( ( ( ( ( ( ( Nitrogen Oxides ) ( -LRB- ( NOx -RRB- ) ) ) - ) ( gases ( ( formed ( in ( great part ) ) ) ( from ( atmospheric nitrogen ) ) ) ) ) and ) ( oxygen ( when ( combustion ( ( takes place ) ( under ( conditions ( of ( ( ( high temperature ) and ) ( high pressure ) ) ) ) ) ) ) ) ) ) ; )
(ROOT (NP (NP (NP (NP (NNP Nitrogen) (NNP Oxides)) (PRN (-LRB- -LRB-) (NP (NNP NOx)) (-RRB- -RRB-))) (: -) (NP (NP (NNS gases)) (VP (VBN formed) (PP (IN in) (NP (JJ great) (NN part))) (PP (IN from) (NP (JJ atmospheric) (NN nitrogen))))) (CC and) (NP (NP (NN oxygen)) (SBAR (WHADVP (WRB when)) (S (NP (NN combustion)) (VP (VBZ takes) (NP (NN place)) (PP (IN under) (NP (NP (NNS conditions)) (PP (IN of) (NP (NP (JJ high) (NN temperature)) (CC and) (NP (JJ high) (NN pressure))))))))))) (: ;)))
Nitrogen Oxides (NOx)-gases formed in great part from atmospheric nitrogen and oxygen when combustion takes place under conditions of high temperature and high pressure;
(ROOT (S (NP (NNP Nitrogen)) (VP (VBZ oxide) (NP (NP (NN form)) (PRN (-LRB- -LRB-) (PRP s) (-RRB- -RRB-)) (SBAR (WHADVP (WRB when)) (S (NP (NN nitrogen) (CC and) (NN oxygen)) (VP (VBP combine) (PP (IN at) (NP (JJ high) (NNS temperatures)))))))) (. .)))