. 2018 Mar 13;31(8):1336–1344. doi: 10.5713/ajas.17.0677

Table 2.

Effects of high pressure processing and vacuum aging on volatile compounds of grass-fed beef strip loin

Volatile compounds	Non-aged			Vacuum-aged¹⁾			SEM	p value

Area unit (×10⁶)	0.1 Mpa	300 Mpa	500 Mpa	0.1 Mpa	300 Mpa	500 Mpa		Pressure	Aging	Interaction
n-aldehydes
Hexanal	12.24^b ^B	14.39^b ^B	25.38^a ^B	27.84^b ^A	29.13^b ^A	34.99^a ^A	2.17	0.03	0.04	0.65
Heptanal	2.47^B	2.28^B	3.68^B	4.21^A	3.40^A	5.83^A	0.46	0.34	0.04	0.37
Octanal	3.87^b	4.13^b	7.16^a	5.22^b	5.99^b	8.71^a	0.98	0.04	0.60	0.63
Nonanal	21.01	21.66	24.31	25.52	26.44	27.31	3.02	0.38	0.70	0.59
Sum	39.59^b ^B	42.46^a ^B	60.53^a ^B	62.79^b ^A	64.96^b ^A	76.84^a ^A	2.54	0.04	0.04	0.58
Strecker aldehydes
Butanal, 3-methyl	0.01^b	0.27^a	0.25^a	0.02^b	0.49^a	0.45^a	0.06	0.02	0.05	0.88
Butanal, 2-methyl	0.28^b ^B	0.44^a ^B	0.40^a ^B	0.41^c^A	0.74^b ^A	1.24^a ^A	0.11	<0.001	<0.001	<0.01
Benzaldehyde	0.78^b	1.11^a	1.13^a	0.77^b	1.43^a	1.67^a	0.15	<0.01	0.22	0.34
Sum	1.07^b	1.82^a ^B	1.78^a ^B	1.20^c	2.66^b ^A	3.36^a ^A	0.29	<0.001	<0.01	0.06
Pyrazine
Pyrazine, 2,5-dimethyl	0.30^c	0.41^b	0.66^a	0.27^b	0.52^a	0.54^a	0.06	<0.01	0.67	0.64
Furan
Furan, 2-pentyl	1.20	1.53	1.45	2.44	1.80	2.45	0.40	0.88	0.16	0.80

SEM, standard error of the mean.

¹⁾

Aging time was 28 days.

^a–b

Means within same aging group but different level of pressure are significantly different (p<0.05).

^A–B

Means within same level of pressure group but different aging treatment are significantly different (p<0.05).