character: Mr. Patel
topic: Natural Preservatives: A Comprehensive Study
grade: 11
subject: Chemistry
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character: Ms. Smith
topic: The Role of Antioxidants in Food Preservation
grade: 11
subject: Chemistry
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character: Dr. Johnson
topic: Biochemical Properties of Natural Preservatives
grade: 11
subject: Chemistry
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character: Ms. Lee
topic: Evaluation of Natural vs Synthetic Preservatives
grade: 11
subject: Chemistry
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