Results 41 to 50 of about 2,118 (196)

Towards an evolutionary theory of the origin of life based on kinetics and thermodynamics [PDF]

open access: yesOpen Biology, 2013
A sudden transition in a system from an inanimate state to the living state—defined on the basis of present day living organisms—would constitute a highly unlikely event hardly predictable from physical laws.
Robert Pascal   +2 more
doaj   +1 more source

Abiogenesis not required to explain the origin of volcanic-hydrothermal hydrocarbons [PDF]

open access: diamondGeochemical Perspectives Letters, 2019
Abiotic formation of n-alkane hydrocarbons has been postulated to occur within Earth's crust. Apparent evidence was primarily based on uncommon carbon and hydrogen isotope distribution patterns that set methane and its higher chain homologues apart from biotic isotopic compositions associated with microbial production and closed system thermal ...
Jens Fiebig   +9 more
openalex   +6 more sources

Did Homocysteine Take Part in the Start of the Synthesis of Peptides on the Early Earth?

open access: yesBiomolecules, 2022
Unlike its shorter analog, cysteine, and its methylated derivative, methionine, homocysteine is not today a proteinogenic amino acid. However, this thiol containing amino acid is capable of forming an activated species intramolecularly.
Sparta Youssef-Saliba   +2 more
doaj   +1 more source

Simplicity out of complexity? On physical eschatology and abiogenesis

open access: goldTheoria, Beograd, 2021
Standard reductionist narrative about the necessity of complex systems arising from simple subsystems can be undermined from multiple directions. Here, I shall suggest an unexpected way of such undermining which occurs upon joining our best understanding of the future evolution of the universe (as outlined by physical eschatology) with the ...
Milan M. Ćirković
openalex   +3 more sources

The origin of life: what we know, what we can know and what we will never know [PDF]

open access: yesOpen Biology, 2013
The origin of life (OOL) problem remains one of the more challenging scientific questions of all time. In this essay, we propose that following recent experimental and theoretical advances in systems chemistry, the underlying principle governing the ...
Addy Pross, Robert Pascal
doaj   +1 more source

Biblical Perspectives as a Guide to Research on Life’s Origin and History

open access: yesReligions, 2023
The more than thirty spacetime theorems developed over the past five decades establish that the universe and its spacetime dimensions have emerged from a cause/causal agent beyond the cosmos.
Hugh Norman Ross
doaj   +1 more source

Straightforward Creation of Possibly Prebiotic Complex Mixtures of Thiol-Rich Peptides

open access: yesLife, 2023
At the origin of life, extremely diverse mixtures of oligomers and polymers could be obtained from relatively simple molecular bricks. Here, we present an example of the polymerization of two amidonitriles derived from cysteine, Cys-Ala-CN and Cys-Met-CN.
Ibrahim Shalayel   +3 more
doaj   +1 more source

The Future of Origin of Life Research: Bridging Decades-Old Divisions

open access: yesLife, 2020
Research on the origin of life is highly heterogeneous. After a peculiar historical development, it still includes strongly opposed views which potentially hinder progress.
Martina Preiner   +24 more
doaj   +1 more source

Geochemical and Photochemical Constraints on S[IV] Concentrations in Natural Waters on Prebiotic Earth

open access: yesAGU Advances, Volume 4, Issue 6, December 2023., 2023
Abstract Aqueous S[IV] species (HSO3− ${\mathrm{H}\mathrm{S}\mathrm{O}}_{3}^{-}$, SO32− ${\mathrm{S}\mathrm{O}}_{3}^{2-}$) derived from volcanogenic atmospheric SO2 are important to planetary habitability through their roles in proposed origins‐of‐life chemistry and influence on atmospheric sulfur haze formation, but the early cycling of S[IV] is ...
Sukrit Ranjan   +8 more
wiley   +1 more source

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