Table 1.
Physicochemical and bioactive compounds and antioxidant activity of oil from pomegranate seeds blanched for 3 min as a function of blanching temperature.
Blanching Temperature (°C) | Oil Yield (%) | YI | K232 | K270 | RI | TCC | TPC | DPPH |
---|---|---|---|---|---|---|---|---|
Unblanched | 13.70 ± 0.10 c | 83.86 ± 0.13 a | 0.14 ± 0.01 c | 0.13 ± 0.02 c | 1.5215 ± 0.00 a | 30.12 ± 1.07 a | 3.41 ± 0.05 a | 4.06 ± 0.11 c |
80 | 15.80 ± 0.60 b | 65.47 ± 0.30 c | 0.41 ± 0.02b b | 0.48 ± 0.02 b | 1.5218 ± 0.00 a | 28.74 ± 1.07 a | 3.03 ± 0.17 c | 4.32 ± 0.05 ab |
90 | 18.55 ± 0.55 a | 67.04 ± 0.06 b | 0.32 ± 0.04 a | 0.41 ± 0.01 a | 1.5218 ± 0.00 a | 26.79 ± 1.12 a | 4.04 ± 0.08 d | 4.41 ± 0.07 b |
100 | 14.20 ± 0.20 bc | 91.52 ± 0.16 d | 0.16 ± 0.00 c | 0.15 ± 0.02 c | 1.5217 ± 0.00 a | 27.74 ± 0.10 a | 2.01 ± 0.07 b | 4.13 ± 0.03 ac |
Values are means ± SE of triplicate determinations. Means in the same column and followed by different letters are significantly different (p < 0.05) according to Duncan’s multiple range test. RI = Refractive index (25 °C), YI = Yellowness index, K232 = Conjugated dienes, K270 = Conjugated trienes, TCC = Total carotenoids content (mg β-carotene/100 g PSO), TPC = Total phenolic content (mg GAE/g PSO), DPPH = 2.2-Diphenyl-1-picryl hydrazyl (mmol Trolox/g PSO), GAE = Gallic acid equivalence, PSO = Pomegranate seed oil.