Stardust and the Molecules of Life (Why are the Amino Acids Left-Handed?)

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A mechanism for creating and selecting amino acid chirality is identified, and subsequent chemical replication and galactic mixing that would populate the galaxy with the predominant species will be described. This involves: (1) the spin of the {sup 14}N in the amino acids, or in precursor molecules from which amino acids might be formed, coupling to the chirality of the molecules; (2) the neutrinos emitted from the supernova, together with magnetic field from the nascent neutron star or black hole from the supernova selectively destroying one orientation of the {sup 14}N, thereby selecting the chirality associated with the other {sup ... continued below

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Boyd, R N; Kajino, T & Onaka, T April 2, 2010.

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A mechanism for creating and selecting amino acid chirality is identified, and subsequent chemical replication and galactic mixing that would populate the galaxy with the predominant species will be described. This involves: (1) the spin of the {sup 14}N in the amino acids, or in precursor molecules from which amino acids might be formed, coupling to the chirality of the molecules; (2) the neutrinos emitted from the supernova, together with magnetic field from the nascent neutron star or black hole from the supernova selectively destroying one orientation of the {sup 14}N, thereby selecting the chirality associated with the other {sup 14}N orientation; (3) amplification by chemical evolution, by which the molecules replicate on a relatively short timescale; and (4) galactic mixing on a longer timescale mixing the selected molecules throughout the galaxy.

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PDF-file: 9 pages; size: 0.7 Mbytes

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  • Presented at: Origin of Matter and Evolution of Galaxies 10, Osaka, Japan, Mar 08 - Mar 10, 2010

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  • Report No.: LLNL-PROC-427547
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 1009224
  • Archival Resource Key: ark:/67531/metadc845715

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  • April 2, 2010

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  • May 19, 2016, 3:16 p.m.

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  • Dec. 2, 2016, 12:36 p.m.

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Boyd, R N; Kajino, T & Onaka, T. Stardust and the Molecules of Life (Why are the Amino Acids Left-Handed?), article, April 2, 2010; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc845715/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.