Results 131 to 140 of about 22,026 (283)

Influence of Fe, Ni, and Cu Doping on the Photocatalytic Efficiency of ZnS: Implications for Prebiotic Chemistry [PDF]

arXiv, 2016
The mineral sphalerite (ZnS) is a typical constituent at the periphery of submarine hydrothermal deposits on Earth. It has been frequently suggested to have played an important role in the prebiotic chemistry due to its prominent photocatalytic activity. Nevertheless, the need for {\lambda} < 344 nm UV radiation, which accounts for a very minor part of
arxiv  

Light‐responsive mononucleotide coacervates

Chemistry – A European Journal, Accepted Article.
Liquid‐liquid phase separation (LLPS) is central to the formation of biomolecular condensates in modern cells and is also explored as a mechanism for assembling protocells. Phase‐separated droplets provide dynamic micro‐environments that concentrate reactants, enhance reactions, and allow molecular exchange, essential for both cellular regulation and ...
Edison Rafael Jimenez Granda, Hedi Karoui, Xavier Brilland, Jean-Christophe Baret, Nicolas Martin   +4 more
wiley   +1 more source

The Photophysics of Nucleic Acids: Consequences for the Emergence of Life

ChemSystemsChem, Volume 5, Issue 1, January 2023., 2023
Photochemical reactions in nucleic acids induced by ultraviolet (UV) radiation could have played an important role in the prebiotic selection of the building blocks of life. This Review summarizes the quantum efficiencies of the photorelaxation pathways of nucleic acids and discusses its implications for the emergence of an initial sequence pool on ...
Corinna L. Kufner, Dominik B. Bucher, Dimitar D. Sasselov   +2 more
wiley   +1 more source

Origin of life's building blocks in Carbon and Nitrogen rich surface hydrothermal vents [PDF]

arXiv, 2019
There are two dominant and contrasting classes of origin of life scenarios: those predicting that life emerged in submarine hydrothermal systems, where chemical disequilibrium can provide an energy source for nascent life; and those predicting that life emerged within subaerial environments, where UV catalysis of reactions may occur to form the ...
arxiv  

Spontaneous Mirror Symmetry Breaking in the Limited Enantioselective Autocatalysis Model: Abyssal Hydrothermal Vents as Scenario for the Emergence of Chirality in Prebiotic Chemistry [PDF]

, 2013
Josep M. Ribó, Joaquim Crusats, Zoubir El‐Hachemi, Albert Moyano, Celia Blanco, David Hochberg   +5 more
openalex   +1 more source

RNA Oligomerisation without Added Catalyst from 2′,3′‐Cyclic Nucleotides by Drying at Air‐Water Interfaces**

ChemSystemsChem, Volume 5, Issue 1, January 2023., 2023
Without catalyst! A non‐enzymatic, spontaneous route to the formation of short, mixed‐sequence RNA strands from 2′,3′‐cyclic ribonucleotides is shown. The reaction occurs by drying at the air–water interfaces. Abstract For the emergence of life, the abiotic synthesis of RNA from its monomers is a central step.
Avinash Vicholous Dass, Sreekar Wunnava, Juliette Langlais, Beatriz von der Esch, Maik Krusche, Lennard Ufer, Nico Chrisam, Romeo C. A. Dubini, Florian Gartner, Severin Angerpointner, Christina F. Dirscherl, Petra Rovó, Christof B. Mast, Judit E. Šponer, Christian Ochsenfeld, Erwin Frey, Dieter Braun   +16 more
wiley   +1 more source

Grape Stalks Valorization towards Circular Economy: A Cascade Biorefinery Strategy

ChemSusChem, EarlyView.
A cascade protocol for grape stalks valorization has been proposed, characterized by a multidisciplinary strategy using unconventional techniques and subcritical water as a green solvent, where physical/chemical treatments synergistically interact with biological treatments to obtain added value products from all the biomass components.
Carlotta Valle, Giorgio Grillo, Emanuela Calcio Gaudino, Paola Ponsetto, Roberto Mazzoli, Giulia Bonavita, Pietro Vitale, Enrica Pessione, Emilia Garcia‐Moruno, Antonella Costantini, Giancarlo Cravotto, Silvia Tabasso   +11 more
wiley   +1 more source

Framing major prebiotic transitions as stages of protocell development: three challenges for origins-of-life research

Beilstein Journal of Organic Chemistry, 2017
Conceiving the process of biogenesis as the evolutionary development of highly dynamic and integrated protocell populations provides the most appropriate framework to address the difficult problem of how prebiotic chemistry bridged the gap to full ...
Ben Shirt-Ediss, Sara Murillo-Sánchez, Kepa Ruiz-Mirazo   +2 more
doaj   +1 more source

Chemistry in the Galactic Center [PDF]

arXiv
Gas and dust in the Galactic Center are subjected to energetic processing by intense UV radiation fields, widespread shocks, enhanced rates of cosmic-rays and X-rays, and strong magnetic fields. The Giant Molecular Clouds in the Galactic Center present a rich chemistry in a wide variety of chemical compounds, some of which are prebiotic.
arxiv  

The plausibility of origins scenarios requiring two impactors [PDF]

Hydrogen cyanide delivered by cometary impactors can be concentrated as ferrocyanide salts, which may support the initial stages of prebiotic chemistry on the early Earth. One way to achieve the conditions required for a variety of prebiotic scenarios, requiring for example the formation of cyanamide and cyanoacetylene, is through the arrival of a ...
arxiv   +1 more source