| Budget Amount *help |
¥50,050,000 (Direct Cost: ¥38,500,000、Indirect Cost: ¥11,550,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2011: ¥35,490,000 (Direct Cost: ¥27,300,000、Indirect Cost: ¥8,190,000)
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| Outline of Final Research Achievements |
Many organic compounds such as amino acids and carboxylic acids have been found in carbonaceous chondrites. However, these water-soluble compounds are likely hydrolysable products by chemical oxidation through aqueous alteration on the meteorite parent bodies. Significant amounts of polar compounds soluble in alcohol have not been characterized yet, even though their bulk isotopic compositions are extremely enriched in D and 15N, suggesting the most primitive organic signature. In this study, the polar solvent extracts of carbonaceous chondrites were analyzed by HPLC/ ultrahigh-resolution mass spectrometry to explore the most primitive organic compounds. Various N-containing cyclic compounds with their extensive alkylated homologs were identified in the methanol extract, which could be produced from aldehydes and ammonia in Solar or pre-solar environments.
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