alexa An extended model for the evolution of prebiotic homochirality: a bottom-up approach to the origin of life.
Infectious Diseases

Infectious Diseases

Air & Water Borne Diseases

Author(s): Gleiser M, Walker SI

Abstract Share this page

Abstract A generalized autocatalytic model for chiral polymerization is investigated in detail. Apart from enantiomeric cross-inhibition, the model allows for the autogenic (non-catalytic) formation of left and right-handed monomers from a substrate with reaction rates epsilon L and epsilon R, respectively. The spatiotemporal evolution of the net chiral asymmetry is studied for models with several values of the maximum polymer length, N. For N = 2, we study the validity of the adiabatic approximation often cited in the literature. We show that the approximation obtains the correct equilibrium values of the net chirality, but fails to reproduce the short time behavior. We show also that the autogenic term in the full N = 2 model behaves as a control parameter in a chiral symmetry-breaking phase transition leading to full homochirality from racemic initial conditions. We study the dynamics of the N--> infinity model with symmetric (epsilon L = epsilon R) autogenic formation, showing that it only achieves homochirality for epsilon > epsilon c, where epsilon c is an N-dependent critical value. For epsilon
  • DOI: 10.1007/s11084-008-9134-5
  • This article was published in Orig Life Evol Biosph and referenced in Air & Water Borne Diseases

    Relevant Expert PPTs

    Relevant Speaker PPTs

    Recommended Conferences

    Relevant Topics

    Peer Reviewed Journals
    Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
    International Conferences 2017-18
    Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

    Contact Us

    © 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version