【摘要】 本文对荔枝壳中多酚氧化酶(PPO)的活性及不同抑制剂的抑制效果进行研究。结果表明:荔枝壳多酚氧化酶的最佳底物浓度为0.04mol/L,最适pH为7.0,最适温度为40℃;柠檬酸、抗坏血酸、硫代硫酸钠对PPO活性表现出较好的抑制效果,三种抑制剂联合作用的最佳条件为0.01mmol/L的柠檬酸+0.04mmol/L的抗坏血酸+0.004mmol/L的硫代硫酸钠,PPO活性的抑制率达85.8%。更多还原

【Abstract】 The activity of PPO of lichi hull and the control effect for different inhibitor were studied in this paper. The result showed that the fine substrate consistence was 0.04mol/L, the proper pH was 7.0, the optimum temperature was 40℃ for PPO of lichi hull;citric acid, ascorbic acid,hyposulphite display better inhibition effect on PPO activity. The optimum inhibition condition was 0.05mmol/L citric acid add 0.2mmol/L ascorbic acid add 0.02mmol/L hyposulphite, the PPO residual activity was 14.2%.更多还原