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ae Sas RecentstudiesatBrookhares:-include'‘the: effects:of:X-redi: fon¢
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various “plants?a9In:experimenting with’,a:Tily, ‘as:a‘typical plant;
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a we interesting reaction was noticed.’
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frequently if the radiation is given when the dividing cells. are
diplotene stage, immediately preceding the actual division of the
nucleus.
It has teen found that nucleic acid (DNA) is actively sypthesized up to that time, and then remains constant. Thus it is belikved
that chromosome breakage, or mutation, is associated with DNA synthesis,
even though this is not the only factor in radiosensitivity.
Protective Chemicals to Living Cells
-
The protective action of certain chemicals against irradiat -Orl
damage to living cells continues to be a subject of major interest at
ORNL. High oxygen concentration is directly related to death by X firradiation, and most chemicals which give increased protection agains | radiation damage are oxidizable compounds. Recent work has shown how t is
protective action results. It is shown that these protective chem icals
remove oxygen from within and around bacterial cells, and this dec feases
the concentration of toxic substances formed by the action of X-raTs.
Radiation Instruments Catalog
Preparation of the 1952 edition of the Radiation Instrument
Catalog has been initiated.
The new issue will be about one-third the
present size and will represent a considerable savings in publicat; on costs
and an improvement in format.
Ra-Det
.
The Novenber issue of Ra-Det will include as its feature arficles,
a report on a tritium air monitor developed at Los Alamos Scientif
Laboratory, and a progress report on the development of the specia§ photomultiplier tubes at RCA Laboratories under AEC contract.
well
Both of these items have been of interest to AEC personnel
as to other governmental agencies, and the articles provide considdrable
factual data.
Visitors to Radiation Instruments Branch
In November,
the RIB received 15 visitors from the following
organizations: Ericson Research Laboratory, Radio Corporation of 4 merica
Research Laboratory, Westinghouse Atomic Energy Laboratory, H1-Tror LCS,
Inc., Beckman Instruments, Inc., Nuclear Instruments and Chemical Q or poration, Landsverk Electrometer Company, Office of Naval Research, Nav iy
Department Bureau of Aeronautics,
Bureau of Standards.
5!
Princeton University,
———
and the Nat honal
DOE agcHivEs
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