Table 5.
DSC Isothermal Parameters | Henola Cultivar Oil Samples | |||||
---|---|---|---|---|---|---|
Group 1 | Group 2 | |||||
HL_18A | HL_18B | HL_19A | HL_19B | HL_19C | ||
Isothermal 120 °C | OIT (min) | 48.22 b ± 1.30 | 41.89 a ± 0.90 | 48.49 b ± 0.50 | 41.95 a ± 0.00 | 58.18 c ± 0.63 |
OET (min) | 70.76 b ± 1.40 | 67.05 ab ± 1.85 | 65.43 ab ± 0.06 | 60.13 a ± 4.04 | 80.88 c ± 1.00 | |
Δt (min) | 22.53 ab ± 0.10 | 25.17 b ± 0.95 | 16.94 a ± 0.56 | 18.19 ab ± 4.05 | 22.70 ab ± 0.37 | |
Rate of oxidation (W/g min) |
0.02 ab ± 0.00 | 0.02 a ± 0.00 | 0.02 bc ± 0.00 | 0.03 c ± 0.00 | 0.02 a ± 0.00 | |
Isothermal 140 °C | OIT (min) | 9.33 a ± 0.06 | 9.44 a ± 0.56 | 10.15 a ± 0.05 | 9.39 a ± 0.23 | 14.99 b ± 1.05 |
OET (min) | 21.36 a ± 0.06 | 21.74 a ± 0.58 | 23.85 b ± 0.03 | 21.17 a ± 0.4 | 27.4 c ± 0.34 | |
Δt (min) | 12.03 a ± 0.00 | 12.30 a ± 0.01 | 12.91 a ± 0.08 | 11.78 a ± 0.62 | 12.41 a ± 1.39 | |
Rate of oxidation (W/g min) |
0.06 a ± 0.00 | 0.06 a ± 0.00 | 0.06 a ± 0.00 | 0.05 ab ± 0.02 | 0.07 b ± 0.01 | |
Isothermal 160 °C | OIT (min) | 0.6 b ± 0.06 | 0.08 a ± 0.01 | 0.84 c ± 0.01 | 0.98 cd ± 0.05 | 1.13 d ± 0.05 |
OET (min) | 7.68 ab ± 0.09 | 6.71 a ± 0.13 | 7.76 ab ± 0.55 | 8.56 ab ± 0.63 | 9.38 b ± 0.99 | |
Δt (min) | 7.07 a ± 0.16 | 6.62 a ± 0.14 | 6.92 a ± 0.54 | 7.57 a ± 0.68 | 8.26 a ± 1.05 | |
Rate of oxidation (W/g min) |
0.14 a ± 0.00 | 0.15 a ± 0.00 | 0.17 a ± 0.04 | 0.15 a ± 0.02 | 0.14 a ± 0.03 |
abcd—different superscript letters within rows indicate significant differences (p ≤ 0.05). OIT—Oxidation induction time, OET—oxidation end time, Δt—Length of oxidation. Group 1 oils (HL_18A, HL_18B) and group 2 oils (HL_19A, HL_19B, HL_19C).