. 2021 Apr 2;7(4):e06632. doi: 10.1016/j.heliyon.2021.e06632

Table 4.

Effect of processing on the residual activity of polyphenol oxidase and peroxidase in sweet potato juice.

Process	Polyphenol oxidase residual activity (%)	Peroxidase residual activity (%)
Control	100.0 ± 00^a	100.0 ± 00^a
Ultrasound	98.7 ± 3.2^a	97.8 ± 3.0^a
Steam	108.4 ± 6.4^b	108.1 ± 7.8^b
Steam + Ultrasound	92.0 ± 5.1^a	104.5 ± 7.9^ab

Mean ± standard deviation followed by different superscript letter in the same column indicate that values are significantly different (p < 0.05.) by Tukey's test.