rate of the control slices were 1.43 times high of that in treatment with 15llL1 H2S. Slices treatedwith 15 llL1 H2S showedsignif- icantly lower H2O2 content during storage than those of other treatments as shown in Fig. 2C( P <0.05).3.3. Effects of H2S on antioxidant capacityAs shown in Fig. 3A, DPPH radical scavenging ability increased in the first 6 days and decreased later. Treatment with 15 llL1 H2S significantly enhanced DPPH radical scavenging ability than that of the control during storage (P < 0.05). DPPH radical scaveng- ing ability of slices treated with 15llL1 H2S was 1.32 times high of the control at day 6. ABTS radical scavenging activity decreased duringstoragetime(Fig.3B).Treatmentwith15llL1 H2Sshowedsignificantly higher ABTS radical scavenging activity than the con- trol (P < 0.05). Similar with DPPH radical scavenging ability, the reducing power increased in the first 6 days and decreased after- wards (Fig. 3C). Treatment with 15llL1 H2S showed significantly higher reducing power than the control (P <0.05).3.4. Effects of H2S on phenol metabolismPAL activity increased substantially in slices treated with 15llL1 H2S and the control in the first 6 days of storage and then decreased (Fig. 4A). Treatment with 15llL1 H2S promoted a sig- nificant increase in PAL activity (P <0.05). CAT activity decreased in all the fresh-cut lotus root slices during storage (Fig. 4B). CAT
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