Table 2.
Pasting and thermal characteristics of OSA rice starches using a rapid visco-analyzer and differential scanning calorimeter.
| OSA Substitution of Rice Starches | Pasting Temp. (°C) | Viscosity (RVU) | DSC | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Peak (P) |
Final (F) |
Breakdown (P-T) |
Setback (F-T) |
To (°C) | Tp (°) | Tc (°C) | ∆H (J/g) | ||
| Hopyeong 0% | 83.74 ± 0.62 a | 144.42 ± 0.47 d | 217.79 ± 7.48 d | 42.42 ± 1.30 d | 115.79 ± 8.31 b | 60.70 ± 0.19 a | 67.65 ± 0.12 a | 73.50 ± 0.18 a | 7.50 ± 076 a |
| Hopyeong 1% | 72.32 ± 0.05 b | 245.63 ± 1.83 c | 254.08 ± 1.41 c | 109.88 ± 2.06 c | 118.33 ± 1.18 b | 60.01 ± 0.40 a | 67.12 ± 0.14 b | 73.74 ± 0.18 a | 6.89 ± 0.36 a |
| Hopyeong 2% | 70.10 ± 0.59 c | 325.29 ± 1.00 b | 269.00 ± 0.12 b | 183.21 ± 0.77 b | 126.92 ± 0.12 ab | 59.09 ± 0.01 b | 66.73 ± 0.00 c | 73.86 ± 0.05 a | 6.65 ± 0.23 a |
| Hopyeong 3% | 68.75 ± 0.08 d | 393.29 ± 1.24 a | 280.42 ± 2.47 a | 247.33 ± 1.53 a | 134.46 ± 2.18 a | 58.06 ± 0.22 c | 66.12 ± 0.10 d | 73.69 ± 0.33 a | 7.35 ± 0.64 a |
| Sinseonchal 0% | 71.81 ± 0.21 a* | 279.92 ± 2.83 d* | 193.00 ± 0.59 d | 97.92 ± 3.06 d* | 11.00 ± 0.83 c* | 65.20 ± 0.06 a* | 70.96 ± 0.09 a* | 81.03 ± 3.17 a | 11.99 ± 3.16 a |
| Sinseonchal 1% | 71.00 ± 0.08 b* | 334.67 ± 2.59 c* | 208.92 ± 0.94 c* | 153.50 ± 3.77 b* | 27.75 ± 5.42 ab* | 61.74 ± 0.01 a | 67.78 ± 0.13 b* | 77.02 ± 0.67 a | 8.60 ± 0.40 a * |
| Sinseonchal 2% | 70.98 ± 0.32 b | 352.46 ± 0.53 b* | 255.83 ± 0.71 b* | 125.75 ± 1.41 c* | 29.12 ± 1.59 a* | 59.42 ± 2.57 a | 66.27 ± 1.58 b | 76.30 ± 0.79 a | 7.66 ± 1.32 a |
| Sinseonchal 3% | 66.13 ± 0.21 c* | 492.96 ± 8.54 a* | 282.25 ± 4.01 a | 226.75 ± 5.66 a | 16.04 ± 6.89 bc* | 60.05 ± 1.52 a | 66.30 ± 1.28 b | 74.98 ± 1.16 a | 8.36 ± 0.02 a |
Data represent as the mean ± SD; a–d Values accompanied in the same rice starch with different substitution ratios of OSA significantly differ (p < 0.05) by Duncan’s multiple range test; * Significantly different between Hopyeong and Sinseonchal with same substitution ratios of OSA by t-test (* p < 0.05); 1%, 2%, and 3% refer to the substitution percentages of octenyl succinic anhydride modification of rice.