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. 2022 Dec 27;12(1):135. doi: 10.3390/foods12010135

Table 5.

Isothermal assessment of 120, 140, and 160 °C temperature programs using differential scanning calorimetry for cold-pressed hemp seed oils.

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).