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PCA analysis (A), the loading plot (B), the bi-plot results (C) and heatmap analysis (D) of aroma components in maize porridge prepared in 3 kinds of cookers with different cooking time, EPC: Maize porridge prepared in the electric pressure cooker; EC: Maize porridge prepared in the electromagnetic oven; IC: Maize porridge prepared in the electric rice cooker; UR: Uncooked maize.
