SESSION IV
21)
FREMONT-SMITH:
these pecple?
Did you do any cultures of white cells on
CONARD: Yes, at 10 years we did about 40 cultures for chromosomal studies.
,
FREMONT-SMITH:
CONARD:
aberration.
Did they show anything out of the usual?
They showed persisting aberrations, low levéls of
FREMONT-SMITH:
More thar. other people would have?
CONARD: The exposed people showed a greater incidence of
these aberrations than did the unexposed.
EISENBUD: I think it should be emphasized that those doses that
you show in Figure 42, when translated inco dose units, are just a
couple of hundred milligrams.
‘
CONARD:
I was going to get around to that in a minute,
EISENBUD: Sorry, I didn't meanto anticipate.
CONARD: Another isotope that was found was cobalt-60, toa
lesser extent, which is about 1/10 the zinc level. We haven't seen
any iron-55 in the people but we haven't done any specific studies.
EISENBUD: Any what?
Have you looked for it?
CONARD: Not specifically, no, but we haven't had whole-body.
counts now ina couple of years.
EISENBUD: You can't do it with whole-body counting.
by internal conversion and gives you an electron...
CONARD:
EISENBUD:
It-decays
Maybe we'll pick it up in the urine,
No.
Sample blood.
Maybe you have some in your
laboratory. What you do is separate out the iron-55 and look at it
with a thin crystal. It should be very interesting in that group to
see what the iron-55 level is. Iron-55 is an interesting isotope. It has
been neglected until now because the emission is a 6 KeV electron
which has a range of only one micron in tissue; it has generally been