Results 71 to 80 of about 10,842 (176)
Molecules, 2020 The gas-phase formation and spectroscopic characteristics of ethanimine have been re-investigated as a paradigmatic case illustrating the accuracy of state-of-the-art quantum-chemical (QC) methodologies in the field of astrochemistry.
Carmen Baiano +4 more
doaj +1 more source
Frontiers in Astronomy and Space SciencesThe origins of life are a fascinating topic and a captivating scientific challenge that involve numerous hypotheses. Computational quantum techniques have been growing, modernizing, and complementing experimental efforts in the field. In this mini review,
Ana Luiza Quilici +3 more
doaj +1 more source
Selective Nucleobase Pairing Extends Plausibly Prebiotic Conditions to the Solid State [PDF]
, 2019 Despite its immense relevance in the context of the emergence of life, the pairing of nucleobases has only been observed for regioselectively methylated adenine and thymine.
Tomislav, Stolar +6 more
core +1 more source
Radiation-driven Prebiotic Chemistry and Biosignatures Detection [PDF]
International audienceEarth's prebiotic chemistry is based on water and thermal sources (internal or external to the Earth)1,2. In contrast, the prebiotic chemistry of extraterrestrial systems (Mars, Europa, Titan, Enceladus, etc.) is primarily driven by
Trainer, Melissa +7 more
core +1 more source
Non-canonical nucleosides and chemistry of the emergence of life
Nature Communications, 2018 Prebiotic chemistry, driven by changing environmental parameters provides canonical and a multitude of non-canonical nucleosides. This suggests that Watson-Crick base pairs were selected from a diverse pool of nucleosides in a pre-Darwinian chemical ...
Sidney Becker +3 more
doaj +1 more source
Prebiotic thiol-catalyzed thioamide bond formation
Geochemical TransactionsThioamide bonds are important intermediates in prebiotic chemistry. In cyanosulfidic prebiotic chemistry, they serve as crucial intermediates in the pathways that lead to the formation of many important biomolecules (e.g., amino acids).
Andrew S. Hyde, Christopher H. House
doaj +1 more source
Atmospheric Prebiotic Chemistry and Organic Hazes [PDF]
Current Organic Chemistry, 2013 Earth's atmospheric composition at the time of the origin of life is not known, but it has often been suggested that chemical transformation of reactive species in the atmosphere was a significant source of prebiotic organic molecules. Experimental and theoretical studies over the past half century have shown that atmospheric synthesis can yield ...
openaire +2 more sources
Sulfur Amino Acids: From Prebiotic Chemistry to Biology and Vice Versa [PDF]
, 2021 International audienceTwo sulfur-containing amino acids are included in the list of the 20 classical protein amino acids. A methionine residue is introduced at the start of the synthesis of all current proteins.
Youssef-Saliba, Sparta, Vallée, Yannick
core
Mimicking the surface and prebiotic chemistry of early Earth using flow chemistry
Nature Communications, 2018 There is still much debate on early Earth geochemical conditions affecting the chemistry of simple synthons that originated life. Here, the authors report an uninterrupted multistep synthetic route to 2-aminooxazole by means of flow chemistry equipment ...
Dougal J. Ritson +3 more
doaj +1 more source
Control of self-assembly pathways toward conglomerate and racemic supramolecular polymers
Nature Communications, 2020 Homo- and heterochiral aggregation is a process of interest to prebiotic and chiral separation chemistry. Here, the authors analyze the self-assembly of a racemic mixture into 1D supramolecular polymers and find homochiral aggregation into conglomerates ...
Marius Wehner +3 more
doaj +1 more source