olivine has been researched along with formamide* in 2 studies
2 other study(ies) available for olivine and formamide
| Article | Year |
|---|---|
Cryogenic synthesis of molecules of astrobiological interest: catalytic role of cosmic dust analogues.
We have studied the effects of the substrate, namely amorphous olivine (MgFeSiO(4)) cosmic dust analogues (CDAs), in synthesis of molecules obtained after 200 keV proton irradiation of formamide (NH(2)COH). Formamide has been deposited on the olivine substrate at 20 K. The abundances of new molecular species formed after an irradiation dose of 12 eV/16 amu in formamide pure (i.e. deposited on an inert silicon substrate) and deposited on CDAs have been compared. Specifically, MgFeSiO(4) amorphous olivine is a selective catalyst preventing formation of NH(3) and CN(-) molecules and changing the relative abundances of NH4(+)OCN(-), CO(2), HNCO, CO. We have shown that the role of CDAs has to be taken into account in experiments simulating processes occurring in astronomical environments. Topics: Ammonia; Astronomical Phenomena; Astronomy; Catalysis; Cosmic Dust; Cyanides; Evolution, Chemical; Extraterrestrial Environment; Formamides; Inorganic Chemicals; Iron Compounds; Magnesium Compounds; Silicates; Spectrophotometry, Infrared | 2006 |
Synthesis and degradation of nucleic Acid components by formamide and cosmic dust analogues.
We show the unprecedented one-pot synthesis of a large suite of pyrimidines (including cytosine and uracil) and purines from formamide in the presence of cosmic-dust analogues (CDAs) of olivines. Since the major problem in the origin of informational macromolecules is the instability of their precursors, we also investigate the stabilizing effect of CDAs on the intrinsic instability of oligonucleotides in formamide. Topics: Catalysis; Cosmic Dust; Cytosine; Formamides; Iron Compounds; Magnesium Compounds; Magnesium Silicates; Mass Spectrometry; Microscopy, Electron, Scanning; Nucleic Acids; Oligonucleotides; Purines; Silicates; Uracil | 2005 |