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. 2021 Dec 8;10(12):3053. doi: 10.3390/foods10123053

Figure 1.

Figure 1

The determination of membrane permeability of sample after different treatments by propidium iodide (PI) uptake method. The results were presented in cross quadrant images. (a) and (A), untreated sample and sample with single 1/2 MIC PCA treatment (1.25 mg/mL for 60 min at 37 °C), respectively; (b) to (d) and (B) to (D), HHP group and PCA + HHP group samples with 100, 300, 500 MPa pressure treatments for 5 min, respectively. Percentage of cells in each quadrant was labelled on the top right-hand corner. UL, upper left region; UR, upper right region; LL, lower left region; LR, lower right region. The vertical axis and abscissa axis represented the relative fluorescence intensity at 488 nm and 530 nm.