ABSTRACT
Some of the possible laboratory experiments, in addition to astrophysical and astrobiological observations, include the following:(A) We propose to test a hypothesis that life originated when the essential trace element abundance curve of life and the galactic abundance curve coincided. There are possibilities that such a coincidence occurred in the solar neighborhood, Milky Way galaxy or the damped Lyman-alpha (DLA) system at a particular redshift.(B) An experimental study of nuclear reactions that might influence the abundance of light elements (Li, Be, B), especially B, on cosmic dust particles, prime candidate sites for the origin of life.(C) An establishment of possible dependence of concentration factors for essential trace elements on the magnetic field intensity.(D) Preferential destruction of enantiomers. Assuming that amino acids could be synthesized on dust particles in interstellar space, the observed optical activity may be a result of polarized proton bombardment.(E) Since interstellar dust appears to play a critical role in the formation of interstellar molecules, molecules may be formed on or in grain surfaces. One could study the growth of single-cell microorganisms in such a medium (with varying concentration factors of essential trace elements).
