radial immunodiffusion


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Related to radial immunodiffusion: immunoelectrophoresis, Double Immunodiffusion

gel dif·fu·sion pre·cip·i·tin tests in one di·men·sion

precipitin tests in which antigen solution and antibody incorporated in agar are layered in tubes, permitting effective diffusion in the vertical dimension; the antibody-containing agar may be overlaid directly with antigen solution (single [gel] diffusion in one dimension).

radial immunodiffusion

Abbreviation: RID
A means of measuring the amount of antigen in a sample in which a solution containing the antigen is dropped into a gel evenly impregnated with antibody. The diameter of the ring that precipitates around the solution varies directly with the amount of antigen in the solution.
See also: immunodiffusion
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References in periodicals archive ?
Immunochemical quantification of antigens by single radial immunodiffusion.
In addition, radial immunodiffusion did not show any lipase activity within the immunoglobulin precipitation bands.
Effect of processing time and storage on fibrinogen content of EDTA plasma assayed by radial immunodiffusion [Letter].
Most significant in our analysis of these disparate ratios is the high proportion of observations that differ from ideal when radial immunodiffusion was used as the immunologic method for TRF.
the single radial immunodiffusion (SRID) method that uses a kit (Behringwerke AG) for CRP and IgM and the Rantz-Randall (RR) method that uses human type O erythrocytes (Eiken Chemical, Tokyo) for ASO.