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See detailEfficacy of diatomaceous earth formulations admixed with grain against populations of Tribolium castaneum
Arnaud, Ludovic; Lan, H. Tran Thi; Brostaux, Yves ULg et al

in Journal of Stored Products Research (2005), 41(2), 121-130

The efficacy of diatomaceous earth (DE) to control stored-products Coleoptera on stored grain was examined against several populations of the red flour beetle, Tribolium castaneum (Herbst). Four ... [more ▼]

The efficacy of diatomaceous earth (DE) to control stored-products Coleoptera on stored grain was examined against several populations of the red flour beetle, Tribolium castaneum (Herbst). Four commercially available DE formulations were tested: INSECTO(R), Perma-Guard(TM), Protect-It(R) and the diatomite used for the production of Dryacide(R), each at six concentrations (100-1000ppm). A great variation of efficacy was observed among the DE formulations tested. Protect-It at concentrations up to 400 ppm was found to be the most effective formulation to control red flour beetle populations. However, a concentration of 1000 ppm of Protect-It was necessary to control all adults of all populations. Most T castaneum populations, except one from Ivory Coast (Asm), were more than 90% controlled with INSECTO and Dryacide DE at 600 ppm. At this concentration, about 88% and 22% Asm adults died with INSECTO and Dryacide DE, respectively. Perma-Guard was the least efficient DE formulation to control T castaneum adults with three populations exhibiting some survival at 1000 ppm. Reduced susceptibility to DE was observed in two populations, Asm and Lab susceptible from Kansas (Lab-S). As neither population had been previously exposed to DE, it is suggested that red flour beetles may naturally vary in susceptibility to DE. In addition, it was found that some populations can be satisfactorily controlled with some DE formulations but not with others. (C) 2003 Elsevier Ltd. All rights reserved. [less ▲]

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See detailFrasnian carbonate buildups of southern Belgium: the Arche and Lion members interpreted as atolls
Boulvain, Frédéric ULg; Demany, B.; Coen-Aubert, M.

in Geologica Belgica (2005), 8(1-2), 69-91

The facies architecture, sedimentary dynamics and paleogeographic evolution were reconstructed for a number of Frasnian buildups developed on a carbonate platform on the south side of the Dinant ... [more ▼]

The facies architecture, sedimentary dynamics and paleogeographic evolution were reconstructed for a number of Frasnian buildups developed on a carbonate platform on the south side of the Dinant Synclinorium (Belgium). Bed-by-bed sampling and detailed petrography were complemented by magnetic susceptibility analysis, allowing for high-precision lateral correlation. Six facies were recognised in the buildups, each characterized by a specific range of textures and assemblage of organisms: grey, pinkish or greenish limestone, with stromatactis, corals and stromatoporoids (facies A3-L3); grey limestone with corals, peloids and dasycladales (facies A4-L4); grey, microbial limestone (facies A5-L5); grey limestone with dendroid stromatoporoids (facies A6-L6); grey, laminar fenestral limestone, (facies A7-L7); grey, bioturbated limestone (facies A8-L8). The time-equivalent off -buildup sediments include a large amount of transported material that originally came from the buildups. Sedimentological evidence suggests that facies A3-L3 developed between the storm wavebase and the fairweather wavebase, in a oligophotic environment. This facies contains lenses of facies A5-L5, with stromatolitic coatings and Renalcis-rich thrombolitic bushes. These lenses were developed in greatest abundance closest to the fairweather wavebase, and they became anastomosing. Facies A6-L6 was developed in an environment with slightly restricted water circulation; there is a steady transition between this facies and the fenestral limestone A7-L7, which were deposited in a moderately protected subtidal to intertidal area. Facies A8-L8 developed at subtidal depths in a quiet, lagoonal environment. The buildups started with the development of facies A3-L3, with microbial lenses and algal facies becoming progressively more abundant upwards. Above about 20m in each buildup, more protected facies are found in the buildup’s central part. This atoll-like geometry suggests the development of restricted sedimentation in this central area, sheltered by bindstone or floatstone facies. The initial development of the lower part of a buildup during a transgression and subsequent highstand would have been followed by reefal growth along the edge of the buildup during the succeeding lowstand; an atoll crown would then have started to develop during the following transgressive stage. The presence of restricted facies can be seen as the consequence of the balance between sea level rise and reef growth. [less ▲]

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See detailUtilisation raisonnable des gonadotrophines exogènes dans le contrôle de la reproduction
Drion, Pierre ULg

in Folia Veterinaria (2005)

De nombreuses substances pharmacologiques (tableau 1) incluant des stéroïdes, des peptides et des glycoprotéines potentiellement immunogènes sont fréquemment utilisées dans les programmes thérapeutiques ... [more ▼]

De nombreuses substances pharmacologiques (tableau 1) incluant des stéroïdes, des peptides et des glycoprotéines potentiellement immunogènes sont fréquemment utilisées dans les programmes thérapeutiques ou de gestion de la reproduction chez les animaux domestiques et dans les programmes de procréation assistée chez l'homme. De nombreuses investigations non invasives ont été menées dans différentes espèces en vue de récolter des informations objectives sur les effets secondaires possibles d'administrations répétées de gonadotrophines exogènes, tels la présence d'anticorps circulants et la diminution de la réponse biologique aux traitements. De manière synthétique, il apparaît que l'exposition répétée d'un animal à une molécule gonadotrope exogène, entraîne chez celui-ci la formation d'anticorps spécifiques dirigés contre cette molécule. Cependant, les taux de liaison des anticorps plasmatiques aux gonadotrophines injectées ne suffisent pas à expliquer l'intégralité d'une modification des performances de reproduction. La littérature portant sur les programmes d'immunisation contre les stéroïdes ou l'inhibine -utilisés pour améliorer les performances de reproduction- constitue une bonne illustration du contrôle multifactoriel de telles régulations et de la difficulté à obtenir les effets souhaités. [less ▲]

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See detailEndogenous erythropoietin in the anemia of chronic disorders
Beguin, Yves ULg

in Weiss, W.; Gordeuk, V. R.; Hershko, C. (Eds.) Anemia of chronic disease (2005)

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See detailErythropoietic agents and iron
Beguin, Yves ULg

in Aapro, M.; Bokemeyer, C.; Ludwig, H. (Eds.) ESO Scientific Updates, Vol. 6 (2nd ed). Anaemia in cancer (2005)

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See detailDémocratie(s) européenne(s)
Matagne, Geoffroy ULg

in Cahiers de Sciences Politiques de l'ULg (2005), 3

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See detailTraitement biologique d’un effluent de l’industrie des olives
Alloue; Aldric, Jean-Marc ULg; Destain, Jacqueline ULg et al

in Tribune de l'Eau (La) (2005)

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See detailL'aulne glutineux : ses stations et sa sylviculture
Claessens, Hugues ULg

Book published by Forêt Wallonne asbl (2005)

S'il est bien un arbre qui symbolise à lui seul l'évolution actuelle de la gestion forestière vers une plus grande multifonctionnalité, c'est bien l'aulne glutineux. Espèce de première importance dans des ... [more ▼]

S'il est bien un arbre qui symbolise à lui seul l'évolution actuelle de la gestion forestière vers une plus grande multifonctionnalité, c'est bien l'aulne glutineux. Espèce de première importance dans des écosystèmes de grand intérêt, pour la conservation de la biodiversité ou encore pour la protection des sols et des ressources en eau, l'aulne, bien conduit par le sylviculteur, peut aussi produire un bois de haute qualité. Dans ce contexte, cet ouvrage rassemble les connaissances de base nécessaires à une bonne utilisation de l'aulne glutineux dans la sylviculture : biologie, croissance et production, caractéristiques du bois, stations... Ensuite, à partir de mesures et d'expérimentations en vraie grandeur, il établit les bases conceptuelles de sa sylviculture et propose quelques scénarios techniques adaptés à différentes stations. Ainsi, face à l'actuel engouement pour cette essence, bien mis en évidence par l'inventaire forestier régional, nous espérons que cet ouvrage puisse apporter des réponses concrètes aux questions que se posent les nombreux sylviculteurs progressistes qui se sont lancés dans la production d'aulne glutineux. [less ▲]

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See detailFibrillar type I collagens enhance platelet-dependent thrombin generation via glycoprotein VI with direct support of alpha2beta1 but not alphaIIbbeta3 integrin.
Lecut, Christelle ULg; Feijge, Marion A H; Cosemans, Judith M E M et al

in Thrombosis and Haemostasis (2005), 94(1), 107-14

The role of collagens and collagen receptors was investigated in stimulating platelet-dependent thrombin generation. Fibrillar type-I collagens, including collagen from human heart, were most potent in ... [more ▼]

The role of collagens and collagen receptors was investigated in stimulating platelet-dependent thrombin generation. Fibrillar type-I collagens, including collagen from human heart, were most potent in enhancing thrombin generation, in a way dependent on exposure of phosphatidylserine (PS) at the platelet surface. Soluble, non-fibrillar type-I collagen required pre-activation of integrin alpha2beta1 with Mn2+ for enhancement of thrombin generation. With all preparations, blocking of glycoprotein VI (GPVI) with 9O12 antibody abrogated the collagen-enhanced thrombin generation, regardless of the alpha2beta 1 activation state. Blockade of alpha2beta1 alone or antagonism of autocrine thromboxane A2 and ADP were less effective. Blockade of alphaIIbbeta3 with abciximab suppressed thrombin generation in platelet-rich plasma, but this did not abolish the enhancing effect of collagens. The high activity of type-I fibrillar collagens in stimulating GPVI-dependent procoagulant activity was confirmed in whole-blood flow studies, showing that these collagens induced relatively high expression of PS. Together, these results indicate that: i) fibrillar type-I collagen greatly enhances thrombin generation, ii) GPVI-induced platelet activation is principally responsible for the procoagulant activity of fibrillar and non-fibrillar collagens, iii) alpha2beta1 and signaling via autocrine mediators facilitate and amplify this GPVI activity, and iv) alphaIIbbeta3 is not directly involved in the collagen effect. [less ▲]

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See detailLe principe de légalité en matière de roulage : un principe relatif?
Jacobs, Ann ULg

in Revue de Jurisprudence de Liège, Mons et Bruxelles (2005)

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See detailQue reste-t-il de l’autorité de la chose jugée du pénal sur le civil ?
Jacobs, Ann ULg

in Revue Critique de Jurisprudence Belge (2005)

Etat de la question de l'autorité de chose jugée du pénal sur le civil, en particulier en matière de roulage,la conclusion étant que cette autorité a tendance à disparaître

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See detailModélisation par éléments finis du couplage thermo-élastique dans les structures vibrantes
Lepage, Séverine; Golinval, Jean-Claude ULg

Conference given outside the academic context (2005)

Micro-accelerometers and micro-gyrometers are being developed in order to respond to the demand of accurate miniature inertial navigation systems. In the design of such accurate systems, which require a ... [more ▼]

Micro-accelerometers and micro-gyrometers are being developed in order to respond to the demand of accurate miniature inertial navigation systems. In the design of such accurate systems, which require a high quality factor, the dissipation mechanisms such as the thermoelastic damping have to be considered. In order to assess the thermoelastic influence on the behavior of vibrating structures, analytical models may be used for simple configurations under very restrictive assumptions. In order to investigate more complex structures, the finite element method may be used. An oscillating clamped-clamped beam is modelled using thermoelastic finite elements. The analytical and finite element analyses show that the thermoelastic coupling implies a natural frequency shift, an amplitude attenuation, a difference of phase between the thermal and mechanical degrees of freedom and influences the quality factor of the resonating system. [less ▲]

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See detailFault Detection Algorithm based on Null-Space Analysis for On-Line Structural Health Monitoring
Yan, Ai-Min; Golinval, Jean-Claude ULg; Marin, Frédéric

Conference given outside the academic context (2005)

Early diagnosis of structural damages or machinery malfunctions allows to reduce the maintenance cost of systems and to increase their reliability and safety. This paper addresses the damage detection ... [more ▼]

Early diagnosis of structural damages or machinery malfunctions allows to reduce the maintenance cost of systems and to increase their reliability and safety. This paper addresses the damage detection problem by statistical analysis on output-only measurements of structures. The developed method is based on subspace analysis of the Hankel matrices constructed by vibration measurement data. The column active subspace of the Hankel matrix defined by the first principal components is orthonormal to the column null-subspace defined by the remaining principal components. The residue in the orthonormality relation obtained from different data sets may be used to detect structural damages. It is illustrated that this null-space-based method constitutes an enhancement of the classical damage detection method based on principal component analysis (PCA). Several damage indicators are proposed to characterize the resulting residue matrices. The method is first illustrated on a numerical example and then, it is applied to vibration fatigue testing of a street-lighting device. Because of its simplicity and efficiency, the proposed algorithm is expected to be suitable for continuous on-line health monitoring of structures in practical situations. [less ▲]

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See detailLocal dependence estimation using semi-parametric Archimedean copulas
Vandenhende, François; Lambert, Philippe ULg

in Canadian Journal of Statistics = Revue Canadienne de Statistique (2005), 33

The authors de¯ne a new semiparametric Archimedean copula family having a °exible depen- dence structure. The family's generator is a local interpolation of existing generators. It has locally-de¯ned ... [more ▼]

The authors de¯ne a new semiparametric Archimedean copula family having a °exible depen- dence structure. The family's generator is a local interpolation of existing generators. It has locally-de¯ned dependence parameters. The authors present a penalized constrained least-squares method to estimate and smooth these parameters. They illustrate the °exibility of their dependence model in a bivariate survival example. [less ▲]

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See detailConstraints on concordance measures in bivariate discrete data
Denuit, Michel; Lambert, Philippe ULg

in Journal of Multivariate Analysis (2005), 93

This paper aims to investigate the constraints on dependence measures based on the concept of concordance when discrete random variables are involved. The main technical argument consists in a continuous ... [more ▼]

This paper aims to investigate the constraints on dependence measures based on the concept of concordance when discrete random variables are involved. The main technical argument consists in a continuous extension of integer-valued random variables by convolution with unit support kernels [less ▲]

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See detailApplicability of models in the field of environmental chemistry of the Med Sea
Beckers, Jean-Marie ULg

in Saliot, Alain (Ed.) The Mediterranean Sea (2005)

The present chapter highlights the problems facing when modelling the marine environment, in particular for biochemical aspects. It is shown how the marine environment differs from other fluids and how ... [more ▼]

The present chapter highlights the problems facing when modelling the marine environment, in particular for biochemical aspects. It is shown how the marine environment differs from other fluids and how this affects modelling. General modelling approaches are shown and the problem of the vaste range of scales encountered is adressed. In addition to mathematical modelling problems, practical questions of adequate boundary and initial conditions are then further analysed with respect to biochemical components carried by the flow. Finally questions of errors, validation and data assimilation encountered during the analysis of the model’s quality are adressed. [less ▲]

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See detailLe rôle des promotions foncières et immobilières dans la production des périphéries : application à la Belgique et à ses nouveaux espaces résidentiels
Halleux, Jean-Marie ULg

in Revue Géographique de l'Est (2005), (3-4), 161-174

Despite their spatial and economic importances, the sectors of property and land developments are still badly known. The aim of this article, dedicated to the spatial context of new residential ... [more ▼]

Despite their spatial and economic importances, the sectors of property and land developments are still badly known. The aim of this article, dedicated to the spatial context of new residential developments produced in Belgium, is to analyse the influence of those sectors on both, the urban land-uses and the characteristics of residential outskirts. In the first part, the analysed spatial context is presented. In the second part, dedicated to the investment choices of land developers, we try to apprehend why the Belgian peri-urbanisation engenders very important land consumptions. In the third part, the property development issue is taken into account in order to explain why the self-provided sector is so highly prevailing in Belgium. Our research leads to the conclusion that investment choices of both, land developers and property developers, are highly constrained by land market configurations. [less ▲]

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See detailSeparation and identification of endoxylanases from Bacillus subtilis and their actions on wheat bran insoluble dietary fibre
Xiaoping, Yuan; Jing, Wang; Huiyuan, Yao et al

in Process Biochemistry (2005), 40(7), 2339-2343

A novel and convenient method based on native polyacrylamide gel electrophoresis (PAGE) and homogenization extraction was used for the purification of xylanase from crude enzymes. Two xylanases were ... [more ▼]

A novel and convenient method based on native polyacrylamide gel electrophoresis (PAGE) and homogenization extraction was used for the purification of xylanase from crude enzymes. Two xylanases were purified by this method from the crude enzyme preparation from the selected strain of Bacillus subtilis. Subsequent analysis with thin layer chromatography and high pressure liquid chromatography (HPLC) indicated that these two xylanases were endo-acting enzymes, designated xyl I and xyl II. Both enzymes showed their activities in the pH range from 5.0 to 9.0 at 50 °C and had similar optimum activities at pH 7.0 and at 50 °C. Mn2+ ions enhanced their xylanolytic activities to 2.7-fold whereas Fe3+ completely inhibited them. The action of endoxylanase xyl II on wheat bran insoluble dietary fibre was also studied. The hydrolysis products were shown to contain feruloyl oligosaccharides by paper chromatography [less ▲]

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