1. See A. I. Oparin in "The Origin and Initial Development of Life " NASA Tech. Trans. NASA TTF-488 (1966) pp. 20-22.
2. Organic Matter and the Moon;Sagan C.;Nat. Acad. Sci.-Nat. Res. Counc. Pubi.,1961
3. The medium contained 1.0 g/liter of glycerol sodium salts of lactate pyruvate and acetate methanol ethanol K2HPO4 KNO3 and (NH4)2SO4; 0.2 g/liter of 18 DL-amino acids glycine 4-hydroxy-L-proline jI-alanine; 0.01 g/liter of seven purines and pyrimidines; and trace quantities of 16 vitamins; pH adjusted to 3.0 with HCI.
4. Same as described in (3) but with pH 7.0.
5. Same as described in (3) but with pH adjusted to 10-11 with NaOH.