The extent of metabolism of propionate and butyrate during absorption from the bovine ruminoreticulum

Evaluation of a direct method for measuring absorption from the gut

“…Some workers have neglected this pos sibility (Fries and Conner, 1960;Carr and Jacobson, 1968). Others have measured arterial and portal packed cell volumes or hemoglobin concentrations but no significant differences were found (Roe et al, 1966;Weigand, 1971)…”