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isotopes be derived from their present theraneuti
important thoush

this epplicsation is,

w.ather does it seem ths

greatest advantese of ra€iowisotopes will core from their use as a ree
Search tocl in pushine tack the frontiers of

ence,

‘Their particular

application in biology is in Yurtherins the ssudy of cell vhysiologr,
As eonceri.s reéiation, >

it

is the ersunt of redieticon absorbed b

ionization which produces biclogical reeoctians.

radiction energy is abe

sorbed in the tissues by the process of losizgaticn,

Tue exect steps in

the pnysicoechemicsl chanves resulting from these fonizations are not
Kknoeno

Problems yst to be solvec in the use cf controll: d nvelecr enerey

deel chances resulting from expceure wo nirime
{2}

on

selective ealteratior of tissus ecasitiviiw co

various avpes of

radiation,

(3)

protesticn of tissue epainss ths ¢elevertous efvects of radie

ation,
(4)

finding a theraocutic meecure bo sm liori.te Jamase cnd hasten

reccvery once demege hes ensued from racetion.

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