In this work, the effect of γ-radiation on the decomposition of adenine dissolved in distilled water, saline solutions and artificial seawater was studied. As the composition of the major cations and anions of artificial seawater probably better resembles the composition of seawater on the Earth 4.0 billion years ago, this seawater was named artificial seawater 4.0 Ga. The main finding in this work is that artificial seawater 4.0 Ga demonstrated a better protective effect of adenine against γ-radiation. In addition, artificial seawater 4.0 Ga showed that adenine had no changes in pH after radiation exposure and the minor radiation-chemical yield G. The radiolysis of adenine promoted modifications in Fourier-transform infrared spectra. The deconvolution of some bands demonstrated the formation of a new frequency at 1713 cm−1. High performance liquid chromatography-mass detected a product of decomposition with 151 atomic units. Using the geometry optimization and simulated vibrational spectra it was possible to show that the main species formed are hydroxyl and oxide modified adenine. The data point to the formation of hydroxyl-adenine and adenine Nx-oxide. These products have biological relevance and could be available for chemical evolution.

中文翻译：

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γ-辐射对溶解在蒸馏水、盐溶液和人造海水中的腺嘌呤的影响，类似于 40 亿年前

在这项工作中，研究了 γ 辐射对溶解在蒸馏水、盐溶液和人造海水中的腺嘌呤分解的影响。由于人工海水的主要阳离子和阴离子的组成可能更接近于 40 亿年前地球上的海水组成，因此这种海水被命名为人工海水 4.0 Ga。这项工作的主要发现是人工海水 4.0 Ga 证明了腺嘌呤对γ射线的保护作用更好。此外，人工海水 4.0 Ga 表明，腺嘌呤在辐射暴露后的 pH 值没有变化，辐射化学产率较小。G. 腺嘌呤的辐解促进了傅里叶变换红外光谱的修改。一些波段的反卷积表明在 1713 cm处形成了一个新频率-1. 高效液相色谱-质谱检测到具有 151 个原子单位的分解产物。使用几何优化和模拟振动光谱可以表明形成的主要物质是羟基和氧化物修饰的腺嘌呤。数据表明羟基腺嘌呤和腺嘌呤 N 的形成X-氧化物。这些产品具有生物学相关性，可用于化学进化。