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See detailA study of the quantitative content of thiamine triphosphate in different biological objects by high-performance liquid chromatography
Makarchikov, Alexander F; Bettendorff, Lucien ULg

in News of Biomedical Sciences (2004), 2

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See detailPurification and characterization of glutathione S-transferases from two syrphid flies (Syrphus ribesii and Myathropa florae).
Vanhaelen, Nicolas; Francis, Frédéric ULg; Haubruge, Eric ULg

in Comparative Biochemistry & Physiology Part B (2004), 137(1), 95-100

Glutathione S-transferases (GST) play an important role in the detoxification of many substances including organic pollutants and plant secondary metabolites. We compared the GST of two syrphid species ... [more ▼]

Glutathione S-transferases (GST) play an important role in the detoxification of many substances including organic pollutants and plant secondary metabolites. We compared the GST of two syrphid species, the aphidophagous Syrphus ribesii and the saprophagous Myathropa florea to assess the relation between feeding type and GST patterns. Differences between the GST of the hoverfly species were observed after purification by affinity chromatography, SDS-PAGE and kinetic studies. While the specific activities of the purified enzymes were different, the purification yields were similar. The variation in specific activities was related to the presence of different isoenzymes in both syrphid species by SDS-PAGE. While two bands of 24 and 32 kDa were observed for M. florea, one more band of 26 kDa was present in S. ribesii. When a range of substrate and glutathione concentrations was tested, differences in Km and Vmax between the glutathione S-transferases from both hoverfly species were also observed. These results are discussed in terms of adaptations to the feeding habit and the habitat of the two syrphid species. [less ▲]

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See detailLarge-distance effects on spin observables at RHIC
Selyugin, Oleg V; Cudell, Jean-René ULg; Predazzi, E.

in Aulenbacher, K.; Bradamante, F.; Bressan, A. (Eds.) et al 16th International Spin Physics Symposium (SPIN 2004) (2004)

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See detailSaturation and non-linear effects in diffractive processes
Selyugin, Oleg V; Cudell, Jean-René ULg

in Burdik, C. (Ed.) 11th International Conference On Symmetry Methods In Physics (SYMPHYS-11) (2004)

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See detailA simple model for generalised parton distributions of the pion
Lansberg, Jean-Philippe ULg; Bissey, F.; Cudell, Jean-René ULg et al

in Bruncko, D.; Ferencei, J.; Strizenec, P. (Eds.) 12th International Workshop On Deep Inelastic Scattering (DIS 2004) (2004)

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See detailIntegral and derivative dispersion relations, analysis of the forward scattering data
Martynov, E.; Cudell, Jean-René ULg; Selyugin, Oleg V

in Eur. Phys. J. (2004), C33

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See detailFinite element computation of electromechanical micro-switches and micro-pump actuators
Lejeune, Jean-Michel; Rochus, Véronique ULg; Golinval, Jean-Claude ULg

Conference given outside the academic context (2004)

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong ... [more ▼]

a new methodology to model the electromechanical behavior of microscale system components is presented. The original approach proposed in this paper is based on a unified FE formulation of the strong electromechanical interaction problem, in which both the electric and the mechanical fields are considered simultaneously. To this aim, finite elements based on the Mindlin shell theory are implemented. In order to illustrate the proposed methodology, numerical results are presented on the modelling and simulation of microscale electromechanical switches and microscale pump actuators. [less ▲]

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See detailTransposition de la Directive Nitrate (CE) en Région wallonne : azote potentiellemnt lessivable de référence pour les sols cultivés en Région wallonne
Vandenberghe, Christophe ULg; Marcoen, Jean Marie ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2004), 8

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See detailSeismic Design and Performance of Composite Frames
Thermou, G.; Elnashai, A. S.; Plumier, André ULg

in Journal of Constructional Steel Research (2004), (60),

In this study, the seismic design and performance of composite steel-concrete frames are studied. The new Eurocode 4 and Eurocode 8, which are in a preliminary stage at the moment, are employed for the ... [more ▼]

In this study, the seismic design and performance of composite steel-concrete frames are studied. The new Eurocode 4 and Eurocode 8, which are in a preliminary stage at the moment, are employed for the design of six composite steel-concrete frames. The deficiencies of the codes and the clauses that cause difficulties to the designer are discussed. The inelastic static pushover analysis is employed for obtaining the response of the frames and the overstrength factors. The evaluation of the response modification factor takes place by performing incremental time-history analysis up to the satisfaction of the yield and collapse limit states in order to investigate the conservatism of the code. The last purpose of this study is to investigate if elastically designed structures can behave in a dissipative mode. [less ▲]

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See detailCaractérisation écologique de la pollinisation des Iris Oncocycles endémiques du Liban
Monty, Arnaud ULg

Master's dissertation (2004)

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de ... [more ▼]

Les Iris Oncocycles libanais sont des espèces montagnardes, endémiques et menacées. Dans un cadre général de mise au point d’une stratégie de conservation, le système reproducteur et le système de pollinisation de ces végétaux ont été caractérisés. L’essentiel des observations a porté sur une espèce type : Iris cedretii Dinsmore ex Chaudhary, dont deux populations distinctes ont été répertoriées. Des observations complémentaires ont été faites sur une population d’Iris sofarana subsp. kasruwana Dinsmore ex Chaudhary. Les Oncocycles libanais sont des végétaux allogames stricts, et la fleur est réceptive pendant cinq jours, au plus. Des séances d’observation et de récoltes entomologiques ont été effectuées de jour, par différentes conditions climatiques. Elles ont mis en évidence le rôle des abeilles mâles du genre Xylocopa dans la pollinisation, et le faible taux de visite global des Iris. Des séances d’échantillonnage au sein des fleurs, de jour et de nuit, ont permis de jauger l’importance du phénomène de refuge. Quantitativement, le refuge concerne surtout les abeilles mâles du genre Eucera, mais une faune diversifiée trouve abri dans les fleurs. Afin de comprendre plus précisément le phénomène, des observations matinales et des mesures de températures, notamment intra-florales, ont été menées. Des quantifications de pollen sur les insectes ont permis de valider le rôle de ceux-ci comme pollinisateurs. Les Iris Oncocycles libanais ont un système de pollinisation double. Il est basé, d’une part, sur les transfert polliniques dus au va-et-vient des réfugiés. D’autre part, des déplacements de pollen sont assurés par les Xylocopes, apparemment attirés au sein du tube floral par une tromperie sexuelle. Cette duperie fait intervenir la tache « onco », sur le labelle, qui est caractéristique de la section Oncocyclus. [less ▲]

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See detailFinite element modelling of ion convection by electrostatic forces
Deliège, Geoffrey ULg; Henrotte, François; Deprez, Wim et al

in IET Science, Measurement & Technology (2004), 151(6), 398-402

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See detailThe eggshell approach for the computation of electromagnetic forces in 2D and 3D
Henrotte, François; Deliège, Geoffrey ULg; Hameyer, Kay

in COMPEL (2004), 23(4), 996-1005

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See detailPlatelet expression of non-functional P2X1delL ion channels in mice reduces arterial thrombosis
Oury, Cécile ULg; Daenens, Kim; Feijge, Marion et al

in Haematologica (2004)

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See detailLes déficits phonologiques des enfants francophones ayant des troubles spécifiques de développement du langage
Parisse, Christophe; Maillart, Christelle ULg

in Glossa (2004), 89

This study investigated the phonological expressive disorders of Frenchspeaking children with SLI. The main goal of this paper was to confirm whether children with SLI have limitations in phonological ... [more ▼]

This study investigated the phonological expressive disorders of Frenchspeaking children with SLI. The main goal of this paper was to confirm whether children with SLI have limitations in phonological ability even when they are compared with normally-developing children matched by MLU and phonemic inventory size. This was demonstrated by Bortoloni and Leonard (2000), Orsolini et coll. (2001), and Aguilar-Mediavilla et coll. (2002), which obtained the most detailed results in this direction, but it was never tested in French language. The second goal of the paper is to find out whether the characteristics of the French language are reflected in the nature of the children’s phonological disorder. In order to test this, the spontaneous language of 16 children with SLI and of 16 control children matched on MLU and phonemic inventory size (NLD group) was analysed using different measures bearing on utterances, words, syllables, or phonemes. In both SLI and NLD groups, the children were distributed in two different subgroups, on the basis of their MLU and phonemic inventory size. The results supported a specific limitation in the phonological abilities of French children with SLI, as was already demonstrated for English, Hebrew, Italian, and Spanish-Catalan. However, two unexpected results were also obtained. Firstly, a significant difference between children with SLI and control children could only be found for older children (MLU above 3), not for younger children with MLU below 3. This was true for all measures. This finding stresses out the importance of having a development perspective and has to be confirmed with longitudinal design. Secondly, deficits were much more important at the phoneme level than at the syllable level. This can be explained by the fact that the French language has a very homogenous pronunciation of syllables, which makes them easier to segment. [less ▲]

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See detailLe coût cognitif des processus orthographiques
Schelstraete, Marie-Anne; Maillart, Christelle ULg

in Glossa (2004), 89

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See detailLe texte dans tous ses états. Philosophie d’encodage du projet Khartês
Mazziotta, Nicolas ULg

in Dister, Anne; Purnelle, Gérald; Fairon, Cédrick (Eds.) Le poids des mots. Actes des 7es Journées internationales d’Analyse statistique des Données Textuelles (2004)

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to ... [more ▼]

When editing Medieval sources, one always encounters the same dilemma : how to make the text readable nowadays without spoiling its testimony ? « Cleaning » the text from all that makes it difficult to read for someone erases marks that would look valuable from another point of view. Hence, there is an unavoidable gap between the source and the edition. The Khartês project (which intends to edit and study original Old French charters written in Liège before 1300) has encountered this problem. Traditional « solutions » were inadequate and computers opened an interresting path. However, Khartês had to think about creating an encoding scheme that would suit its aim and remain easy to use. This is the way KML (the Khartês Markup Language, an XML-conformant language) was born, together with a small set of handy encoding rules. A wide range of applications are made possible. For instance, thanks to the way the corpus has been created, it has been possible to search a particular document for marked letters (which look like our uppercase letters) and to study them. [less ▲]

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See detailGenome scan for familial abdominal aortic aneurysm using sex and family history as covariates suggests genetic heterogeneity and identifies linkage to chromosome 19q13.
Shibamura, Hidenori; Olson, Jane M; van Vlijmen-Van Keulen, Clarissa et al

in Circulation (2004), 109(17), 2103-8

BACKGROUND: Abdominal aortic aneurysm (AAA) is a relatively common disease, with 1% to 2% of the population harboring aneurysms. Genetic risk factors are likely to contribute to the development of AAAs ... [more ▼]

BACKGROUND: Abdominal aortic aneurysm (AAA) is a relatively common disease, with 1% to 2% of the population harboring aneurysms. Genetic risk factors are likely to contribute to the development of AAAs, although no such risk factors have been identified. METHODS AND RESULTS: We performed a whole-genome scan of AAA using affected-relative-pair (ARP) linkage analysis that includes covariates to allow for genetic heterogeneity. We found strong evidence of linkage (logarithm of odds [LOD] score=4.64) to a region near marker D19S433 at 51.88 centimorgans (cM) on chromosome 19 with 36 families (75 ARPs) when including sex and the number of affected first-degree relatives of the proband (N(aff)) as covariates. We then genotyped 83 additional families for the same markers and typed additional markers for all families and obtained a LOD score of 4.75 (P=0.00014) with sex, N(aff), and their interaction as covariates near marker D19S416 (58.69 cM). We also identified a region on chromosome 4 with a LOD score of 3.73 (P=0.0012) near marker D4S1644 using the same covariate model as for chromosome 19. CONCLUSIONS: Our results provide evidence for genetic heterogeneity and the presence of susceptibility loci for AAA on chromosomes 19q13 and 4q31. [less ▲]

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See detailDeep drawing simulations with different polycrystalline models
Duchene, Laurent ULg; de Montleau, P.; Bouvier, S. et al

in Gosh, Somnath; Castro, Jose M.; Lee, June K. (Eds.) Materials Processing and Design: Modeling, Simulation and Applications (NUMIFORM 2004) (2004)

The goal of this research is to study the anisotropic material behavior during forming processes, represented by both complex yield loci and kinematic-isotropic hardening models. A first part of this ... [more ▼]

The goal of this research is to study the anisotropic material behavior during forming processes, represented by both complex yield loci and kinematic-isotropic hardening models. A first part of this paper describes the main concepts of the ‘Stress-strain interpolation’ model that has been implemented in the non-linear finite element code Lagamine. This model consists of a local description of the yield locus based on the texture of the material through the full constraints Taylor’s model. The texture evolution due to plastic deformations is computed throughout the FEM simulations. This ‘local yield locus’ approach was initially linked to the classical isotropic Swift hardening law. Recently, a more complex hardening model was implemented: the physically-based microstructural model of Teodosiu. It takes into account intergranular heterogeneity due to the evolution of dislocation structures, that affects isotropic and kinematic hardening. The influence of the hardening model is compared to the influence of the texture evolution thanks to deep drawing simulations. [less ▲]

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See detailDeep drawing process with different elasto-plastic law
de Montleau, P.; Duchene, Laurent ULg; Bouvier, S. et al

in Stören, Sigurd (Ed.) Proceedings of the 7th ESAFORM conference on Material Forming (2004)

Recently, a combination of a texture based yield locus and of the Teodosiu's hardening model has been implemented in the Finite Element code LAGAMINE of the department M&S of the University of Liège. The ... [more ▼]

Recently, a combination of a texture based yield locus and of the Teodosiu's hardening model has been implemented in the Finite Element code LAGAMINE of the department M&S of the University of Liège. The yield locus is able to take into account the texture updating during a FE simulation. The texture evolves with respect to the crystalographic rotations due to the plastic deformations. Two hardening models are considered: the classical Swift istropic hardening model and the Teodosiu's hardening model that is a physically-based microstructural model. It takes into account intergranular heterogeneity due to the evolution of dislocation structures, that affects the isotropic and the kinematic hardening. The aim of the paper is to compare the influence of the hardening with the influence of the yield shape updating due to the texture evolution, on the final plastic anisotropy, for a deep drawing simulation. The tests are performed for the steel FeP06t that presents a non negligible initial anisotropy. [less ▲]

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See detailLocalizable effective theories, bootstrap and the parameters of hadron resonances
Semenov-Tyan-Shanskiy, Kirill ULg; Vereshagin, Alexander; Vereshagin, Vladimir

in AIP Conference Proceedings (2004), 717

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