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zhongyuxian

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[交流] 乙醇和丙酮对多酚氧化酶的活性有什么影响

乙醇和丙酮等有机溶剂对多酚氧化酶的活性有什么影响
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qiaqia832

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4楼: Originally posted by zhongyuxian at 2012-04-27 17:18:23:
是研究酶的特性的

给你个参考:
PPO activity decreased as the ethanol concentration was in-creased. At an ethanol concentration of 10%, the enzyme lost 30% of its activity, at a 20% ethanol concentration, the loss in activity of PPO was almost 90% and at a concentration of 30% ethanol, the enzyme activity was completely inhibited. A decrease in enzy-matic activity in the presence of ethanol has previously been re-ported for bromelain (total inhibition at 50% ethanol) ( Hasan, Rasheedi, & Khatun, 2003 ).

[ Last edited by qiaqia832 on 2012-4-27 at 20:04 ]
5楼2012-04-27 20:03:12
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shinepolaris

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zhongyuxian(金币+1): 谢谢参与
降低蛋白活性吧,因为蛋白在有机溶剂里会变性啊
2楼2012-04-26 22:28:43
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qiaqia832

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zhongyuxian(金币+1): 谢谢参与
都会降低酶活性的,你是研究酶的特性还是单纯钝化PPO呢,丙酮也用来提取PPO,乙醇浓度高会抑制酶活性
3楼2012-04-27 08:30:55
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zhongyuxian

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3楼: Originally posted by qiaqia832 at 2012-04-27 08:30:55:
都会降低酶活性的,你是研究酶的特性还是单纯钝化PPO呢,丙酮也用来提取PPO,乙醇浓度高会抑制酶活性

是研究酶的特性的
4楼2012-04-27 17:18:23
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