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How to Recognize and Avoid Non-Microbial Enzyme Activity in Foods

Report of Galactosidase Activity in Cheese Particulates in Inoculum Plated in a Chromogenic Enzyme Substrate Medium, with Additional Notes on Shellfish, Tomatillos, and Tart Cherries — Jonathan N. Roth, Ph.D., Micrology Laboratories, LLC, Goshen, IN. Micrology Laboratories L.L.C. develops and manufactures rapid methods microbiological test media which are widely used for QA/QC analyses in the…

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Use Of Redox Compounds In Microbiological Media for the Differentiation of Microbial Growth From Non-Micobial Debris In Test Samples

by Jonathan N. Roth, Ph.D., Micrology Laboratories L.L.C. Certain compounds are not uncommonly incorporated into media formulations due to their unique property of changing color when they change from the reduced state to the oxidized state, or vice versa. These compounds (herein referred to as Redox Compounds) may include various chemical makeups, and examples…

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