L'huile de soja dans les rations pour taureaux à l'engrais : effets sur les fermentations dans le rumen et la digestibilité de la ration

in Annales de Médecine Vétérinaire (1992), 136

Amino acid composition and digestibility of four protein sources for dogs.

in Journal of Nutrition (1991), 121(11 Suppl), 64-5

Etude morphométrique des chevaux Mérovingiens

in Hackens, Tony; Brulet, Raymond (Eds.) Les Fouilles du quartier Saint-Brice à Tournai (1991)

The relationship between carcass characteristics, plasma hormones and metabolites in young fattening bulls.

in Veterinary Research Communications (1990), 14(1), 19-26

Six Belgian Blue bulls (double-muscled type) and six Friesian bulls were offered a fattening diet for 34 weeks. Plasma samples were obtained once a week and also every 20 min over a 24 h period, 7 weeks ... [more ▼]

Six Belgian Blue bulls (double-muscled type) and six Friesian bulls were offered a fattening diet for 34 weeks. Plasma samples were obtained once a week and also every 20 min over a 24 h period, 7 weeks before slaughter. No differences were observed between the breeds in plasma glucose, urea and free amino nitrogen concentrations, while creatinine was significantly higher in the Belgian Blue bulls. Tri-iodothyronin, tetra-iodothyronin, insulin-like growth factor 1, insulin and testosterone concentrations were higher in the Holstein group. In contrast, the Belgian Blue bulls appeared to produce more growth hormone. The slaughter weight, carcass weight, dressing percentage and proportion of lean meat were significantly higher in the Belgian Blue group. The characteristics of muscle mass (carcass weight, dressing percentage and proportion of lean meat) were positively correlated with creatinine and with the total peak area or peak amplitude of growth hormone. The insulin concentration was positively correlated with the proportion of adipose tissue in the carcass and negatively correlated with the proportion of muscle. There were no correlations between the carcass characteristics and insulin-like growth factor 1 or testosterone. No further information was provided when the ratios of the hormones were correlated with carcass characteristics. [less ▲]

Effects of dietary carbohydrate composition on rumen fermentation, plasma hormone and metabolites in growing fattening bull

in Animal Production (1990), 50

A finishing diet containing barley and sugarbeet pulp 500:200 or 200:500 g/kg was given to 12 bulls twice daily at 08.00 and 16.00 h. The high-pulp diet increased rumen acetic and butyric acids and ... [more ▼]

A finishing diet containing barley and sugarbeet pulp 500:200 or 200:500 g/kg was given to 12 bulls twice daily at 08.00 and 16.00 h. The high-pulp diet increased rumen acetic and butyric acids and decreased propionic acid compared with the high-barley diet. The diurnal patterns over a 24-h period of rumen pH, volatile fatty acids, glucose and ammonia were characterized by 2 cycles. The high-pulp induced more even fermentations as indicated by flatter curves with less extreme values than those produced by high-barley diet. Ammonia concentration was high before feeding and decreased subsequently during 4 to 6 h after the meal. No typical patterns were observed in plasma concentrations of glucose and alpha-amino nitrogen. Plasma urea concentration increased 2 h after feeding and dropped during the following 6 to 8 h. There were no effects of dietary carbohydrate composition on growth hormone concentration but plasma insulin was significantly reduced with the high-pulp diet. Furthermore, the insulin profile showed peaks after each meal with the high-barley diet but only after the afternoon feeding with the high-pulp diet. [less ▲]

Effets physiologiques de différents types de stress chez le chien avant et après blocage de stress chez le chien avant et après blocage beta-adrénergique par le carzolol

in Annales de Médecine Vétérinaire (1989), 133

The purpose of this experiment was to study (1) some cardio-vascular and metabolic effects of two different stress and (2) the modifications of these stress responses induced by a preventive ... [more ▼]

The purpose of this experiment was to study (1) some cardio-vascular and metabolic effects of two different stress and (2) the modifications of these stress responses induced by a preventive administration of carazolol. Five healthy beagle dogs were used. Firstly, a pharmacological stress was induced by an intravenous (IV) administration of epinephrine tartrate (1 ug/kg). The (3 adrenergic blockade was realised by an administration of carazolol (10ug/kg, IV). The changes in heart rate (HR), haematocrit, glycemia and blood gases were studied (1) to assess the stress-induced adjustements, (2) to study the effect of a R-adrenergic blockade on quiet resting dogs and (3) to estimate the efficiency of this blockade on the stress responses. Secondly, the dogs performed a standardized treadmill exercise, in order to produce a physiological stress. The adjustements to exercise on the one hand and the changes in these adjustements induced by a preventive administration of carazolol (10 ug/kg, I.M.) on the other hand were measured by the recording of the HR before, during and after the exercise. Epinephrine tartrate induced significant changes of HR, haematocrit and glycemia. The Beta-blockade reduced significantly these changes (P < 0,01). The exercise-induced increase of HR was also significantly reduced by the (beta-blockade (P < 0,01). On the oher hand, this blockade has no effects on the resting measured parameters. This study suggests that Beta-blockade by the carazolol has no indesirable effects on resting dogs and that it prevents the cardio-vascular and metabolic effects of stress. [less ▲]

Effets du clenbuterol dans l'engraissement de deux jumeaux monozygotes Pie-Noir

in Annales de Médecine Vétérinaire (1989), 133

Deux taureaux Pie-Noir jumeaux monozygotes obtenus par section d'un même embryon ont été utilisés et maintenus dans les mêmes conditions expérimentales. L'un a été traité au clenbutérol, l'autre a servi ... [more ▼]

Deux taureaux Pie-Noir jumeaux monozygotes obtenus par section d'un même embryon ont été utilisés et maintenus dans les mêmes conditions expérimentales. L'un a été traité au clenbutérol, l'autre a servi de témoin. En ce qui concerne les performances zootechniques, ce sont essentiellement le rendement et la qualité de la carcasse -augmentation de la proportion de viande au détriment de la graisse- qui ont été améliorés par le traitement. Les paramètres sanguins ont peu varié. Par contre, le bilan azoté a augmenté de façon nette chez l'animal traité. Une analyse histologique de fragments musculaires a montré que la surface des fibres était plus importante chez l'animal qui avait reçu le clenbutérol. [less ▲]