Results 31 to 40 of about 7,461,069 (375)
Molecular Basis for Chemical Evolution of Flavones to Flavonols and Anthocyanins in Land Plants1
Plant Physiology, 2020 Functional flavone synthase Is in liverworts are evolutionarily linked to seed plant flavanone 3β-hydroxylases, and bifunctional enzymes likely represent a transition between the two enzymes.
Dan Li +9 more
semanticscholar +1 more source
The chemical evolution of IC 10 [PDF]
Astronomy and Astrophysics, 2010 Dwarf irregular galaxies are relatively simple unevolved objects where it is easy to test models of galactic chemical evolution. We attempt to determine the star formation and gas accretion history of IC10, a local dwarf irregular for which abundance, gas, and mass determinations are available. We apply detailed chemical evolution models to predict the
Laura Magrini +7 more
openaire +5 more sources
Chemical evolution with rotating massive star yields - I. The solar neighbourhood and the s-process elements [PDF]
, 2018 We present a comprehensive study of the abundance evolution of the elements from H to U in the Milky Way halo and local disk. We use a consistent chemical evolution model, metallicity dependent isotopic yields from low and intermediate mass stars and ...
N. Prantzos +5 more
semanticscholar +1 more source
Planet-forming material in a protoplanetary disc: the interplay between chemical evolution and pebble drift [PDF]
Monthly notices of the Royal Astronomical Society, 2019 The composition of gas and solids in protoplanetary discs sets the composition of planets that form out of them. Recent chemical models have shown that the composition of gas and dust in discs evolves on Myr time-scales, with volatile species ...
R. Booth, J. Ilee
semanticscholar +1 more source
Life, 2022 Researchers have suggested that the condensation of low-molecular-weight aldehydes under basic conditions (e.g., pH > 11) is the prebiotic reaction responsible for the abiotic formation of carbohydrates.
Claudio Alejandro Fuentes-Carreón +3 more
doaj +1 more source
The Chemical Evolution of Carbon, Nitrogen, and Oxygen in Metal-poor Dwarf Galaxies [PDF]
Astrophysical Journal, 2019 Ultraviolet nebular emission lines are important for understanding the time evolution and nucleosynthetic origins of their associated elements, but the underlying trends of their relative abundances are unclear.
D. Berg +4 more
semanticscholar +1 more source
Evolution Of Galaxies .2. Chemical Evolution Coefficients [PDF]
, 1973 NSF GP-18355, GP ...
Arnett, W. David, Talbot, Raymond. J.
core +1 more source
First results from the IllustrisTNG simulations: a tale of two elements - chemical evolution of magnesium and europium [PDF]
, 2017 The distribution of elements in galaxies provides a wealth of information about their production sites and their subsequent mixing into the interstellar medium. Here we investigate the distribution of elements within stars in the IllustrisTNG simulations.
J. Naiman +11 more
semanticscholar +1 more source
Biology Direct, 2012 Background Our current understanding of evolution is so tightly linked to template-dependent replication of DNA and RNA molecules that the old idea from Oparin of a self-reproducing 'garbage bag' ('coacervate') of chemicals that predated fully-fledged ...
Vasas Vera +4 more
doaj +1 more source
Galactic Chemical Evolution of Radioactive Isotopes [PDF]
Astrophysical Journal, 2019 The presence of short-lived (∼Myr) radioactive isotopes in meteoritic inclusions at the time of their formation represents a unique opportunity to study the circumstances that led to the formation of the solar system.
Benoit Côté +6 more
semanticscholar +1 more source