STUDIES OF CHANGES IN pH PRODUCED BY PURE CULTURES OF ORAL MICRO-ORGANISMS
III. SOME EFFECTS OF MIXING CERTAIN MICRO-ORGANISMS
ROBERT M. STEPHAN 1 and
ELIZABETH S. HEMMENS 1
1 Walter G. Zoller Memorial Dental Clinic, University of Chicago, Chicago, Ill.
Experiments on pH were performed with mixtures of oral lactobacilli and some other oral micro-organisms at high microbic cell concentrations and with a limited amount of substrate. It was found that streptococci, yeasts, and sarcina prevented lactobacilli from reaching their lowest pH levels under these conditions.
Submitted on October 18, 1946
