. 2022 Oct 5;8(10):e10969. doi: 10.1016/j.heliyon.2022.e10969

Table 2.

- Decrease (mean value ±standard deviation, n = 3) of pH of MRS broth inoculated at 1% with a culture of Li. reuteri DSM 17938 previously treated by ultrasound at different conditions.

Ultrasound treatments	Time of incubation at 37 °C
Ultrasound treatments	6 h	24 h
57 W for 4 min	0.63 ± 0.18^a	2.04 ± 0.04^a
64 W for 4 min	0.73 ± 0.08^a	2.01 ± 0.08^a
78 W for 4 min	0.25 ± 0.06^b	2.10 ± 0.16^a
57 W for 6 min	0.08 ± 0.03^a	2.04 ± 0.03^a
64 W for 6 min	0.03 ± 0.01^a	2.03 ± 0.08^a
78 W for 6 min	0.00 ± 0.01^a	2.06 ± 0.13^a

Different letters, within the same time of incubation and treatment, indicate a significant difference between mean values as determined by T-test (P < 0.05).