Fig. 4. Interactions and mean plots with LSD intervals. A: interactions between the fat replacement level and the improver incorporation for cake volume. B: interactions between the fat replacement level and the improver incorporation for total cell area within the crumb. C and D: mean values for the cell area according to the improver incorporation and the fat replacement level, respectively. E: interactions between the fat replacement level and the improver incorporation for the circularity of cells. Improver incorporation (g/100 g of flour): 0 (none), L1 (lipase 0.003 g/100 g), L2 (lipase 0.006 g/100 g), E1 (emulsifier 0.5 g/100 g), E2 (emulsifier 1 g/100 g)