Comparaison chez le mouton, de l'oxyde de chrome-papier et du radiocérium, marqueurs de la phase solide des digesta

Thill, Nicole; François, Ετιεννε; Thewis, A.; Thielemans, Marie-France; Bosch, P.; Colinet, A.; DuPont, Frances M.; Pichon, J. C.; Pichon, M.

doi:10.1051/animres:19780307

Cited by 4 publications

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“…Pour l'oxyde de chrome-papier, une forme d'administration sûre et commode a été mise au point (Thill et al, 1978). Découpé en petits morceaux, le papier est incorporé à du foin de luzerne haché et l'ensemble est condensé au moyen d'une presse à pellets de laboratoire.…”

Section: Introductionunclassified

Etude quantitative de l'absorption et de la sécrétion du phosphore total et du phosphore phospholipidique dans le tube digestif du Mouton

Thewis¹,

François²,

Thielemans³

et al. 1978

Ann. Biol. anim. Bioch. Biophys.

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Summary. Absorption and secretion of total and phospholipid phosphorus in the gastrointestinal tract of the sheep : A quantitative study.Quantitative aspects of the absorption and the secretion of total and lipid phosphorus were studied in adult wethers fed chopped meadow hay using radiocerium and chromium sesquioxide-paper as unabsorbable reference markers. Radiocerium was administered with the hay uniformly labelled in its totality, whereas identical doses of chromium sesquioxide-paper were distributed reliably and simply by incorporation into alfalfa pellets (mode of preparation to be described in another publication). The chopped labelled hay and chromium sesquioxide pellets were fed twice a day. High P secretion was found in the reticulo-rumen, ranging from 2.5 to 10 g a day and consisting mainly (90 p. 100) of mineral P. The organic P, probably of microbial origin, represented a daily secretion of 15 g of phospholipids. Considerable total and phospholipid P secretion occurred in the first part of the small intestine (ranging from 6.2 to 48.6 g of total P and 1.8 to 3.4 g of phospholipid P a day). Biliary phospholipids amounted to 30 p. 100 of total P secretion, and phosphates to the remainder. This secretion of total and lipid P was followed in all subjects by absorption of comparable intensity in the small intestine. As far as the present experimental conditions are concerned, these conclusions are not compatible with the existence of a saturable process for P absorption.Introduction.

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Section: Introductionunclassified

Etude quantitative de l'absorption et de la sécrétion du phosphore total et du phosphore phospholipidique dans le tube digestif du Mouton

Thewis¹,

François²,

Thielemans³

et al. 1978

Ann. Biol. anim. Bioch. Biophys.

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“…Η μη πλήρης ανάκτηση του Cr203 στα κόπρανα αποδόθηκε από τους Henzy και Nason (1974) στην απορρόφηση μιας μικρής ποσότητας Cr2 03 από τον πεπτικό σωλήνα των ζώων. Αντίθετα, σε νεώτερη ερεύνα οι Thill et al (1978), απέ δειξαν, ότι το CT203 δεν απορροφάται. Θα ήταν όμως αβάσιμο να αποδοθούν οι απώλειες του Cr2Ü3 στην απορρόφηση του από τον πεπτικό σωλήνα, εξαιτίας της τοξικότητας του χρωμικού ιόντος.…”

Section: μέθοδοι υπολογισμού της κατανάλωσης τροφήςunclassified

Επιδραση Διαφορων Αναλογιων Θαμνωδους-Ποωδους Βλαστησης Στην Καταναλωση Τροφης Απο Γιδια

Γιακουλακη¹

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The degradation of nucleic acids in, and the removal of breakdown products from the small intestines of steers

McAllan¹

1980

Br J Nutr

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I. Nucleic acids and breakdown products were estimated in digesta taken from different sites in the small intestines of slaughtered steers given different diets. Amounts passing different sites were compared using cellulose as a non-digestible marker. The validity of this marker was checked with chromic oxide in some experiments. In other experiments, nucleic acids or derivatives were infused into the proximal duodenum of steers receiving diets of approximately equal proportions of flaked maize and hay. The amounts disappearing during passage through the small intestine were estimated using polyethylene glycol (PEG) as a nonabsorbable marker.2. In the slaughter experiments the amounts of nucleic acids entering the small intestine varied with the type of diet. RNA and DNA disappeared on average, to extents of 89 % and 80 % respectively between the abomasum and the terminal ileum, irrespective of the diet. RNA disappearance occurred almost entirely in the proximal quarter of the small intestine, whereas that of DNA extended further along the tract. 3. Nucleic acid degradation in the upper small intestine was accompanied by the transient appearance of adenosine, guanosine and pyrimidine nucleosides. These products were in greatest concentration in digesta from the first quarter of the small intestine and had generally completely disappeared by the terminal ileum. 4.Of the different substances infused into the small intestine, free nucleic acids were removed to extents greater than 97 %, adenine, guanine and uracil had completely disappeared, thymine and xanthine to approximately 80 % and 95 % and hypoxanthine and cytosine to only 51 % and 48 % respectively. The nucleosides adenosine and cytidine were also completely removed in the small intestine but were replaced, in part, by the catabolic products inosine plus hypoxanthine or cytosine respectively. Other nucleosides were removed to approximately half the extent of the corresponding bases.5. Serum and urine allantoin and uric acid levels were related to the amounts of purines entering the small intestines in free or bound form.

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Comparaison chez le mouton, de l'oxyde de chrome-papier et du radiocérium, marqueurs de la phase solide des digesta

Cited by 4 publications

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Etude quantitative de l'absorption et de la sécrétion du phosphore total et du phosphore phospholipidique dans le tube digestif du Mouton

Etude quantitative de l'absorption et de la sécrétion du phosphore total et du phosphore phospholipidique dans le tube digestif du Mouton

Επιδραση Διαφορων Αναλογιων Θαμνωδους-Ποωδους Βλαστησης Στην Καταναλωση Τροφης Απο Γιδια

The degradation of nucleic acids in, and the removal of breakdown products from the small intestines of steers

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