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1 Columbia University School of Dental and Oral Surgery, New York, N. Y.
A. israeli, as indicated by study of 6 strains, was unable to decompose protein material into such simpler compounds as indole or H2S; also was not able to raise the alkalinity of media or precipitate calcium from an inorganic calcium chloride solution that did not contain phosphate ions.
A. israeli, as indicated by study of 6 strains, contains alkaline phosphatase and, therefore, may cause precipitation of calcium phosphates from the saliva and initiate calculus formation.
Submitted on November 9, 1944
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