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human experiments can be performed with as little as 1 alorocurie of
activity taking into consideration the large biological dilution. Activity
from 100 wicorocuriés of
labeled glycine fed to a human can be followed
for nine sonths.
Brookheven Conference on the Chemistry and Physiology of the Nucleus:
A&A conference was held at the Brookhaven National Laboratory on the
Chemistry and Physiolegy of the Nucleus. This was « well planned conferene
divided into aix sections covering thres days, and was attended by sore than
250 visiting scientists in addition to the staff of the BMology Departaent.
Dr. Felix Haurowits (Indiana) gave evidence that the varun glebulius have
two sorts of specificity.
The first is due to the nuaber and sequence ef
amino acids in the peptide chain and is unchangeable and gene deterained in
each animal species. The second is the changeable antibedy function and is
due to the surface configuration of the melecaless ‘The latter appears to be
determined by the injected antigens and not by genes.
A report was given by Dr. O. Fe Binkley (Utah) on meleto seids which
may themselves act as enzymes.
Dr. Joseph Weiss (Durham, England) gave an
account of the effects of
tion on inorganic and organic chemical
compounds. The effects of
on moleie acids resulted in fragmentations
of the nucleotides with liberation of free purines and inorganic phosphate..
These results may be significant in visualising the changes produced by
radiation on living celis and nuclei.
Dr. Arnold H. Sparrow (Brookhaven National Leboratory) reviewed the
sensitivity of the different stages in molear diviaion in plant cells to
radiation. Breakage and mutations occur more frequently at metaphase, and
appear to be unrelated to the relative ascunts of desoxyribose nucleic acid.
Dr. Es D. Delamater and Dr. Stuart Madd (Pennsylvania) found by using
both light microscope and electron microscope that bacteria possess nuclei,
mitotic spindles, and chromosomes, like othar celis.
Cataractas:
All mice exposed sven to the lowest neutron fiux at Operation Greenhouse
developed eye cataracts within § weeks afterthe eparation.
cartainty that these cataracts will be permanent.
There is no
.
MEDICINE BRANCH
Argonne Cancer Hospitals
Construction on the Argome Cancer Hospital after some delays last
spring 1s progressing rapidly andcompletion is anticipated for approxina ely
16—50565-1
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