Abstract

Ion beam irradiation-induced inorganic phosphate (Pi) release from 5′-CMP nucleotide could be divided into two parts: fast process and slow process. The yield of Pi released from the fast process not only had a non-linear response to irradiation dose, but was also influenced by post-irradiation treatments. It was found that heat treatment and alkali treatment increased the yield of Pi but acid treatment decreased it. With the heat treatment lower than 80°C, the Pi release process followed the first order reaction model, but under the conditions of 95°C treatment and alkali treatment the Pi release process followed the second order reaction model. Moreover, the kinetics equations and the rate constants of different models of the Pi release reactions were deduced.

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