Further Life-forms in the Orgueil Meteorite
نویسندگان
چکیده
منابع مشابه
Optical ActivitY in the Orgueil Meteorite.
Nagy's report of an optical rotation of-0.023 degrees to -0.084 degrees in the Orgueil meteorite has not been confirmed. The highest rotation found in several fatty-acid and hydrocarbon fractions isolated from the meteorite was -0.002 degrees , less than that of optically inactive controls. The "rotations" observed by Nagy may have been caused by scattered depolarized light from colloidal parti...
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The organized elements of the Orgueil Meteorite were examined by quantitative fluorescence microscopy. An effort was made to correlate possible morphology with the presence of the amino acid, tyrosine. Relative tyrosine levels were determined by the formation of fluorescent complexes between the tyrosine presem and 1-NITROS O 2-NAPHTHOL. The fluorescence levels produced by the tyrosine-nitroso ...
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The Orgueil meteorite has become one of the most well-studied carbonaceous meteorites, after it fell in France 150 yr ago. Extraterrestrial organic compounds such as amino acids and nucleobases in the parts per billion ranges were identified in Orgueil samples with supporting isotopic analyses. However, speculations of terrestrial contamination such as organic inclusions in the form of microbes...
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15 صفحه اولAuthenticity of the Life-bearing Polonnaruwa Meteorite
We show that the Polonnaruwa stones that were collected on 29 December 2012 following a witnessed fireball, in which we found biological structures, do not possess properties that are consistent with fulgurites on the basis of X-ray diffraction studies, and other data. The existence of distinct diatom frustules fused into the rock matrix makes recent contamination unlikely.
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ژورنال
عنوان ژورنال: Nature
سال: 1962
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1941065b0