105 —— TABLE 43. 2Bi/22Pph Batch No. - = Animal Eqururprium Activiry Ratios or THorttm DauGnrer Proptcts in SPLEEN Code No. Duration 28Ra/2Th 3Ac/*8Ra ™8Th/Ra 4Ra/?8Th @Pb/ARa 22Bi/22Ph 12878 dy pth) Man Man 02 03 49d 49d 0.32%) 0.32 — — — 0.97 0.74 0.74 -— — — — WON4O 3 fay yb) Rat Rat 72 73 35d 38d 0.23% 0.20%) 0.97 0.94 0.47%) 0.41) 0.44 0.38 0,57 0.54 0.72 0.65 13098 Ay Ratt Rat Dog Man 65 67 ‘8 83 20d 4Id 21d 26d — 0.24 0.25 0.22 — 0.94 — — 0.98 —_ 0.90 0.87 — 0.28 0.37 0.63 — 0.50 0.50 — — 0.59 — —_ 85 48d — 0.94 —_ — — — 0.43 0.44 0.37 0.36 0.36 mA). dite) — — 0.97 1.03 _ 0.74 — _ — _— 0.25 0.97 0.84 0.51 0.45 0.66 Man 3 ? Rat. Rat Rat Rat TH2 TH3 TH4 FHS 18m 22m 12m 22m Man Man 66 166 lly 26y 0,21 0.25 0.23@ 0.22@ 0.19 Weighted — 1.0 1.1 — 0.64 0.42 0.41 0.21 <0.5 0.43 —_— 1.0 — —_ — ial meant iorbed on ’ Possibly an overestimate since no account was taken of the small amountof activity which may have been left absorbed on the wills of the Thorotrast ampoule. Approximate time stnce manufacture, calculated from 7%Ra/2°Th ratio. injection, ‘This animal was not typical in that, due to a poor injection, most of the Thorotrast was retained at the site of the injection in che (Cail. -? Calculation based on an assumed 2%Th/2"*Ra ratio of 0.9. ‘' Measured by growth of #%Ra y-activity. 228Ra/ TABLE 44. 4 bl directly RO sing an: tio, fe, the ex- rror, s¢ n error Equitrskitm Activrry Ratios or THorrem DauGHTER Propvuctrs 1n KIDNEY Ratch No.| Anima] Code No. Duration 89940 4 6y) Rat Rat 72 73 35d 38d 13098 ‘4yy) Rat Rat Dog 65 67 78 20d Ald 21d Man Man 83 85 26d 48d Rat TH3 22m Rat THS5 22m ided int ng faefelt to Rat aust be yus ing Rat ? : Man Man Weighted TH2 TH4 66 166 *Ra/2Th 1.03 1.5 2%Ac/@8Ra 1.4 1.5 — — — — >1 — — -~ — 12m — — — lly ~0.2 — 18m 26y — — — — 1.2 %Th/8Ra 2.5 2.9 Ra/28Th 0.64 0.90 |2@Pbh/4Ra 3.5 3.4 0.91 1.18 1.07 0.94 — ~1 1.1 ~1 >5 >7 4.8 ~? — — ~1 ~3 — — ~1 wT — — — — 1.4 0.95 0.98 — — ~2 ~2 1.4 — ~l ~w2 1.1 — ~1 0.9 — ~l owt 4.7 — — 4.7 22Bi/22Pb 1.5 1.6 1.6 2.0 2.7(a) <1) — — 2.3 1.9 1.8 — — — 1.9 hear a “” Kidney cortex. bi Kidney medulla. f ‘ @Pb was generally readily measurable in kidney samples. However the values of #2Pb/2*Ra ratio could only be determined *hroximately in most cases because of the low activities of ?*Ra, which could not be measured precisely.