| nitrobacter | A genus of gram-negative, rod-shaped bacteria that oxidises nitrites to nitrates. Its organisms occur in aerobic environments where organic matter is being mineralised. (12 Dec 1998) |
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| nitrobacteraceae | A family of gram-negative bacteria which derive energy from the oxidation of ammonia to nitrite or nitrite to nitrate. Its organisms are commonly found in soil and fresh water. (12 Dec 1998) |