Microscopic dissipative structuring and proliferation at the origin of life
Por:
Michaelian, Karo
Publicada:
1 oct 2017
Categoría:
Multidisciplinary
Resumen:
Some fundamental molecules of life are suggested to have been formed,
proliferated, and evolved through photochemical microscopic dissipative
structuring and autocatalytic proliferation under the UV-C/UV-B solar
environment prevalent at Earth's surface throughout the Archean.
Evidence is given in the numerous salient characteristics of these,
including their strong absorption in this spectral region and their
rapid non-radiative excited state decay through inherent conical
intersections. The examples of the dissipative structuring and
dissipative proliferation of the purines and of single strand DNA are
given. UV-C and UV-B induced stationary state isomerizations and
tautomerizations are shown to be crucial to the formation of the purines
from hydrogen cyanide in an aqueous environment under UV-C light, while
UV-C induced phosphorylation of nucleosides and denaturing of double
helix RNA and DNA are similarly important to the production and
proliferation of single strand DNA. This thermodynamic dissipation
perspective provides a physical-chemical foundation for understanding
the origin and evolution of life.
Filiaciones:
Michaelian, Karo:
Department of Nuclear Physics and Application of Radiations, Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20–364, Cuidad de México, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Dept Nucl Phys & Applicat Radiat, Apartado Postal 20-364, Cuidad De Mexico, Mexico
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