References of "Thewis, André"
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See detailInulin incorporation in the weaning piglet diet as alternative to growth promoters.
Rossi, Florence; Cox, Eric; Godderis, B. et al

Conference (1999)

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See detailDetermination of methionine requirement of growing double-muscled Belgian Blue bull.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Book of abstract of the VIIIth International Symposium on Protein Metabolism and Nutrition. (1999)

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See detailEffet de l'addition des tannins de châtaigniers sur la rétention azotée et la digestibilité chez les ruminants ingérant des produits herbagers.
Kriaa, Samia; Thewis, André ULg

in Tropicultura (1999), 16/17(1), 26-28

The use of chestnut tannin (CT) (hydrolysable tannins), added at a low concentration (4 g CT/100 g of total nitrogen (TN) = 0,8 g cT/kg of DM distribute) to a grass forage for growing sheep, improves the ... [more ▼]

The use of chestnut tannin (CT) (hydrolysable tannins), added at a low concentration (4 g CT/100 g of total nitrogen (TN) = 0,8 g cT/kg of DM distribute) to a grass forage for growing sheep, improves the N retention (P0,01). The improvement of N retention is explained by the decrease of nitrogen in the urine, indicating a better use of absorbed nitrogen. Moreover, the addition at these low concentrations of CT to fresh grass does not alter neither the digestibility of its constituents (OM, TN, ADF) nor the rate of ingestion. [less ▲]

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See detailAlimentation du porc: digestibilité des acides aminés.
Leterme, Pascal; Thewis, André ULg

in Agricontact (1998), (304), 1-6

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See detailCouverture des besoins en proteines et acides amines des vaches laitieres hautes productrices.
Thewis, André ULg

in Elevages Belges (1998), 52(2), 34-37

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See detailEtude comparative de la technique du gaz-test, de la digestibilité de la matière organique par la cellulase et de la composition chimique d'Andropogon gayanus pour la prédiction de sa valeur énergétique et de son ingestibilité chez le mouton Peul-Peul.
Ndimubandi, Albéric; Dieng, Abdoulay; Fonck, Myriam et al

in 5èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 2-3 décembre 1998 (1998)

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See detailDétermination du besoin en méthionine du taurilon Blanc Bleu Belge culard en croissance.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in Rencontres Recherches Ruminants. (1998)

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See detailEvaluation environnementale de l'installation et de l'exploitation d'une porcherie.
Boudali, Rachid; Debouche, Charles ULg; Dehon, Jean-Pierre et al

Report (1998)

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See detailThe Current N-15-Leucine Infusion Technique Is Not Suitable For Quantitative Measurements Of Ileal Endogenous Amino Acid Flows In Pigs
Leterme, Pascal; Seve, Bernard; Thewis, André ULg

in Journal of Nutrition (1998), 128(11), 1961-1968

The current 15N-leucine infusion technique may overestimate the ileal endogenous nitrogen losses in pigs. To determine the reason, we infused four cannulated pigs intravenously, fed them a pea-based diet ... [more ▼]

The current 15N-leucine infusion technique may overestimate the ileal endogenous nitrogen losses in pigs. To determine the reason, we infused four cannulated pigs intravenously, fed them a pea-based diet with 15N-leucine, and examined some methodological variables. Neither the blood sampling time nor the choice of precursor pool (total N or amino acid N of deproteinized plasma) or the method of estimation of the isotopic equilibrium level significantly affected the results. On the other hand, the 15N-enrichment of purified mucin, isolated from ileal digesta, was higher than that of the plasma amino acid pool (0.114 vs. 0.077 atom % excess). The endogenous proportion of the labeled amino acids (Ala, Gly, Ile, Leu and Val) in the ileal digesta ranged from 23 (Leu) to 74% (Ala), compared with 70% for total N. The low value of leucine was ascribed to the constant marker infusion condition. In pigs infused with 13C-leucine, a similar endogenous proportion was obtained for lumenal leucine with 13C-leucine and 15N-leucine infusion. However, the 13C-enrichment of the leucine bound to mucin was markedly lower than that of plasma leucine (38%). The endogenous amino acid flows were also estimated by combining the ileal N flow measured with 15N and the endogenous amino acid profile obtained by means of an N-free diet. They were different from those obtained with the 15N-amino acid dilution technique. We conclude that the precursor pool currently used (plasma total N or total a-amino acid N pools) is a poor indicator of the enrichment of the secretions and that the infusion of one labeled amino acid is not sufficient to extend the method at the amino acid level. [less ▲]

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See detailThe High Water-Holding Capacity Of Pea Inner Fibers Affects The Ileal Flow Of Endogenous Amino Acids In Pigs
Leterme, Pascal; Froidmont, Eric; Rossi, Florence et al

in Journal of Agricultural and Food Chemistry (1998), 46(5), 1927-1934

Pigs were fed protein-free diets containing different pea inner fiber (PIF) isolates (from wrinkled or smooth peas, unprocessed or micronized) or different PIF levels (from 50 to 200 g/kg diet), and the ... [more ▼]

Pigs were fed protein-free diets containing different pea inner fiber (PIF) isolates (from wrinkled or smooth peas, unprocessed or micronized) or different PIF levels (from 50 to 200 g/kg diet), and the flows of endogenous N and amino acids were measured at the ileum level. The flows were better correlated to the water-holding capacity (WHC) of the diet than to fiber intake (R2 = 0.996 vs 0.76, respectively). The relationship with WHC was of the exponential type, with a high increase when the WHC exceeded 3 g of water/g diet. A similar pattern and correlation (R2 = 0.98) was obtained for the ileal flow of nucleobases (markers of epithelial cells and bacteria), whereas the relationships with crude mucus (R2 = 0.96) and diaminopimelic acid (marker of bacteria, R2 = 0.55) were linear. N retention by pigs fed with 0, 30, 60, or 90 g/kg of dry matter (DM) of the same protein isolates did not differ significantly in pigs receiving a 40 or 160 g of PIF/kg diet, despite significant differences in ileal N and amino acid flows between the two fiber levels (2.0 and 3.1 g of N/kg of DM intake, on average). These results and those of the flow of endogenous N compounds suggest an effect of the swollen fibers on the intestinal wall rather than a disturbance of the digestive processes. [less ▲]

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See detailDigestibility and fermentation of inulin in the weaned piglets digestive tract.
Rossi, Florence; Ewodo, C.; Fockedey, R. et al

in Proceedings of the International Symposium " Non-digestible oligosaccharides : healthy food for the colon?" (1997, December)

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See detailEffet des protéines et des fibres alimentaires sur les pertes iléales d'acides aminés endogènes chez le porc.
Leterme, Pascal; Rossi, Florence; Thewis, André ULg

in Journées de la Recherche Porcine en France (1997), 29

An N-free diet was supplemented with limited but increasing amounts of proteins (30, 60, 90 g/kg diet from a mixture of casein and egg yolk), in order to measure their effect on the ileal endogenous amino ... [more ▼]

An N-free diet was supplemented with limited but increasing amounts of proteins (30, 60, 90 g/kg diet from a mixture of casein and egg yolk), in order to measure their effect on the ileal endogenous amino acid (AA) losses in pigs. The study was conducted at 2 dietary fibre levels: 20 and 80 g/kg, isolated from pea seeds. Compared to the N-free diet, a supply of 30 g proteins was sufficient to obtain a positive N retention and the following supplies allowed a constant and linear increase (0.88 g N retained/g N intake). The same supply induced an increase in ileal endogenous losses, compared to the control (10.7 vs 7.2 g AA/kg DMi for the low fibre diet) but the difference was not significant because of a high variability between the pigs. The supplies of 60 and 90 g proteins did not modify the level of the losses either: 10.2 and 10.6 g AA/kg DMi, respectively. The same trends were observed for the diets with a high fibre level but, in this case, the losses were significantly higher: respectively 14.9, 16.7, 15.7 and 17 g AA/kg DMi. On the other hand, the fraction of the digesta containing the free AA and the small peptides (< 3 kDa), supposed to be mainly of dietary origin, remained independent of the protein level. This suggests a virtually complete digestibility of the dietary proteins. Thus, pea fibres induce a significant increase of the ileal endogenous losses but without disturbing the protein digestion process, as suggested by the N retention. The protein supply probably increased the digestive secretions but the latter could have been highly reabsorbed, due to a lack in dietary factors susceptible to increase the reabsorption. [less ▲]

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See detailRecherches en production laitière et valorisation du lait.
Blecker, Christophe ULg; Burny, Philippe ULg; Gengler, Nicolas ULg et al

Scientific conference (1997, January 22)

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See detailInfluence de la perfusion duodénale de caséinate de sodium sur la rétention azotée chez le taurillon Blanc Bleu Belge culard en croissance et rationné en protéines.
Froidmont, Eric; Beckers, Yves ULg; Thewis, André ULg

in 4èmes Rencontres autour de la Recherche sur les Ruminants, Paris, France, 4-5 décembre 1997 (1997)

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See detailValeur protéique des matières premières destinées à l'alimentation des porcs: nouvelles perspectives.
Leterme, Pascal; Thewis, André ULg

Article for general public (1997)

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See detailRéduction des rejets azotés chez le porc par l'alimentation.
Leterme, Pascal; Thewis, André ULg

in Efficience de l'azote en production végétale et animale, Journée d'Etude organisée par le Centre de Recherches Agronomiques et la Faculté Universitaire des Sciences Agronomiques (1997)

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See detailRecherches en production laitière et valorisation du lait
Blecker, Christophe ULg; Burny, Philippe ULg; Fabry, Jules et al

in Annales de Gembloux (1997), 102

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