character: Dr. Lopez
topic: The Role of Antioxidants in Food Products
grade: 9
subject: Chemistry
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character: Professor Smith
topic: Understanding Free Radicals in Chemistry
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: The Importance of Vitamins and Minerals in Nutrition
grade: 9
subject: Chemistry
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character: Mr. Wang
topic: How Preservatives Affect Food Quality
grade: 9
subject: Chemistry
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