radial immunodiffusion


Also found in: Dictionary, Thesaurus, Legal, Encyclopedia, Wikipedia.
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
Mentioned in ?
References in periodicals archive ?
Radial immunodiffusion disks were prepared by dissolving 30 mL/L of a specific antiserum against human immunoglobulins (IgG, IgM, and IgA) and [[alpha].
Similar findings were obtained in plasma samples stored at 0, 1, 4, and 7 days and assayed fibrinogen by radial immunodiffusion [30].
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.