( ( The reaction ) ( ( was ( run ( with ( ( ( ( ( varying concentrations ) ( of ( reactants ( and ( copper catalyst ) ) ) ) ) , ) ( as ( well as ) ) ) ( varying temperatures ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN reaction)) (VP (VBD was) (VP (VBN run) (PP (IN with) (NP (NP (NP (VBG varying) (NNS concentrations)) (PP (IN of) (NP (NNS reactants) (CC and) (NN copper) (NN catalyst)))) (, ,) (CONJP (RB as) (RB well) (IN as)) (NP (VBG varying) (NNS temperatures)))))) (. .)))
The reaction was run with varying concentrations of reactants and copper catalyst, as well as varying temperatures.
(ROOT (S (SBAR (IN If) (S (NP (DT a) (NN catalyst)) (VP (VBZ runs) (PRT (RP out))))) (, ,) (NP (DT the) (NN reaction)) (VP (VBZ slows)) (. .)))