Table 6. Free amino acids contents and ratio of aged pork loin by aging method

Variable	Contents (mg/100g)				Percentage (%)
Variable	Wet	Normal	Scoria	LS	Wet	Normal	Scoria	LS
Alanine	34.5±6.7	33.6±6.2	34.9±7.6	NS	12.22±1.69	12.49±1.69	12.70±3.95	NS
Aminoadipic acid	6.5±11.5	3.5±2.1	2.4±1.2	NS	1.89±2.51	1.25±0.52	0.88±0.30	NS
Arginine	12.3^a±3.4	10.8^ab±3.0	8.3^b±4.0	^*	4.15^a±0.92	3.98^ab±0.78	3.10^b±1.43	^*
Cystathionine	4.3±9.4	2.3±1.4	2.6±1.2	NS	1.17±2.15	0.78±0.35	0.82±0.29	NS
Ethanolamine	2.0±2.3	1.8±0.9	3.3±4.1	NS	0.63±0.50	0.69±0.18	1.17±1.59	NS
Glutamic acid	42.4±15.8	39.4±11.2	33.8±8.1	NS	14.27±3.05	14.38±1.43	12.26±2.96	NS
Glycine	12.9±4.4	13.0±2.8	13.1±2.7	NS	4.47±1.12	4.83±0.45	4.64±0.41	NS
Histidine	7.5±6.8	5.2±2.2	5.1±1.9	NS	2.23±1.35	1.76±0.34	1.71±0.35	NS
Isoleucine	11.9±4.5	10.8±3.7	11.5±3.8	NS	3.86±0.30	3.85±0.37	3.94±0.56	NS
Leucine	19.4±7.5	18.3±3.7	19.1±6.1	NS	6.29±0.80	6.40±0.77	6.55±0.89	NS
Lysine	15.3±9.8	13.8±5.5	15.9±8.5	NS	4.68±1.83	4.83±0.77	5.32±2.08	NS
Methionine	11.2±4.6	10.3±4.0	11.3±4.4	NS	3.62±0.63	3.70±0.60	3.86±0.76	NS
Ornithine	3.3±3.5	2.8±2.6	2.8±2.1	NS	0.95±0.69	0.93±0.55	0.93±0.50	NS
Phenylalanine	10.9±4.9	10.6±4.4	12.2±4.6	NS	3.48±0.78	3.65±0.67	4.12±0.84	NS
Proline	6.1±3.4	5.1±2.9	4.7±1.7	NS	2.01^a±0.42	1.80^ab±0.43	1.65^b±0.24	^*
Sarcosine	4.0±5.7	2.4±0.5	2.2±0.4	NS	1.16±1.24	0.89±0.21	0.82±0.20	NS
Serine	19.9±17.3	14.6±5.4	14.6±4.2	NS	5.97±3.42	5.13±1.88	5.10±0.73	NS
Taurine	15.3^b±4.8	15.5^b±4.6	19.3^a±3.5	^*	5.17^b±1.23	5.82^ab±1.88	6.93^a±1.32	^*
Threonine	11.8±5.2	10.8±4.0	11.0±3.7	NS	3.81±0.71	3.82±0.42	3.77±0.54	NS
Tyrosine	9.7±2.9	9.5±2.6	10.1±2.5	NS	3.33±0.82	3.50±0.44	3.56±0.49	NS
Urea	26.4±4.9	25.5±10.7	23.1±9.7	NS	9.42±3.27	9.34±2.64	8.18±2.50	NS
Valine	21.4±12.4	18.4±5.0	25.8±4.4	NS	6.79±2.04	6.63±0.56	8.71±0.60	NS
Total amino	303.9±96.7	276.9±80.7	284.9±64.0	NS	-	-	-	-
Sweet	81.8±24.1	77.2±20.7	78.4±15.4	NS	27.3±1.17	28.08±1.17	27.85±3.02	NS
Umami	42.4±15.8	39.4±11.2	33.8±8.1	NS	14.27±1.43	14.38±1.43	12.26±2.96	NS
Bitter	113.9±47.0	102.3±36.3	106.9±32.7	NS	36.56±4.07	36.29±4.07	36.84±4.67	NS
Functional	18.2±6.0	18.4±6.3	22.1±4.7	NS	6.04^b±1.67	6.75^b±1.67	7.85^a±1.05	^**

Mean±SD.
Means with different superscripts in the same row significantly differ.
p<0.05;
p<0.01.
Wet, wet-aging; Normal, dry-aging in normal Korean earthenware; Scoria, dry-aging in Jeju scoria earthenware; LS, level of significance; NS, not significant.