Results 51 to 60 of about 22,026 (283)
AGU Advances, 2023 Aqueous S[IV] species (HSO3−, SO32−) 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 ...
Sukrit Ranjan +8 more
doaj +1 more source
Prebiotic Reaction Networks in Water
Life, 2020 A prevailing strategy in origins of life studies is to explore how chemistry constrained by hypothetical prebiotic conditions could have led to molecules and system level processes proposed to be important for life’s beginnings. This strategy has yielded
Quoc Phuong Tran +2 more
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A Chemist’s Perspective on the Role of Phosphorus at the Origins of Life
Life, 2017 The central role that phosphates play in biological systems, suggests they also played an important role in the emergence of life on Earth. In recent years, numerous important advances have been made towards understanding the influence that phosphates ...
Christian Fernández-García +2 more
doaj +1 more source
Potential Role of Inorganic Confined Environments in Prebiotic Phosphorylation
Life, 2018 A concise outlook on the potential role of confinement in phosphorylation and phosphate condensation pertaining to prebiotic chemistry is presented. Inorganic confinement is a relatively uncharted domain in studies concerning prebiotic chemistry, and ...
Avinash Vicholous Dass +6 more
doaj +1 more source
Radicals in prebiotic chemistry
Pure and Applied Chemistry, 2020 Abstract Radical chemistry is tightly interwoven in proposed prebiotic synthetic pathways, reaction networks and geochemical scenarios that have helped shape our understanding of how life could have originated. Gas-phase prebiotic reactions involving electric discharge, vapour ablation by asteroidal and cometary impacts as well as ...
Renee W. J. Lim, Albert C. Fahrenbach
openaire +2 more sources
Scum of the Earth: A Hypothesis for Prebiotic Multi-Compartmentalised Environments
Life, 2021 Compartmentalisation by bioenergetic membranes is a universal feature of life. The eventual compartmentalisation of prebiotic systems is therefore often argued to comprise a key step during the origin of life.
Craig Robert Walton, Oliver Shorttle
doaj +1 more source
The Surface UV Environment on Planets Orbiting M-Dwarfs: Implications for Prebiotic Chemistry & Need for Experimental Follow-Up [PDF]
Ranjan, S., Wordsworth, R., & Sasselov, D. D., 2017, ApJ, 843, 11, 2017 Potentially-habitable planets orbiting M-dwarfs are of intense astrobiological interest because they are the only rocky worlds accessible to biosignature search over the next 10+ years due to a confluence of observational effects. Simultaneously, recent experimental and theoretical work suggests that UV light may have played a key role in the origin of
arxiv +1 more source
The emergence of interstellar molecular complexity explained by interacting networks [PDF]
PNAS 119 (30) e2119734119 (2022), 2022 Recent years have witnessed the detection of an increasing number of complex organic molecules in interstellar space, some of them being of prebiotic interest. Disentangling the origin of interstellar prebiotic chemistry and its connection to biochemistry and ultimately to biology is an enormously challenging scientific goal where the application of ...
arxiv +1 more source
Quenching to fix metastable states in models of prebiotic chemistry [PDF]
Phys. Rev. E 102, 062412 (2020), 2020 For prebiotic chemistry to succeed in producing a starting metastable, autocatalytic and reproducing system subject to evolutionary selection it must satisfy at least two apparently contradictory requirements: Because such systems are rare, a search among vast numbers of molecular combinations must take place naturally, requiring rapid rearrangement ...
arxiv +1 more source
The Origin of RNA Precursors on Exoplanets [PDF]
Science Advances 01 Aug 2018: Vol. 4, no. 8, eaar3302, 2018 Given that the macromolecular building blocks of life were likely produced photochemically in the presence of ultraviolet (UV) light, we identify some general constraints on which stars produce sufficient UV for this photochemistry. We estimate how much light is needed for the UV photochemistry by experimentally measuring the rate constant for the UV ...
arxiv +1 more source