Chemical Studies on Radioactive Indicators. XXI. Carrier Free Separation of Technetium.

Giant radioactive halos: indicators of unknown radioactivity?

A new group of giant radioactive halos has been found with radii in excess of anything previously discovered. Since alternate explanations for these giant halos are inconclusive at present, the possibility is considered that they originate with unknown alpha radioactivity, either from isomers of known elements or from superheavy elements.

A new electrophoretic method for determining ligand: technetium stoichiometry in carrier free 99mTc-radiopharmaceuticals.

An electrophoretic procedure is outlined for the determination of the number of ligands bound to technetium-99m radiopharmaceuticals. The approach involves use of ligands that will complex technetium in a similar fashion but that differ in charge. This approach was applied experimentally to dimercapto ligands in which the ligating sulfur atoms are separated by a flexible three-carbon chain (1,3...

Comparative studies of extraction chromatography and electro-amalgamation separation to produce no-carrier added 177Lu by Tehran research reactor

Introduction:Owing to its favorable radionuclidic characteristics, such as tl/2 = 6.73 day and Eβ (max) = 497 keV and ease of its large-scale production using medium flux research reactors, lutetium-177 (177Lu) is an attractive radionuclide for various therapeutic applications. No carrier added (NCA) 177Lu was obtained by thermal neut...

The use of biologically prepared radioactive indicators in metabolic studies: metabolism of pentobarbital.

Although isotopic labeling has been of great use in studies of drug metabolism, the necessarily small amounts of material used in such experiments often preclude the identification of unknown metabolites by conventional chemical means. Such difficulties are commonly circumvented by adding a known non-labeled compound, suspected to be a metabolite, to the unknown mixture and reisolating the subs...

Brushing up on use of chemical indicators.