-------------------------------------------------------- Eh -450 mV Sulfate-reducing bacteria at pH 9.5 -------------------------------------------------------- Table VI.—_Extremes of Chemical Environmental Factors Permitting Growth or Activity_ ---------------------------------------------------------------------- Chemical Maximum Pressure, Time, Organism Activity factor atm days ---------------------------------------------------------------------- O₂ 100% 1 Plants, Growth animals ---------------------------------------------------------------------- O₃ 100 ppm 5 _Armillaria Growth (ozone) --------------------------- mellea_ ----------------- 500 ppm 5 Light emission ---------------------------------------------------------------------- H₂ 100% Various Germination plants ---------------------------------------------------------------------- H₂O Aw 1.0 1 Various Growth aquatic organisms ---------------------------------------------------------------------- H₂O₂ 0.34% Rye Germination enhanced ---------------------------------------------------------------------- He 100% Wheat, rye, Germination rice ---------------------------------------------------------------------- CO 100% Rye Germination -------------------------------------------------------------- 80% 1.1 4 _Hydrogenomonas_ Growth ---------------------------------------------------------------------- CO₂ 100% 1.1 4 Rye Growth and germination ---------------------------------------------------------------------- CH₄ 100% 1.1 4 Rye Germination ---------------------------------------------------------------------- CH₂O 50% Rye Germination ---------------------------------------------------------------------- CH₃OH 50% Rye Germination ---------------------------------------------------------------------- N₂ 100% .1 10 Various plants Germination and root growth ----------------------------------------------------------------------