References of "2009"
     in
Bookmark and Share    
Full Text
See detailLaboratoire et allergologie : nouvelles applications
Gadisseur, Romy ULg; Cavalier, Etienne ULg

Conference (2009, December 17)

Detailed reference viewed: 14 (0 ULg)
Full Text
See detailDe la démarche scientifique face aux changements climatiques
Nicolay, Samuel ULg; Mabille, Georges ULg

Article for general public (2009)

Detailed reference viewed: 16 (3 ULg)
Full Text
See detailMitral valve dynamics in a closed-loop model of the cardiovascular system
Paeme, Sabine ULg; Chase, J. Geoffrey; Hann, Christopher et al

Poster (2009, December 17)

A cardiovascular and circulatory system (CVS) model has been validated in silico, and in several animal model studies. It accounts for valve dynamics by means of Heaviside function to simulate “open on ... [more ▼]

A cardiovascular and circulatory system (CVS) model has been validated in silico, and in several animal model studies. It accounts for valve dynamics by means of Heaviside function to simulate “open on pressure, close on flow” law. Thus, it does not consider the real time scale of the valve aperture and thus doesn’t fully capture valve dysfunction. This research couples the CVS model with a model describing the progressive aperture of the mitral valve. [less ▲]

Detailed reference viewed: 8 (4 ULg)
See detailL'empreinte sociétale : un nouvel indicateur de développement durable
Crutzen, Nathalie ULg

Scientific conference (2009, December 17)

Detailed reference viewed: 59 (5 ULg)
See detailCancer de la parathyroïde
Beckers, Albert ULg

Scientific conference (2009, December 17)

Detailed reference viewed: 12 (1 ULg)
See detailImages et inscriptions: la représentation de la guerre selon Harun Farocki
Hamers, Jérémy ULg

Conference (2009, December 16)

Detailed reference viewed: 13 (0 ULg)
See detailRecent development in the macromolecular engineering of functionalized aliphatic polyesters
Lecomte, Philippe ULg

Scientific conference (2009, December 16)

Detailed reference viewed: 30 (7 ULg)
See detailLe Secret des Géants
Beckers, Albert ULg

Scientific conference (2009, December 16)

Detailed reference viewed: 6 (0 ULg)
Full Text
See detailAspects nutritionnels des vaches laitières et autonomie alimentaire
Beckers, Yves ULg

Conference given outside the academic context (2009)

Detailed reference viewed: 10 (3 ULg)
Full Text
See detailVariation linguistique et signification sociale chez les jeunes Bruxelloises issus de l’immigration maghrébine. Analyse socio-phonétique de trois variantes non standard.
Audrit, Stéphanie ULg

Doctoral thesis (2009)

The present PhD research concerns three non-standard phonetic variants, known as specific to the adolescents from Moroccan immigration, and the meso-social meanings linked to these variants. The meso ... [more ▼]

The present PhD research concerns three non-standard phonetic variants, known as specific to the adolescents from Moroccan immigration, and the meso-social meanings linked to these variants. The meso-social level is defined here as the profiles or social personae (Coupland 2001). My hypothesis is that macro-socially homogeneous speakers use non standard variants according to their belonging to contrasted meso-social profiles. This problem is tackled through the analysis of authentic data, collected during a one-year ethnographic survey inside of two Brussels schools. These schools had a mostly female and immigrated population. Among the two of them, a peer group constituting a community of practice (Eckert 2000, 2005) was chosen as the focus of the study. This ethnographic gathering of data has a double aim: (i) first, it has to allow to determine what the profiles specific to the investigated peer groups are; (ii) secondly, a long-term survey must allow to collect speech as close as possible of the speakers’ vernacular. The three non standard variants are the followings: (i) The reduced vowels: they are strongly reduced vowels that can completely disappear from the sound signal, in very atypical positions according to standard French. (ii) The back /A/: these realisations of /A/ are characterized by the backing of their articulation point, whose consequence is to move their timbre closer to this of /ɔ/ ; (iii) The marked variants of /r/: this large designation includes trill fricatives and fricatives produced with a large amount of noise. Analyzing the meso-social meaning of non standard variants requires a double methodology, both qualitative and quantitative. The qualitative part concerns the analysis of ethnographic data (interviews and fieldwork notes). It leads to the discovery of three contrasted speaker profiles, that is to say the messing-up girls, the provocatives and the modests. In the second part of the analysis, the existence of a link between the different speaker profiles and the use of each of the marked variants was investigated through statistical independence tests (chi square tests). These tests underline that the reduced vowels and the marked variants of /r/ are more used by the messing-up and the provocative girls, that is to say to speaker profiles which distance the traditional Moroccan and Muslim values. At the opposite, the back /A/ seem to have a double face, because they are linked with two very different profiles, the provocatives and the modests. This variant is also often mentioned as characteristic of the lower class language (Jamin 2005). It seems thus that the back /A/ have multiple meanings, whose point in common would be pejoration. If we come back to the initial hypothesis, the use of marked variants thus appears to be linked to the speakers’ belonging to contrasted profiles. However, these profiles are not the only factor to have an influence: the results of the tests show that, jointly to the profiles, the school has also an influence on the use of marked variants. This importance of school was furthermore underlined by several researches in sociology of education, where it is known as the school composition effect (Dumay & Dupriez 2005, 2008). [less ▲]

Detailed reference viewed: 50 (13 ULg)
Full Text
See detailLA STEAM EXPLOSION : PRINCIPE ET ACTION SUR LES MATERIAUX LIGNOCELLULOSIQUES
Jacquet, Nicolas ULg; Blecker, Christophe ULg; Paquot, Michel ULg

Poster (2009, December 16)

La steam explosion est un procédé thermomécanochimique qui va permettre la déstructuration de la matière lignocellulosique par l’action combinée de la chaleur issue de la vapeur, des hydrolyses induites ... [more ▼]

La steam explosion est un procédé thermomécanochimique qui va permettre la déstructuration de la matière lignocellulosique par l’action combinée de la chaleur issue de la vapeur, des hydrolyses induites par la formation d’acides organiques et du cisaillement résultant de la chute brutale de pression. Le procédé est composé de deux phases distinctes. D’une part, le vapocraquage qui consiste à faire pénétrer par diffusion, puis à condenser, la vapeur sous haute pression à l’intérieur de la structure du matériau. L’eau condensée à température élevée va initier l’hydrolyse des groupements acétyles contenus dans les xylanes et induire la formation d’acides organiques. Selon la sévérité des conditions (pression, température), les acides vont catalyser l’hydrolyse des fractions hémicellulosiques, induire des modifications dans la structure des lignines et modifier le degré de cristallinité de la fraction cellulosique. D’autre part, la décompression explosive. Cette phase est provoquée par une chute brutale de pression qui va entraîner la revaporisation d’une partie de l’eau condensée. L’expension brutale de la vapeur va induire des forces de cisaillement qui vont modifier les propriétés physiques (granulométrie, surface spécifique, rétention d’eau…) du matériau. [less ▲]

Detailed reference viewed: 19 (6 ULg)
Full Text
Peer Reviewed
See detailHydrolysis of starch by sorghum malt for maltodextrin production
Ba, Khady ULg; Destain, Jacqueline ULg; Thonart, Philippe ULg

Poster (2009, December 16)

Maltodextrin is a mixture of saccharides with a molecular weight between polysaccharides and oligosaccharides with DE lower than 20. Maltodextrin is more soluble in water than native starches, also is ... [more ▼]

Maltodextrin is a mixture of saccharides with a molecular weight between polysaccharides and oligosaccharides with DE lower than 20. Maltodextrin is more soluble in water than native starches, also is cheaper in comparison with other major edible hydrocolloids. Maltodextrin is obtained by moderate enzymatic or acidic hydrolysis of starch. The hydrolysis of starch, catalyzed by amylases, is the most important commercial enzyme process. The hydrolyzed products are widely applied in food, paper and textile industries. Because of the increasing demand for these enzymes in various industries, there is enormous interest in developing enzymes with better properties, such as raw starch-degrading amylases suitable for industrial applications and their cost-effective production techniques. Sorghum (Sorghum bicolor) is a widely grown crop in Africa. Obtaining enzymes from sorghum requires a transformation. The objective of this study was application of sorghum amylase for maltodextrin. Sorghum seeds were supplied by the ISRA (Bambey, Senegal). Seeds were germinated in the laboratory at 30°C for 72 h and the sorghum malt was dried at 40°C for 48 h. Corn starch (from Roquette, France) hydrolysis was assayed in a bioreactor of 2 l at a temperature of 65°C gently stirred. Raw starch was slurried in water (30% w/v) and sorghum malt was introduced, chloride calcium was added, pH was adjusted to 6. Maltodextrin was characterized in term of the dextrose equivalent (DE) during the hydrolysis. The yield of hydrolysis was evaluated by soluble solids (° BRIX) at different hydrolysis time. The glucose concentration released was measured by DNS method (Miller method). [less ▲]

Detailed reference viewed: 93 (4 ULg)