Results 21 to 30 of about 2,942 (252)
Collisions between carbonaceous grains in the interstellar medium [PDF]
Astronomy & Astrophysics, 2004 9 pages, 11 figures, in press in Astronomy and ...
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Presolar grains in primitive ungrouped carbonaceous chondrite Northwest Africa 5958 [PDF]
Meteoritics & Planetary Science, 2019 AbstractWe report a correlated NanoSIMS‐transmission electron microscopy study of the ungrouped carbonaceous chondrite Northwest Africa (NWA) 5958. We identified 10 presolar SiC grains, 2 likely presolar graphite grains, and 20 presolar silicate and/or oxide grains in NWA 5958. We suggest a slight modification of the commonly used classification system
Larry R. Nittler +3 more
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Motion of dust ejected from the surface of asteroid (101955) Bennu
Heliyon, 2020 From Jan. 6, 2019 to Feb. 18, 2019, OSIRIS-REx observed asteroid (101955) Bennu ejecting 11 plumes of dust, of which part is escaping and another part is re-captured by the asteroid.
Yu Jiang, Jürgen Schmidt
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Formation of CO2 Driven by Photochemistry of Water Ice Mixed with Carbon Grains
The Astrophysical Journal, 2023 We present results on photochemistry of carbon-grains/water-ice mixtures at temperatures from 10 to 150 K. Such a temperature range corresponds to the physical conditions found in molecular clouds, hot cores and corinos, protostellar envelopes, and ...
Alexey Potapov +3 more
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Life, 2022 The stable isotope composition of soluble and insoluble organic compounds in carbonaceous chondrites can be used to determine the provenance of organic molecules in space.
Heather V. Graham +4 more
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The Astrophysical Journal Letters, 2023 Nucleosynthetic isotope anomalies in meteorites allow distinguishing between the noncarbonaceous (NC) and carbonaceous (CC) meteorite reservoirs and show that correlated isotope anomalies exist in both reservoirs.
Jonas M. Schneider +2 more
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Reduction of Lead Oxide by Fine-Grained Carbonaceous Materials
Archives of Metallurgy and Materials, 2019 As part of the presented work, tests were carried out to check the possibility of replacing of conventional reducers used in the lead pyrometallurgical processes by cheaper, but equally effective substitutes. For research of lead oxide reduction, the following fine-grained carbonaceous materials were used, ie anthracite dust and coal flotation ...
T. Matuła, G. Siwiec
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Superiority of Thiourea Au Extraction from Low Graphiticity Carbonaceous Gold Ores
Journal of MMIJDouble refractory gold ores (DRGOs), in which few percentages of carbonaceous matter are present and gold grains are encapsulated in sulfides, have been abandoned to develop due to economic loss caused by adsorption of Au(CN)2− on carbonaceous matter ...
Ikumi SUYAMA +2 more
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Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2005 Dust is an ubiquitous inhabitant of the interstellar medium, and leaves an unmistakable signature in its optical properties, and physico-chemical evolution.
Borghese, F +4 more
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Геодинамика и тектонофизика, 2022 On the one hand, the widespread use of electron microprobe analysis in the version of a scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS) and, on the other hand, the comparability of the metrological characteristics
D. K. Belyanin +3 more
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