Fig. 6: Schematic diagram of the sampling sites.

a The sampling sites of crust and crumb sample of baguette cross-section; (b) the sampling sites of the middle and two end parts of baguette; (c) the sampling sites of the middle cross-section of baguette (different numbers represent different sampling sites); (d) the sampling sites of two end cross-sections of baguette (different letters represent different sampling sites).