The rate of growth of bacterial strains oxidizing carbon monoxide (Pseudomonas gazotropha Z-1156, Comamonas compransoris Z-1155, and Seliberia carboxydohydrogena Z--1062) was studied as a function of the concentration of NH4Cl in the medium. The bacteria could grow on media containing various nitrogen sources (NH4Cl, KNO3, CO(NH2)2). Changes in the amino acid content and biochemical composition of the biomass were studied during growth of the bacteria on these media. The biological value of proteins of the bacteria was estimated.
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