Food bacteria research

Food bacteria research

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Credit: STEPHEN AUSMUS/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY

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Caption: Food bacteria research. Chemist (left) inserting a meat sample into a photometer, as a technician prepares other samples for analysis using a large pipette. This research is being done to check for the presence of bacteria on the meat. A photometer measures the amount of light that is able to be transmitted through a sample. This is cross-referenced with samples of known concentration in order to determine the number of bacteria present in the test sample.

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