35-
3.
The radioisotopic composition of
the
plankton and other marine
organisms was determined by means of ion-exchange separations and
gamma spectrum analyses.
4,
Np239 was the major radioisotope present
in all of
the samples,
contributing more than 50 per cent of the total radioactivity.
5.
Other radioisotopes present in the plankton in the order of contri-
bution were: Te!32-7132) yyo99-7-99M, Bal40-7,,140 237 Gel 4iPri41, Ryl03_Rpy 103 | Zr95-Nb?> and Ce!44-pri44,
Ryul05_-RH195
and Ru196-Ry196 were detected only Once,
6.
Small whole fish contained essentially the same radioisotopes as
the plankton.
A liver
sample
froma
large dolphin (fish) contained
only Np239, Ru!03-ph103, and Te!32-1132,
7.
Shrimp and squid samples concentrated Np239 and Te!32-7132
but contained no Mo29-Te99™ |