Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1977-7-18
pubmed:abstractText
Platelet factor 4 (heparin neutralizing) activity shortens the thrombin time of a heparinized plasma. In the proposed procedure (I) a heparin thrombin time curve is constructed by adding gradually increasing amounts of heparin to a commercial plasma substrate and determining thrombin times, (2) a suitable concentration of heparin that gives highest reproducible thrombin time is selected and added to the substrate, (3) thrombin times are determined for the heparinized substrate before and after addition of a test material containing platelet factor 4. The two thrombin times are converted to heparin concentration by reference to the heparin thrombin time curve. The difference in heparin concentrations represents platelet factor 4 activity. When lyophilized commercial plasma is used as substrate larger quantities of heparin can be employed in the system, resulting in improved sensitivity and precision.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0002-9173
pubmed:author
pubmed:issnType
Print
pubmed:volume
67
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
533-6
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1977
pubmed:articleTitle
An improved procedure for quantitation of platelet factor 4.
pubmed:publicationType
Journal Article