? Grundsätzliche Fragen, zahlreiche Anregungen und Beispiele über Zeit und Raum im langen 19. Jahrhundert und das Konzept dieses Bandes. [less ▲]

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See detailDie beständige Suche nach Heimaten. Über Lebensperspektiven von Auswanderern, Einwanderern und Minderheiten
Giesdorf, Jens; Lindig, Anja; Brüll, Christoph ULg

in Lejeune, Carlo (Ed.) Grenzerfahrungen. Eine Geschichte der Deutschsprachigen Gemeinschaft Belgiens. Vol. 3: Code Civil, beschleunigte Moderne und Dynamiken des Beharrens (1794-1919) (2017)

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See detailEin Schattendasein in der Geschichtsschreibung. Wenige Blicke auf die Zwischenräume im langen 19. Jahrhundert
Brüll, Christoph ULg; Lejeune, Carlo

in Lejeune, Carlo (Ed.) Grenzerfahrungen. Eine Geschichte der Deutschsprachigen Gemeinschaft Belgiens. Vol. 3: Code Civil, beschleunigte Moderne und Dynamiken des Beharrens (1794-1919) (2017)

Die Sekundärliteratur zum langen 19. Jahrhundert zwischen Göhl und Our ist übersichtlich. Dieser Grenz- und Übergangsraum wird meist mit Blick auf die Zentren analysiert. Dabei wird die Modernisierung mit ... [more ▼]

Die Sekundärliteratur zum langen 19. Jahrhundert zwischen Göhl und Our ist übersichtlich. Dieser Grenz- und Übergangsraum wird meist mit Blick auf die Zentren analysiert. Dabei wird die Modernisierung mit der Nationalisierung gleichgesetzt. Die Grenzerfahrungen bleiben weitgehend ausgeblendet. Die Grenzregion als „Zwischenraum“ zwischen Nationalstaaten zu betrachten, bleibt eine aktuelle Herausforderung für die Geschichtsschreibung in dieser Region. Einblicke in die Vielfalt unterschiedlicher Sichtweisen und Geschichtsbilder über eine spannende Zeit. [less ▲]

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See detailEvidence of a fine-scale genetic structure for the endangered Pyrenean desman (Galemys pyrenaicus) in the French Pyrenees
Gillet, F; Cabria, M.; Blanc, F. et al

in Journal of Mammalogy (2017)

The Pyrenean desman (Galemys pyrenaicus) is a small, semi-aquatic mammal endemic to the Pyrenean Mountains and the northern half of the Iberian Peninsula where it lives in cold and well-oxygenated flowing ... [more ▼]

The Pyrenean desman (Galemys pyrenaicus) is a small, semi-aquatic mammal endemic to the Pyrenean Mountains and the northern half of the Iberian Peninsula where it lives in cold and well-oxygenated flowing mountain streams. This species is currently classified as vulnerable on the IUCN Red List and has been undergoing habitat loss and fragmentation for decades, inevitably impacting its distribution. A recent genetic study, based on mitochondrial and intronic sequences, showed that the genetic variability of the Pyrenean desman is very low in the Pyrenees. In this study, we investigated the potential existence of genetic structure and gene flow at a smaller scale using 24 polymorphic microsatellite loci. As the Pyrenean desman is a very elusive species, we supplemented our tissue sample collection with samples of feces collected in the French range of this species. We successfully identified 70 individuals based on 355 fecal samples. Bayesian analyses revealed 3 genetic and geographic clusters (1 eastern, 1 central, and 1 western, including 3 genetic sub-clusters), with origins tracing back only 200 years. These clusters were characterized by low levels of genetic diversity and high inbreeding coefficients. Although gene flow among clusters appeared to be limited, populations seem to have exchanged alleles recently. Therefore, connectivity between watersheds should be enhanced to maintain genetic diversity and potentially improve the long-term survival of the Pyrenean desman in France [less ▲]

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See detailContrasted terrace systems of the lower Moulouya river as indicator of crustal deformation in NE Morocco
Rixhon, Gilles; Bartz, Melanie; El Ouahabi, Meriam ULg et al

in Journal of African Earth Sciences (2017)

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See detailEconomie sociale et transition polycentrique
Bauwens, Thomas ULg; Mertens de Wilmars, Sybille ULg

in Cassiers, Isabelle; Maréchal, Kevin; Méda, Dominique (Eds.) Vers une société post-croissance. intégrer les défis écologiques et sociaux. (2017)

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