Table 1.

Evolution of the physicochemical parameters of olives pressurized or not (control) at 400, 450, or 500 MPa for 15 or 30 min and stored at 20°C for 7 days.

Pressure (MPa)	Processing time (min)	Colour
		L* value		a* value		b* value
		0 days	7 days	0 days	7 days	0 days	7 days
Control (unpressurized)	—	53.95 ± 2.44a,x	54.71 ± 1.64a,x	−4.17 ± 0.70a,x	−4.43 ± 1.01a,x	31.53 ± 2.67a,x	32.54 ± 2.29a,x
400	15	53.84 ± 2.50a,x	53.02 ± 1.81b,x	−4.66 ± 0.66a,x	−4.17 ± 0.74a,b,x	31.50 ± 2.86a,x	29.89 ± 2.02b,y
	30	53.97 ± 1.45a,x	51.87 ± 1.70b,c,y	−4.58 ± 0.66a,x	−3.86 ± 0.76b,c,y	30.55 ± 2.22b,x	29.25 ± 1.93b,x
450	15	54.28 ± 3.09a,x	51.95 ± 1.89b,c,y	−3.96 ± 0.71a,x	−3.28 ± 0.87c,y	31.59 ± 3.76a,x	29.44 ± 1.83b,y
	30	53.85 ± 3.46a,x	52.75 ± 1.97b,c,x,y	−3.90 ± 0.68a,x	−3.23 ± 0.79c,y	30.89 ± 3.25b,x	29.66 ± 1.75b,y
500	15	53.12 ± 2.58a,x	51.91 ± 2.04b,c,y	−4.34 ± 0.65a,x	−3.39 ± 0.61c,y	31.23 ± 2.36a,x	30.08 ± 1.72b,y
	30	52.01 ± 3.07b,x	50.71 ± 2.77b,c,y	−4.22 ± 1.26a,x	−3.13 ± 0.44c,y	30.79 ± 2.17b,x	30.22 ± 1.30b,x
		Firmness (Nt)		pH
				Brine		Olives
		0 days	7 days	0 days	7 days	0 days	7 days
Control (unpressurized)	—	4.24 ± 0.94a,x	4.42 ± 1.08a,x	3.97 ± 0.07a,x	3.99 ± 0.08a,x	4.12 ± 0.08a,x	4.10 ± 0.08a,x
400	15	4.23 ± 0.91a,x	4.15 ± 1.48a,x	3.99 ± 0.04a,x	4.02 ± 0.06a,x	4.14 ± 0.06a,x	4.11 ± 0.04a,x
	30	4.89 ± 1.03a,x	4.14 ± 1.42a,x	3.88 ± 0.16a,x	4.09 ± 0.06a,x	4.18 ± 0.01a,x	4.16 ± 0.01a,x
450	15	4.50 ± 0.85a,x	4.61 ± 1.08a,x	3.90 ± 0.01a,x	3.87 ± 0.04a,x	4.01 ± 0.15a,x	4.04 ± 0.03a,x
	30	4.92 ± 0.91a,x	4.94 ± 0.97a,x	3.93 ± 0.01a,x	3.90 ± 0.01a,x	4.11 ± 0.09a,x	4.04 ± 0.00a,x
500	15	4.25 ± 1.05a,x	4.07 ± 1.12a,x	4.04 ± 0.09a,x	4.04 ± 0.07a,x	4.12 ± 0.06a,x	4.10 ± 0.09a,x
	30	4.75 ± 1.29a,x	4.77 ± 1.17a,x	4.07 ± 0.04a,x	4.02 ± 0.02a,x	4.15 ± 0.02a,x	4.12 ± 0.04a,x

^a,b,cDifferent letters within the same column indicate significant differences between different treatments at the specific storage time (P < 0.05).

^x,yDifferent letters within the same row indicate significant differences between 0th and 7th day at the same treatment (P < 0.05).