Linked Life Data

9631939

Source:http://linkedlifedata.com/resource/pubmed/id/9631939

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-8-24
pubmed:abstractText
The effect of citrate and pyrophosphate on the stability of calcium oxalate dihydrate (COD) was studied in an aqueous solution over 7 days. COD was precipitated from 1.0 x 10(-2) mol/l calcium oxalate solution with the addition of citrate and/or pyrophosphate and separated by centrifugation immediately, 48 h and 7 days after the precipitation. The percentage of COD in the precipitate, determined by X-ray diffraction, increased with a rise in citrate or pyrophosphate concentration and reached > or =90% at a citrate concentration of 1.0 x 10(-3) mol/l or a pyrophosphate concentration of 2.0 x 10(-4) mol/l. The resulting COD was completely transformed into calcium oxalate monohydrate within 48 h when the precipitate was composed of <90% COD. Nearly pure COD produced with pyrophosphate was stable over 7 days while that with citrate underwent partial transformation within 48 h. An additive effect of citrate and pyrophosphate was found on the stability of COD. It was concluded that a pyrophosphate concentration above a critical point was sufficient to prevent solution-mediated transformation of COD, and this critical point might be lowered to the physiological range with the presence of citrate.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0300-5623
pubmed:author
pubmed:issnType
Print
pubmed:volume
26
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
83-8
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Effect of citrate and pyrophosphate on the stability of calcium oxalate dihydrate.
pubmed:affiliation
Department of Urology, Jichi Medical School, Tochigi-ken, Japan.
pubmed:publicationType
Journal Article, In Vitro