Irradiation of micro-organisms with mono-energetic X-rays; biological consequences of the Auger effect.
Irradiation of micro-organisms with mono-energetic X-rays; biological consequences of the Auger effect.
复制标题
用单能 X 射线照射微生物；
DOI：
--
复制
发表时间：
1978
期刊：
影响因子：
--
通讯作者：
B. Mütze
中科院分区：
文献类型：
--
作者：
A. Halpern;B. Mütze
先前报道的孤立的生物分子的辐射共振效应，现在已首次在细胞系统中观察到。干燥的细菌，微球菌，其中DNA中的TdR被BUdR部分取代，进行单能X射线的能量低于或高于Br的K-边。随后，测定集落形成能力。对于略高于K边缘的光子能量，致死率/rad大于低于K边缘的致死率/rad。这是解释的俄歇效应的光吸收成分Br原子选择性地启动。本文还讨论了低能光子在DNA组成原子中的差分吸收。
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.