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Table 3 Comparison of D-isoascorbyl palmitate conversion performance between ultrasound and mechanical shaking conditions

From: Ultrasound-assisted lipase-catalyzed synthesis of D-isoascorbyl palmitate: process optimization and Kinetic evaluation

Items Ultrasound Mechanical shaking
Reaction time (h) 6 24
Temperature (°C) 61 53
Substrate molar ratio (D-isoascorbic: palmitic acid) 1:5 1:4
Enzyme load (w/w) 9% 20%
Conversion (%) 94.32 95.32
Productivity (g L-1 h-1) 8.67 2.19
Conversion after enzyme reuse (8 cycles) 40 15.02
Apparent maximum reaction rate (vmax) (mMh-1) 25.64 9.01