Radiation chemical aspects of the origins of life

详细信息    查看全文

• 作者：Franco Cataldo ; Susana Iglesias-Groth
• 关键词：Origins of life ; Radiolysis ; Amino acids ; Nucleobases ; Radioracemization ; Tunneling
• 刊名：Journal of Radioanalytical and Nuclear Chemistry
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：311
• 期：2
• 页码：1081-1097
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
• 出版者：Springer Netherlands
• ISSN：1588-2780
• 卷排序：311

文摘

A review is presented on the abiotic synthesis of amino acids and purine and pyrimidine bases in processes involving the action of high energy radiation. It is shown that all the 20 proteinogenic amino acids and a selection of non-proteinogenic amino acids are able to “survive” to 14 MGy, equivalent to the calculated dose received by these molecules in 4.6 billions of years buried in comets and asteroids. Even the enantiomeric enrichment is preserved after 14 MGy. The review is closed with some considerations on the role which could be played by radiation-induced polymerization with enhancement of optical activity or occurring at very low temperatures with a tunneling mechanism, in the abiotic synthesis of information macromolecules.