( ( At ( ( pH values ) ( ( ( below 4 ) or ) ( above 11 ) ) ) ) ( ( ( the rate ) ( of inactivation ) ) ( ( ( is ( very rapid ) ) ( while ( ( at ( ( pH 's ) ( of ( ( ( ( between 4.5 ) and ) 10.5 ) ( the rate ) ) ) ) ) ( , ( ( although ( much slower ) ) ( , ( increases ( as ( ( the solution ) ( becomes ( more alkaline ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN At) (NP (NP (NN pH) (NNS values)) (PP (PP (IN below) (NP (CD 4))) (CC or) (PP (IN above) (NP (CD 11)))))) (NP (NP (DT the) (NN rate)) (PP (IN of) (NP (NN inactivation)))) (VP (VBZ is) (ADJP (RB very) (JJ rapid)) (SBAR (IN while) (S (PP (IN at) (NP (NP (NNP pH) (POS 's)) (PP (IN of) (NP (QP (IN between) (CD 4.5) (CC and) (CD 10.5)) (DT the) (NN rate))))) (, ,) (SBAR (IN although) (S (ADJP (RB much) (JJR slower)))) (, ,) (VP (VBZ increases) (SBAR (IN as) (S (NP (DT the) (NN solution)) (VP (VBZ becomes) (ADJP (RBR more) (JJ alkaline))))))))) (. .)))
At pH values below 4 or above 11 the rate of inactivation is very rapid while at pH's of between 4.5 and 10.5 the rate, although much slower, increases as the solution becomes more alkaline.
(ROOT (S (PP (IN As) (NP (NN ph) (NNS increases))) (, ,) (NP (DT a) (NN solution)) (VP (VBZ becomes) (ADJP (RBR more) (JJ basic))) (. .)))