Abstract
The addition of Na and Ca chlorides to adenine (A), adenosine (Ado) and adenosine diphosphate solutions at pH 5.3 has been shown to result in intensification of EPR signals in samples irradiated by near UV at 77 K and appearance of signals of Cl2-* and peroxyl radicals. The peroxyl radicals contribution can exceed 30% of total amount of paramagnetic products. The addition of inorganic phosphate reduces the contribution of peroxyl radicals. Possible mechanisms of the processes involved are discussed.
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