Table 1 Expansion index, specific length and piece density of extruded soy protein isolate with different moisture content and CO2 gas injection
| Moisture content (%) | CO2 gas injection (mL/min) | Expansion ratio | Specific length (m/kg) | Piece density (g/cm³) |
| 40 | 0 | 1.25±0.09c1) | 73.77±4.18d | 0.60±0.07b |
| 800 | 1.50±0.08a | 76.88±4.37d | 0.58±0.07b |
| 50 | 0 | 1.29±0.06bc | 82.99±7.17c | 0.66±0.05ab |
| 800 | 1.34±0.03b | 84.70±5.89c | 0.55±0.10b |
| 60 | 0 | 1.16±0.06d | 108.48±7.46a | 0.62±0.07b |
| 800 | 0.94±0.06e | 95.77±4.98b | 0.74±0.08a |
Means with different letters within a column are significantly different (p<0.05) by Duncan’s multiple range test.