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...
متن کاملA study of the optical rotation of lipids extracted from soils, sediments, and the orgueil carbonaceous meteorite.
During the past few years a considerable amount of information has been accumulated on the optical rotatory dispersion of biologically significant compounds. Optical rotatory dispersion data has, in several instances, been useful in elucidating structural details of molecules, such as those of certain proteins. The optical rotations of several lipid and hydrocarbon compounds are also known. On ...
متن کاملClassics in space medicine. Examination of "organized elements" from the Orgueil meteorite by quantitative fluorescence microscopy.
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 ...
متن کاملA contamination assessment of the CI carbonaceous meteorite Orgueil using a DNAdirected approach
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...
متن کاملcomparison of catalytic activity of heteropoly compounds in the synthesis of bis(indolyl)alkanes.
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
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ژورنال
عنوان ژورنال: Science
سال: 1965
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.150.3705.1846