| 用氧化水观点解释酶促过氧化氢歧化分解的反应机理 |
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| 引用本文： | 谭辉玲,魏泽英,杨明莉,何庆. 用氧化水观点解释酶促过氧化氢歧化分解的反应机理[J]. 重庆大学学报(自然科学版), 1997, 0(5) |
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| 作者姓名： | 谭辉玲 魏泽英 杨明莉 何庆 |
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| 作者单位： | 重庆大学化学化工学院 |
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| 摘 要： | 认为过氧化氢酶（ＥＣ１．１１．１．６）催化过氧化氢歧化分解反应的机理是：过氧化氢酶结合一分子Ｈ２Ｏ２形成化合物Ⅰ后，催化该Ｈ２Ｏ２异构化为一种氧化性能很强的Ｈ２Ｏ－Ｏ，然后，放出活性氧原子去氧化另一个Ｈ２Ｏ２分子产生２Ｈ２Ｏ和Ｏ２；并认为Ｈ２Ｏ２异构化为Ｈ２Ｏ－Ｏ是该总反应的控制环节。据此观点，进行了单分子反应理论ＲＲＫＭ计算，其结果和实验基本一致。
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| 关 键 词： | 过氧化氢；歧化反应；氧化水；过氧化氢酶；酶催化反应 |
A New Mechanism of Disproportionation Decomposition of H 2O 2 by Catalase Catalysis |
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| Tan Hailing Wei Zeying Yang Mingli He Qing. A New Mechanism of Disproportionation Decomposition of H 2O 2 by Catalase Catalysis[J]. Journal of Chongqing University(Natural Science Edition), 1997, 0(5) |
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| Authors: | Tan Hailing Wei Zeying Yang Mingli He Qing |
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| Affiliation: | Tan Hailing Wei Zeying Yang Mingli He Qing |
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| Abstract: | A new mechanism of disproportionation reaction for catalase catalytic decomposition of hydrogen peroxide is discussed,namely,isomerization of HOOH-H 2OO is accelerated by catalase catalysis and oxywater,H 2O-O,is produced,it is following step that another H 2O 2 is oxidized by the H 2O-O producing 2H 2O molecules,but O 2 molecule come of the H 2O 2.On the basis of the mechanism,the rate coefficients of H 2O 2 decomposition obtained by RRKM calculation are basically compatible with experimental values. |
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| Keywords: | hydrogen peroxide disproportionation reaction oxywater H 2O-O catalase catalysis |
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