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Title: Inactivation of enzymes under high pressure : 1. Inactivation of salivary α-amylase under high pressure
Authors: Kitamura, Kiyoshi
Issue Date: 20-Dec-1965
Publisher: The Physico-Chemical Society of Japan
Journal title: The Review of Physical Chemistry of Japan
Volume: 35
Issue: 1
Start page: 44
End page: 49
Abstract: It has been found that α-amylase of human saliva is inactivated in aqueous solution by an application of high pressure above 5, 000kg/cm^2. The inactivation by high pressure follows first order kinetics, with respect to the enzyme concentration. The rate of inactivation is strongly accelerated by an increase in pressure corresponding -32 cm^3/mole of the activation volume at 30°. The activation enthalpy and the activation entropy are 8.2kcal./mole and -44 e. u. respectively, at 7500kg/cm^2 and pH 6.9. The rate of inactivation by pressure is also roughly proportional to hydrogen ion concentration in the solution at a pH between 4 and 10. These features of the inactivation by pressure of salivary α-amylase, resemble closely those of bacterial α-amylase.
Appears in Collections:Vol.35 No.1

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