Use of high hydrostatic pressure (HHP) to obtain an ingredient rich in bioactive compounds from cv. Tempranillo red pomace

Open Access

Table 1

Effect of the HHP treatments on Microbial counts (log colony forming units, CFU g-1) and Polyphenoloxidase activity (percentage of activity with respect to the control samples) on red grape pomace (RGP) cv. Tempranillo.

	Control	HHP-1	HHP-2	HHP-3	HHP-4	p
Mesophilics	2.95	2.67	2.64	2.63	2.45	ns
Molds and yeasts	2.03A	<1.00B	<1.00B	<1.00B	<1.00B	*
Enterobacteriae	2.12A	<1.00B	<1.00B	1.16AB	1.20AB	*
PPO	103.3	125.0	145.8	151.7	139.2	ns

HHP1: 600 MPa/1s; HHP2: 600 MPa/300s; HHP3: 600 MPa/1s (2 cycles); HHP4 cycles (b): 400 MPa/1s (first cycle) / 600 MPa/1s (second cycle).

Means values with different superscript numbers in the same row and different letters in the same column indicate significant difference by the Tukey test (p < 0.05).

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