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.

RIA

Abbreviation for radioimmunoassay.

RIA

radioimmunoassay.
References in periodicals archive ?
It should always be made clear that no such award should be construed by a client or prospective client as a guarantee that he/she will experience a certain level of results if the RIA is engaged, or continues to be engaged, to provide investment advisory services, nor should it be construed as a current or past endorsement of the RIA by any of its clients.
The OMB should not evade its responsibility to make a yes/no determination or opine why a submitted RIA does not comport with its established guidelines.
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But Taylor acknowledges that the firm has been solicited by broker-dealers offering to fold the practice's investment advisory services under their own RIA.
Secondly, the relationship affords TEI members the opportunity to provide RIA with input on evolving corporate tax needs and how RIA can adapt and enhance its products to satisfy those needs," Mr.
While meeting with Vladimir Potanin, chief executive officer of Russian investment company Interros, RIA Novosti said Putin pledged state support for Interros' joint hydrogen power engineering research efforts with the Russian Academy of Sciences (RAS).
But a client with an individual bond portfolio through a fee-only RIA typically pays only a charge per transaction for bond purchases and sales.
For example, according to RIA, North American orders for packaging and palletizing robots grew by 50% in 2004.
RIA can provide the right product at the right price to match your connectivity requirements.
Worldwide Computer Products News-3 November 2004-Ariaware announces open-source RIA platform(C)1995-2004 M2 COMMUNICATIONS LTD http://www.
NSA members can also obtain special discounts on many best-selling products from RIA and Warren, Gorham & Lamont.