Huanggang Normal Universiyt;
Huanggang 438000;
China;
Hubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive Utilization;
Huanggang 438000;
China;
Hubei Zhongke Research Institute of Industrial Technology;
Huanggang 438000;
China;
Polyphenol oxidase; Immobilized enzyme; Sodium alginate; Enzymatic properties; Kinetic parameter;