Unpaired electron species in calf thymus DNA thin films induced by nitrogen and oxygen K-shell photoabsorption
Unpaired electron species in calf thymus DNA thin films induced by nitrogen and oxygen K-shell photoabsorption
复制标题
氮和氧 K 壳层光吸收诱导的小牛胸腺 DNA 薄膜中不成对的电子物种
DOI：
10.1103/physrevlett.109.213001
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Oka;T.
The mechanism of DNA modification induced by-shell photoabsorption of nitrogen and oxygen atoms was investigated by electron paramagnetic resonance and x-ray absorption near edge structure measurements of calf thymus DNA. Afactor of 2.000 for the unpaired electron species, which only arises during irradiation, was measured. The EPR intensities for DNA zwere twofold times larger than those estimated based on the photoabsorption cross section. This suggests that the DNA film itself forms unpaired electron species through the excitation of enhanced electron recapturing, known as the postcollision interaction process.
