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Arylamidase Activity of Soils

^a Dep. of Agronomy, Iowa State Univ., Ames, IA 50011-1010 USA

View larger version (21K): [in a new window]   Fig. 1 Effect of buffer pH on release of ß-naphthylamine in assay of arylamidase activity in soils

View larger version (26K): [in a new window]   Fig. 2 Effect of substrate concentration on release of ß-naphthylamine in assay of arylamidase activity in soils

View larger version (24K): [in a new window]   Fig. 3 Effect of time of incubation on release of ß-naphthylamine in assay of arylamidase activity in soils

View larger version (18K): [in a new window]   Fig. 4 Effect of incubation temperature on release of ß-naphthylamine in assay of arylamidase activity in soils; (A) field-moist soils; (B) air-dried soils

View larger version (18K): [in a new window]   Fig. 5 Effect of preheating temperature on release of ß-naphthylamine in assay of arylamidase activity in soils; (A) field-moist soils; (B) air-dried soils

View larger version (16K): [in a new window]   Fig. 6 Arrhenius equation plot of arylamidase activity in soils; (A) field-moist soils, (B) air-dried soils ( )

View larger version (22K): [in a new window]   Fig. 7 The three possible linear plots of the Michaelis–Menten equation for arylamidase activity in soils. Substrate concentration (S) is expressed in mM and the reaction velocity in mmol of ß-naphthylamine released kg-1 of soil h-1