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Results 2341-2360 of 9754.
  Termites as a tool to improve lignocellulose biomass valorization : study of enzymatic complex in termites and its common symbionts by comprehensive metabolite profilingBrasseur, Catherine  ; Bauwens, Julien ; Tarayre, Cédric et alConference (2012, November 16) Detailed reference viewed: 29 (12 ULg)Shell cross-linked stimuli-responsive micelles as vehicles for biomedical applicationsLiu, Ji ; Detrembleur, Christophe ; Debuigne, Antoine et alConference (2012, November 16) Detailed reference viewed: 15 (1 ULg)Synthesis and physico-chemical characterization of fatty estersSainvitu, Pauline ; Nott, Katherine ; Nicks, Francois et alPoster (2012, November 16) Specific antioxidant molecules (e.g. phenolics) help to prevent oxidation reaction of the cell membrane. A fatty chain grafted on these compounds should enhance their capacity to interact with the ... [more ▼] Specific antioxidant molecules (e.g. phenolics) help to prevent oxidation reaction of the cell membrane. A fatty chain grafted on these compounds should enhance their capacity to interact with the membrane lipids. In our study, three fatty esters comprising an aromatic part were synthesized. They differentiate the aromatic substituent and the number of carbons between the aromatic ring and the ester function. A structure-function relationships study was performed to identify the structural pattern affecting the interfacial properties and the membrane interaction properties. The behavior of their monolayer film at an air-water interface was studied. The interactions with membrane were assessed on living cells and were predicted by a computational approach. In the future, we will investigate the effect of the presence of a sugar unit on these molecules. [less ▲] Detailed reference viewed: 13 (5 ULg)Perpectives for Technology Assessment in Wallonia: a "Country" Case StudyDelvenne, Pierre ; Rosskamp, Benedikt Conference (2012, November 15) Detailed reference viewed: 6 (1 ULg) Analysis of the diastereoisomers of alliin by HPLCDETHIER, Bérénice ; Laloux, Morgan ; et alin Talanta (2012), 101 Garlic has been known for its therapeutic effects for centuries and is used worldwide as a functional food. The concentration of the active molecules could be enhanced by a better knowledge of their ... [more ▼] Garlic has been known for its therapeutic effects for centuries and is used worldwide as a functional food. The concentration of the active molecules could be enhanced by a better knowledge of their biosynthesis. The precursor of these compounds, alliin (a sulfur amino-acid) has been obtained by chemical synthesis. However, this synthesis route also leads to a diastereoisomer as co-product. This work describes the development of an analytical method which allows the separation and quantification of the two diastereoisomers in order to determine in which proportion the natural form can be produced. The HPLC method which was optimized and validated by accuracy profile exploits an original stationary phase consisting of porous graphitic carbon (PGC). Furthermore, the developped method was used to separate the diastereoisomers of methiin, another garlic cysteine sulfoxide, and to analyse and aqueous extract of garlic. The ability to quantify the amount of natural alliin is valuable for further work on garlic molecules and their application for health protection. [less ▲] Detailed reference viewed: 54 (19 ULg)Double stigmatisation dans la maladie d'AlzheimerAdam, Stéphane Scientific conference (2012, November 15) Detailed reference viewed: 29 (1 ULg)Cône de pollution à Lubumbashi: mise en évidence à partir de la structure spatiale de la végétation et de la perception paysagèreVranken, Isabelle Speech (2012) In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known ¿Copper Belt¿. Due to the dominant ... [more ▼] In the south-eastern part of the Katanga Province (Democratic Republic of the Congo), high concentrations of copper and cobalt are found in the soils of the well-known ¿Copper Belt¿. Due to the dominant south-eastern winds, the metallurgic industry in Lubumbashi has been the source of a spatially concentrated atmospheric deposits of non-ferrous metal particles and associated substances in a cone-shaped zone, situated north-west of the metal processing site. The existence of this zone has been evidenced using two different techniques: firstly, by means of landscape metric comparisons of the vegetation and bare soil patterns in two study areas, one inside the pollution cone and one outside; secondly, by means of the theory on city perception developed by Kevin Lynch. Higher fragmentation and lower vegetation presence were observed inside the pollution cone, reflecting the negative impact of atmospheric deposits. Those differences were higher for sites closer to the emission source. Lynch¿s approach outlined the negative impact of diverse industrial plants on the perception by the local population. Six pollution districts and several contaminated paths, limits, nodes and polluting landmarks were identified. Citizens even recognize them as part of the collective image of the city. [less ▲] Detailed reference viewed: 17 (0 ULg)Mapping overland flow hazard in order to enhance citizens’ awareness of head catchment hydrologyPineux, Nathalie ; ; Degré, Aurore Conference (2012, November 15) Between 1998 and 2004, Europe suffered from more than hundred major inundations, responsible for some 700 deaths, for the moving of about half a million of people and the economic losses of at least 25 ... [more ▼] Between 1998 and 2004, Europe suffered from more than hundred major inundations, responsible for some 700 deaths, for the moving of about half a million of people and the economic losses of at least 25 billions Euros covered by the insurance policies. Within this context, EU launched the 2007/60/CE directive. This directive aims at a better evaluation of the risks and a better coordination of prevention, protection and crisis management. In most countries, inundation maps only include rivers’ overflowing. In Wallonia (southern part of Belgium), it was decided to include overland flows and mudflows in the flood hazard map. Indeed, the cleaning operations for a village after a storm can lead to an estimated cost of 11 000 €. Average construction cost of retention dams to control off-site damage caused by floods and muddy flows was valued at 380 000€, and yearly dredging costs associated with these retention ponds at 15 000€. A specific study in Gembloux (25 000 inhabitants) estimated the mean annual cost for the runoff damages to 20 000€. This cost only consists of the physical damages caused to the settlements and movable properties of the residents as well as the emergency operations of the firemen and the city. On top of damages to public infrastructure (clogging of trenches, silting up of retention ponds) and to private property, runoff and mud flows generate a significant loss of arable land. Yet, the soil is not an unlimited resource. Moreover, sediments’ transfer to watercourses alters their physical and chemical quality. And that is not to mention the increased psychological stress for people. But head catchment hydrology is not well known. Mapping the overland flood and mud flow hazard over a 17000 km² region is a real challenge. This contribution will present the pragmatic methodology used in Wallonia. In accordance with the Directive, different maps are produced (25, 50 and 100 years of return period and an extreme scenario). Local characteristics are taken into account: rainfall statistics, soil data, land use and relief. They are used to assess runoff production and transfer to an outlet identified as the point where runoff enters the permanent river network. Peak discharge values are used as basis for the mapping. The maps locate the water paths using a colour chart based on the peak discharge. Summer 2011 and spring 2012 storm events as well as a survey made at the municipalities’ level allowed us to validate in some ways the maps produced. Whereas this first approach at regional scale includes uncertainties, the aim of these maps is currently to prompt recognition of the runoff inundation hazard. It is of major importance for soil conservation and citizens’ protection. Above all, it should contribute to lower the damages by early prevention during the design of town-planning projects. [less ▲] Detailed reference viewed: 22 (7 ULg)La signification dans la représentation graphique du projet d'opération urbaineBoutemadja, Abdelkader Poster (2012, November 15) La signification dans la représentation graphique du projet d'opération urbaine Detailed reference viewed: 27 (4 ULg)Food-web including Harmonia axyridis Pallas (Coleoptera: Coccinellidae) in field cropsVandereycken, Axel ; Joie, Emilie ; Francis, Frédéric et alPoster (2012, November 15) Detailed reference viewed: 23 (3 ULg)Trained Singers CorpusLarrouy, Pauline Computer development (2012) Two songs (Happy Birthday and a chosen romantic melody) were performed by 50 trained singers aged from 19 to 66 years old (on average: 36.94). These 38 women and 12 men began their musical education ... [more ▼] Two songs (Happy Birthday and a chosen romantic melody) were performed by 50 trained singers aged from 19 to 66 years old (on average: 36.94). These 38 women and 12 men began their musical education between 6 and 49 years old (on average: 20.18) and have a musical background of 5 to 51 years (on average: 19.86). They practice 13.68 hours per week, on average. After the production of two glissandi, the participants were asked to sing the French version of the popular tune “Happy Birthday”, without a compulsory tonality, two times. For the first time they were instructed to sing "naturally" (sequence a) and then to sing with an operatic singing technique "like on stage" (sequence b). Each participant chose a romantic melody from their musical repertory and sang this melody three times: "naturally" (sequence c), with an operatic singing technique (sequence d) and with closed mouth "humming" (sequence e). The performance order was similar for each trained singer (sequence a, e, c, d, b). [less ▲] Detailed reference viewed: 24 (3 ULg)Therapeutic compounds in garlic oil: production and evolution after preparationDETHIER, Bérénice ; Fauconnier, Marie-Laure Poster (2012, November 15) Allyl sulfides, the main constituents of garlic oil, have been studied in the past decades for their effects against cancer. Since cancers are not all healed, ways to prevent it, especially with natural ... [more ▼] Allyl sulfides, the main constituents of garlic oil, have been studied in the past decades for their effects against cancer. Since cancers are not all healed, ways to prevent it, especially with natural products that could be included in food preparation, are more than welcome. The synthesis and separation of allyl sulfides can provide larger amount of allyl sulfide than the extraction in order to make biological tests. Furthermore, the improvement of the synthesis conditions helps the understanding of the formation of allyl sulfide while garlic is processed. Finally, the study of the products allows a deeper understanding of the conversion between the allyl sulfides. A parallel can then be done with the conservation conditions of garlic-based products. The first part of this work describes the synthesis optimization using the design of experiment. The reaction of allyl bromide and sodium disulfide was carried under different conditions: the reaction duration, the heating (in microwave oven or in oil bath, at different temperature), the presence of catalyst, and the agitation were assessed. In the second part of the study, extractions are performed on garlic. The composition of the extracts is followed during time under the conditions established in the first part. The results give an optimized way to synthesize allyl sulfides, as much as an idea of the reactions happening on them in garlic preparations under various conditions. [less ▲] Detailed reference viewed: 21 (3 ULg)Upwelling, filament and eddies in the Canary Current upwelling system during the CAIBEX cruise (Summer 2009)Troupin, Charles ; ; et alPoster (2012, November 15) Detailed reference viewed: 16 (1 ULg)La médiation scolaire : un concept au singulier, des solutions singulièresDubois, Christophe ; Dethier, Baptiste ; Gérard, Julie et alScientific conference (2012, November 15) Partir à la recherche de la médiation scolaire suppose l’adoption d’une stratégie de recherche. Après avoir suivi le travail des personnes porteuses du titre de médiateur scolaire (Kuty et al., 2011 ... [more ▼] Partir à la recherche de la médiation scolaire suppose l’adoption d’une stratégie de recherche. Après avoir suivi le travail des personnes porteuses du titre de médiateur scolaire (Kuty et al., 2011), nous présenterons ici les résultats d’une démarche ayant consisté à étudier les pratiques et les dispositifs de médiation tels qu’ils sont mis en place dans les écoles. Cette démarche de recherche a été mise en oeuvre au sein de six établissements scolaires belges francophones et nous a conduits à décomposer le concept abstrait et insuffisamment défini de médiation scolaire. En effet, les acteurs du monde scolaire font face, dans leur travail, à différents problèmes concrets auxquels ils tentent d’apporter des solutions concrètes. Alors que le discours de certains acteurs et experts qualifie (trop) rapidement ces solutions à l’aide du concept (systématiquement employé au singulier) de médiation, nous nous attacherons à rendre compte des acteurs, des pratiques et des interactions qui (co)-produisent ces solutions singulières. [less ▲] Detailed reference viewed: 60 (17 ULg)Generation of analysis and consistent error fields using the Data Interpolating Variational Analysis (Diva)Troupin, Charles ; Ouberdous, Mohamed ; Barth, Alexander et alPoster (2012, November 15) Detailed reference viewed: 16 (3 ULg) Nutritive value of four tropical forage legume hays fed to pigs in the Democratic Republic of CongoKambashi Mutiaka, Bienvenu ; Boudry, Christelle ; Picron, Pascale et alConference (2012, November 15) The incorporation of fibrous feed ingredients such as legume forages in the diets of pigs can be economically interesting due to their low cost and the fact that they do not compete with human food ... [more ▼] The incorporation of fibrous feed ingredients such as legume forages in the diets of pigs can be economically interesting due to their low cost and the fact that they do not compete with human food. Psophocarpus scandens and Vigna unguiculata are potential protein pig resources. Due to their negative effect on the overall digestibility of the diets, the contribution of tropical forage legumes to the diet should not exceed 25 %. TFL can be potential sources of protein for small scale tropical pig farms, preferably in adult pigs. [less ▲] Detailed reference viewed: 25 (7 ULg)Et pratiquement, je fais quoi ? De la veille à l’étude de marchéBrandt, Céline ; Gruslin, Claire Conference given outside the academic context (2012) L'objectif de cette intervention était de faire le lien entre le concept de veille stratégique et ses composantes (socio-éco, concurrentielle, technologique, juridique et fiscale, réputation et l’image ... [more ▼] L'objectif de cette intervention était de faire le lien entre le concept de veille stratégique et ses composantes (socio-éco, concurrentielle, technologique, juridique et fiscale, réputation et l’image, et veille de marché) et le concept d'étude de marché. Partant du constat que l'étude de marché est peu ancrée dans la culture des PME wallonnes, cette allocution visait à proposer des méthodes de collecte et d’analyse des données adaptées aux différents besoins en information. [less ▲] Detailed reference viewed: 13 (0 ULg)Synthesis of new biomimetic and biodegradable polymers for clinical useClement, Benoît ; Grignard, Bruno ; et alConference (2012, November 15) Detailed reference viewed: 16 (1 ULg)Meinongian Logics and their limits. The need for two kinds of predicates, two kinds of predications and two kinds of objectsLeclercq, Bruno Scientific conference (2012, November 15) Detailed reference viewed: 13 (0 ULg) |
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