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 ?
Currently, e-books can take full advantage of the power of computational tools to incorporate rich interaction with all kinds of visuo-textual information.
the rich interaction that crucially constrains the behaviour of such systems is poorly taken into account in the actual models;
In the news release, Verizon Business Puts Managed Hosting Customers in the Driver's Seat, issued earlier today by Verizon Business over PR Newswire, the fifth paragraph, first sentence, should read "'Verizon Business is witnessing a sea change in how businesses and their employees are embracing the Internet as a medium for rich interaction,' said Nancy Gofus, senior vice president, global business products, Verizon.
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Now, our next frontier is adding the smartphone as an emerging rich interaction channel to add to the mix.
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On campus at Reece Academy, one will experience the rich interaction between students and their learning environment.
A fresh cultural shift now focuses on the myriad possibilities of using the Web as a medium for rich interaction with well-targeted audiences and market segments.
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Vizimo works with broadcasters and media providers to foster a multi-level relationship with customers that leverages rich interaction and its proprietary recommendation and profiling platform.
Business professionals can quickly create rich interaction with their prospects, customers, partners and suppliers.
Ultimately, this rich interaction and collaboration enables SkillSoft to continue delivering solutions that enable our customers to unlock the value of e-learning.