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character:
Nitrifying Bacteria
topic:
Roles of Bacteria in Converting Ammonia to Nitrate
subject:
Science
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character:
Nitrosomonas
topic:
Ammonia Oxidation
subject:
Science
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character:
Nitrobacter
topic:
Nitrate Production
subject:
Science
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character:
Role of Bacteria
topic:
Nitrogen Cycle
subject:
Science
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