Table 2— AVERAGE CONCENTRATIONS OF !3!1 IN PLANT SAMPLES AND IN THE
STOMACH CONTENTS AND THE THYROIDS OF RABBITS COLLECTED FROM
DIFFERENT PARTS OF THE SEDAN FALLOUT FIELD AT VARIOUS TIMES
AFTER THE DETONATION*
Study
ays
areas
detonation
Groom
Valley
Penoyer
Valley
Railroad
Sk
5
11966
+33%
20
1224
+49%
+39%
+34%
n
ne 1] per thyroid
x
Sx
5
5194
+29%
5
5
424
o
5
1283
1018
+32%
+47%
n
4
5
x
sx
467
4+34%
83
+35%
386
139
+43%
+52%
n
5
4
5
+28%
5
526
273
+36%
+30%
2
5
161
149
+50%
+32%
5
5
61
16
+31%
4+31%
3
5
5
10
15
20
25
30
1244
659
412
227
192
8l
+33%
+30%
+36%
+46%
+64%
+41%
5
3
5
5
3
5
1853
1212
638
311
115
81
+31%
+20%
+17%
+40%
+44%
+52%
5
4
4
5
5
4
257
141
88
40
29
1.5
+34%
+14%
+34%
+48%
+52%
+70%
5
4
5
3
5
3
713
+11%
5
693
+41%
2
111
+65%
5
75
419%
5
29
+52%
10
15
20
376
211
119
+10%
+11%
+17%
5
5
5
30
48
+25%
5
5
10
501
200
+15%
+20%
15
20
20
30
121
56
35
26
5
10
15
20
25
25
Currant
Area
6671
3192
Rabbit thyroids,
pe 8!I/g (dry)
25
30
5
Valley
pe 81]/g (dry)
x
10
15
Rabbit stomach
contents,
Plant samples,
All areas
30
Pre-Sedan
concentrations
+34%
+39%
+31%
4
3
5
33
+24%
4
5
5
322
57
437%
+12%
+57%
+27%
+26%
+15%
5
5
3
5
46
42
28
7
3606
+40%
20
2506
1977
984
406
212
+44%
440%
+43%
+32%
20
20
20
20
96
113
+14%
+27%
20
312 457% 14
604
348
148
838
554
231
96
69
4
+36%
+34%
+45%
3°
o
3
ll
427%
5
3
3
26
7
+27%
+23%
5
5
+28%
+36%
+50%
+438%
4
5
4
5
6
6
1.6
1.1
+50%
+30%
+10%
+34%
3
O
2
5
+29%
15
221
+28%
19
+21%
+31%
+23%
+27%
15
16
20
19
143
74
38
30
+34%
+36%
+26%
+27%
18
20
20
20
5.4
+61% 15
+29%
18
207 +51% 17
85
61
22
5
12
+50%
5
20
*xX = mean, Sx = standard error expressed as a percentage of the mean, and
n = number of samples. (Based on data given by Turner and Martin. !§)
rate applicable to the accumulation of ‘*/I in the thyroid was taken as
100 ¢ of dry plant material per whole thyroid per rabbit per day.
As shown in Table 1 and Fig. 3, the apparent rate of 83Ssr loss from
fallout-contaminated plants tended to decrease with increasing time
after the detonation, but the average effective half-life, T,, from D+ 5
to D+ 30 (5 to 30 days after the detonation) was approximately 18 days.
The average concentration of ®*Sr in bone ash, B;, increased rapidly
from D + 5 to D+ 15 and then more slowly to a maximum (apparent