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See detailApplication of Laser Induced Breakdown Spectroscopy (LIBS) to the determination of transition probabilities of laser lines in Au II spectrum
Ortiz, M.; Mayo, R.; Biémont, Emile ULg et al

Conference (2007)

Experimental branching fractions for laser lines arising from excited states of 5d97s configuration of Au II have been determined by application of Laser Induced Breakdown Spectroscopy (LIBS). The ... [more ▼]

Experimental branching fractions for laser lines arising from excited states of 5d97s configuration of Au II have been determined by application of Laser Induced Breakdown Spectroscopy (LIBS). The experimental relative transition probabilities were converted into an absolute scale using theoretical values for the radiative lifetimes of the corresponding states, calculated in this work. Transition probabilities and radiative lifetimes have been determined by a relativistic Hartree - Fock method taking configuration interaction and core-polarization effects into account. A comparison of the present results with the available theoretical values has been made and shows a reasonable agreement although discrepancies are observed between theory and experiment for some transitions. [less ▲]

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See detailActualités du droit international familial
Collienne, Fleur ULg; Wautelet, Patrick ULg; Pfeiff, Silvia ULg

in Pire, Didier (Ed.) Droit des Familles (2007)

In this paper, we review current problems and trends in relation to various matters of cross-border family law practice. We review in particular issues related to the recognition in Belgium of marriages ... [more ▼]

In this paper, we review current problems and trends in relation to various matters of cross-border family law practice. We review in particular issues related to the recognition in Belgium of marriages celebrated abroad, the recognition in Belgium of polygamic unions, cross-border same sex marriages, cross-border divorces and the impact of the Brussels IIbis Regulation, and recent case law dealing with cross-border parent-children relationships. [less ▲]

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See detailClinical Protection against Caprine Herpesvirus 1 Genital Infection by Intranasal Administration of a Live Attenuated Glycoprotein E Negative Bovine Herpesvirus 1 Vaccine
Thiry, Julien ULg; Tempesta, M.; Camero, M. et al

in BMC Veterinary Research (2007), 3

BACKGROUND: Caprine herpesvirus 1 (CpHV-1) is responsible of systemic diseases in kids and genital diseases leading to abortions in goats. CpHV-1 is widespread and especially in Mediterranean countries as ... [more ▼]

BACKGROUND: Caprine herpesvirus 1 (CpHV-1) is responsible of systemic diseases in kids and genital diseases leading to abortions in goats. CpHV-1 is widespread and especially in Mediterranean countries as Greece, Italy and Spain. CpHV-1 is antigenically and genetically closely related to bovine herpesvirus 1 (BoHV-1). Taking into account the biological properties shared by these two viruses, we decided in the current study to assess the protection of a live attenuated glycoprotein E (gE) negative BoHV-1 vaccine against a genital CpHV-1 infection in goats. RESULTS: The vaccine was inoculated intranasally twice three weeks apart followed by a subsequent CpHV-1 intravaginal challenge which is the natural route of infection in three goats. To analyse the safety and the efficacy of this marker vaccine, two groups of three goats served as controls: one immunised with a virulent CpHV-1 and one uninoculated until the challenge. Goats were clinically monitored and all sampling procedures were carried out in a blind manner. The vaccine did not induce any undesirable local or systemic reaction and goats did not excrete gE-negative BoHV-1. After challenge, a significant reduction in disease severity was observed in immunised goats. Moreover, goats immunised with either gE-negative BoHV-1 or CpHV-1 exhibited a significant reduction in the length and the peak of viral excretion. Antibodies neutralising both BoHV-1 and CpHV-1 were raised in immunised goats. CONCLUSION: Intranasal application of a live attenuated gE-negative BoHV-1 vaccine is able to afford a clinical protection and a reduction of virus excretion in goats challenged by a CpHV-1 genital infection. [less ▲]

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See detailDiagnostic accuracy of blood lactate-to-pyruvate molar ratio in the differential diagnosis of congenital lactic acidosis.
DEBRAY, François-Guillaume ULg; Mitchell, Grant A; Allard, Pierre et al

in Clinical Chemistry (2007), 53(5), 916-21

BACKGROUND: Although the blood lactate-to-pyruvate (L:P) molar ratio is used to distinguish between pyruvate dehydrogenase deficiency (PDH-D) and other causes of congenital lactic acidosis (CLA), its ... [more ▼]

BACKGROUND: Although the blood lactate-to-pyruvate (L:P) molar ratio is used to distinguish between pyruvate dehydrogenase deficiency (PDH-D) and other causes of congenital lactic acidosis (CLA), its diagnostic accuracy for differentiating between these 2 types of CLA has not been evaluated formally. METHODS: We conducted a retrospective study of all patients followed for mitochondrial diseases between 1985 and 2005 in a tertiary care pediatric hospital. RESULTS: At the recommended cut point of approximately 25, individual median L:P ratio demonstrated low sensitivity and specificity (77% and 91%, respectively) for differentiating between patients with enzymatically proven PDH-D (n = 11) and those with mitochondrial disease but normal pyruvate dehydrogenase (PDH) activity (non-PDH; n = 35). We observed a strong positive association between L:P ratio and blood lactate in non-PDH CLA, whereas this association was weak in PDH-D CLA. Consequently, patient classification based on median L:P ratio showed improved diagnostic accuracy at higher lactate concentrations: for lactate <2.5 mmol/L the area under the ROC curve was not statistically different from 0.5 (P = 0.3), whereas it was statistically different for lactate >2.5 mmol/L. In the 2.5 to 5.0 mmol/L lactate category, the sensitivity and specificity at an optimal cut point of 18.4 were 93% (95% CI, 77%-99%) and 71% (95% CI, 20%-96%), respectively; for lactate >5.0 mmol/L, with an optimal cut point of 25.8, sensitivity and specificity were 96% (95% CI, 77%-99%) and 100% (95% CI, 59%-100%), respectively. CONCLUSION: Usefulness of the L:P ratio for differentiating non-PDH and PDH-D types of CLA increases at higher lactate concentrations. [less ▲]

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See detailAdaptive Patch Features for Object Class Recognition with Learned Hierarchical Models
Scalzo, Fabien; Piater, Justus ULg

in 2nd Beyond Patches Workshop (2007)

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See detailToxicity Of Some Terpenoids Of Essential Oils Of Xylopia Aethiopica From Cameroon Against Sitophilus Zeamais Motschulsky
Kouninki, Habiba; Hance, Thierry; Noudjou, Félicité A. et al

in Journal of Applied Entomology (2007), 131(4), 269-274

The acute toxicity of essential oils from the whole fruit (EF) or from the fibres of the fruit (FF) of the local aromatic plants Xylopiα αethiopicα Dunal (Annonaceae) collected in north Cameroon was ... [more ▼]

The acute toxicity of essential oils from the whole fruit (EF) or from the fibres of the fruit (FF) of the local aromatic plants Xylopiα αethiopicα Dunal (Annonaceae) collected in north Cameroon was evaluated on Sitophilus zeαmαis adults. A concentration of 1 ml of essential oil per 100 g of maize seeds was tested to determine weevil mortality after 24 h of exposure. Under these conditions, the essential oil derived from both EF and FF of X. αethiopicα led to 100% mortality. In a second step, proportions of active compounds present in the oil of both EF and FF of X. αethiopicα were quantified. The toxicity of the four main compounds was tested against S. zeαmαis: α-pinene, β-pinene, -3-carene and terpinen-4-ol according to their proportion in the essential oil of the concerned plant part. β-pinene and terpinen-4-ol were responsible for 50% of the mortality at the proportion found in EF and FF essential oils respectively. When mixed, a synergic effect of the compounds was observed that restored the mortality percentage observed for the crude oil. It appears that X. αethiopicα essential oil could be a potential source of natural and low-cost insecticide to control storage pests. [less ▲]

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See detailRecensement exhaustif des activités hydro-agricoles du Bassin du Kou
Wellens, Joost ULg; Sawadogo, Idrissa; Diallo, Mamadou et al

Report (2007)

En Mai 2007, un recensement hydro-agricole du bassin du Kou a été organisé par le projet et l’AEDE, et effectué par les agents de la Direction Provinciale de l’Agriculture, de l’Hydraulique et des ... [more ▼]

En Mai 2007, un recensement hydro-agricole du bassin du Kou a été organisé par le projet et l’AEDE, et effectué par les agents de la Direction Provinciale de l’Agriculture, de l’Hydraulique et des Ressources Halieutiques. Les compétences en appui-conseil sur le terrain de la DPAHRH-Houet ainsi que la confiance dont profitent ses encadreurs dans le milieu agricole étaient indispensables pour le bon déroulement des enquêtes. L’AEDE et le projet ont assumé les besoins en formation et en matériel au niveau de la DPAHRH. Le traitement des enquêtes a été fait par le projet, les résultats et la base de données résultante ont été restitués au niveau de l’administration. Pour les différentes zones agricoles du bassin du Kou, les données suivantes ont été recensées par exploitant : données d’identification & coordonnées (GPS) ; données de cultures : superficie, calendrier, ... ; points d’exhaure : prise en rivière, puisard, ... ; caractéristiques du moyen d’exhaure ; calendrier d’irrigation ; caractéristiques du puisard & coordonnées GPS. Plus de 1.200 exploitants et groupements ont été identifiés dans les 11 différentes zones agricoles. Une base de données a été élaborée à partir de ces enquêtes. Les cartes suivantes ont été établies : occupations agricoles du bassin du Kou ; utilisation des eaux de surface vs. eaux souterraines ; moyens d’exhaure ; efficiences en irrigation ; positionnement par rapport aux berges. Les superficies potentielles irrigables sont déjà atteintes dans certaines régions, mais l’expansion est loin d’être freinée. Le grand enjeu pour le développement de l’irrigation se situe dans la gestion de la ressource en eau. La sensibilisation des agriculteurs sur les bonnes pratiques de l’irrigation permettrait de limiter les pertes lors de l’application de l’eau sur les parcelles et de réduire les inégalités d’accès à la ressource qui existent entre les utilisateurs situés en amont et en aval du cours d’eau. [less ▲]

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See detailNeonatal screening for sickle cell disease in Central Africa: a study of 1825 newborns with a new enzyme-linked immunosorbent assay test
Mutesa, Léon; Boemer, François ULg; Ngendahayo, Louis et al

in Journal of Medical Screening (2007), 14(3), 113-116

Objectives To evaluate the feasibility of systematic neonatal screening for sickle cell disease in the region of Great Lakes in Central Africa using a new approach with limited costs. Methods Between July ... [more ▼]

Objectives To evaluate the feasibility of systematic neonatal screening for sickle cell disease in the region of Great Lakes in Central Africa using a new approach with limited costs. Methods Between July 2004 and July 2006, 1825 newborn dried blood samples were collected onto filter papers in four maternity units from Burundi, Rwanda and the East of the Democratic Republic of Congo. We tested for the presence of haemoglobin C and S in the eluted blood by an enzyme-linked immunosorbent assay (ELISA) test using a monoclonal antibody. All ELISA-positive samples (multiple of the median (MoM) >= 1.5) were confirmed by a simple molecular test. The statistica software version 7.1 was used to create graphics and to fix the MoM cut-off, and the chi(2) of Pearson was used to compare the genotype incidences between countries. Results Of the 1825 samples screened, 97 (5.32%) were positive. Of these, 60 (3.28%) samples were heterozygous for Hb S, and four (0.22%) for Hb C; two (0.11%) newborns were Hb SS homozygotes. Conclusions The lower cost and the high specificity of ELISA test are appropriate for developing countries, and such systematic screening for sickle cell anaemia is therefore feasible. [less ▲]

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See detailL’entrepreneuriat féminin: Des trajectoires de mobilité
Constantinidis, Christina ULg

in Gavray, Claire (Ed.) Femmes et Mobilités (2007)

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See detailÊtre et jugement : étude sur la théorie des catégories dans la philosophie de Rickert
Dewalque, Arnaud ULg

Doctoral thesis (2007)

L'objectif de ce travail est de se réapproprier la contribution de Heinrich Rickert au programme critique de fondation de l'ontologie. Il est apparu que cette contribution résidait dans l'analyse des ... [more ▼]

L'objectif de ce travail est de se réapproprier la contribution de Heinrich Rickert au programme critique de fondation de l'ontologie. Il est apparu que cette contribution résidait dans l'analyse des structures formelles du jugement et, plus exactement, dans l'analyse du jugement existentiel. À la suite de Rickert, il a fallu déployer cette analyse sur deux versants: le versant noétique ou la théorie des actes judicatifs (Der Gegenstand der Erkenntnis, 1892-1928) et le versant noématique ou la théorie des propositions - ou "teneurs" - judicatives (Die Logik des Prädikats und das Problem der Ontologie, 1930). J'ai montré que cette double analyse permet non seulement de dégager deux concepts formels de l'être (l'être comme "Jaform" et comme "Urprädikat"), mais aussi de jeter les bases d'une théorie des catégories embrassant à la fois les étants sensibles et les étants non sensibles. [less ▲]

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See detailNoninfectious dermatoses of pregnancy
QUATRESOOZ, Pascale ULg; PIERARD-FRANCHIMONT, Claudine ULg; PIERARD, Gérald ULg

in Therapeutique dermatologique (2007)

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See detailIns(1,3,4,5)P4 negatively regulates PtdIns(3,4,5)P3 signaling in neutrophils
Jia, Y.; Subramanian, K. K.; Erneux, C. et al

in Immunity (2007), 27

Many neutrophil functions are regulated by phosphatidylinositol-3,4,5-trisphosphate (PtdIns(3,4,5)P3) that mediates protein membrane translocation via binding to pleckstrin homolog (PH) domains within ... [more ▼]

Many neutrophil functions are regulated by phosphatidylinositol-3,4,5-trisphosphate (PtdIns(3,4,5)P3) that mediates protein membrane translocation via binding to pleckstrin homolog (PH) domains within target proteins. Here we show that inositol 1,3,4,5-tetrakisphosphate(Ins(1,3,4,5)P4), a cytosolic small molecule, bound the same PH domain of target proteins and competed for binding to PtdIns(3,4,5)P3. In neutrophils, chemoattractant stimulation triggered rapid elevation in Ins(1,3,4,5)P4 concentration. Depletion of Ins(1,3,4,5)P4 by deleting the gene encoding InsP3KB, which converts Ins(1,4,5)P3 to Ins(1,3,4,5)P4, enhanced membrane translocation of the PtdIns(3,4,5)P3-specific PH domain. This led to enhanced sensitivity to chemoattractant stimulation, elevated superoxide production, and enhanced neutrophil recruitment to inflamed peritoneal cavity. On the contrary, augmentation of intracellular Ins(1,3,4,5)P4 concentrationblockedPHdomainmediated membrane translocation of target proteins and dramatically decreased the sensitivity of neutrophils to chemoattractant stimulation. These findings establish a role for Ins(1,3,4,5)P4 in cellular signal transduction pathways and provide another mechanism for modulating PtdIns(3,4,5)P3 signaling in neutrophils. [less ▲]

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See detailCaractérisation et quantification de la charge de fond transportée par un ruisseau ardennais
Houbrechts, Geoffrey ULg; Petit, François ULg

Poster (2007)

Durant la saison hydrologique 2006-2007, le transport solide par charriage a été étudié dans un affluent de la Lienne (la Chavanne). Ce ruisseau ardennais, a été équipé d’un limnigraphe et d’un piège à ... [more ▼]

Durant la saison hydrologique 2006-2007, le transport solide par charriage a été étudié dans un affluent de la Lienne (la Chavanne). Ce ruisseau ardennais, a été équipé d’un limnigraphe et d’un piège à sédiments. Ce piège consiste en deux fosses rectangulaires, perpendiculaires au sens d’écoulement, d’une capacité de piégeage de 2 m³. Les paramètres de mobilisation (puissances spécifiques, tensions de cisaillement) ont été déterminés pour des crues de différente importance et ont été mis en relation avec la taille des éléments piégés. L’analyse des caractéristiques sédimentologiques des galets piégés a permis de mettre en évidence l’influence de l’aplatissement sur la mise en mouvement des galets de différentes lithologies et d’affiner les valeurs du critère adimensionnel de Shields en condition naturelle. Par ailleurs, les galets piégés ont été comparés avec les scories présentes dans la charge de fond. Ces éléments, produits au XIVe siècle par un haut fourneau implanté 700 m en amont du site d’étude, constituent un indicateur de la compétence effective de ce cours d’eau sur une période de plusieurs siècles. La quantité de sédiments charriés a été mesurée par curage des fosses de manière systématique après chaque crue mobilisatrice. Dans cette rivière, le débit solide par charriage est seulement de 0,4 t.km-2.an-1, malgré la fréquence élevée du débit de mobilisation. Cette valeur est relativement faible vis-à-vis de ce qui a été mis en évidence sur d’autres cours d’eau ardennais plus importants (Houbrechts et al., 2006), où des valeurs 2,5 t.km-2.an-1 peuvent être atteintes. [less ▲]

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See detailInfluence of controlled immediate loading and implant design on peri-implant bone formation.
Vandamme, Katleen; Naert, Ignace; Geris, Liesbet ULg et al

in Journal of Clinical Periodontology (2007), 34(2), 172-81

AIM: Tissue formation at the implant interface is known to be sensitive to mechanical stimuli. The aim of the study was to compare the bone formation around immediately loaded versus unloaded implants in ... [more ▼]

AIM: Tissue formation at the implant interface is known to be sensitive to mechanical stimuli. The aim of the study was to compare the bone formation around immediately loaded versus unloaded implants in two different implant macro-designs. MATERIAL AND METHODS: A repeated sampling bone chamber with a central implant was installed in the tibia of 10 rabbits. Highly controlled loading experiments were designed for a cylindrical (CL) and screw-shaped (SL) implant, while the unloaded screw-shaped (SU) implant served as a control. An F-statistic model with alpha=5% determined statistical significance. RESULTS: A significantly higher bone area fraction was observed for SL compared with SU (p<0.0001). The mineralized bone fraction was the highest for SL and significantly different from SU (p<0.0001). The chance that osteoid- and bone-to-implant contact occurred was the highest for SL and significantly different from SU (p<0.0001), but not from CL. When bone-to-implant contact was observed, a loading (SL versus SU: p=0.0049) as well as an implant geometry effect (SL versus CL: p=0.01) was found, in favour of the SL condition. CONCLUSIONS: Well-controlled immediate implant loading accelerates tissue mineralization at the interface. Adequate bone stimulation via mechanical coupling may account for the larger bone response around the screw-type implant compared with the cylindrical implant. [less ▲]

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See detailCarbon dioxide dynamics in the tropical Ebrié lagoon (Ivory Coast)
Koné, Y. J. M.; Delille, Bruno ULg; Borges, Alberto ULg

Poster (2007)

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