Assertion: nitrogen's compound | /r/HasProperty | urea
Facets:
Source sentences:
text: In order to be utilized in most biological processes, N 2 must be converted to reactive N (Nr), which includes inorganic reduced forms (NH 3 and NH 4 +), inorganic oxidized forms (NO, NO 2 , HNO 3 , N 2 O, and NO 3 −), and organic compounds (urea, amines, and proteins).