( ( This reaction ) ( ( plays ( ( a ( critical role ) ) ( in ( ( the ( pyrolysis ( , ( oxidation ( , ( and combustion ) ) ) ) ) ) ( of ( ( ( hydrocarbons and ) oxygenated ) hydrocarbons ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN reaction)) (VP (VBZ plays) (NP (NP (DT a) (JJ critical) (NN role)) (PP (IN in) (NP (NP (DT the) (NN pyrolysis) (, ,) (NN oxidation) (, ,) (CC and) (NN combustion)) (PP (IN of) (NP (ADJP (JJ hydrocarbons) (CC and) (JJ oxygenated)) (NNS hydrocarbons))))))) (. .)))
This reaction plays a critical role in the pyrolysis, oxidation, and combustion of hydrocarbons and oxygenated hydrocarbons.
(ROOT (S (NP (NNP Combustion) (NNS reactions)) (VP (VBP involve) (S (NP (NP (DT the) (NN reaction)) (PP (IN of) (NP (NP (DT a) (NN hydrocarbon)) (PP (IN with) (NP (NN oxygen) (NN gas)))))) (VP (TO to) (VP (VB produce) (NP (NN water) (CC and) (NN carbon) (NN dioxide)))))) (. .)))