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radioimmunoassay

 (RIA) [ra″de-o-im″u-no-as´a]
a sensitive assay method that can be used for the measurement of minute quantities of specific antibodies or any antigen, such as a hormone or drug, against which specific antibodies can be raised. An assay for a specific hormone uses antihormone antibody produced by injecting the human hormone into an animal, such as a rabbit, and hormone that has been labeled with a radioisotope. These are mixed with the assay specimen and the antigen (hormone) bound to antibody is separated from the unbound antigen by chromatography or other means. Because any hormone in the assay specimen competes with the radiolabeled hormone for antibody binding sites, the amount of hormone in the specimen is inversely proportional to the radioactivity of the bound fraction or directly proportional to the activity of the free fraction. This is the standard method for clinical laboratory measurements of hormones and is also used for therapeutic drug monitoring, drug abuse screening, and other laboratory tests.

RIA

Abbreviation for radioimmunoassay.

RIA

abbr.
radioimmunoassay

RIA

abbreviation for radioimmunoassay.

RIA

Abbreviation for radioimmunoassay.

RIA

radioimmunoassay.
References in periodicals archive ?
Before moving in, we worked with Durham County Council conservation officers to comprehensively restore the original Grade II-listed building, provide new services and sympathetically rebuild the original form of courtyard buildings, creating the property as it stands today," said Mr Spry.
Critics of I, Spry have suggested that it is biased and does not reflect ASIO's successes.
Spry, pictured, is essentially a fitness coach, but his contribution will help Strachan considerably.
Fizzik is a creation of Spry Hive Industries LLC, Microsoft Bizspark partner and developer of next-generation Internet applications based in Kirkland, Washington.
Although Spry and his pals carried out the burglary without being disturbed, the neighbour noticed them loitering in the area.
Balers purchased by auto recyclers can be used for purposes beyond compressing car bodies, Spry notes.
Judge Simon Darwall-Smith told Spry that this was the worst case he had come across in 40 years in law.
During the four-week trial the jury at Bristol Crown Court heard harrowing evidence of how Spry subjected the children to a regime of abuse.
Judge Simon Darwall-Smith told Spry, who stood stony-faced in the dock as she was sentenced, that she was guilty of "collective and substantial brutality".
After Spry was given legal parental responsibility for the children social services had less power to intervene.
Karen Spry shows off the 1920s Banshee motorcycle at the Motor Shed gallery
Jacky Spry spoke after watching Jordan Rees being led away at Cardiff Crown Court yesterday to begin a minimum 15-year jail term for killing her daughter Becky.