character: Professor Lee
topic: Advanced Filtration Techniques in Water Treatment
grade: 11
subject: Chemistry
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character: Dr. Smith
topic: Innovative Methods in Water Purification
grade: 11
subject: Chemistry
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character: Mr. Johnson
topic: The Chemistry of Membrane Filtration
grade: 11
subject: Chemistry
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character: Ms. Taylor
topic: Sustainable Practices in Water Treatment Systems
grade: 11
subject: Chemistry
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