character: Professor John Smith
topic: Fundamentals of Chromatography
grade: 9
subject: Chemistry
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character: Dr. Emily Carter
topic: Introduction to Separation Techniques
grade: 9
subject: Chemistry
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character: Ms. Laura Green
topic: Applications of Chromatography in Chemistry
grade: 9
subject: Chemistry
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character: Mr. David Johnson
topic: Principles of Chemical Separation
grade: 9
subject: Chemistry
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