title: Studies of changes in pH produced by pure cultures of oral micro-organisms; effects of varying the microbic cell concentration; comparison of different micro-organisms and different substrates; some effects of mixing certain micro-organisms.
authors.forename: R M
authors.initials: RM
authors.lastname: STEPHAN
authors.forename: E S
authors.initials: ES
authors.lastname: HEMMENS
mesh_terms: D001432:Bacteriology; D005145:Face; D009055:Mouth / Q000382:microbiology*
keywords: MOUTH/bacteriology