- 24 cesium, celative to potassium in the milk, is about two-fold,
not too dissimilar from the diccrimination factor againet
strontium, relative to caléiun in miik. eety lo el oe oe
They found, however, that the humar. content of cesium-137
Fs
aid not + se apvceciabiy
pr
J feom the value of 4141.3 micromicro-
curies pez gram of potassium in i956 to the 1957 vaiue of
£4 £1.1.
Thic cmaii change, together with the fact that cesium
is an icotope which chouid come into wapia equilibcium with the
ihuman body because it: mean residence time is oniy some 125 days
as compared to many years for strontium-93.
Therefore, the human
bouy is obviously very neavly in equilibrium witn the food chain
in the case of cesium ii cnarp contrast to strontium-9J anc
we can therefore seduce from tne cesium content sometnin, avout
the pocsivile way. in which fallout enter. che biorphere. Ficst,
the fact that chee wac no iaxle cice between 1950 and 195,,
tcolethne: with ine facc that certain ovcle:vations om che
seventium-9o contenc of mizk and cueeres oves tne yearc inaicatec
cnat they t290
9 wot vise as vapidiy as tne total faliout
occerved in tne ofl, cugsects that gorcaubly a large past of
tue fasiouc wilch enters tue tbiospuere does uo vy victue of
the pickup divectiy on che leaves cf vrave anu vezetabies which
ave eaten u.cect.y, either vy cowc ox by pevgie with tue -erult
that an entively alfiferent apovoach co tue question »f tne
falsout ruazavcd i: made.
Of. course
9
it iv aovoluteiy certain ctnaac
“v-
Dow ARCHIVES ~
%
eeeee = malian sah ae