Radiation-induced reactions of ketoacids in aqueous solutions and their possible role in chemical evolution
Por:
Ramirez-Vazquez, L., Aguilar-Ovando, E., Acosta-Fernandez, R., Ramos-Bernal, S., Negron-Mendoza, A.
Publicada:
1 ene 2019
Resumen:
Chemical evolution is the process through which simple compounds generate organic compounds essential for the development of life. The stability of organic compounds is an essential factor in the evaluation of plausible scenarios for the formation of organic molecules in the primitive Earth. In this context, we studied the steady-state ?-radiolysis of alpha-ketoacids (aKA) of prebiotic importance in aqueous solutions at high irradiation doses. These compounds participate in a variety of pathways in the metabolism of living organisms. The acids under study have the general formula R-(C=O)CO2H (R=CH3 pyruvic acid; R=CH2CO2H oxalacetic acid; R=CH2CH2CO2H a-ketoglutaric acid). We carried out the irradiation in a 60Co gamma source, with doses up to 300 kGy. For the analysis, we used various spectroscopic and chromatographic analytical methods. The gamma irradiation of a-ketoacids formed appreciable amounts the saturated carboxylic acid with one C-atom less compared to the target compound and the dimeric products. © 2019, Akadémiai Kiadó, Budapest, Hungary.
Filiaciones:
Ramirez-Vazquez, L.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Posgrado en Ciencias de la Tierra, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
Univ Nacl Autonoma Mexico, Posgrad Ciencias Tierra, Mexico City, DF, Mexico
Aguilar-Ovando, E.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
Acosta-Fernandez, R.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
Ramos-Bernal, S.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
Negron-Mendoza, A.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Cd. Universitaria, Ciudad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Mexico City, DF, Mexico
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