Irradiation of Micro-organisms with Mono-energetic X-rays; Biological Consequences of the Auger Effect
- 1 January 1978
- journal article
- research article
- Published by Taylor & Francis in International Journal of Radiation Biology
- Vol. 34 (1) , 67-72
- https://doi.org/10.1080/09553007814550631
Abstract
The radiation resonance effect reported previously for isolated biomolecules has now for the first time been observed in a cellular system. Dried bacteria, Micrococcus denitrificans, in which TdR in DNA was partially substituted by BUdR, were subjected to mono-energetic X-rays of energies below or above the K-edge for Br. Subsequently, the colony-forming ability was assayed. For photon energy slightly above the K-edge, the lethality/rad was greater than that below the K-edge. This is interpreted in terms of the Auger effect initiated selectively by photo-absorption in constituent Br atoms. The differential absorption of low-energy photons in constituent atoms of DNA is also discussed.This publication has 10 references indexed in Scilit:
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