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Absorption and Utilization of Radioactive Charcoal by Swine¹

Purdue University Agricultural Experiment Station^,3

Abstract

A study was made of the behavior of radioactive wood charcoal following oral administration to growing-fattening swine. The data obtained, although not exact, show that certain mineral elements in hardwood and softwood charcoals were absorbed from the digestive tract and utilized for body function.

At least 58 percent of the total administered activity was excreted in the feces within 120 hours.

Only traces of activity were detected in the urine.

Readily detectable levels of radioactivity were deposited in the bones. Approximately two-thirds of this activity resulted from radioactive calcium and one-third from radioactive phosphorus.

¹ The data in this paper are taken from a thesis submitted by the senior author to the Graduate School of Purdue University in partial fulfillment of the requirements for the Ph.D. degree.

² The authors wish to express their appreciation to the National Mineral Feeds Association, Inc., 212 Equitable Bldg., Des Moines 9, Iowa, for establishing a grant to support this project.

³ Contribution from the Department of Animal Husbandry, Journal Paper No. 672, Purdue University Agricultural Experiment Station, Lafayette, Indiana.