| Intestinal radiocalcium absorption in the goat: measurement by a double-isotope technique. | |
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MedLine Citation:
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PMID: 6546295 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Intestinal radiocalcium absorption was measured in goats by a double-isotope technique involving injection of 45CaCl2 intravenously and 47CaCl2 into the abomasum. Cumulative absorption of radiocalcium was calculated by deconvolution analysis form curves of plasma radioactivity. Repeated measurements at 2 d intervals gave highly reproducible results (r 0.94, P less than 0.001). No systematic difference between two consecutive measurements was observed. A good agreement between absorption of radiocalcium from simultaneously administered 47CaCl2 and 45Ca-labelled hay (r 0.93, P less than 0.001) seems to justify the use of inorganic 47Ca as a tracer for Ca in ruminant diets. Two- to three-fold increases in radiocalcium absorption 48 h after oral treatment with 1,25-dihydroxycholecalciferol or leaves of Solanum malacoxylon showed the usefulness of the method in situations of rapidly changing Ca absorption. Endogenous adaptations in intestinal radiocalcium absorption from 20 to 43% were observed in lactating goats when Ca intakes decreased from 12 to 4 g/d. It is concluded that the double-isotope technique is a suitable method for studies of Ca absorption in ruminants when tracer is introduced into the abomasum. The test is completed in 3-4 h and may therefore be used in situations where the absorption of Ca undergoes rapid changes. |
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Authors:
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K Hove |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The British journal of nutrition Volume: 51 ISSN: 0007-1145 ISO Abbreviation: Br. J. Nutr. Publication Date: 1984 Jan |
Date Detail:
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Created Date: 1984-02-24 Completed Date: 1984-02-24 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0372547 Medline TA: Br J Nutr Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 145-56 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Calcitriol / pharmacology Calcium / metabolism* Calcium Radioisotopes / diagnostic use* Calcium, Dietary / administration & dosage Female Goats / metabolism* Intestinal Absorption* / drug effects Lactation Methods Plants, Edible Pregnancy Time Factors |
| Chemical | |
Reg. No./Substance:
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0/Calcium Radioisotopes; 0/Calcium, Dietary; 32222-06-3/Calcitriol; 7440-70-2/Calcium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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