-15-
noted: wt81.185 contributed the major portion of the radioactivity in Scaevola leaves from Kusaie and in Messerschmidia
and Scaevola leaves from Ujelang (Lowman et al. 1959), and
Zn°~ 65 was predominant in fish tissues from Ponape and Utirik.
co?’ was present usually in lesser amounts,
and Co°8 and co?
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 samples.
cgi37,
for example, was found
in plants from Kapingamarangi and Utirik,
a few gamples from Kusaie,
cel41, 144_57144 jy
Ponape and Ujelang,
and mMn>4 in
fish skin and gut from Ponape and clam kidney from Ujelang.
Fe9? was detected once only,
in a sanple 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 Zr95-Nb9>
(half life 65 days),
co98 (71 days) Rut93-pn193 (40 days) and cet4+ (32 days) had
decayed to insignificant or non-detectable levels.
gram sample of yellow-fin tuna from Ponape, however,
were found in low amounts
Ina 16lZr 95-Nb?5
(0.12 uyuc/g at time of counting):
at time of collection the level of zr95-nNb?95 would have been
40 tyc/g.
K49 was present in all samples analyzed.
In some
4