Results 201 to 210 of about 210,874 (237)
PDZ-directed substrate recruitment is the primary determinant of specific 4E-BP1 dephosphorylation by PP1-Neurabin. [PDF]
ElifeFedoryshchak RO +4 more
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Chemical abundances of planet-host stars. Results for alpha and Fe-group elements
, 2003 A. Bodaghee +3 more
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Chemical Abundances of Symbiotic Giants [PDF]
EAS Publications Series, 2015 High resolution (R ∼ 50000), near-IR spectra were used to measure photospheric abundances of CNO and elements around the iron peak for 24 symbiotic giants. Spectrum synthesis was employed using local thermal equilibrium and hydrostatic model atmospheres. The metallicities are distributed in a wide range with maximum around [ Fe / H ] ∼−0.4 – − 0.3 dex.
J. Mikolajewska +3 more
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Stellar chemical abundances with the GHRS
Physica Scripta, 1996The accurate quantitative analysis of high resolution ultraviolet spectra of ultra-sharp-lined early-type, chemically peculiar stars, obtained with the Goddard High Resolution spectrograph on the Hubble Space Telescope, has been made possible by the synergism between state-of-the-art astro-physics and state-of-the-art atomic spectroscopy. We illustrate
Glenn M. Wahlgren +6 more
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1988
The precise determination of chemical abundances in stars is the key to a number of important disciplines in modern astrophysics including stellar evolution and nucleosynthesis as well as the chemical and dynamical evolution of the Galaxy. The basic transport mechanisms in stellar atmospheres rule the observational aspects of stellar surfaces which are
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The precise determination of chemical abundances in stars is the key to a number of important disciplines in modern astrophysics including stellar evolution and nucleosynthesis as well as the chemical and dynamical evolution of the Galaxy. The basic transport mechanisms in stellar atmospheres rule the observational aspects of stellar surfaces which are
openaire +2 more sources
Chemical Abundances in Meteorites
1988Some 4.6 billion years ago contraction and subsequent collapse of an interstellar cloud led to the formation of the solar system. The ratio of heavy elements to hydrogen, increasing continuously in interstellar material, due to the addition of freshly synthesized material from stars, was frozen in for the solar system at this point of time.
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Chemical Abundances in Galaxies
1988This article is intended as a brief overview of chemical abundances in galaxies other than our own. Attention is concentrated on global properties of ellipticals and spirals, and the methods by which abundances are estimated. References are predominantly to work which has appeared since the review of Pagel and Edmunds (1981).
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1981
Photoelectric, filter photometry and spectrophotometry allow us to derive absolute abundances for a number of species in comets. Despite large differences in morphology, in gas-to-dust ratio, and in dynamical age, there appears to be remarkably little variation from comet to comet in the relative production rates of the species studied thus far.
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Photoelectric, filter photometry and spectrophotometry allow us to derive absolute abundances for a number of species in comets. Despite large differences in morphology, in gas-to-dust ratio, and in dynamical age, there appears to be remarkably little variation from comet to comet in the relative production rates of the species studied thus far.
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Chemical Abundances in Molecular Clouds
1987At present approximately 70 interstellar molecules are known. We discuss methods for determining chemical abundances in interstellar clouds and present results for the best studied regions, which include the “spiral arm” clouds seen towards distant continuum sources, quiescent dark and giant clouds, and the gas in regions of active star formation.
Paul F. Goldsmith +2 more
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