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 ?
A special product line for RIA Novosti's foreign clients includes: R-Sport News Service - English newswire covering the Sochi 2014 Winter Olympic Games and all other major sporting competition in Russia.
2002) examine 381 bilateral FDI flows in 1995 to see if intra-RIA flows are greater for EU and NAFTA members; they do not find a significant impact of RIA membership.
Glennie agreed: "TEI's affinity relationship with RIA complements the Institute's other programs, including our networking opportunities, information exchanges, top-notch educational programs, and effective advocacy on a broad range of administrative and legislative issues.
Media Contact: Ara Jabrayan, RIA Compliance Group, LLC, 561-600-0564, ara@ria-compliance.
We are pleased to welcome RBC GAM as a Sustaining Member of the RIA, said Deb Abbey, chief executive officer for the RIA.
The slope of the regression for RIA salivary Cortisol values <11 nmol/L was not significantly different from the slope for the complete data set (Fig.
For additional information about the TEI discounts on RIA products, members should contact their local RIA representative.
Unlike some other products, RIA indices are conveniently linked to related text.
The group includes West Group, RIA, Thomson & Thomson, and Thomson Corp.
In developing its new turnkey RIA offerings - FDx RIA Basic, Expanded and Premium - FolioDynamix leveraged its deep roster of investment management products, research and pre-negotiated pricing to bundle hosted packages that eliminate the usual costly overhead and lengthy implementation time associated with launching a new wealth management program.
The introduction of a hybrid RIA platform is a natural next step for us," said Tom Halloran, president of Voya Financial Advisors.
Specifically, these activities include: 1) the creation of a new educational program that will meet the needs and requirements of the target Party 2) creation of a web portal dedicated to the issue RIA3) the creation of specialized methodologies as tools for evaluating the impact of partial regulace4) processing model of RIA as visual (model) samples application of individual metodik5) evaluate the effectiveness of the current method of implementation RIA independent consultant to obtain independent recommendations for further improvement of the quality management system, the processing of RIA in the Czech Republic