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Showing 1 to 9 of 9 for “"Internal marker"”.
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Nutritional status of beef cows grazing reclaimed strip mined pastures
… samples were taken in each trial. An external marker, Ytterbium, and an internal marker, indigestible neutral detergent fiber (INDF) were used to estimate organic matter intake, fecal output and digestibility. In addition to samples taken during the trials, blood samples and hand plucked forage …
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Seasonal differences in apparent digestibility and intake of tall fescue by horses
… were estimated using indigestible NDF as an internal marker. Forage DM intake was calculated using the formula (fecal output/(100- % forage DM digestibility) x 100). Estimated DM intake and fecal DM were 4.5 and 1.7 kg/d for August; 7.5 and 2.7 kg/d for January; and 6.4 and 2.8 kg/d for June, …
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Alkanes as Internal Markers to Estimate Digestibility in Horses
Fecal recoveries of n-alkanes were determined in three digestion balance experiments consisting of two periods each. Each experiment compared two diets in a switch-back design using eight mature Thoroughbred geldings. Horses were randomly assigned to two groups of four and offered one of two mixed …
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Pasture Intake, Digestibility and Fecal Kinetics in Grazing Horses
… success in grazing ruminants has been the use of markers, or tracers, to estimate fecal output and nutrient digestibility. External markers are dosed to the animal and can be used to determine fecal output. Internal markers are an inherent part of the diet in question and can be used to determine …
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Pharmacokinetics of neostigmine and pyridostigmine in man.
… synthesized pyridostigmine analogue as a common internal marker. The plasma concentration of pyridostigmine was measured after three different doses of the quaternary amine (36.2 Ng/kg, 72.4 pg/kg and 144.8 )tg/kg) were given intravenously to twenty five surgical patients during anaesthesia. The …
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Modelling geometric uncertainties in prostate radiotherapy
… the patient position.Measurements are made of internal and external errors for 44 patients, comparingtechniques for rectal and bladder preparation. Internal marker seeds are used todetermine prostate position from portal images. Seed based portal imaging is found tobe an effective method for …
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Effects of Phosphorus Supplementation on Grazing Beef Cattle
… capsule at 0630 and 1830 to serve as an external marker for determination of fecal dry matter excretion (DME). Indigestible NDF (iNDF) was used as an internal marker to determine dry matter intake (DMI). Due to the high forage P content, average P intake was in excess of National Research Council …
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Reduction of minerals in feedlot diets of Nellore cattle: impacts on intake, performance, and nutrient requirements; and prediction of chemical rib section composition by dual energy x-ray absorptiometry in Zebu cattle
… every day. Indigestible NDF was used as an internal marker for fecal excretion measurements. The animals were slaughtered (84 and 147 days on feed; DOF), carcass characteristics were measured and liver and rib samples were collected. Feed, feces, rib bones and liver samples were analyzed for …
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Evaluation of Internal Markers for Predicting Digestibility and Fecal Output by Cattle Fed Bermudagrass Hays of Varying Quality
… and ADIA concentrations. Fecal recoveries of internal markers were expressed as the ratio of the quantity of marker excreted per unit of marker consumed. Estimate of FO and DMD were calculated by the marker ratio technique.</p> <p>All in situ markers and ADL recoveries differed from 1. …