Radioimmune method of assaying quantitatively for a hapten
申请人:Biological Developments, Inc.
公开号:US03940475A1
公开(公告)日:1976-02-24
A radioimmune method of assaying quantitatively for a hapten comprising contacting an aqueous sample containing the hapten under assay, a known quantity of a radioactively labeled marker which incorporates a hapten homologous to the hapten under assay, and an insolubilized antibody specific for the hapten under assay to competitively bind part of said labeled hapten and the hapten contained in said sample to the antibody; incubating the foregoing mixture until a two-phase system is produced comprising an insoluble or solid phase and an aqueous phase, and measuring the radioactivity of at least one of said two phases, the value of said radioactivity being a function of the concentration in said sample of the hapten under assay.
Haptens and antigen derivatives are coupled, through an azo bond, to proteins to form a conjugated material. The conjugate is injected into laboratory animals to raise antibodies which are useful in immunochemically assaying for the original haptens and antigen derivatives. Included among the immunochemical assay methods are radio-immune assays and fluorescence methods.
Photographic elements containing nondiffusible 6-(2-thienylazo)-3-pyridinol cyan dye-releasing compounds
申请人:EASTMAN KODAK COMPANY
(a New Jersey corporation)
公开号:EP0063808A1
公开(公告)日:1982-11-03
Photographic elements are described which employ nondiffusible compounds having a releasable 6-(2-thienylazo)-3-pyridinol cyan dye moiety or precursor thereof, the compounds containing:
(a) in the 3-position of the thienylazo moiety a carboxy group, a salt thereof or a hydrolyzable precursor thereof; and
(b) a ballasted carrier moiety which is capable of releasing the diffusible 6-(2-thienylazo)-3-pyridinol dye moiety or precursor thereof under alkaline conditions.