Abstract
Summary
(1) Maltose or takadiastase digested starch has been found to be one of the many growth stimulants for L. fermenti 36 in assay of thiamine. It is also stimulatory to L. arabinosus 17-5 and Strep, jaecalis R. in assays of pantothenic acid and pyridoxine. (2) Evidence has been obtained to prove that a precaution should be made on thiamine assay of starchy substances using L. fermenti 36 as test organism. Addition of enzyme digested starch or maltose to the assay medium is recommended.
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