On the Radioactivity of the Blood in the Cock after the Injectioon of the Radioisotope-P³²

Subcutaneous injection of labelled phosphate (p32) on adult cocks of domestic fowl was followed by daily measurement of radioactivity of the blood for 9-16 days. Separate readings for the blood corpuscles and serum were done on the last day of the experiment when the cocks were slaughtered. The experiments were repeated four times, twice in July and once in September and in October. Two cocks were used for each, totaling eight in number. The radioactivity of the blood was already evident on the next day of the experiment and it rapidly went up, reaching top value in 5-9 days. This value was usually maintained until the end of the experiment. Difference in the values was found between the summer and autumn series, the former decidedly lower than the latter. Yet seasonal effects could not be accounted for it. Radioactivity was remarkably higher in the blood corpuscles than in the serum, a condition which points to the fact that the corpuscles are largely responsible for the mechanism.Article信州大学農学部学術報告 6: 48-52(1958)departmental bulletin pape