character: Ignaz Semmelweis
topic: Pioneering antiseptic techniques in childbirth
grade: 11
subject: Chemistry
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character: Louis Pasteur
topic: Germ theory of disease
grade: 11
subject: Chemistry
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character: Joseph Lister
topic: Antisepsis in surgery
grade: 11
subject: Chemistry
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character: Robert Koch
topic: Isolation of pathogens and Koch's postulates
grade: 11
subject: Chemistry
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