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Mutations induced in Tradescantia by small doses of X-rays and neutrons - Analysis of dose-response curves.Dose-response curves for pink somatic mutations in Tradescantia stamen hairs were analyzed after neutron and X-ray irradiation with doses ranging from a fraction of a rad to the region of saturation. The dose-effect relation for neutrons indicates a linear dependence from 0.01 to 8 rads; between 0.25 and 5 rads, a linear dependence is indicated for X-rays also. As a consequence the relative biological effectiveness reaches a constant value (about 50) at low doses. The observations are in good agreement with the predictions of the theory of dual radiation action and support its interpretation of the effects of radiation on higher organisms. The doubling dose of X-rays was found to be nearly 1 rad.
Document ID
19720048057
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sparrow, A. H.
(Brookhaven National Laboratory Upton, N.Y., United States)
Underbrink, A. G.
Rossi, H. H.
(Columbia University New York, N.Y., United States)
Date Acquired
August 6, 2013
Publication Date
May 26, 1972
Publication Information
Publication: Science
Volume: 176
Subject Category
Biosciences
Accession Number
72A31723
Funding Number(s)
CONTRACT_GRANT: NASA ORDER A-44246-A
CONTRACT_GRANT: PHS-CA-12536
CONTRACT_GRANT: PHS-RL-00074-11
Distribution Limits
Public
Copyright
Other

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