Determination of non‐radioactive liquid phase markers, Co‐EDTA and Cr‐EDTA, by neutron activation analysis

Kennelly, J. J.; Turner, B. V.; Apps, Michael J.

doi:10.1002/jsfa.2740331210

Cited by 7 publications

(2 citation statements)

References 21 publications

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“…Cobalt recovery has been reported as lower than chromium and the Co-EDTA complex is considered less stable in the gastrointestinal tract [Kennelly et al, 1982]. Uden et al [1980] suggested that cobalt recovery might be considerably lower in animals with a large, well-developed cecum designed for absorption of feed components.…”

Section: Discussionmentioning

confidence: 99%

Intake, digestibility, and passage of a commercially designed diet by two propithecus species

et al. 1999

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The digestibility and passage of an experimental diet was used to compare the digestive physiology of two Propithecus species: P. verreauxi and P. tattersalli. Though both animals have a similar feeding ecology, the captive status of P. verreauxi is considered more stable than that of P. tat-tersalli. The test diet included a local tree species, Rhus copallina, at 15% of dry matter intake (DMI) and Mazuri Leafeater Primate Diet at 85% of DMI. The chemical composition of the diet (dry matter basis) was 25% crude protein, 34% neutral detergent fiber (NDF), and 22% acid detergent fiber (ADF) with a gross energy of 4.52 kcal/g. After a 6 week acclimation to the experimental diet, animals were placed in research caging. After a 7 day adjustment period, animals were dosed with chromium mordant and Co-EDTA as markers for digesta passage and all feed refusals and feces were collected at timed intervals for 7 days. Digestibility values, similar for both species, were approximately 65% for dry matter, crude protein, and energy, and 40% and 35% respectively, for NDF and ADF. Transit times (1718.5 hr) and mean retention times (3134 hr) were not significantly different between species, and there was no difference between the chromium mordant and Co-EDTA. Serum values for glucose , urea, and non-esterified fatty acids (NEFA) were obtained during four different time periods to monitor nutritional status. While there was no change in serum glucose, serum urea increased over time. The NEFAs increased across all four time periods for P. verreauxi and increased for the first three periods then decreased in the last period for P. tattersalli. Results obtained indicate no difference in digestibility nor digesta passage between species, and that both Propithecus species were similar to other post-gastric folivores. Am.

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Section: Discussionmentioning

confidence: 99%

Intake, digestibility, and passage of a commercially designed diet by two propithecus species

et al. 1999

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“…The concentrations of Cr and Co in feces and urine were determined via neutron activation analysis at the Nuclear Services Facility at North Carolina State University [Kennelly et al, 1982]. The samples were irradiated for 12 hr, and radioactivity was quantified on a germanium detector (ORTEC, Oak Ridge, TN) after 1 month of radioactive decay to eliminate background radiation.…”

Section: Cr and Co Determination And Transit Analysismentioning

confidence: 99%

Use of total dietary fiber across four lemur species (Propithecus verreauxi coquereli, Hapalemur griseus griseus, Varecia variegata, and Eulemur fulvus): Does fiber type affect digestive efficiency?

Campbell

Williams

Eisemann

2004

American J Primatol

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In vivo digestibility and transit of two experimental diets were compared across four lemur species for which gastrointestinal morphology and preliminary data on physiology differ:Varecia variegata (VV), Eulemur fulvus (EF), Propithecus verreauxi (PV), and Hapalemur griseus (HG). Since free-ranging groups consume varied amounts of slowly fermentable insoluble fiber (IF) and rapidly fermentable soluble fiber (SF), differences in digestibility may be related to variation in the fiber types consumed. To investigate this, two diets were designed to provide 28% of dry matter (DM) as total dietary fiber (TDF). The ratio of IF/SF (g/g) differed across the diets (12.15:1 for the IF diet, and 3.76:1 for the IF/SF diet). The DM digestibility (DMD) of both diets differed across species: DMD was lower for EF and VV (approximately 56-58%), and higher for PV (72%) and HG (76%). The fiber digestibility results were as follows: TDF digestibility was similar for VV and EF (23% and 28%), higher for PV (56%), and highest for HG (66%). IF digestibility was lower for VV and EF (20% and 28%), and higher for PV and HG (53% and 62%). The transit times (TTs) of the two markers Cr and Co were similar (approximately 3.5 hr for VV and EF, 25 hr for PV, and 30 hr for HG). The mean retention times (MRTs) showed the same trend. The results from these captive groups suggest there are large differences in digestive efficiency that are likely related to the varied fiber composition of the free-ranging diet, and the amount of time the digesta are retained in the gut.

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Intake, digestibility, and passage of a commercially designed diet by two propithecus species

et al. 1999

View full text Add to dashboard Cite

The digestibility and passage of an experimental diet was used to compare the digestive physiology of two Propithecus species: P. verreauxi and P. tattersalli. Though both animals have a similar feeding ecology, the captive status of P. verreauxi is considered more stable than that of P. tattersalli. The test diet included a local tree species, Rhus copallina, at 15% of dry matter intake (DMI) and Mazuri Leafeater Primate Diet at 85% of DMI. The chemical composition of the diet (dry matter basis) was 25% crude protein, 34% neutral detergent fiber (NDF), and 22% acid detergent fiber (ADF) with a gross energy of 4.52 kcal/g. After a 6 week acclimation to the experimental diet, animals were placed in research caging. After a 7 day adjustment period, animals were dosed with chromium mordant and Co-EDTA as markers for digesta passage and all feed refusals and feces were collected at timed intervals for 7 days. Digestibility values, similar for both species, were approximately 65% for dry matter, crude protein, and energy, and 40% and 35% respectively, for NDF and ADF. Transit times (1718.5 hr) and mean retention times (3134 hr) were not significantly different between species, and there was no difference between the chromium mordant and Co-EDTA. Serum values for glucose, urea, and non-esterified fatty acids (NEFA) were obtained during four different time periods to monitor nutritional status. While there was no change in serum glucose, serum urea increased over time. The NEFAs increased across all four time periods for P. verreauxi and increased for the first three periods then decreased in the last period for P. tattersalli. Results obtained indicate no difference in digestibility nor digesta passage between species, and that both Propithecus species were similar to other post-gastric folivores. Am.

show abstract

Determination of non‐radioactive liquid phase markers, Co‐EDTA and Cr‐EDTA, by neutron activation analysis

Cited by 7 publications

References 21 publications

Intake, digestibility, and passage of a commercially designed diet by two propithecus species

Intake, digestibility, and passage of a commercially designed diet by two propithecus species

Use of total dietary fiber across four lemur species (Propithecus verreauxi coquereli, Hapalemur griseus griseus, Varecia variegata, and Eulemur fulvus): Does fiber type affect digestive efficiency?

Intake, digestibility, and passage of a commercially designed diet by two propithecus species

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