Radioimmunoassay (RIA) is a very sensitive in vitro assay technique used to measure concentrations of antigens (for example, hormone levels in the blood) by use of antibodies. As such, it can be seen as the inverse of a radiobinding assay, which quantifies an antibody by use of corresponding antigens. Although the RIA technique is extremely sensit...
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http://en.wikipedia.org/wiki/Radioimmunoassay
(from the article `Yalow, Rosalyn S.`) American medical physicist and joint recipient (with Andrew V. Schally and Roger Guillemin) of the 1977 Nobel Prize for Physiology or Medicine, ... ...of a technique to produce large quantities of monoclonal antibodies, which bind to only one specific antigen. The sensitivity of antigen-antibody .....
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http://www.britannica.com/eb/a-z/r/4
<investigation, technique> Any system for testing antigen antibody reactions in which use is made of radioactive labelling of antigen or antibody to detect the extent of the reaction. ... (18 Nov 1997) ...
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http://www.encyclo.co.uk/local/20973
(RIA) (ra″de-o-im″u-no-as´a) a sensitive assay method that can be used for the measurement of tiny amounts of specific antibodies or any antigen, such as a hormone or drug, against which specific antibodies can be raised; it is the standard method for clinical laboratory measurements ...
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Any system for testing antigen-antibody reactions in which use is made of radioactive labelling of antigen or antibody to detect the extent of the reaction.
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http://www.encyclo.co.uk/visitor-contributions.php
(RIA) Type: Term Pronunciation: rā′dē-ō-im′yū-nō-as′sā Definitions: 1. An immunologic (immunochemical) procedure that uses competitive inhibition between a radioisotope-labeled antigen or other substance and unlabeled antigen for antiserums, binding as a means to quantify the agent of interest;...
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http://www.medilexicon.com/medicaldictionary.php?t=74950
Radioimmunoassay: A very sensitive, specific laboratory test (assay) using radiolabeled (and unlabeled) substances in an immunological (antibody-antigen) reaction.
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http://www.medterms.com/script/main/art.asp?articlekey=5185
[
n] - immunoassay of a substance that has been radioactively labeled
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http://www.webdictionary.co.uk/definition.php?query=radioimmunoassay
noun immunoassay of a substance that has been radioactively labeled
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https://www.encyclo.co.uk/local/20974
A method used to measure the concentration of some hormones.
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https://www.encyclo.co.uk/local/22445
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