Results 21 to 30 of about 7,461,069 (375)
ACS Catalysis, 2021 Iron-based catalysts are considered active for the hydrogenation of CO2 toward high-order hydrocarbons.
Mauricio Lopez Luna +8 more
semanticscholar +1 more source
The Thermo‐Chemical Evolution of Mars With a Strongly Stratified Mantle
Journal of Geophysical Research: Planets, 2021 The Martian mantle probably experienced an early global magma ocean stage. The crystallization and the fractionation and overturn of such a magma ocean likely led to the formation of a compositionally distinct layer at the bottom of the mantle.
H. Samuel +5 more
semanticscholar +1 more source
Thioesters provide a plausible prebiotic path to proto-peptides
Nature Communications, 2022 One of the early processes enabling the origins of life is thought to be the condensation of building blocks into oligomers and polymers. In this article, the authors report the synthesis of thiodepsipeptides and HS-peptides under mild temperatures and ...
Moran Frenkel-Pinter +6 more
doaj +1 more source
Life, 2022 The origin of biopolymers is a central question in origins of life research. In extant life, proteins are coded linear polymers made of a fixed set of twenty alpha-L-amino acids.
Moran Frenkel-Pinter +6 more
doaj +1 more source
De re metallica: the cosmic chemical evolution of galaxies [PDF]
The Astronomy and Astrophysics Review, 2018 The evolution of the content of heavy elements in galaxies, the relative chemical abundances, their spatial distribution, and how these scale with various galactic properties, provide unique information on the galactic evolutionary processes across the ...
R. Maiolino, F. Mannucci
semanticscholar +1 more source
Galactic Chemical Evolution [PDF]
Publications of the Astronomical Society of Australia, 2003 AbstractThe primary present-day observables upon which theories of galaxy evolution are based are a system’s morphology, dynamics, colour, and chemistry. Individually, each provides an important constraint to any given model; in concert, the four represent a fundamental (intractable) boundary condition for chemodynamical simulations.
Fenner, Yeshe +4 more
openaire +5 more sources
Chemical evolution with rotating massive star yields II. A new assessment of the solar s- and r- process components [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The decomposition of the Solar system abundances of heavy isotopes into their s- and r- components plays a key role in our understanding of the corresponding nuclear processes and the physics and evolution of their astrophysical sites. We present a new
N. Prantzos +4 more
semanticscholar +1 more source
Mutually stabilizing interactions between proto-peptides and RNA
Nature Communications, 2020 Cooperative relationships are widespread among different classes of biopolymers and are predicted to have existed during emergence of life. This study shows that proto-peptides engage in mutually stabilizing interactions with RNA, providing support for ...
Moran Frenkel-Pinter +9 more
doaj +1 more source
The Fall of a Giant. Chemical evolution of Enceladus, alias the Gaia Sausage [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2019 In this Letter, we present the first chemical evolution model for Enceladus, alias the Gaia Sausage, to investigate the star formation history of one of the most massive satellites accreted by the Milky Way during a major merger event.
F. Vincenzo +6 more
semanticscholar +1 more source
The chemical evolution of the Milky Way [PDF]
Proceedings of Frontier Research in Astrophysics – II — PoS(FRAPWS2016), 2017 10 pages, 6 figures, in Frontier Research in Astrophysics - II 23-28 May 2016 Mondello (Palermo ...
Donatella Romano +3 more
openaire +6 more sources