Results 221 to 230 of about 8,123 (247)

Abiotic polycyclic aromatic hydrocarbons originating from the sub-oceanic mantle. [PDF]

Sci Rep
Mitsukawa I, Miyake A, Igami Y, Kogiso T, Akizawa N, Matsuno J, Matsumoto M, Tsuchiyama A, Uesugi K, Yasutake M, Taguchi T, Takahashi Y, Yamashita S, Okumura S.   +13 more
europepmc   +1 more source

Water adsorption on a model silicate surface: wollastonite (100).

Nanoscale
Lezuo L, Conti A, Hoheneder A, Vaníčková E, Aloi DA, Abart R, Mittendorfer F, Schmid M, Diebold U, Franceschi G.   +9 more
europepmc   +1 more source

Microbially mediated silicon-based agro-wastes: a possible option in reducing bioaccumulation of arsenic. [PDF]

Front Nutr
Koley S, Garg J, Golui K, Rakshit A.
europepmc   +1 more source

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Interstellar Extinction by Graphite, Iron and Silicate Grains

Nature, 1970
Recent data on the interstellar extinction curve and on the diffuse galactic light may be accounted for by a mixture of graphite, iron and silicate grains.
K Nandy, Wickramasinghe N C, Nandy K
exaly   +3 more sources

Infrared spectra of silicate grains

Astronomische Nachrichten, 1971
AbstractThe observed 10 μm emission is interpreted as due to Si‐O‐stretching vibrations of the SiO4‐tetrahedrons of circumstellar silicate grains.
exaly   +2 more sources

Infrared Extinction Cross Sections of Silicate Grains

Publications of the Astronomical Society of the Pacific, 1973
Extinction cross sections for plagioclase and pyroxene silicate particles have been calculated for frequencies between 10 and 1400 cm-1. Results are compared to infrared observations of grains.
Roger F. Knacke, R. Kevin Thomson
exaly   +2 more sources

The Plausibility of Silicate-Core Ice-Mantle Grains

Astrophysics and Space Science, 1975
Extinction curves for silicate-core ice-mantle grains are computed and compared with the infrared spectral data on the BN object in the Orion nebula. A ratio of outer mantle to core radius of 1.3 which best fits this data suggests that silicate-core ice-mantle grains are unlikely to contribute a major part to the total visual extinction coefficient of ...
M. J. Dempsey, N. C. Wickramasinghe
openaire   +1 more source

Stability of amorphous circumstellar silicate grains

Astronomische Nachrichten, 1986
AbstractBerechnungen innerhalb der klassischen Nukleationstheorie zeigen, daß Mg2SiO4‐Staubteilchen mit Radien von etwa 0,1 μm, die sich mit hoher Wahrscheinlichkeit im zirkumstellaren Raum um Sterne späten Spektraltyps bilden, bei etwa 750 K auskondensieren müssen, um amorph zu bleiben.
Th. Henning, J. Svatoš
openaire   +1 more source

Composite grains: Effects of porosity and inclusions on the silicate feature

Journal of Quantitative Spectroscopy and Radiative Transfer, 2009
Ranjan Gupta
exaly   +2 more sources

Photoelectron yield of silicate and graphite grains

Journal of the Optical Society of America B, 1995
The photoelectric yields of small silicate and graphite grains are calculated as a function of incident photon wavelength for the purpose of modeling interstellar grains. The large surface-to-volume ratio of a small grain is expected to result in an increased photoelectric yield when compared with a bulk sample of the same material.
J. L. Ballester, Y. Shi, E. Dwek
openaire   +1 more source