The Relation of the Bacterial Production of Ammonia Gas to the Growth of Other Microorganisms

Abstract
A bacterial strain, secured from a plate contaminant, can produce NH3 gas in such amts. as to change the pH of buffered agar some distance away. This behavior can result in the complete inhibition of the growth of the mold, Neurospora crassa, and, in addition, can enable the growth of a 2d strain of bacteria with a demanding pH requirement.

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