character: Professor Liam Chen
topic: Role of Transition Metals in Biological Systems
grade: 9
subject: Chemistry
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character: Dr. Maria Gonzalez
topic: Biochemical Functions of Iron in the Human Body
grade: 9
subject: Chemistry
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character: Ms. Sarah Patel
topic: Zinc: Essential Trace Element in Enzymatic Reactions
grade: 9
subject: Chemistry
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character: Mr. John Smith
topic: Copper: Role in Electron Transport and Metabolism
grade: 9
subject: Chemistry
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