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- W79829189 abstract "The action of gamma rays on an aqueous solution of uridylic acid was studied at pH ~ 6 (10/sup -4/ M). Thin-layer silica gel chromatography and spectroscopic methods (such as mass spectrometry, NMR, IR) enabled the identification of eight substances; G values were calculated for the dose of 16 krads. There were trans (G == 0.05) and cis 5.6-dihydroxy-5,6-dihydro-uracil (G = 0.03), isodialuric acid (G = 0.01), 5-hydroxy-hydantoin (G = 0.01), alloxan (traces), parabanic acid (traces), N-formyl-N-glyoxyl urea (maybe in cyclic form N-1 formyl 5-hydroxy hydantoin) (traces) and uracil (G = 0.28). It appeared that the cleavage of the N-glycosidic linkage was an important reaction. The presence of indirectly detected ribonolactone phosphate was explained by the rupture of the C-N bond after the attack to carbon 1'. The heterocyclic pyrimidic moiety was the most sensitive part of the molecule to the action of the OH radicals. However the degradation of the ribosidic fragment accounted for the remaining 40% of the total effect. (auth)" @default.
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- W79829189 date "1974-02-01" @default.
- W79829189 modified "2023-10-18" @default.
- W79829189 title "Gamma irradiation of uridylic acid. Cleavage of the N-glycosidic linkage" @default.
- W79829189 hasPublicationYear "1974" @default.
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