nitrogenize

from The American Heritage® Dictionary of the English Language, 5th Edition.

• transitive verb To combine or treat with nitrogen or a nitrogen compound.

from The Century Dictionary.

• To impregnate or imbue with nitrogen. Also spelled nitrogenise.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb (Chem.) To combine, or impregnate, with nitrogen or its compounds.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb transitive to treat something with nitrogen of a nitrogen compound

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb treat with nitrogen or a nitrogen compound