Results 191 to 200 of about 3,762 (245)

A high-resolution in situ X-ray diffraction study of mineral transitions due to post-hydration heating in CM chondrite meteorites. [PDF]

Earth Planets Space
Jenkins LE, King AJ, Lee MR, Daly L, Thompson SP, Day SJ, Saunders L, Martin PE, Bintang F.   +8 more
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RAMAN-GEOTHERMOMETER FOR CARBONACEOUS CHONDRITES

Доклады Российской академии наук. Физика, технические науки, 2023
Samples of the Murchison meteorite (carbonaceous chondrite, type CM2) were kept isothermally in a specially designed device at temperatures of 200, 500 and 800°C. After the samples cooled down in an inert helium atmosphere, Raman scattering spectra were taken.
S. A. Voropaev, A. P. Krivenko, N. V. Dushenko   +2 more
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Amino acids in carbonaceous chondrites

Origins of Life, 1974
For almost 20 years laboratory experiments have advanced the concepts of chemical evolution, particularly with regard to formation of the amino acids. What has been generally lacking is concrete natural evidence for this chemical evolution hypothesis.
J G, Lawless, E, Peterson
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The ultraviolet spectra of carbonaceous chondrites

Celestial Mechanics and Dynamical Astronomy, 1992
Optical spectroscopy of meteorites is an important laboratory tool for the study of the origin and evolution of solar and galactic interstellar minor bodies. In the region from the visible to the ultraviolet, the absorption spectra have hitherto been measured on the Bruderheim (Egan and Hilgeman, 1975), the Orgueil (Huffman, 1977), the Murchison ...
T. Inagaki, S. Yabushita, K. Wada
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On the origins of organic matter in carbonaceous chondrites [PDF]

Pure and Applied Chemistry, 1993
Abstract
Reisse, Jacques, Mullie, Françoise C.
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A search for C60 in carbonaceous chondrites

Geochimica et Cosmochimica Acta, 1993
Analysis of interior samples of the Murchison meteorite by two routes yielded an upper limit of 2 ppb for its C60 content, as compared to parts per million levels for individual polycyclic aromatic hydrocarbons (PAHs). Provided the samples contain an interstellar component, which is probable since Murchison hydrocarbons contain excess deuterium, this ...
M S, De Vries, K, Reihs, H R, Wendt, W G, Golden, H E, Hunziker, R, Fleming, E, Peterson, S, Chang   +7 more
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Deuterium in carbonaceous chondrites

Earth and Planetary Science Letters, 1980
Hydrogen isotopic compositions in seven carbonaceous chondrites lie in the range -70 to +771 per thousand relative to standard mean ocean water. These values decrease, to a range from -145 to +219 per thousand, after low-temperature oxidation in an oxygen plasma.
Y KOLODNY, J KERRIDGE, I KAPLAN
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Xenon in Carbonaceous Chondrites

Nature Physical Science, 1972
Carbonaceous chondrites contain two isotopically distinct components of trapped xenon which cannot be explained by the occurrence of nuclear or fractionation processes within these meteorites.
O. K. MANUEL, E. W. HENNECKE, D. D. SABU
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The carbonaceous chondrites

Space Science Reviews, 1963
The carbonaceous chondrites are a group of stony meteorites characterized by the presence of an appreciable amount of carbonaceous material other than free carbon (diamond and graphite). They have been divided into three subgroups known respectively as Type I, Type II, and Type III.
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Amino Acids in an Antarctic Carbonaceous Chondrite

Science, 1979
Amino acids have been found in aqueous extracts of a C2 carbonaceous chondrite recovered from Antarctica. The composition of the amino acids strongly suggests that they have a meteoritic origin. Comparison of these results with those obtained with other C2 chondrites supports the view that Antarctic meteorites have not been significantly altered by ...
J R, Cronin, S, Pizzarello, C B, Moore
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