Results 71 to 80 of about 7,604,095 (315)
A plausible pathway to prebiotic peptides via amino acid amides on the primordial Earth
Earth and Planetary PhysicsThe prebiotic synthesis of peptides prior to ribosome-catalyzed processes remains an enigma. The synthesis of abiotic peptides from amino acids (AAs) is primarily constrained by high activation energies and unfavorable thermodynamics, necessitating the ...
DingWei Gan +8 more
doaj +1 more source
Molecular Asymmetry in Prebiotic Chemistry: An Account from Meteorites
Life, 2016 Carbonaceous Chondrite (CC) meteorites are fragments of asteroids, solar planetesimals that never became large enough to separate matter by their density, like terrestrial planets.
Sandra Pizzarello
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Thermodynamics of Potential CHO Metabolites in a Reducing Environment
Life, 2021 How did metabolism arise and evolve? What chemical compounds might be suitable to support and sustain a proto-metabolism before the advent of more complex co-factors? We explore these questions by using first-principles quantum chemistry to calculate the
Jeremy Kua +2 more
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GALACTIC CHEMICAL EVOLUTION: THE IMPACT OF THE 13C-POCKET STRUCTURE ON THE s-PROCESS DISTRIBUTION [PDF]
, 2017 The solar s-process abundances have been analyzed in the framework of a Galactic Chemical Evolution (GCE) model. The aim of this work is to implement the study by Bisterzo et al., who investigated the effect of one of the major uncertainties of ...
S. Bisterzo +4 more
semanticscholar +1 more source
Nature Communications, 2021 Construction of Z-scheme heterostructure is of great significance for realizing efficient photocatalytic water splitting. However, the conscious modulation of Z-scheme charge transfer is still a great challenge. Herein, interfacial Mo-S bond and internal
Xuehua Wang +5 more
semanticscholar +1 more source
FEBS Letters, EarlyView.B cells sense external mechanical forces and convert them into biochemical signals through mechanotransduction. Understanding how malignant B cells respond to physical stimuli represents a groundbreaking area of research. This review examines the key mechano‐related molecules and pathways in B lymphocytes, highlights the most relevant techniques to ...
Marta Sampietro +2 more
wiley +1 more source
The Mystery of Homochirality on Earth
LifeHomochirality is an obvious feature of life on Earth. On the other hand, extraterrestrial samples contain largely racemic compounds. The same is true for any common organic synthesis.
Michael G. Weller
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The AMBRE project: chemical evolution models for the Milky Way thick and thin discs [PDF]
, 2017 We study the chemical evolution of the thick and thin discs of the Galaxy by comparing detailed chemical evolution models with recent data from the AMBRE Project.
V. Grisoni +9 more
semanticscholar +1 more source
Evolutionary interplay between viruses and R‐loops
FEBS Letters, EarlyView.Viruses interact with specialized nucleic acid structures called R‐loops to influence host transcription, epigenetic states, latency, and immune evasion. This Perspective examines the roles of R‐loops in viral replication, integration, and silencing, and how viruses co‐opt or avoid these structures.
Zsolt Karányi +4 more
wiley +1 more source
Life, 2022 The origin of life on Earth required myriads of chemical and physical processes. These include the formation of the planet and its geological structures, the formation of the first primitive chemicals, reaction, and assembly of these primitive chemicals ...
Arpita Saha +4 more
doaj +1 more source