Table 5.
Compositional details of beetroot powder under varying drying condition and slice thickness.
| Drying parameter | Slice thickness (mm) | Fibre (%) | Fat (%) | Protein (%) | Ash (%) | Carbohydrate (%) | Energy (kcal) | |
|---|---|---|---|---|---|---|---|---|
| Power level (W) | Vacuum (mm Hg) | |||||||
| Microwave vacuum drying | ||||||||
| 160 | 710 | 1 | 1.49 ± 0.02ᶜ | 1.10 ± 0.12ᵇ | 7.63 ± 0.09ᶜ | 4.47 ± 0.33ᶜ | 82.88 ± 0.36ᵃ | 371.98 ± 2.13ᵃ |
| 320 | 710 | 1 | 1.41 ± 0.01ᶜ | 0.87 ± 0.02ᶜ | 7.05 ± 0.05ᵈ | 5.13 ± 0.03ᵇ | 83.77 ± 0.05ᵃ | 371.16 ± 0.17ᵃ |
| 160 | 660 | 1 | 1.69 ± 0.08ᵇ | 1.82 ± 0.02ᵃ | 8.89 ± 0.13ᵇ | 6.92 ± 0.04ᵇ | 79.03 ± 0.14ᵇ | 368.04 ± 0.27ᵇ |
| 320 | 660 | 1 | 1.65 ± 0.25ᵇ | 1.30 ± 0.01ᵇ | 7.85 ± 0.03ᶜ | 6.70 ± 0.10ᵇ | 81.08 ± 0.12ᵃ | 367.45 ± 0.27ᵇ |
| 160 | 610 | 1 | 2.08 ± 0.09ᵃ | 2.01 ± 0.01ᵃ | 10.63 ± 0.20ᵃ | 8.09 ± 0.10ᵃ | 74.47 ± 0.49ᶜ | 358.43 ± 1.27ᶜ |
| 320 | 610 | 1 | 1.82 ± 0.35ᵇ | 1.61 ± 0.37ᵇ | 8.73 ± 0.53ᵇ | 8.08 ± 0.02ᵃ | 77.09 ± 0.15ᵇ | 357.74 ± 1.90ᶜ |
| 160 | 710 | 2 | 1.61 ± 0.03ᶜ | 1.62 ± 0.22ᵇ | 7.80 ± 0.58ᶜ | 6.19 ± 0.04ᵇ | 80.29 ± 0.07ᵃ | 366.97 ± 4.49ᵃ |
| 320 | 710 | 2 | 1.50 ± 0.02ᶜ | 0.97 ± 0.03ᶜ | 7.34 ± 0.02ᶜ | 5.82 ± 0.41ᵇ | 82.78 ± 0.38ᵃ | 369.20 ± 1.71ᵃ |
| 160 | 660 | 2 | 1.86 ± 0.06ᵇ | 1.79 ± 0.02ᵃ | 10.21 ± 0.01ᵃ | 7.19 ± 0.06ᵃ | 76.63 ± 2.36ᵇ | 363.43 ± 9.42ᵇ |
| 320 | 660 | 2 | 1.64 ± 0.03ᵇ | 1.44 ± 0.03ᵇ | 8.47 ± 0.02ᵇ | 7.13 ± 0.97ᵃ | 78.47 ± 0.31ᵇ | 360.69 ± 1.38ᵇ |
| 160 | 610 | 2 | 2.37 ± 0.05ᵃ | 2.30 ± 0.02ᵃ | 11.86 ± 0.03ᵃ | 8.26 ± 0.12ᵃ | 72.99 ± 0.20ᶜ | 360.09 ± 0.55ᵇ |
| 320 | 610 | 2 | 2.26 ± 0.05ᵃ | 1.84 ± 0.07ᵇ | 9.48 ± 0.27ᵇ | 8.47 ± 0.14ᵃ | 75.99 ± 0.27ᵇ | 358.41 ± 0.38ᵇ |
| Freeze drying (0.062 mbar, −40 °C) | 1 | 1.85 ± 0.02ᵇ | 1.44 ± 0.27ᵇ | 10.16 ± 0.43ᵃ | 7.69 ± 0.27ᵃ | 76.49 ± 0.44ᵇ | 359.54 ± 2.34ᶜ | |
| 2 | 2.11 ± 0.08ᵃ | 1.38 ± 0.12ᵇ | 9.84 ± 0.63ᵇ | 8.26 ± 0.12ᵃ | 75.28 ± 0.42ᵇ | 352.87 ± 0.44ᶜ | ||
Different superscript small letters in each column denote significant difference at p ≤ 0.05.