热处理对苹果果胶甲酯酶和多酚氧化酶活性影响 Effect of thermal treatment on the activity of apple pectin methylesterase and polyphenoloxidase 廖小军 徐增慧 智先--维普资讯网 : 研究了添加抗坏血酸对苹果浊汁中果胶甲酯酶（pectin methylesterase，PME）和多酚氧化酶活性（polyphenoloxidase，PPO）热钝化效果影响以及分析了PME热钝化动力学，结果表明，添加0．1％抗坏血酸（ascorbic aci
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...om 要： 研究了添加抗坏血酸对苹果浊汁中果胶甲酯酶（pectin methylesterase，PME）和多酚氧化酶活性（polyphenoloxidase，PPO）热钝化效果影响以及分析了PME热钝化动力学，结果表明，添加0．1％抗坏血酸（ascorbic aci...
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随着土壤深度增加，土壤过氧化氢酶和多酚氧化酶活性增大，而脲酶活性降低。
Totally, soil catalase and polyphenol oxidase activity increased, while soil urease activity declined in deeper soil, the extent were different among temperatures and litter types.
纯化后的酶液经聚丙烯酰胺凝胶电泳，分别采用银染色和多酚氧化酶活性染色均显示一条电泳带。
The result from polyacrylamide gel electrophoresis of purified enzyme indicated that only one band was found using silver stain and PPO activity stain, respectively.
甘蔗在贮藏过程中蔗糖转化酶和多酚氧化酶活性不断提高，滴定酸、酒精和还原糖含量逐渐增加，而蔗糖和可溶性总糖含量逐渐减少。
During storage, activities of sucrose invertases and PPO increased gradually, titratable acid, alcohol and reducing sugar contents increased, while sucrose and soluble sugar contents decreased.
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