~—.
to absolutely dotcraines,
The nezt
slide shows the effect ef concentration,
Ve wore rather surprised,
HEernlt Larson mentioned this sang
pheronenon yosterday, which ho has observed -- namoly, althousn
.
noss
ee
by
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o
Ha]
eb
Gosivablie thin? to prevent or decrease the absorp
pu
with the various isotones it has renerally been considsred the
various radio isotoves by co-treatment with the non-radioactive
ecarricr clonont.
By this co-tveatment, it has always been felt
that you dilute the specific activity and, thus, a plant or
animal is not going to take uy as mush,
You all know this is
trues dn the case of icdine in the thyroid.
I2 you give iodine
-_.
-- 127 along with a dose of icdine-151, the ovganism is not
, going to concentrate in the thyroid giand as much of the I-131
as if you had not given this carricr alons with it.
not hold true for the plants.
This does
This is a los scale here, so it
spans over quite a diversity of concentrations.
és you increase
the concentraticn, there is a tendency for an increased absorption
of the radio element.
This simply says that the plant over in hore (indicatin;)
has -- well, conparcd to this, it has five orders of magnitude
more eloneat in it than over here.
if you are studyin? iodine, °
there is fiva orders of magnitude iodino in a plant over in hore
(indicating) because we are using the I-151 simply as a tracer.
The I-151 or strontiua, or Whatever you ars usin, is
kept constant.
This is morely the porcentase uptake,
The percent: