Table 6. Total Americium-241 Present in 250 g Rumen Contents (Mass Basis) Trial-6 Trial-7 01/19/75 01/21/75 01/29/75 Trial-9* Trial-10 Trial-11 333.6 366.9 22.0 350.0 121.1 269.7 4.9 465.3 115.3 388.2 275.4 370.3 404.0 282.3 24.5 372.8 68.6 399.7 15.5 380.0 118.5 390.7 204.7 402.4 474.3 244.6 46.0 96.2 70.3 339.6 5.6 375.9 92.8 263.9 218.4 357.5 348.3 101.8 11/05/74 Trial-8 03/12/75 05/29/75 Abomasum, End pH 3 24lam x 10-© (ug) 239pu/24 lam Duodenum, pH 4.5 OCT 241am x 10-© (ug) 239py/24 lam Jejunum, pH 6 Bile & Enzymes, 2 hrs 24lam x 10°© (ug) 239pu/24 lam Lower Intestine, pH 7.5 Bile & Enzymes, 2 hrs 24lam x 10-© (ug) 239pu/24 lam *Quter enclosure. 345.7 30.7 72.6 453.3 6.4 333.6 113.8 — 384.6 277.8 403.6