Results 31 to 40 of about 20,271 (285)

Thresholds in Origin of Life Scenarios

iScience, 2020
Summary: Thresholds are widespread in origin of life scenarios, from the emergence of chirality, to the appearance of vesicles, of autocatalysis, all the way up to Darwinian evolution.
Cyrille Jeancolas, Christophe Malaterre, Philippe Nghe   +2 more
doaj   +1 more source

Prebiotic chemical origin of biomolecular complementarity

Communications Chemistry, 2023
The early Earth, devoid of the protective stratospheric ozone layer, must have sustained an ambient prebiotic physicochemical medium intensified by the co-existence of shortwave UV photons and very low energy electrons (vLEEs).
Y. Sajeev
doaj   +1 more source

Prebiotic Competition between Information Variants, With Low Error Catastrophe Risks

Entropy, 2015
During competition for resources in primitive networks increased fitness of an information variant does not necessarily equate with successful elimination of its competitors.
Radu Popa, Vily Marius Cimpoiasu
doaj   +1 more source

A study of prebiotic evolution

Complexity, 2003
AbstractA very simple model prebiotic system is explored, both, to elucidate the full complexity of its dynamic behavior, and from the standpoint of what a thermal analysis can tell us about evolution more generally. The system consists of a coacervate containing a four variable enzymatic oscillator that is driven by a single input concentration.
openaire   +1 more source

DNA Renaturation at the Water-Phenol Interface [PDF]

, 2003
We study DNA adsorption and renaturation in a water-phenol two-phase system, with or without shaking. In very dilute solutions, single-stranded DNA is adsorbed at the interface in a salt-dependent manner.
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core   +4 more sources

Lipid-Assisted Polymerization of Nucleotides

Life, 2019
In addition to being one of the proponents of the “Lipid World hypothesis”, David Deamer, together with other colleagues, pioneered studies involving formation of RNA-like oligomers from their ‘non-activated’, prebiotically ...
Felix Olasagasti, Sudha Rajamani
doaj   +1 more source

Remnants of an ancient metabolism without phosphate [PDF]

, 2017
Phosphate is essential for all living systems, serving as a building block of genetic and metabolic machinery. However, it is unclear how phosphate could have assumed these central roles on primordial Earth, given its poor geochemical accessibility.
Goldford, Joshua E., Hartman, Hyman, Segrè, Daniel, Smith, Temple F.   +3 more
core   +1 more source

The Potential of Seaweeds as a Source of Functional Ingredients of Prebiotic and Antioxidant Value [PDF]

, 2019
Two thirds of the world is covered by oceans, whose upper layer is inhabited by algae. This means that there is a large extension to obtain these photoautotrophic organisms.
Gomez Zavaglia, Andrea, Jiménez López, Cecilia, Mejuto, Juan Carlos, Prieto Lage, Miguel Ángel, Simal Gándara, Jesús   +4 more
core   +1 more source

Groundwater-Driven Evolution of Prebiotic Alkaline Lake Environments

Life
Alkaline lakes are thought to have facilitated prebiotic synthesis reactions on the early Earth because their modern analogs accumulate vital chemical feedstocks such as phosphate through the evaporation of dilute groundwaters.
Benjamin M. Tutolo, Robert Perrin, Rachel Lauer, Shane Bossaer, Nicholas J. Tosca, Alec Hutchings, Serhat Sevgen, Michael Nightingale, Daniel Ilg, Eric B. Mott, Thomas Wilson   +10 more
doaj   +1 more source

Organic Molecules in the Icy Bodies of Planetary Systems – Accepted Notions and New Ideas

Open Astronomy, 2018
Cometary bodies are acknowledged to contain some of the most pristine matter in the Solar System, including ices and minerals. Certain number of previously unidentified spectral emission features detected in comets can be explained as emission by ...
Simonia Irakli, Cruikshank Dale P.
doaj   +1 more source