Abstract: The invention related to a method of preparing a protein or a proteinaceous material labelled with a metalradionuclide and intended for diagnostic or therapeutic application, by reacting a protein or a proteinaceous material with an agent for coupling the radionuclide to the protein or the proteinaceous material, a protein conjugate being formed, and by then complexing the radionuclide with the conjugate thus formed to a radionuclide complex.

Abstract: Gentisic acid and its derivatives substantially inhibit peptide autoradiolysis. Gentisic acid or its derivatives may also be used in combination with other stabilizers such as inositol and ascorbic acid to inhibit autoradiolysis of radiolabeled peptides.

Abstract: The invention relates to a sterile aqueous solution for radioassaying a radioactive indium compound, which solution is entirely or substantially free from organic solvent, has a pH from 4 to 9, comprises a radioactive indium tropolonate or pyrithionate and has been subjected to a thermal sterilization.The invention also relates to the radioactive labelling of blood cells by treating a suspension of the blood cells with a sterile solution of a radioactive indium compound, in which either (a) a carbon-dioxide-generating substance is previously incorporated in the solution, or (b) a substance which under the labelling conditions generates carbon dioxide is added to the cell suspension, or carbon dioxide is passed through the cell suspension prior to or during the treatment.The invention furthermore relates to a kit for the radioactive labelling of blood cells.

Abstract: There is disclosed an in vivo radioassay process in which a radioactive chelate of indium and an 8-hydroxyquinoline is introduced into a warmblooded animal having an inflammatory reaction in an area in which the chelate would not accumulate to the same extent if the inflammation were not present. The chelate gathers in the inflamed area, for instance, in a body abscess, or other injury, and its location is determined by radio surveying the body by an external imaging technique.

Abstract: There are disclosed aqueous, radioassaying solutions of a chelate of radioactive indium and an 8-hydroxyquinoline, having an essential absence of an organic solvent, e.g., alcohol or chloroform. The solutions are useful in radioassaying warmblooded animals.

Abstract: The present invention provides an improved method for determining the thyroid function by means of an in vitro test using blood serum. Such a method involves an improvement of the procedure whereby (a) a patient's blood serum sample is mixed with a solution containing radioactive thyroxine and with a compound that liberates thyroxine from thyroxine-binding globulin; (b) the test mixture is buffered to achieve proper conditions for carrying out a thyroxine-binding immunoreaction; (c) an antiserum is added to provide antibodies which bind a portion of the thyroxine present by means of such a thyroxine-binding immunoreaction; (d) unbound thyroxine is thereafter separated from the antibody-bound thyroxine; and (e) the relative quantities of bound and unbound thyroxine are then determined by measurement of radioactivity.