结果表明：在桃果实成熟及采后贮藏过程中产生的超氧化物自由基和H_2O_2含量与乙烯释放量呈一定相关性。

The results showed that the content of superoxide radical and H_2O_2 formed during peach ripening and storage were related to ethylene biosynthesis.

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超氧化物歧化酶(SOD)是氧自由基的清除剂。

Superoxide dismutase (SOD) is the scavenger of oxygen free radicals.

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目的：测定TIPSS前后犬肝组织丙二醛（MDA）和犬静脉血超氧化物歧化酶（SOD）的变化，分析TIPSS术后氧自由基变化与肝性脑病的关系。

Objective:To study the relationship between free radical and hepatic encephalopathy after TIPSS by examing MDA in hepatic tissue and SOD in blood.

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