- 54 elements of nutrition, as well as the elements always
present in man but of unknown function (Heinz Company 1958).
These are not the only elements found in man,
at times barium, boron, cesium,
however,
as
lead, lithium, rubidium,
strontium, tin and titanium also may be present.
Some of
these elements may be of importance to the well-being of
the individual but the presence of most of them is probably
fortuitous.
Also listed in Table IV as part C are elements
with radioisotopes that occur in fallout,
but the elements
of fallout -- such as zirconium,
ruthenium,
niobium,
rhodium,
praseodymium and promethium -- for which there is little or
no data concerning their abundance in sea water or in fish
muscle are excluded.
Also excluded from Table IV,
because
of the uncertainty of their occurrence in sea water, are the
radioisotopes that might be present from the operation of
nuclear-powered ships or from the disposal of radioactive
wastes.
Isotopes that may be discharged to the sea from
the operation of nuclear-powered ships in addition to those
listed in Table IV are crol, cu®4, uel75 ana val82 (was-NRC
$58).
The radioisotopes that would be expected to be
found in the sea from the disposal of radioactive waste and
their maximum permissible concentration factors in fish are