草菇在贮藏过程中表现出多酚氧化酶(ppo)活性与褐变程度不一致的现象，这主要是由于PPO与底物区域化分布的结果。
The results also showed that the PPO activity of the straw mushroom failed to correspond with the Browning as a result of compartmentation of polyphenol oxidase and its substrates.
多酚氧化酶活性测定是用邻甲氧基苯酚为底物，用分光光度法测定。
Taken O-Methoxyphenol as the substrate, the polyphenol oxidase activity was determined by the spectrophotometry.
第一部分主要研究了柿子酶促褐变的底物和参与柿子酶促褐变的多酚氧化酶和过氧化物酶的特性。
The substrate of persimmon enzymatic Browning and the characteristics of polyphenol oxidase and peroxidase participate in persimmon enzymatic Browning were researched in part one.
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