RIA


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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.
References in periodicals archive ?
To support this process, RIA firms should provide training to advisers with regard to client communications.
Danny Mac, who played Mark "Dodger" Savage in Hollyoaks, from 2011 to 2015, and reached the final of BBC1's Strictly Come Dancing in 2016, says of Ria: "She's an absolute triumph in the show and such a joy to work with.
Elliot Weissbluth, CEO and founder of RIA aggregator firm HighTower, said in December at the DeVoe M&A + Succession Summit in Miami Beach that the advisory industry is "at the very beginning of consolidation," and that "it's for all very good reasons."
Advertisements containing direct or indirect references to awards also raise the concern that the RIA is advertising prohibited testimonials, because the awards may reflect the positive experiences of the RIA's clients.
These previous studies measured the samples by RIA and ELISA simultaneously, whereas this study measured the samples by ELISA after a long interval from the measurement by RIA.
A fifth child would later arrive - in a birth which almost cost Ria her life.
Summary: Ria's regional headquarters in Dubai to serve as base for GCC expansion
He wants me to maximize my intelligence,' said actress Ria Atayde, when asked what advice her elder brother, actor Arjo Atayde, would often give her in relation to working in show business.