Fig. 1.

PCA bi-plot and dendrogram for volatile compounds pattern of hydrolysate of salmon by-product treated reducing sugars and thermal processing based on the part using E-nose. (A) PC1-2, (B) PC1-3, and (C) dendrogram. HXG head_thermal_xylose + glucose, HG head_thermal_glucose, HX head_thermal_xylose, HC head_thermal_control, HH head_hydrolysate, FXG frame_thermal_xylose + glucose, FG frame_thermal_glucose, FX frame_thermal_xylose, FC frame_thermal_control, FH frame_hydrolysate, SXG skin_thermal_xylose + glucose, SG skin_thermal_glucose, SX skin_thermal_xylose, SC skin_thermal_control, SH skin_hydrolysate, respectively