Switch to
Predicate | Object |
---|---|
rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
|
pubmed:dateCreated |
1977-3-21
|
pubmed:abstractText |
Low birthweight infants were given calcium enriched in 46Ca in a single feed. The specific activity of successive urine samples showed that the absorption of the marker was largely complete in about 4 hours. The rate of decrease of urinary specific activity after 3 1/2 hours was exponential and very similar in 8 sets of observations in 6 infants. Its extrapolation backwards to 1 hour may indicate the size of the exchangeable calcium pool, usually about 200 mg/kg body weight. Completeness of faecal collection for estimation of 46Ca is essential for accurate determination of true absorption and endogenous faecal excretion of natural Ca. In 5 infants examined, nor marker was detectable in faeces excreted later than 48 hours after the first stool containing marker. Nevertheless, reasons are given why a collection period limited to 48 hours may sometimes involve error.
|
pubmed:commentsCorrections | |
pubmed:language |
eng
|
pubmed:journal | |
pubmed:citationSubset |
IM
|
pubmed:chemical | |
pubmed:status |
MEDLINE
|
pubmed:month |
Jan
|
pubmed:issn |
1468-2044
|
pubmed:author | |
pubmed:issnType |
Electronic
|
pubmed:volume |
52
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
50-55
|
pubmed:dateRevised |
2009-11-18
|
pubmed:meshHeading |
pubmed-meshheading:836054-Calcium,
pubmed-meshheading:836054-Calcium Isotopes,
pubmed-meshheading:836054-Feces,
pubmed-meshheading:836054-Humans,
pubmed-meshheading:836054-Infant,
pubmed-meshheading:836054-Infant, Low Birth Weight,
pubmed-meshheading:836054-Infant, Newborn,
pubmed-meshheading:836054-Intestinal Absorption,
pubmed-meshheading:836054-Kidney,
pubmed-meshheading:836054-Time Factors
|
pubmed:year |
1977
|
pubmed:articleTitle |
Urinary and faecal excretion of marker calcium (46Ca) by low birthweight infants.
|
pubmed:publicationType |
Journal Article
|