论文部分内容阅读
本工作研究了亚硫酸钠对甘氨酸以及其它主要产物形成的影响。结果表明氰酸盐和甲酰胺的生成与OH自由基有关,甘氨酸产额随Na_2SO_3浓度增加而增加,它的形成与还原性粒种有关。实验求得△G(甘氨酸)≈0.93。 动力学模拟计算结果证明了在含N_2体系中存在下列反应: HCN~- + CONH_2→HCONH_2 + CN~- H_2CN + CONH_2→2HCN + H_2O H_2CN+CONH_2→HCNO+H_2CNH同时也表明甘氨酸不仅可在刺迹中生成,而且也可由扩散的H_2CN(或HCN~-)重合产生。动力学计算还求得了k_(SO3)~(2-)+OH=(8.3±0.3)×10~9M~(-1)S~(-1)。 实验证明了丙氨酸为KCN水溶液γ辐解的产物,其产额几乎与清除剂存在无关,它可能由刺迹中的“热”H原子和水化电子形成。
This work examined the effect of sodium sulfite on the formation of glycine and other major products. The results showed that the formation of cyanate and formamide was related to OH radicals. The yield of glycine increased with the increase of Na_2SO_3 concentration, and its formation was related to reducing species. Experiment to obtain △ G (glycine) ≈ 0.93. The kinetic simulation results show that the following reactions exist in the N2 -containing system: HCN ~ - + CONH_2 → HCONH_2 + CN ~ - H_2CN + CONH_2 → 2HCN + H_2O H_2CN + CONH_2 → HCNO + H_2CNH. , But also by diffused H 2 CN (or HCN ~ -). Kinetic calculations also calculated the k_ (SO3) ~ (2 -) + OH = (8.3 ± 0.3) × 10 ~ 9M ~ (-1) S ~ (-1). Experiments show that alanine is a product of γ-irradiation by aqueous KCN solution. The yield of alanine is almost independent of the existence of a scavenger. It may be formed by “hot” H atoms and hydrated electrons in the streaks.