Abstract
DC conductivity measurements have been carried out on an enzyme amylase (EC 3.2.2.1) in solid pellet form, provided with silver-coated electrodes. The results are presented in the form of current-voltage characteristics for the temperature range 300-360K. The analysis of the results obtained by plotting the temperature dependence of current density, Poole-Frenkel plots, Schottky plots, Richardson plots and Arrhenius plots shows that the Schottky-Richardson mechanism is responsible for the observed d.c. conduction in amylase. Furthermore, the presence of Schottky barriers at the metal electrode-insulator interface suggests that, by using silver electrodes, satisfactory contacts can be achieved for electrical investigations on biomaterials.
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