Results 211 to 220 of about 31,252 (251)
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The Chemistry of Interstellar Space
Angewandte Chemie International Edition in English, 1990AbstractWithin the last ten to twenty years, radioastronomers have discovered the existence of almost 100 different molecules in interstellar space. Ranging in complexity from two to thirteen atoms, these molecules are found in cold, rarefied regions called interstellar clouds, which are giant accumulations of gas and dust located in our galaxy as well
Eric Herbst
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Ion Chemistry in the Interstellar Medium
Annual Review of Analytical Chemistry, 2008We present an overview of the interstellar medium, including physical and chemical conditions, spectroscopic observations, and current challenges in characterizing interstellar chemistry. Laboratory studies of ion-atom reactions, including experimental approaches and instrumentation, are described.
Theodore P Snow, Veronica M Bierbaum
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The interstellar chemistry of PAH cations
Nature, 1998Diffuse interstellar bands (DIBs) are mysterious absorption lines in the optical spectra of stars, and have been known for 75 years. Although it is widely believed that they arise from gas-phase organic molecules (rather than from dust grains) in the interstellar medium, no consensus has been reached regarding their precise cause.
T P, Snow +3 more
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Abundance And Chemistry Of Interstellar Hoco+
Astronomy and astrophysics, 1991Column densities of 10 to the 15th/sq cm toward the Galactic center and not more than 10 to the 12th/sq cm for cold dark clouds are derived from observations using an LVG model, and the chemical implications are discussed. The HOCO(+) 4(04)-3(03) line toward Sgr A is mapped. The fractional abundance of HOCO(+) in the Galactic center region was found to
MINH, YC +4 more
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The chemistry of interstellar nitrogen
Astrophysics and Space Science, 1977A fairly complete but limited set of gas phase reactions involving nitrogen-bearing molecules is linked to a simple model of grain surface reactions. Calculations are performed attempting to simulate the nitrogen chemistry in interstellar clouds of low and high density.
J. B. Pickles, D. A. Williams
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Interstellar Molecules and Interstellar Chemistry
1986Radio astronomers have to date detected some 60 or so molecules in interstellar space. These molecules have been identified, in the majority of cases, by recording the microwave spectrum received by radio telescope from an interstellar or circumstellar dust cloud and comparing it with the spectra produced in laboratory experiments.
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The interstellar chemistry of protostellar disks
Astrophysics and Space Science, 1995A study has been undertaken of the gas-grain chemistry of protostellar disks which are sufficiently cool that in the outer regions, where the gas density is less than ~1013cm-3 and the ionization rate highest, a bimolecular chemistry resembling that of dark clouds can occur.
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International Journal of Mass Spectrometry and Ion Processes, 1985
R. Carbo, A. Ginebreda
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R. Carbo, A. Ginebreda
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Computational Interstellar Chemistry
2010Computational applications of electronic and vibrational many-body theories are increasingly indispensable in interpreting and, in some instances, predicting the spectra of gas-phase molecular species of importance in interstellar chemistry as well as in atmospheric and combustion chemistry.
So Hirata +10 more
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Chemistry in the Interstellar Medium
Annual Review of Physical Chemistry, 1995Over the past 25 years, astronomers have discovered a large number of gas-phase molecules in space, ranging in size up to more than 10 atoms. The molecules, which are mainly organic in nature and comprise both normal and abnormal species, are located between stars, in regions known as interstellar clouds, which contain both gaseous material and ...
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