Table 1.
Mean and standard deviation of OM score, H2S, CH3CH and (CH3)2S
| time(min.) | ||||||||||||
| baseline | just after rinsing | 30 | 60 | 90 | 120 | 150 | 180 | 210 | 240 | |||
| OM score | Exp. (n = 15) | mean (SD) | 2.10 (0.51) | 1.23** (0.32) | 1.20** (0.32) | 1.37** (0.40) | 1.33** (0.45) | 1.40** (0.39) | 1.46** (0.32) | 1.43** (0.42) | 1.47** (0.48) | 1.50** (0.42) |
| Cont. (n = 15) | mean (SD) | 1.87 (0.61) | 1.70 (0.53) | 1.90 (0.43) | 1.90 (0.60) | 2.00 (0.57) | 2.00 (0.53) | 2.11 (0.60) | 2.00 (0.50) | 2.03 (0.44) | 1.93 (0.50) | |
| H2S (ng/10ml) | Exp. (n = 15) | mean (SD) | 5.31 (4.89) | 0.12** (0.28) | 0.88** (1.28) | 1.62** (2.43) | 1.17** (1.11) | 1.29** (1.12) | 1.18** (0.84) | 1.72* (1.39) | 1.67** (1.05) | 1.84* (1.62) |
| Cont. (n = 15) | mean (SD) | 4.88 (6.61) | 3.70 (7.24) | 3.30 (3.83) | 3.34 (3.36) | 3.74 (3.89) | 4.79 (4.67) | 6.45 (8.36) | 4.99 (4.65) | 4.49 (4.65) | 6.77 (5.96) | |
| CH3SH (ng/10ml) | Exp. (n = 15) | mean (SD) | 1.42 (1.48) | 0.04** (0.08) | 0.14** (0.20) | 0.28** (0.31) | 0.27** (0.23) | 0.27** (0.24) | 0.21** (0.17) | 0.32* (0.28) | 0.30* (0.23) | 0.30* (0.28) |
| Cont. (n = 15) | mean (SD) | 1.21 (1.45) | 0.61* (0.81) | 0.80 (0.70) | 0.94 (0.79) | 1.07 (0.93) | 1.40 (1.28) | 1.78 (1.76) | 1.58 (1.49) | 1.45 (1.50) | 2.03* (1.51) | |
| (CH3)2S (ng/10ml) | Exp. (n = 15) | mean (SD) | 0.40 (0.27) | 0.02** (0.06) | 0.05** (0.20) | 0.10** (0.16) | 0.09** (0.13) | 0.12** (0.14) | 0.10** (0.12) | 0.12** (0.16) | 0.13** (0.12) | 0.10** (0.12) |
| Cont. (n = 15) | mean (SD) | 0.33 (0.33) | 0.22* (0.21) | 0.28 (0.26) | 0.29 (0.25) | 0.34* (0.30) | 0.46 (0.35) | 0.52 (0.39) | 0.43 (0.40) | 0.42 (0.38) | 0.53** (0.40) | |
OM, organoleptic measurement; H2S, hydrogen sulfide; CH3SH, methyl mercaptan; (CH3)2S, dimethyl sulfide; Exp., experimental group; Cont., control group; SD, standard deviation. *, p < 0.05; **, p < 0.01 conparision with the baseline (before rinsing) value. Paired t-test was used for statistical analysis.