Table 1.
Mean % content a of the metabolites (indicators) in the lipid fraction of milk samples. The p-value of the t-test is reported b,c.
| Metabolite | OR Samples | OP Samples | CR Samples | CP Samples |
|---|---|---|---|---|
| (9-cis, 11-trans) 18:2 CLA d | 0.49 ± 0.06 | 0.51 ± 0.06 | 0.30 ± 0.08 | 0.31 ± 0.03 |
| p-value b | 3.98 × 10−9 | |||
| p-value c | 2.56 × 10−11 | |||
| Caproleic acid | 0.25 ± 0.03 | 0.23 ± 0.02 | 0.32 ± 0.04 | 0.33 ± 0.03 |
| p-value b | 3.47 × 10−5 | |||
| p-value c | 4.72 × 10−12 | |||
| α-linolenic acid | 0.92 ± 0.08 | 0.88 ± 0.08 | 0.65 ± 0.06 | 0.61 ± 0.05 |
| p-value b | 4.32 × 10−18 | |||
| p-value c | 2.45 × 10−12 | |||
| Linoleic acid | 2.67 ± 0.35 | 2.66 ± 0.22 | 1.72 ± 0.24 | 1.73 ± 0.11 |
| p-value b | 1.12 × 10−15 | |||
| p-value c | 9.23 × 10−15 | |||
| –CH2–CH=CH– | 54.71 ± 2.68 | 54.47 ± 2.47 | 46.79 ± 3.45 | 47.98 ± 1.96 |
| p-value b | 9.38 × 10−9 | |||
| p-value c | 1.61 × 10−9 | |||
| UFA | 28.00 ± 1.19 | 28.07 ± 1.36 | 24.33 ± 1.75 | 24.32 ± 1.22 |
| p-value b | 7.48 × 10−8 | |||
| p-value c | 1.30 × 10−8 |
a Expressed as (mean value) ± SD. b Comparison between organic raw (OR) and conventional raw (CR) samples. c Comparison between organic processed (OP) and conventional processed (CP) a samples. d The contribution of the H10 resonance of the (10-trans, 12-cis) 18:2 CLA positional isomer at δ = 6.28 ppm [43] and of the H10 resonance of the (9-trans, 11-cis) 18:2 CLA isomer at 6.29 ppm [44] was found to be of minor importance.