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Paleo–Mesoarchean sedimentary record in the Dharwar Craton, India: Implications for Archean ocean oxygenation

Autor: Harshitha, G., Manikyamba, C., Santosh, M., Yang, Cheng-Xue, Keshav Krishna, A., Sesha Sai, V.V., Panduranga Reddy, I.

Publikováno v: In Geoscience Frontiers January 2024 15(1)

An irreversible thermodynamic model of pre-biological small circular molecular dissipative structures inside vacuoles on the Archean Ocean surface.

Autor: Montemayor-Aldrete JA; Departamento de Estado Sólido, Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Ciudad de México, 04510, México. Electronic address: jamonal@fisica.unam.mx., Nieto-Villar JM; Department of Chemical-Physics, A. Alzola Group of Thermodynamics of Complex Systems of M.V. Lomonosov Chair, Faculty of Chemistry, University of Havana, Cuba., Villagómez CJ; Departamento de Estado Sólido, Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Ciudad de México, 04510, México., Márquez-Caballé RF; Departamento de Estado Sólido, Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, Ciudad Universitaria, Ciudad de México, 04510, México.

Publikováno v: Bio Systems [Biosystems] 2024 Dec 20, pp. 105379. Date of Electronic Publication: 2024 Dec 20.

Comments on 'was hydrogen peroxide present before the arrival of oxygenic photosynthesis? The important role of iron(II) in the archean ocean'

Autor: Xiao Wu, Jianxi Zhu, Hongping He, Kurt O. Konhauser, Yiliang Li

Publikováno v: Redox Biology, Vol 71, Iss , Pp 103111- (2024)

Recent research has hypothesized that hydrogen peroxide (H2O2) may have emerged from abiotic geochemical processes during the Archean eon (4.0–2.5 Ga), stimulating the evolution of an enzymatic antioxidant system in early life. This eventually led

Externí odkaz: https://doaj.org/article/36db94fb6eb4474c9b40d06bd685a0c3

Was hydrogen peroxide present before the arrival of oxygenic photosynthesis? The important role of iron(II) in the Archean ocean

Autor: Willem H. Koppenol, Helmut Sies

Publikováno v: Redox Biology, Vol 69, Iss , Pp 103012- (2024)

We address the chemical/biological history of H2O2 back at the times of the Archean eon (2.5–3.9 billion years ago (Gya)). During the Archean eon the pO2 was million-fold lower than the present pO2, starting to increase gradually from 2.3 until 0.6

Externí odkaz: https://doaj.org/article/ef756404527046cab33e0d8747a2b5e0