Bearing that in mind, phenolic extracts of the control rice bran
and fermented rice bran were evaluated for their ability to inhibit
polyphenol oxidase and peroxidase enzymes. The antioxidant solutions
showed greater inhibition of the peroxidase enzyme, with the
solutions of ferulic acid and from fermented and unfermented rice
bran showing a similar inhibitory power, reaching close to 60%
inhibition when was used a concentration of about three times
the value of their EC50 (approximately 0.1 mg/ml) was used (Fig. 3).
The polyphenol oxidase was not inhibited at any concentration
of antioxidant solutions from fermented and unfermented (control)
rice bran extracts, while the solution of ferulic acid showed
greater inhibition power at a concentration corresponding to three