Results 301 to 310 of about 924,617 (340)
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Mechanistic possibilities in prebiotic thiophosphate chemistry
Journal of Molecular Evolution, 1978Two types of reactivities of thiophosphates have been demonstrated: one being nucleophilic displacement by the P-S moiety of nucleoside phosphorothioates and the other, phosphorylation via P-S cleavage as the driving force. We have designed a system where both displacement on carbon and P-S cleavage are possible.
Joseph Nagyvary, Istvan Kapovits
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Rooting Prebiotic Chirality in Spinomeric Chemistry?
Astrobiology, 2009Spinomeric chemistry is a domain of physical chemistry that explores the role of spin-isomery in chemical reactivity. In large magnetic fields (B), chemical structures with three adjacent nuclear spins (such as H(2)(17)O, H(2)(33)S,-NH(2), and and -(13)CH(2)-) form complex spinomers.
Vily Marius Cimpoiaşu +2 more
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Life's Biological Chemistry: A Destiny or Destination Starting from Prebiotic Chemistry?
Chemistry, 2018Research into understanding the origins-and evolution-of life has long been dominated by the concept of taking clues from extant biology and extrapolating its molecules and pathways backwards in time.
R. Krishnamurthy
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Recent progress in the prebiotic chemistry of HCN
Origins of Life, 1984This article reports some recent results on the mechanisms of synthesis of biologically important molecules in oligomerizing solutions of HCN. It will also attempt to summarize, as completely as possible, our present state of knowledge concerning the range of products obtained under a variety of conditions in this reaction system.
Alan W. Schwartz +2 more
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Prebiotic Chemistry of HCN Tetramerization by Automated Reaction Search.
Chemistry, 2018HCN oligomerization is considered to be one of the important pathways in chemical evolution. Nucleobases, aminoacids, and many other complex organic molecules can evolve through this pathway.
Surajit Nandi +2 more
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Diverse geochemical conditions for prebiotic chemistry in shallow-sea alkaline hydrothermal vents
Nature Geoscience, 2022L. Barge, R. Price
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Silica Metal Oxide Vesicles Catalyze Comprehensive Prebiotic Chemistry.
Chemistry, 2018It has recently been demonstrated that mineral self-assembled structures catalyzing prebiotic chemical reactions may form in natural waters derived from serpentinization, a geological process widespread in the early stages of Earth-like planets.
Bruno Mattia Bizzarri +5 more
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Formamide-based prebiotic chemistry in the Phlegrean Fields
Advances in Space Research, 2018Understanding the formation of biogenic molecules in abiotic conditions is a prerequisite in the origin-of-life studies. Determining the conditions allowing an efficient one-pot synthesis of the largest possible panel of biogenic compounds may shed light on the plausible scenario in which the processes that kick-started life might have occurred.
Rosario Avino +12 more
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Physical non-equilibria for prebiotic nucleic acid chemistry
Nature Reviews Physics, 2023A. Ianeselli +6 more
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The cometary connection with prebiotic chemistry
Origins of Life, 1984Amino-acids, purines and pyrimidines may have been formed in space and brought down to Earth by comets during the final stage of the Earth's cold accretion from dust. Present-day comets seem to be the remnants of the building blocks of the early solar system, put for 4.6 billion years in “parking orbits” in the deep cold of space by the same process of
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