A new P32 labelled colloidal complex was introduced into the main trunk of the portal vein of the rabbit in order to examine its fixation and distribution within the liver. The dispersion percentage of the radiocolloid in the organism was minimal. Measurement of the radioactivity and autoradiohistographies would indicate a high stability of the preparation even some time after (2 months). Results are of particular significance when compared to those obtained with the introduction of the same radiocolloid into the general circulation.
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