Dwyer, u- J.3 Kean, D. W.3 Stevens, D. J.3 and Titterton,
B.W. SEARCH POR FALLOUT IN AUSTRALIA FROM THE CHRISTMAS
ISLAND TESTS.
(1957).
26.
Australianof
Journs,
20, 39-1
Eckelmann, W. R.3 mules J. Les and Schulert, A. R.
STRONTIUM-90 IN MAN,
II. Science 127, 266-7% (1958).
Further investigation of strontium-90 in man is reported,
with much detailed information. For any given locality,
the Sr-90 content of adult bone is independent of age.
Regional differences are much smaller than the differences
in total fallout. The average concentration of strontium90 in the skeleton of North American and European children
was about 0.7 micromicrocuries of strontium-90 per gram of
calcium, whereas that for adults it was about one-tenth
that figure. Increase in the strontium-90 content of the
diet follows that of the total integrated fallout, but the
level in bones lags behind, because of delay in reaching
equilibrium.
If there were no further atomic tests after
we ne eat NY oro
ee enenN Na Sen
25.
mid-1957, children in the northeastern United States would
reach a peak level of 2.9 micromicrocuries of strontium-90
per gram of calcium.
If testing continues at a rate that
a certain region receives 10 millicuries per square nile
per year (the rate in northeastern United States in 1956-
57) the equilibrium bone level for the population will be-
21 micromicrocuries of strontium-90 per gram of calcium.
Egawa, Tomoji
SUMMARY OF "EFFECT OF HYDROGEN BOMB EXPLOSION ON THE RICE
AND VEGETABLES".
KagakuAsahi
2p.
(195%).
cee
~
Eisenbud, Merril
GLOBAL DISTRIBUTION OF RADIOACTIVITY FROM NUCLEAR DETONA~
TIONS, WITH SPECIAL REFERENCE TO STRONTIUM. Journalof
S
47, 180-8 (1957).
Global studies of Sr?° under Project Sunshine by monitoreing and collection techniques for documenting local and
intermediate radioactive fallout from the troposphere and
tropopause meterologically distributed are detadied and
correlated wage global soil measurements of Sr7¥.
Confirmed Sr
reserve in the stratosphere is estimated
by computation of the integrated dosage from the detonation less ggcet and global deposition. Since the halflife of Sr7¥
is 28 years and the mean residence time in
the stratosphere is some time less, radioactive decay of
Sr90 is not employed in estimating the subsequent uniform
deposition of the earth's surface.
8
(eont'd.d