-15-
noted: w8l1,185 contributed the major portion of the radio-~
activity in Scaevola leaves from Kusaie and in Messerschmidia
and Scaevola leaves from Ujelang (Lowman etal. 1959), and
gn°> was predominant in fish tissues from Ponape and Utirik.
Co? was present usually in lesser amounts,
and co°8 ana €o°9
were found only in a sample of clam kidney from Ujelang and a
fish liver sample from Utirik.
Other radioisotopes were
present only in a few gamples.
cst37,
for example, was found
in plants from Kapingamarangi and Utirik, Cel4l, 144_py144 jy
:
a few samples from Kusaie,
Ponape and Ujelang, and mn?4 in
fish skin and gut from Ponape and clam kidney from Ujelang.
Fe? was detected once only,
in a sample of skipjack muscle
from Ponape.
The quantitative results of the gamma spectrum analyses
shown in Table 3 are based on analyses made approximately
eighteen months after the samples were collected: consequently
the shorter-lived radioisotopes Zr 95 ~Nb?>
Co78
(71 days)
RutO3_py103
(40 days)
(half life 65 days),
and cel4l
(32 days) had
decayed to insignificant or non-detectable levels.
gram sample of yellow-fin tuna from Ponape, however,
Ina 16lZr?5-Nb99
were found in low amounts (0.12 pyc/g at time of counting):
at time of collection the level of 2r95-nb95 would have been
40 puc/g.
«40 was present in all samples analyzed.
In some
OF ARCHES ES