Using slow freezing and liquid nitrogen quick freezer by the fashion of spray and flowed state, the effect of freezing temperature and rate on polyphenoloxidase(PPO) and peroxidase(POD) activity in Boletus aereus were studied.

• 采用喷雾式流态化液氮速冻及缓冻,研究了冻结温度、速度对黑牛肝菌多酚氧化酶(PPO)及过氧化物酶(POD)活性的影响。