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See detailStandardisation of milk mid-infrared spectra from a European dairy network
Grelet, Clément ULg; Fernandez Pierna, Juan Antonio; Dardenne, Pierre et al

in Journal of Dairy Science (2015), 98

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See detailEffect of iron nanoparticles synthesized by a sol-gel process on Rhodococcus erythropolis T902.1 for biphenyl degradation
Wannoussa, Wissal; Masy, Thibaut ULg; Lambert, Stéphanie ULg et al

in Journal of Water Resource and Protection (2015), 7

Nanoparticles (NPS) are considered as a new generation of compounds to improve environmental remediation and biological processes. The aim of this study is to investigate the effect of iron NPS ... [more ▼]

Nanoparticles (NPS) are considered as a new generation of compounds to improve environmental remediation and biological processes. The aim of this study is to investigate the effect of iron NPS encapsulated in porous silica (SiO2) on the biphenyl biodegradation by Rhodococcus erythropolis T902.1 (RT902.1). The iron NPS (major iron oxide FexOy form) were dispersed in the porosity of a SiO2 support synthesized by sol-gel process. These Fe/SiO2 NPS offer a stimulating effect on the biodegradation rate of biphenyl, an organic pollutant that is very stable and water-insoluble. This positive impact of NPS on the microbial biodegradation was found to be dependent on the NPS concentration ranging from 10−6 M to 10−4 M. After 18 days of incubation the cultures containing NPS at a concentration of 10−4 M of iron improved RT902.1 growth and degraded 35% more biphenyl than those without NPS (positive control) or with the sole SiO2 particles. Though the microorganism could not interact directly with the insoluble iron NPS, the results show that about 10% and 35% of the initial 10−4 M iron NPS encapsulated in the SiO2 matrix would be incorporated inside or adsorbed on the cell surface respectively and 35% would be released in the supernatant. These results suggest that RT902.1 would produce siderophore-like molecules to attract iron from the porous silica matrix. [less ▲]

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See detailConsommation de pornographie à l’adolescence : quelles représentations de la sexualité et de la pornographie, pour quelle sexualité ?
Puglia, Rosa ULg; Glowacz, Fabienne ULg

in Neuropsychiatrie de l'Enfance et de l'Adolescence (2015)

Cette recherche, réalisée sur une population de 319 adolescents (150 filles et 169 garçons) âgés de 15 à 19 ans, présente deux grands objectifs. Premièrement, elle vise à évaluer l’impact de ... [more ▼]

Cette recherche, réalisée sur une population de 319 adolescents (150 filles et 169 garçons) âgés de 15 à 19 ans, présente deux grands objectifs. Premièrement, elle vise à évaluer l’impact de l’accessibilité et de la visualisation de la pornographie au niveau des représentations de ce média et de la sexualité. Deuxièmement, elle vise à évaluer l’influence de la consommation pornographique au niveau du développement psycho-sexuel des adolescents. Un protocole comprenant plusieurs dimensions telles que les relations sentimentales, la sexualité, la pornographie, et les représentations a été administré aux participants de manière groupale et anonyme. Il en ressort que les adolescents consommateurs de pornographie soulignent davantage les effets positifs associés à la pornographie, qu’ils reconnaissent une influence de ce média sur leur vie sexuelle et qu’ils adoptent des pratiques sexuelles plus diversifiées que celles de leurs pairs non-consommateurs. En revanche, consommateurs et non-consommateurs soulignent de manière identique les effets négatifs associés à ce média. Cette conscientisation des effets négatifs aurait un effet modérateur sur l’influence de la pornographie. Actuellement, la consommation de pornographie est un comportement expérimenté par une majorité d’adolescents ; elle pourrait s’inscrire dans un processus développemental adolescentaire et se comprendre comme une conduite exploratoire répondant à diverses fonctions dont la recherche de repères au niveau de la sexualité. [less ▲]

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See detailDépasser la situation : de la situation-limite à la personnalité borderline. Généalogie, critique et clinique d’un concept sartrien
Cormann, Grégory ULg; Englebert, Jérôme ULg

Conference (2015, January 31)

Nous souhaitons interroger ici le concept sartrien de situation à partir d’une double approche historique et psychopathologique qui semble en diagnostiquer la disparition tout aussi bien conceptuelle ... [more ▼]

Nous souhaitons interroger ici le concept sartrien de situation à partir d’une double approche historique et psychopathologique qui semble en diagnostiquer la disparition tout aussi bien conceptuelle qu’existentielle : la notion de situation, organisatrice de l’ontologie phénoménologique de Sartre et pivot de son engagement, semble s’être aujourd’hui désintégrée en tant que concept (voir ses usages pseudo-conceptuels dans les domaines de la pédagogie et du management), alors que ce qu’on appelle la « condition postmoderne », telle qu’elle s’exprime dans de nouvelles symptomatologies psychopathologiques, rend apparemment caduque, face à la fragmentation des repères de l’existence, l’exigence de penser en/la situation. Nous procèderons en trois temps. Nous ferons d’abord la généalogie du concept, dont l’application à la psyché humaine et à la représentation théâtrale de celle-ci remonte, selon Leo Spitzer, à la fin du 17ème siècle. Dans cette première section, nous insisterons en particulier sur le rapport que l’élaboration du concept de situation entretient, au début du 20ème siècle, avec l’émergence de la psychopathologie notamment chez Jaspers (« situation-limite ») et chez Minkowski (nous rappellerons à cet égard le rôle de Gabriel Marcel dans le champ philosophique français de l’entre-deux-guerres). Nous serons également attentifs à la critique méthodologique que le concept de situation permet d’adresser à la métapsychologie freudienne. Sur cette base, nous reprendrons ensuite les principales étapes chez Sartre de la prise en considération de l’homme en situation et des possibilités de dépassement de cette situation. Nous envisagerons successivement l’Esquisse d’une théorie des émotions, « Questions de méthode » et L’Idiot de la famille. Il conviendra certes de rappeler comment l’existentialisme, comme le situationnisme à sa façon, a cherché, dans le sillage du marxisme, à réaliser la philosophie et du coup à transformer le concept en vécu. Mais nous montrerons aussi, à rebours, comment l’œuvre sartrienne, confrontée aux exigences conjointes du marxisme et de la psychanalyse (cf. l’analyse des pressions familiales dans le Flaubert), a dû dépasser le cadre de la magie émotionnelle au sein duquel la notion de situation s’était d’abord élaborée. Au-delà de la « situation sartrienne » – et peut-être en la prolongeant –, la critique de Deleuze des dispositifs nous servira enfin, dans un troisième temps, de point de bascule vers la condition postmoderne et la fragmentation de la situation en tant que repère d’existence. Le sujet borderline – véritable éclat de la postmodernité – nous permettra ainsi de conclure en reprenant le propos psychopathologique maturé par l’évolution conceptuelle de la situation. Nous caractériserons l’existence borderline par une fragmentation du soi corrélée à une explosion, voire à un morcellement, des espaces de vie qui répondent à la nécessité ontologique d’une « ubiquité instantanée » dénuée de présence corporelle (comme le permettent les espaces virtuels « connectés »). [less ▲]

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See detailDroit constitutionnel - Dossier de documentation (année 2014-2015)
Behrendt, Christian ULg

Learning material (2015)

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en 2e année de ... [more ▼]

Le document constitue le Dossier de documentation, à lire par les étudiants en parallèle au cours ex cathedra, de l'enseignement de Droit constitutionnel dispensé à l'Université de Liège en 2e année de bachelier en droit et en 2e année de bachelier en science politique. [less ▲]

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See detailActivités physiques, représentations et femmes
Cloes, Marc ULg

Conference (2015, January 31)

Il est admis internationalement que les filles et les femmes représentent un public à risque en matière de sédentarité. Cette conférence interactive vise à répondre à trois questions: (1) L’activité ... [more ▼]

Il est admis internationalement que les filles et les femmes représentent un public à risque en matière de sédentarité. Cette conférence interactive vise à répondre à trois questions: (1) L’activité physique, qu’est-ce que c’est? (2) A quoi ça sert? (3) Qu’est-ce qu’il faut faire, finalement? Au-delà de la volonté de faire vivre aux participants une expérience originale, les objectifs finaux de l'intervention consistent à permettre une prise de conscience et à proposer des pistes d’action. [less ▲]

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See detailLe rythme vidéoludique comme mouvement : "Second Sight" et la ritournelle
Dupont, Bruno ULg

in Interval(le)s (2015), 7

Dans cet article, Bruno Dupont part de la constatation que la notion de rythme est omnipré- sente dans les descriptions et analyses de jeux vidéo, sans pour autant qu'il ait été tenté jusqu'ici de ... [more ▼]

Dans cet article, Bruno Dupont part de la constatation que la notion de rythme est omnipré- sente dans les descriptions et analyses de jeux vidéo, sans pour autant qu'il ait été tenté jusqu'ici de développer un concept de rythme qui soit adapté à la recherche. Partant de l'article bien connu de Benveniste sur l'étymologie du rythmos, de même que de la conception nonbinaire du rythme chez Deleuze et Guattari, exposée dans le chapitre de Mille plateaux consacré à la ritournelle, l'auteur souhaite fournir les prolégomènes d'un tel concept. En guise de support à sa démonstration, il utilise le jeu Second Sight sur Playstation 2 (2004). Cette contribution souligne qu'une théorie du rythme suppose l'analyse des séquences de mouvements produites par l'interaction entre jeu et joueur, ainsi que de la gestion du temps qui en découle. Dans le cas de Second Sight, en raison de la double appartenance générique du jeu (action et aventure), deux séquences motrices hétérogènes se trouvent coordonnées au sein d'un seul et même jeu, de sorte que naît une zone de friction, – que Dupont décrit à la suite de Deleuze/Guattari comme „entre-deux“ – dans laquelle le rythme spécifique au jeu, mais également au genre, se réalise par l'échange permanent entre deux modes spatio-temporels. En conclusion, l'auteur propose une définition du rythme vidéoludique qui place la machine et le joueur dans un contexte d'interaction et de négociation dynamique. [less ▲]

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See detailL'anorexie chez l'adolescente au croisement de questionnements
Glowacz, Fabienne ULg

Scientific conference (2015, January 31)

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See detailStudy of durability and the physico-mechanical properties of thermally modified wood
Ninane, Maxime; Jourez, Benoît ULg; Hebert, Jacques ULg

Poster (2015, January 30)

Heat-treated wood is a credible alternative for certain kinds of tropical timber. It is also an alternative for certain polluting wood preservatives. This study aims to determine the changes in physico ... [more ▼]

Heat-treated wood is a credible alternative for certain kinds of tropical timber. It is also an alternative for certain polluting wood preservatives. This study aims to determine the changes in physico-mechanical properties and durability of wood that is subjected to heat treatment. For this, we studied five species (oak, ash, natural beech and a variant known as steamed beech, poplar, Douglas-fir). For each species, we had fifteen reference samples and fifteen corresponding treated samples. The results show a decrease in the hygroscopicity and an increase in dimensional stability of heat-treated wood in relation to the degradation of hemicelluloses. The mechanical properties are influence variously, because heat-treated wood is stiffer but also more brittle. The modulus of elasticity increases slightly after treatment. Side hardness and compressive fracture of heat-treated wood may increase up to 30%. On the other hand, the modulus of rupture, the ability to slit and impact may decrease by 50%, 60% and 70%. The durability of heat-treated wood against wood-destroying fungi increases. However, within each species, the durability increase varies greatly. Additional tests conducted to understand this variability, suggests that the heat distribution is not homogeneous within the processing unit. Moreover, our work suggests that durability is related to the fixed carbon content and that this path would be interesting to explore in the future. [less ▲]

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See detailElicitation of the defence mechanisms at plant case of Cucumis melo
Ydjedd, Siham; Kati, D.E.; Fauconnier, Marie-Laure ULg

Poster (2015, January 30)

The judicious use of elicitors could reduce the amount of pesticide necessary to protect crops and preservation of the environment. This strategy frequently called "stimulation of natural defenses ... [more ▼]

The judicious use of elicitors could reduce the amount of pesticide necessary to protect crops and preservation of the environment. This strategy frequently called "stimulation of natural defenses" arouses more and more interest in the phytosanitary field. [less ▲]

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See detailInteractions of natural rhamnolpids produced by Pseudomonas aeruginosa with plant model membranes
Polo Lozano, Damien ULg; Nasir, Mehmet Nail ULg; Deleu, Magali ULg et al

Poster (2015, January 30)

It is well known that chemical pesticides have harmful effects on human health and environment. In this context, the interest for alternative products such as biopesticides is increasing. Among them ... [more ▼]

It is well known that chemical pesticides have harmful effects on human health and environment. In this context, the interest for alternative products such as biopesticides is increasing. Among them, elicitors act on the plants by inducing systemic resistance against diseases caused by fungal, viral, bacterial agents and insects. Rhamnolipids are surface active molecules produced mainly by various strains of the bacterium Pseudomonas aeruginosa. These secondary metabolites are composed of one to three fatty acids with various chain lengths linked through a glycosidic bond to one or two rhamnose moieties. The fatty acids are linked together through an ester bond. These molecules have shown several biological activities including plant defense stimulation. It has been suggested that this elicitor activity could be related to an interaction of rhamnolipids with the lipid bilayer of the plant plasma membrane (PPM) and lead to its destabilization, which can activate the plant defense signaling pathways. In this context, interactions of two rhamnolipids (Rha-C10-C10 and Rha-Rha-C10-C10) with biomimetic membranes of PPM such as Langmuir monolayers and multilayers were investigated using biophysical and in silico approaches. [less ▲]

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See detailL'expérience d'une vie : Sartre, Fanon et nous
Cormann, Grégory ULg

Conference given outside the academic context (2015)

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See detailStructural, functional, and ACE inhibitory properties of water-solublepolysaccharides from chickpea flours
Mokni Ghribi, abir; Sila, Assaâd; Maklouf Gafsi, Ines et al

in International Journal of Biological Macromolecules (2015), 75

tThe present study aimed to characterize and investigate the functional and angiotensin-I convertingenzyme (ACE) inhibition activities of chickpea water-soluble polysaccharides (CPWSP). Physico ... [more ▼]

tThe present study aimed to characterize and investigate the functional and angiotensin-I convertingenzyme (ACE) inhibition activities of chickpea water-soluble polysaccharides (CPWSP). Physico-chemicalcharacteristics were determined by nuclear magnetic resonance spectroscopy (NMR), Fourier transform-infrared spectroscopy (FT-IR) analysis, and X-ray diffractometry (XRD). Functional properties (waterholding capacity: WHC, water solubility index: WSI, swelling capacity: SC, oil holding capacity: OHC,foaming, and emulsion properties) and ACE activities were also investigated using well-established pro-cedures. The FT-IR spectra obtained for the CPWSP revealed two significant peaks, at about 3500 and500 cm−1, which corresponded to the carbohydrate region and were characteristic of polysaccharides.All spectra showed the presence of a broad absorption between 1500 and 670 cm−1, which could beattributed to C−H, C−O, and O−H bands in the polysaccharides. CPWSP had an XRD pattern that wastypical for a semi-crystalline polymer with a major crystalline reflection at 19.6◦C. They also displayedimportant techno-functional properties (SWC, WSI, WHC, and OHC) that can be modulated accordingto temperature. The CPWSP were also noted to display good anti-hypertensive activities. Overall, theresults indicate that CPWSP have attractive chemical, biological, and functional properties that makethem potential promising candidates for application as alternative additives in various food, cosmetic,and pharmaceutical preparations. [less ▲]

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See detailL'arme de la transition énergétique pour combattre les djihadistes
Ernst, Damien ULg; Hermans, Michel ULg

Article for general public (2015)

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See detailBiochemical methane potential of residues of three banana varieties from Cameroon : fresh and dry peduncles
Awedem wobiwo, Florent; Happi Emaga, Thomas; Fokou, Elie et al

Poster (2015, January 30)

In Cameroon , the ratio of energy cost to standard of living for both electric and fuel energy is higher than in USA and EU. The local energy needs could be met by valorizing local wastes in an ... [more ▼]

In Cameroon , the ratio of energy cost to standard of living for both electric and fuel energy is higher than in USA and EU. The local energy needs could be met by valorizing local wastes in an environmentally and economically sustainable way. Banana and plantain plants produce significant quantities of post-harvest biomass wastes such as bulbs, pseudo stems, leaf sheaths, petioles–midribs, leaf blades, peduncles, rachis and blossoms which can be converted to methane-rich biogas by anaerobic digestion (AD). AD is a natural process of degradation of organic materials. [less ▲]

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See detailLangmuir film balance- A technique to study the interaction of β-cyclodextrin with cholesterol in milk fat globule membrane monolayers
Malik, Priyanka ULg; Danthine, Sabine ULg; Paul, Aman ULg et al

Poster (2015, January 30)

Milk is a natural complex system present as oil in water emulsion. The natural organisation of milk fat globules is stabilized by the presence of a natural membrane, called the milk fat globule membrane ... [more ▼]

Milk is a natural complex system present as oil in water emulsion. The natural organisation of milk fat globules is stabilized by the presence of a natural membrane, called the milk fat globule membrane (MFGM). It has tripartite structure consisting of a monolayer facing the inner triacylglycerol core and an external bilayer. This MFGM accounts for 2-6% of fat globule. The MFGM is composed of both polar lipids and proteins. Cholesterol is also present in MFGM and accounts for about 2% of MFGM. Langmuir film balance is a technique to study monolayers and is a useful tool to examine the effect of cholesterol removal on surface properties of MFGM. β-cyclodextrin has no surface activity of its own and is thus a useful tool to study the effect of cholesterol desorption on surface properties in membrane. The removal of monolayer cholesterol to the sub-phase is proportional to the area decrease of the monolayer at a constant surface pressure. Amount of cholesterol removed can also be calculated as a function of mean molecular area at a given pressure, time and temperature. Using the monolayer technique, it is possible to study the interactions between β-cyclodextrin and MFGM film as well as effect of cholesterol removal in altering the surface properties MFGM. [less ▲]

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See detailUtility of removing cholesterol from an industrial by-product- Buttermilk powder
Malik, Priyanka ULg; Danthine, Sabine ULg; Paul, Aman ULg et al

Poster (2015, January 30)

Almost 16% of milk produced in European Union is being converted to butter. Buttermilk, is a low cost by-product from butter manufacture and available in large quantities but has been considered ... [more ▼]

Almost 16% of milk produced in European Union is being converted to butter. Buttermilk, is a low cost by-product from butter manufacture and available in large quantities but has been considered invaluable for many years. When cream is churned to butter the stable oil in water emulsion is destabilized and milk fat globule membrane (MFGM) is disrupted which is released in buttermilk. Thus, over the last two decades it has gained considerable attention due to its specific composition (proteins and polar lipids) attributed towards the MFGM. In account to this composition of buttermilk powder, it finds application in food industry as a natural stabilizing and emulsifying agent. It also finds application as a source of total solids and is commercially being added upto 10% in many food products. However, it has limitation in such applications due to the presence of cholesterol (approx. 80mg/100g). Cholesterol is also an integral part of MFGM and is released into buttermilk with MFGM. The most suitable techniques to remove cholesterol from buttermilk powder are using β-cyclodextrin and cholesterol oxidase enzyme. To valorize this abundantly produced industrial by-product of butter industry and increase its application in health food industry, as well as extend its application in pharmaceutical industry and preparation of liposomes, it is important to remove cholesterol from buttermilk. [less ▲]

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See detailNitrous oxide flux measurement with a closed chamber system : data treatment
Regaert, Donat ULg; Moureaux, Christine ULg; Heinesch, Bernard ULg et al

Poster (2015, January 30)

Nitrous oxide flux estimation from concentration measurements with a closed chamber system. Statistical data treatment to sort between relevant/irrelevant fluxes.

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