text:  Additionally , oxidation of <unk> <unk> and oxidation of <unk> with <unk> <unk> may yield <unk> <unk> . Some <unk> have the unique property of <unk> stable nitrogen atoms at room temperature due to an <unk> barrier of 24 to 31 <unk> / <unk> . <unk> <unk> where <unk> is entirely due to <unk> stable nitrogen are reported . 
  