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Introduction: The origin of water and organic molecules in the early solar system has been under intense scrutiny since it was realized that these compounds were systematically enriched in deuterium relative to molecular hydrogen in the protosolar nebula (PSN). (D/H)PSN = 25 x10-6 i.e. δD =-840‰. For example, in the Orgueil meteorite [1], water has a D/H(More)
Questions • The central questions of the study are: – What is the resource base in place? – What portion of that resource is recoverable? – What pace of drilling activity will be necessary to sustain production at various levels? – How achievable is this activity level, given advances in technology and natural gas prices? Geologic Analysis We estimate the(More)
Alkyne-dicobalt hexacarbonyl complexes have been studied by DFT to examine whether electronic differences in the acetylenic substituents could play a role in determining the regiochemical outcome in the Pauson-Khand reaction. It appears that in some instances the regiochemistry is, in fact, governed exclusively by the electronic nature of the acetylenic(More)
Introduction: Carbonaceous chondrites are the most primitive objects of the solar system. They exhibit significant carbon contents and most of this carbon occurs as insoluble organic matter (IOM), which might be the first OM available on early Earth for life. Moreover, prebiotic molecules have been identified in the soluble organic fraction of the(More)
Introduction: Apart from [1], the insoluble organic matter (IOM) isolated from meteorites has been mostly studied in car-bonaceous chondrites (CCs) during the last decade. Numerous details were obtained concerning the macromolecular structure or the isotopic composition of the IOM. In the present study, HF-HCl treatments previously improved on carbonaceous(More)
Introduction Carbonaceous chondrites are known to contain a substantial amount of carbon, mostly occurring as macromolecular insoluble organic matter (IOM). Mainly owing to limitations of analytical tools, the precise chemical structure of this IOM is not yet fully elucidated. However, the macromolecular network of the chondritic IOM is known to be based on(More)
Introduction: The in situ decay of 10 Be (half-life =1.5My) has been demonstrated in many Ca-Al-rich refractory inclusions (CAIs) of primitive meteorites by the positive correlations observed between 10 B/ 11 B and 9 Be/ 11 B ratios [1-4]. These correlations indicate that the 10 Be/ 9 Be ratios at the time of formation of these CAIs varied from ≈10-3 to 4×10