Table 5

Physicochemical characterization of untoasted kernels and fractions obtained after electrostatic sorting or turbo-separation of U-RSM and U-SFM (from Laguna et al., 2018).

U-RSM-0.1 U-SFM-0.5

Separation process ES TS U-kernel ES TS U-kernel
Fraction PFe FF§ PFe FF§
TSPC* 25.8 ± 0.1a 21.4 ± 0.3b 20.3 ± 0.6b 45.8 ± 1.1a 39.9 ± 1.1b 41.5 ± 0.7b
Protein content (% DDM) 59.1 ± 0.4c 48.7 ± 0.4d 48.3 ± 1.4d 61.7 ± 0.0c 51.2 ± 0.0d 52.6 ± 1.8d
Overall recovery Yield (% m/m) 31.0 40.7 ± 0.6 32.0 30.0

Note: ES = electrostatic sorting, TS = turbo-separation, TSPC: total simple phenolic compounds, U-kernels = untoasted kernels, PFe = positive fraction of the electrode, FF = fine fraction. *: TSPC was expressed in mg of sinapic acid equivalent (SAE)/g of defatted dry matter (DDM) and mg of chlorogenic acid equivalent (CAE)/g DDM for U-RSM and U-SFM respectively. §: Fine fraction (FF) recovered at 5000 rpm. For each raw material, values followed by same superscript letters are not significantly different, p ≤ 0.05. Values are means ± SD (n = 3).

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