Results 61 to 70 of about 36,750 (220)
International Journal of Chemical Kinetics, Volume 58, Issue 6, Page 269-277, June 2026.ABSTRACT In the past two decades numerous experiments have been conducted on the kinetics of reactions occurring at low temperatures on inert matrices. In particular, unimolecular proton‐transfer photo‐reactions of compounds containing a carbon–sulfur double bond, or thione group C═S, can lead to the formation of higher energy isomers or tautomers with
Judith Wurmel, John M. Simmie
wiley +1 more source
Interstellar abundances : gas and dust.
The Astrophysical Journal, 1974 Data on abundances of interstellar atoms, ions and molecules in front of zeta Oph are assembled and analyzed. The gas-phase abundances of at least 11 heavy elements are significantly lower, relative to hydrogen, than in the solar system. The abundance deficiencies of certain elements correlate with the temperatures derived theoretically for particle ...
openaire +1 more source
Combustion and Pyrolysis EA‐IRMS Techniques to Determine the δ2H of Diamonds
Rapid Communications in Mass Spectrometry, Volume 40, Issue 10, 30 May 2026.ABSTRACT Rationale Diamonds are generally considered to be metasomatic minerals originating from the Earth's mantle. They formed through the interaction of carbon‐bearing fluids or melts with the surrounding deep lithology. Most knowledge about the formation of diamonds comes from studying their mineral inclusions or stable isotopes.
François Fourel +4 more
wiley +1 more source
The Infrared Complex Refractive Index and Band Strengths of Coronene Thin Films
The Astrophysical JournalPolycyclic aromatic hydrocarbon (PAH) molecules have long been theorized to be present in a multitude of interstellar environments. The radio-frequency detections of specific cyanosubstituted PAH molecules in the Taurus Molecular Cloud have provided new ...
J. E. Roser, L. Jovanović, A. Ricca
doaj +1 more source
The Planetary Science Journal, 2023 We measured the chemical composition of comet C/2021 A1 (Leonard) using the long-slit echelle grating spectrograph iSHELL/IRTF on 2021 December 20 and on 2022 January 8 and 9.
Sara Faggi +3 more
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Abundances and Depletions of Interstellar Oxygen [PDF]
The Astrophysical Journal, 2005 62 total pages (37 text), 15 figures, 9 ...
Jensen, Adam G. +2 more
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Modelling the nebular emission from primeval to present-day star-forming galaxies [PDF]
, 2016 We present a new model of the nebular emission from star-forming galaxies in a wide range of chemical compositions, appropriate to interpret observations of galaxies at all cosmic epochs.
Bruzual, Gustavo +2 more
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ChemPhysChem, Volume 27, Issue 8, 28 April 2026.For directly comparing experimental results on gas‐phase ion reactions with the predictions from quantum chemical calculations, the latter must first be converted into rate constants. This review addresses the question of whether current methods of statistical rate theory can accomplish this task reliably. Statistical rate theory has long been used for
Thomas Auth, Konrad Koszinowski
wiley +1 more source
Features of Chemical-Element Abundances in Open Star Clusters of the Galaxy
Open Astronomy, 2016 On the basis of the authors’ compiled catalog containing spectroscopic abundances of 14 chemical elements for 90 open star clusters of the Galaxy, we show that in the young clusters not only barium but also three other studied elements of slow neutron ...
Marsakov V. A. +3 more
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The Abundance of Interstellar Boron
The Astrophysical Journal, 2000 Accepted for publication in The Astrophysical Journal. 13 pages, including 2 tables and 4 figures. Also available at http://fuse.pha.jhu.edu/~howk/Papers/
Howk, J. Christopher +2 more
openaire +2 more sources