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Metabolism of ¹⁴C-Labeled Octadecane by Cattle^{1, 2,}

Kansas State University, Manhattan 66502

Abstract

¹⁴C labeled octadecane was administered to two rumen-fistulated Jersey cows to determine its metabolic fate. Samples of rumen gases, rumen contents, blood, urine, and feces were collected periodically throughout the experiment to determine ¹⁴C activity. Results indicated octadecane is not efficiently utilized by cattle. Rumen bacteria were able to incorporate some octadecane into bacterial lipids but were otherwise unable to metabolize octadecane. Some octadecane was also absorbed from the digestive tract, transported in the lipid portion of the blood, and incorporated into body fat. Most of the octadecane, however, was eliminated in the feces.

¹ Contribution No. 813, Department of Dairy and Poultry Sciences, Kansas Agricultural Experiment Station, Manhattan.

^₂ Supported in part by a grant from Esso Research and Engineering Co., Linden, New Jersey. The authors wish to acknowledge Gary Harting, Esso Research and Engineering Co., for his assistance with this project.

³ Present address: S. E. Kansas Experiment Station, Mound Valley.