References of "Hornick, Jean-Luc"
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See detailCorrelation of five radioimmunoassay systems for measurement of bovine plasma pregnancy-associated glycoprotein concentrations at early pregnancy period.
Ayad, A.; Melo de Sousa, Noelita ULg; Sulon, Joseph ULg et al

in Research in Veterinary Science (2009), 86

The measurement of serum or plasma PAG concentrations is currently used as a specific method for pregnancy diagnosis in cattle. In this study, the correlation between five radioimmunoassay systems (RIA ... [more ▼]

The measurement of serum or plasma PAG concentrations is currently used as a specific method for pregnancy diagnosis in cattle. In this study, the correlation between five radioimmunoassay systems (RIA-497, RIA-706, RIA-780, RIA-809 and RIA-Pool) developed for measurement of PAG concentrations in ruminant species was investigated in plasma from pregnant Friesian Holstein females. Plasma PAG concentrations (ng/mL) measured by different RIA systems were significantly correlated between them ( 0.81; P<0.001). PAG concentrations increased significantly from Day 21 (n=27) to 30 (n=37) after AI by use of all PAG-RIA systems. From Day 30 to 80 after AI, lower PAG concentrations were observed when using the homologous system RIA-497. The addition of several proteinase inhibitors changed neither the non specific binding nor the B(0) binding to the tracer. Our results suggest that all tested PAG-RIA (RIA-497, RIA-706, RIA-780, RIA-809 and RIA-Pool) are highly correlated and can be useful to follow PAG concentrations in samples collected during the first trimester of gestation. [less ▲]

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See detailPractical feeding of sugar gliders (Petaurus breviceps)
Guillon, Leslie; Hornick, Jean-Luc ULg; Istasse, Louis ULg et al

in Mussa, P. P.; Nery, J.; Schiavone, A. (Eds.) et al Congress Proceedings 13t h Congress of the ESVCN (2009)

Communication relatant un essai d'alimentation pratique de sugar glider en captivité

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See detailDevelopment of a practical test of insulin resistance in obese Beagle dogs and effects of sc FOS
Daumas, Caroline; Lhoest, Estelle; Hornick, Jean-Luc ULg et al

in Mussa, P. P.; Nery, J.; Schiavone, A. (Eds.) et al Congress Proceedings 13t h Congress of the ESVCN (2009)

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See detailUtilisation de la prairie permanente dans le contexte d’extensification: application en productions de viande et de lait
Cameroni, F. J. D.; Hornick, Jean-Luc ULg; Istasse, Louis ULg et al

in Annales de Médecine Vétérinaire (2008), 152(3), 138-151

Les productions animales sont soumises à des restrictions qui ont pour objectif de respecter le bien être animal et la sécurité de la chaîne alimentaire ou de contrôler les volumes de production et leurs ... [more ▼]

Les productions animales sont soumises à des restrictions qui ont pour objectif de respecter le bien être animal et la sécurité de la chaîne alimentaire ou de contrôler les volumes de production et leurs impacts environnementaux. Ces dernières restrictions imposent des mesures de réduction du chargement en animaux par hectare et du niveau de fertilisation azotée et sont réglementées dans le cadre de la Directive Nitrate (91/676/EC). L’extensification des systèmes de production répond aux mesures encouragées par les politiques agricoles qui visent à réduire l’excèdent d’azote (N) dans des systèmes de production présentant intrinsèquement de faibles efficiences d’utilisation de l’azote. Le présent travail récapitule les résultats zootechniques, phytotechniques et environnementaux des systèmes de pâturage, pendant six années, pour trois catégories d’animaux (vaches allaitantes et veaux, taureaux et vaches laitières). Des protocoles semblables ont été utilisés pour les trois catégories, à savoir, un système avec fertilisation azotée et chargement conventionnel intensif (3/3 N), un traitement avec le même chargement et une fertilisation azotée réduite d’un tiers (2/3 N) et un traitement sans application de fertilisation azotée (0 N) avec un chargement adapté. Les résultats montrent qu’une réduction d’un tiers de la fertilisation azotée peut être envisagée pour réduire les excédents d’azote des systèmes de pâturage alors que les systèmes extensifs présentent des efficiences plus hautes d’utilisation de l’azote et des bilans azotés plus favorables, sans affecter le niveau ni la qualité des produits. [less ▲]

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See detailSoil-applied selenium effects on tissue selenium concentrations in cultivated and adventitious grassland and pasture plant species
Hambuckers, Alain ULg; Dotreppe, Olivier ULg; Hornick, Jean-Luc ULg et al

in Communications in Soil Science & Plant Analysis (2008), 39(5-6), 800-811

According to international nutritional standards, plant selenium (Se) concentrations in Belgium are too low. To correct this situation, adding Se in fertilizers for pastures and grasslands is suggested ... [more ▼]

According to international nutritional standards, plant selenium (Se) concentrations in Belgium are too low. To correct this situation, adding Se in fertilizers for pastures and grasslands is suggested, similar to activities in Finland. However, there is a lack of data on meadow plant species' ability to absorb Se. Therefore, a pot experiment was initiated using 24 meadow plant species cultivated on a Belgian cambisol receiving standard fertilizer treatment, with or without the addition of 9 g Se ha(-1) yr(-1) as sodium selenate. Soil Se analysis confirmed the low Se status of the native soil. Mean foliar Se concentration in the control group was 0.05 mg kg(-1). Because plant deficiency may occur at levels less than 0.10 mg Se kg(-1), data provided further evidence for Se deficiency in Belgium plant production. When grown with Se, plant species showed wide variations for Se concentration, ranging from 0.08 to 0.49 mg Se kg(-1). All values were less than 2 mg Se kg(-1), the suggested threshold toxicity level for dairy cattle. There were two different types of plants in terms of response to Se fertilization. Most of the tested plants were known as nonaccumulators. There were also two probable secondary accumulators: Sinapis arvensis and Melilotus albus. Finally, one has to question the reliability of plant Se enhancement using this method when floristic composition is poorly controlled. [less ▲]

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See detailSeasonal variations in the crop contents of scavenging Helmeted Guinea Fowls (Numida meleagris, L.) in Parakou (Benin).
Dahouda, M.; Toléba, Seibou Soumanou; Youssao, A. K. I. et al

in British Poultry Science (2008), 49(6), 751-9

1. An experiment was carried out with 120 helmeted guinea fowls during one year in Parakou (Benin). Feed intake, ingredient and chemical composition, along with the nutritional adequacy of scavenging ... [more ▼]

1. An experiment was carried out with 120 helmeted guinea fowls during one year in Parakou (Benin). Feed intake, ingredient and chemical composition, along with the nutritional adequacy of scavenging diets were measured during the rainy season (November-February) and dry season (March-October) in order to propose supplementation strategies. Ingredients found in crops were identified and allocated into 6 main categories (supplemental feed, seeds, green forages, animal materials, mineral matter and unidentified materials). 2. Mean dry weights of crop contents were significantly higher in the rainy than in the dry season. Amounts and proportions of supplemental feed and seeds were not significantly different between seasons, whereas those of green forage, animal materials and mineral matter were higher in rainy season. Supplemental feed, especially maize and sorghum, was the largest component of the crop content in both seasons. The most represented grass seeds were Panicum maximum (rainy season) and Rottboellia cochinchinensis (dry season). 3. Dietary concentrations of organic matter, non-nitrogen extract and metabolisable energy were higher in the dry season, while mineral concentrations were higher in the rainy season. There were no significant differences between the two seasons in dry matter, crude protein or crude fibre. 4. Scavenging provided insufficient nutrients and energy to allow guinea fowls to be productive. Therefore, more nutritionally balanced supplementary feed would be required during both seasons. [less ▲]

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See detailMilk urea content: effects of environmental parameters and relationships with other milk traits
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Istasse, Louis ULg et al

in Biodiversity and animal feed. Future challenges for grassland production. Proceedings of the 22nd General Meeting of the European Grassland Federation (2008)

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See detailSpelt, an ancient cereal and first pressure linseed oil as ingredients of compound feedstuffs for modern horse feeding.
Fayt, Joseph; Dotreppe, Olivier ULg; Hornick, Jean-Luc ULg et al

in Journal of Animal Physiology & Animal Nutrition (2008), 92(3), 303-9

Spelt is a covered cereal with large glumellas. In experiment 1, it has been compared in terms of chemical composition with barley, oat and maize. Spelt is characterized by rather low protein and ether ... [more ▼]

Spelt is a covered cereal with large glumellas. In experiment 1, it has been compared in terms of chemical composition with barley, oat and maize. Spelt is characterized by rather low protein and ether extract (EE) contents. The neutral detergent fibre (NDF) content of spelt was slightly higher than that of oat but the acid detergent fibre (ADF) content was lower. Two compound feedstuffs were fed along with hay to six horses used in a cross-over design. Both diets were well appreciated by the horses and there were no significant differences in the apparent digestibility coefficients, except for EE which was significantly higher, when oat was included in the compound feedstuff. In experiment 2, first pressure linseed oil was incorporated at a rate of 8% in a control compound feedstuff, where the barley was partly substituted by the oil. The fat content was 9.6% dry matter (DM) in the linseed oil compound feedstuff and 5.4% in the hay-concentrate ration. The inclusion of linseed oil increased the digestibility of DM, EE and NDF of the diet. There were no effects on the post-prandial concentrations of glucose, triglycerides and non-esterified fatty acids (NEFA) but the insulin concentration was significantly reduced with the linseed oil inclusion. There were significant increases in the plasma concentrations of the total fatty acids, polyunsaturated fatty acids (PUFA), saturated fatty acids (SFA), C18:3 n-3 and C18:2 n-6 and significant reductions in the contents of monounsaturated fatty acids (MUFA), C18:1 n-7 + n-9 and C20:4 n-6. It is concluded that the inclusions of spelt and first pressure linseed oil in compound feed stuff for horse are of interest for modern horse feeding. [less ▲]

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See detailLinseed oil supplementation in diet for horses: Effects on palatability and digestibility
Delobel, Agathe; Fabry, Christophe ULg; Schoonheere, Nicolas ULg et al

in Livestock Science (2008), 116

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See detailComparaison des caractéristiques de production de la pintade locale (Meleagris numida) en station et dans le milieu villageois en zone soudano-guinéenne du Bénin
Dahouda, Mahamadou; Sènou, Marcel; Toléba, Seibou Soumanou et al

in Livestock Research for Rural Development (2008), 20(12),

A survey on the production characteristics of guinea fowl (Meleagris numida) was carried out in the Borgou department located in the soudano-guinean zone North-Est of Benin. Chicks and reproductive groups ... [more ▼]

A survey on the production characteristics of guinea fowl (Meleagris numida) was carried out in the Borgou department located in the soudano-guinean zone North-Est of Benin. Chicks and reproductive groups were kept either on station under improved management conditions or in rural environment. In rural environment, the birds were divided in two groups. The birds pertaining to the first group were treated against parasitic diseases, whereas those in the second one (control group) received no treatment. Under station conditions, the feed conversion ratio and the daily weight gain were 8.8 and 5.7 g/day respectively. Mean body weight at six months of age were 1151g and 1085g for males and females, respectively. Sexual maturity was reached at 36 weeks of age. For mature hens kept on station, laying rate and the mean egg weight were 37.2% (65% at the peak) and 41.1g respectively. Smothering, stress and pricking were the major constraints to the cloistering of guinea fowl. In rural environment, the mean hatchability rate was 70%. Mortality rate and adult body weight were not significantly different between groups. Mortality rate observed in the rural environment was 50% for both treated or untreated birds. Apart from the parasitic affections, the main causes of mortality were the rain, the predators, the cold and the fragility of chicks. The mean body weight at six months of age is higher for the birds raised under village conditions in comparison to the birds kept on station. [less ▲]

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See detailOrganic selenium providing by selenized fertilisation in grazed grass, grass and maize silage for beef and dairy cows.
Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg; Dotreppe, Olivier ULg et al

in Biodiversity and animal feed. Future challenges for grassland production. Proceedings of the 22nd General Meeting of the European Grassland Federation (2008)

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See detailMilk urea content: effects of environmental parameters and relationships with other milk traits
Dufrasne, Isabelle ULg; Cabaraux, Jean-François ULg; Istasse, Louis ULg et al

in Biodiversity and animal feed. Future challenges for grassland production. Book of abstracts. 22nd General Meeting of the European Grassland Federation (2008)

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See detailOrganic selenium providing by selenized fertilisation in grazed grass, grass and maize silage for beef and dairy cows
Cabaraux, Jean-François ULg; Hornick, Jean-Luc ULg; Dotreppe, Olivier ULg et al

in Biodiversity and animal feed. Future challenges for grassland production. Book of abstracts. 22nd General Meeting of the European Grassland Federation (2008)

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See detailEssential fatty acids content in beef meat as influenced by crushed, flaked or extruded linseeds
Robaye, Vincent ULg; Dotreppe, Olivier ULg; Cabaraux, Jean-François ULg et al

in book of abstract of the 59th Annual meeting of the European Association for Animal Production (2008)

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See detailCarcasses of Belgian Blue double muscle culled cows or growing fattening bulls: essential fatty acids content in 17 meat pieces
Robaye, Vincent ULg; Dotreppe, Olivier ULg; Cabaraux, Jean-François ULg et al

in book of abstract of the 59th Annual meeting of the European Association for Animal Production (2008)

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See detailRadioimmunoassay of bovine placental lactogen using recombinant and native preparations: determination of fetal concentrations across gestation
Alvarez-Oxiley, A. V.; Melo de Sousa, Noelita ULg; Hornick, Jean-Luc ULg et al

in Reproduction, Fertility and Development (2007), 19(7), 877-885

Concentrations of bovine placental lactogen ( bPL) were determined in fetal plasma samples by twelve double-antibody competitive radioimmunoassay systems ( RIA I - XII) based on either recombinant bPL ... [more ▼]

Concentrations of bovine placental lactogen ( bPL) were determined in fetal plasma samples by twelve double-antibody competitive radioimmunoassay systems ( RIA I - XII) based on either recombinant bPL ( non- glycosylated) or native bPL ( glycosylated). Both preparations were used as standard and tracer, and for primary antisera production. The minimum detection limit measured by these RIA varied from 0.02 to 0.6 ng bPLmL(-1). The coefficients of correlation of different bPL RIA systems were up to 90% ( P< 0.0001) when each RIA was tested against the average values of all twelve RIA systems. All developed RIA were used to investigate the incidence of different bPL isoforms in bovine fetal serum samples ( n= 71). Fetal concentrations ranged from 11.8 to 35.7 ng mL(-1) at the third month and from 1.1 to 13.5 ngmL(-1) at the ninth month of gestation. They tended to decrease with advancing gestation. In general, those RIA systems that used recombinant bPL as the standard measured higher values than those using the native bPL preparation. These differences decreased toward the end of gestation ( P< 0.05), suggesting a lower rate of glycosylation. Our results provide evidence of different glycosylated isoforms of bPL in fetal serum at different gestation periods. [less ▲]

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