-95 



26 The Concentration-related Inhibitory Effect of Kojic Acid 



on the Oxidation of L-DOPA and Catechol by White Shrimp 



PPO 119 



27 The Concentration-related Inhibitory Effect of Kojic Acid 



on the Oxidation of DL-DOPA and Catechol by Grass Prawn 



PPO 121 



28 The Concentration-related Inhibitory Effect of Kojic Acid 



on the Oxidation of DL-DOPA and Catechol by Lobster PPO. 123 



29 Effect of Kojic Acid on the Hydroxylation of Monohydroxy- 



phenol by Mushroom Tyrosinase (PPO) 133 



30 Effect of Kojic Acid on Reduction of Cu^"^ to Cu* in a 



Model System 137 



31 Change in Absorption Spectra of Dopaquinone due to the 



Addition of Kojic Acid, (a) Dopaquinone Produced from 



the Action of Mushroom PPO on DL-DOPA; and 



(b) Dopaquinone Plus Kojic Acid 139 



32 Apparatus Used for Studying Polyphenol Oxidase (PPO) 



Inactivation by High Pressure CO^ 149 



33 Effect of Carbon Dioxide (1 atm) on the Change in pH and 



Enzyme Activity of Florida Spiny Lobster PPO Heated at 



33° (a), 38° (b), or 43°C (c) 156 



34 Effect of High Pressure (58 atm) Carbon Dioxide on the 



Change in pH and Enzyme Activity of Florida Spiny 



Lobster PPO heated at 43°C 161 



35 Effect of High Pressure (58 atm) Carbon Dioxide on the 



Change in pH and Enzyme Activity of Brown Shrimp PPO 



heated at 43°C 163 



36 Effect of High Pressure (58 atm) Carbon Dioxide on the 



Change in pH and Enzyme Activity of Potato PPO heated at 

 43°C 165 



37 Nondenaturing Pol yacryl amide Gel Electrophoresis (PAGE, 



7.5% Gel) Profile of Carbon Dioxide (1 atm)-treated 



Florida Spiny Lobster PPO 170 



38 Sodium Dodecyl Sulfate Polyacryl amide Gel Electrophoresis 



(SDS-PAGE, 7.5% Gel) Profile of High Pressure (58 atm) 

 Carbon Dioxide-treated Florida Spiny Lobster PPO .... 174 



