Results 1 to 10 of about 7,461,069 (375)

Cosmic Chemical Evolution [PDF]

The Astrophysical Journal, 1999
Numerical simulations of standard cosmological scenarios have now reached the degree of sophistication required to provide tentative answers to the fundamental question: Where and when were the heavy elements formed? Averaging globally, these simulations
Renyue Cen, Jeremiah P. Ostriker
core   +7 more sources

Chemical Evolution of Natural Product Structure. [PDF]

J Am Chem Soc, 2022
Natural products are the result of Nature’s exploration of biologically relevant chemical space through evolution and an invaluable source of bioactive small molecules for chemical biology and medicinal chemistry.
Grigalunas M, Brakmann S, Waldmann H.
europepmc   +2 more sources

Pseudo Natural Products-Chemical Evolution of Natural Product Structure. [PDF]

Angew Chem Int Ed Engl, 2021
Pseudo‐natural products (PNPs) combine natural product (NP) fragments in novel arrangements not accessible by current biosynthesis pathways. As such they can be regarded as non‐biogenic fusions of NP‐derived fragments.
Karageorgis G, Foley DJ, Laraia L, Brakmann S, Waldmann H.   +4 more
europepmc   +2 more sources

Chemical Evolution of Galaxies [PDF]

Publications of the Astronomical Society of the Pacific, 2000
Chemical evolution of galaxies brings together ideas on stellar evolution and nucleosynthesis with theories of galaxy formation, star formation and galaxy evolution, with all their associated uncertainties.
Arimoto N., Arnaud M., B. E. J. Pagel, Beers T. C., Edvardsson B., Fuhrmann K., Gasson R. E. M., Gratton R., Gustafsson B., Hoyle F., Larson R. B., Madau P., Maeder A., Marigo P., Matteucci F., Nissen P. E., Pagel B. E. J., Pagel B. E. J., Renzini A., Scalo J., Thielemann F.-K., White S. D. M.   +21 more
core   +8 more sources

Chemical Evolution in VeLLOs [PDF]

Journal of The Korean Astronomical Society, 2007
A new type of object called "Very Low Luminosity Objects (VeLLOs)" has been discovered by the Spitzer Space Telescope. VeLLOs might be substellar objects forming by accretion.
Lee, Jeong-Eun
core   +5 more sources

Modelling the chemical evolution [PDF]

Proceedings of the International Astronomical Union, 2010
Advanced observational facilities allow to trace back the chemical evolution of the Universe, on the one hand, from local objects of different ages and, secondly, by direct observations of redshifted objects.
Argast, Cescutti, Chiappini, Colavitti, Gerhard Hensler, Harfst, Hensler, Hensler, Hensler, Hensler, Hirschi, Ikuta, Koch, Koeppen, Koeppen, Kroeger, Maciel, Maeder, Matteucci, Meynet, Meynet, Meynet, Momany, Nordstroem, Pagel, Pagel, Portinari, Portinari, Prantzos, Prantzos, Recchi, Recchi, Recchi, Recchi, Revaz, Samland, Schaller, Simone Recchi, Spitoni, Theis, Tinsley   +40 more
core   +5 more sources

The Chemical Evolution of Phosphorus [PDF]

The Astrophysical Journal, 2014
Phosphorus is one of the few remaining light elements for which little is known about its nucleosynthetic origin and chemical evolution, given the lack of optical absorption lines in the spectra of long-lived FGK-type stars.
Cescutti, Gabriele, Frebel, Anna, Jacobson, Heather R., Matteucci, Francesca, Roederer, Ian U., Thanathibodee, Thanawuth   +5 more
core   +6 more sources

Autocatalytic Sets Arising in a Combinatorial Model of Chemical Evolution [PDF]

Life, 2022
The idea that chemical evolution led to the origin of life is not new, but still leaves open the question of how exactly it could have led to a coherent and self-reproducing collective of molecules.
Wim Hordijk, Mike Steel, Stuart Kauffman
doaj   +2 more sources

The Informational Substrate of Chemical Evolution: Implications for Abiogenesis [PDF]

Life, 2019
A key aspect of biological evolution is the capacity of living systems to process information, coded in deoxyribonucleic acid (DNA), and used to direct how the cell works.
Andrés de la Escosura
doaj   +2 more sources

Chemical Evolution of M31 [PDF]

, 2014
We review chemical evolution models developed for M31 as well as the abundance determinations available for this galaxy. Then we present a recent chemical evolution model for M31 including radial gas flows and galactic fountains along the disk, as well ...
Matteucci, F., Spitoni, E.
core   +3 more sources