As shown in Fig 3D, FSW and USW extracts exhibited strong
hydroxyl radicals scavenging activity. For instance, at 0.24 mg/
ml, hydroxyl radicals scavenging effect of soy whey extracts
were above 90% regardless of the fermentation. Many studies
have reported that phenolics and isoflavones exhibit hydroxyl
radical scavenging activity (Chandrasekara & Shahidi,
2012; Singh et al., 2010). Chandrasekara and Shahidi (2012) reported
that phenolic compounds present in sample extracts
were effective ferrous ion chelating agents; hydroxyl radical
scavenging activity observed could be due to the direct scavenging
of hydroxyl radicals and/or chelating of ferrous ions
which are needed to generate hydroxyl radicals in the assay
system. Both FSW and USW extracts contained high amounts
of phenolics (Table 1), which were responsible for the strong
scavenging ability for hydroxyl radicals.
As shown in Fig 3D, FSW and USW extracts exhibited stronghydroxyl radicals scavenging activity. For instance, at 0.24 mg/ml, hydroxyl radicals scavenging effect of soy whey extractswere above 90% regardless of the fermentation. Many studieshave reported that phenolics and isoflavones exhibit hydroxylradical scavenging activity (Chandrasekara & Shahidi,2012; Singh et al., 2010). Chandrasekara and Shahidi (2012) reportedthat phenolic compounds present in sample extractswere effective ferrous ion chelating agents; hydroxyl radicalscavenging activity observed could be due to the direct scavengingof hydroxyl radicals and/or chelating of ferrous ionswhich are needed to generate hydroxyl radicals in the assaysystem. Both FSW and USW extracts contained high amountsof phenolics (Table 1), which were responsible for the strongscavenging ability for hydroxyl radicals.
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