对吸附于蒙脱石和凹凸棒石中的腺嘌呤和鸟嘌呤进行伽马射线辐照。
Gamma irradiation of adenine and guanine adsorbed into hectorite and attapulgite.
作者信息
Meléndez-López A, Cruz-Castañeda J, Negrón-Mendoza A, Ramos-Bernal S, Heredia A, Castro-Sanpedro L G, Aguilar-Flores D
机构信息
Instituto de Ciencias Nucleares, Circuito Exterior s/n, Ciudad Universitaria, Col. Universidad Nacional Autónoma de México, Deleg. Coyoacán, Apartado Postal 70-543, C.P. 04510, CDMX, Mexico.
Facultad de Estudios Superiores Zaragoza Campus 2. Batalla 5 de Mayo s/n, Ejército de Oriente Zona Peñón, Iztapalapa, 09230, CDMX, Mexico.
出版信息
Heliyon. 2023 May 6;9(5):e16071. doi: 10.1016/j.heliyon.2023.e16071. eCollection 2023 May.
This study focuses on the radiolysis (up to 36 kGy) of guanine and adenine (nitrogenous bases) adsorbed in hectorite and attapulgite to highlight the potential role of clays as protective agents against ionizing radiation in prebiotic processes. In this framework, the study investigated the nitrogenous bases' behavior in two types of systems: a) aqueous suspension of adenine-clay systems and b) guanine-clay systems in the solid state. This research utilized spectroscopic and chromatographic techniques for its analytical purposes. Regardless of the reaction medium conditions, the results reveal that nitrogenous bases are stable under ionizing irradiation when adsorbed on both clays.
本研究聚焦于吸附在锂蒙脱石和凹凸棒石中的鸟嘌呤和腺嘌呤（含氮碱基）的辐射分解（高达36千戈瑞），以突出粘土在生命起源前过程中作为抗电离辐射保护剂的潜在作用。在此框架下，该研究调查了含氮碱基在两种体系中的行为：a）腺嘌呤 - 粘土体系的水悬浮液和b）固态的鸟嘌呤 - 粘土体系。本研究利用光谱和色谱技术进行分析。无论反应介质条件如何，结果表明，当含氮碱基吸附在这两种粘土上时，它们在电离辐射下是稳定的。
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