Uptake of ³H-labelled commercial toluidine blue and subfractions (thionine, toluidine blue, and azur A) in the parathyroids of rabbits.


Chromatographic separation of ³H-labelled commercial toluidine blue demonstrated four dye fractions. Following i.v. injection into rabbits, the uptakes of the dye mixture and of three separated dye fractions were determined by radioactivity assays of parathyroids, thyroid, and muscle. Mean uptake ratio per g parathyroid/thyroid of the dye mixture was 2.6… (More)


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