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The effects of supercritical carbon dioxide (ScCO 2 ) treatment and high hydrostatic pressure treatment on the activities of lipoxygenase (LOX) and peroxidase (POD) were studied. Hydrostatic pressure treatment (240 MPa, 55°C, 15 min) of LOX and POD in 30% sucrose solutions without buffer led to approximately 80% and approximately 50% residual activity, respectively. Application of ScCO 2 (35.2 MPa, 40°C, 15 min for LOX and 62.1 MPa, 55°C, 15 min for POD) achieved approximately 35% LOX and approximately 65% POD inactivity in 30 % sucrose solutions. Total inactivation of LOX (10.3 MPa, 50°C and 15 min) and of POD (62.1 MPa, 55°C and 15 min) could be achieved through ScCO 2 treatment of unbuffered solution. Increasing the concentration of sucrose and buffering (pH range 4 to 9) of enzyme solutions resulted in increased resistance of the enzymes to ScCO 2 treatment.

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