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Possible Scenarios for Homochirality on Earth
Michiya Fujiki
2019
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In 1978, Fred Hoyle proposed that interstellar comets carrying several viruses landed on Earth as part of the panspermia hypotheses. With respect to life, the origin of homochirality on Earth has been the greatest mystery because life cannot exist without molecular asymmetry. Many scientists have proposed several possible hypotheses to answer this long-standing L-D question. Previously, Martin Gardner raised the question about mirror symmetry and broken mirror symmetry in terms of the homochirality question in his monographs (1964 and 1990). Possible scenarios for the L-D issue can be categorized into (i) Earth and exoterrestrial origins, (ii) by-chance and necessity mechanisms, and (iii) mirror-symmetrical and non-mirror-symmetrical forces as physical and chemical origins. These scenarios should involve further great amplification mechanisms, enabling a pure L- or D-world.
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Keywords
- ?-strand
- absolute asymmetric synthesis
- achiral stationary phase
- amino acid handedness
- amino acids
- assemblies
- asymmetric autocatalysis
- asymmetric reaction
- asymmetric synthesis
- autocatalysis
- biological homochirality
- bioorganic homochirality
- C1- and C2-symmetric catalysts
- chiral field (memory)
- chiral separation
- Chirality
- chirogenesis
- circular dichroism
- circularly polarized light
- circularly polarized luminescence
- circularly polarized photon
- deracemization
- enantiomer self-disproportionation
- enantiomorphism
- enantioselective reaction
- environmental chirality
- etch figures
- genesis of life chirality
- Gravitation
- heat capacity
- hidden chirality
- high dimensional chirality
- homochiral and heterochiral aggregates
- homochirality
- Lipid
- magmatic flow
- Magnetism
- metal-organic framework
- multi-point approximation
- nepheline
- Neutrinos
- nucleus–molecular coupling
- origin of life
- parity violation
- parity violation in the weak interaction
- plasma reactor
- polymer
- Prebiotic
- precision measurement
- racemate
- racemic field
- replicators
- Salam hypothesis
- SDE
- self-assembly
- Soai reaction
- spin polarized electrons
- spin-polarized lepton
- super-high-velocity impact
- supramolecular assembly
- supramolecular chirality
- symmetry breaking
- tilt-chirality
- triethylenediamine (DABCO) molecules
- Tunneling
- two-fold helix
- Viedma ripening effect
- vortex
- Wallach’s rule
- weak neutral current
- Z0 boson
Links
DOI: 10.3390/books978-3-03921-723-6Editions
