Results 21 to 30 of about 2,618 (222)

THE OCTOMORPHIC ORIGIN OF LIFE ABIOGENESIS

open access: green
This paper presents a geometric mechanism for the origin of life based on the Octomorphic Framework. Instead of treating life as a chemical accident, the model shows how specific coherence structures emerge naturally from the geometry of matter. Using three core quantities — triangle-braidness (TB), phase strain (Delta L), and mean coherence curvature (
Simpson, Brian
openalex   +2 more sources

Exploring the space of self-reproducing ribozymes using generative models [PDF]

open access: yesNature Communications
Estimating the plausibility of RNA self-reproduction is central to origin-of-life scenarios. However, this property has been shown in only a handful of catalytic RNAs.
Camille N. Lambert   +8 more
doaj   +2 more sources

Photochemical synthesis of natural lipids in artificial and living cells [PDF]

open access: yesNature Communications
Lipid synthesis plays a central role in cell structure, signaling, and metabolism. A general method for the abiogenesis of natural lipids could transform the development of lifelike artificial cells and unlock new ways to explore lipid functions in ...
Peng Ji   +6 more
doaj   +2 more sources

Potassium at the Origins of Life: Did Biology Emerge from Biotite in Micaceous Clay?

open access: yesLife, 2022
Intracellular potassium concentrations, [K+], are high in all types of living cells, but the origins of this K+ are unknown. The simplest hypothesis is that life emerged in an environment that was high in K+.
Helen Greenwood Hansma
doaj   +1 more source

Xeno Amino Acids: A Look into Biochemistry as We Do Not Know It

open access: yesLife, 2023
Would another origin of life resemble Earth’s biochemical use of amino acids? Here, we review current knowledge at three levels: (1) Could other classes of chemical structure serve as building blocks for biopolymer structure and catalysis?
Sean M. Brown   +2 more
doaj   +1 more source

The “Odd Inches”: Moby-Dick’s Fossil Record and Melville’s Admeasured Time

open access: yesMiranda: Revue Pluridisciplinaire du Monde Anglophone, 2022
This paper considers the measurements of fossils and markers of geologic time as they appear throughout Moby-Dick, complicating histories of bodies and their remainders. Looking for instances where Ishmael’s measurements fall short or fail to include the
Ryan Heryford
doaj   +1 more source

Towards an evolutionary theory of the origin of life based on kinetics and thermodynamics [PDF]

open access: yesOpen Biology, 2013
A sudden transition in a system from an inanimate state to the living state—defined on the basis of present day living organisms—would constitute a highly unlikely event hardly predictable from physical laws.
Robert Pascal   +2 more
doaj   +1 more source

The Future of Origin of Life Research: Bridging Decades-Old Divisions

open access: yesLife, 2020
Research on the origin of life is highly heterogeneous. After a peculiar historical development, it still includes strongly opposed views which potentially hinder progress.
Martina Preiner   +24 more
doaj   +1 more source

Did Homocysteine Take Part in the Start of the Synthesis of Peptides on the Early Earth?

open access: yesBiomolecules, 2022
Unlike its shorter analog, cysteine, and its methylated derivative, methionine, homocysteine is not today a proteinogenic amino acid. However, this thiol containing amino acid is capable of forming an activated species intramolecularly.
Sparta Youssef-Saliba   +2 more
doaj   +1 more source

Synthesis and Characterization of Amino Acid Decyl Esters as Early Membranes for the Origins of Life

open access: yesMembranes, 2022
Understanding how membrane forming amphiphiles are synthesized and aggregate in prebiotic settings is required for understanding the origins of life on Earth 4 billion years ago.
Isabella Lago   +3 more
doaj   +1 more source

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