character: Ms. Lee
topic: Chemical Reactions in Food Preservation
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: Biochemical Processes in Fermentation
grade: 9
subject: Chemistry
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character: Dr. Brown
topic: The Role of Acids and Bases in Food Safety
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Oxidation and Reduction in Food Spoilage
grade: 9
subject: Chemistry
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