A Dehydrated Experimental Medium for the Microbiological Assay of Folic Acid

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Abstract
The value of a standardized, quickly prepd., commercially available dehydrated medium is emphasized. Suggestions are made for the modification of a Difco dehydrated "pantothenate assay broth, exptl.," to conform with an exptl. modification of the medium of Teply and Elvehjem for the microbiological assay of folic acid, using Streptococcus faecalis R as the test organism.