Table 2. Change of color of traditional Korean soy sauce by fermentation period according to onion juice addition ratio

Sample	Color
	L value
	0 day	15 day	30 day	45 day	60 day	75 day	90 day
Control¹⁾	58.63±0.03²⁾^a³⁾	57.73±0.07^b	49.16±0.03^e	39.05±0.06^e	38.37±0.00^a	28.63±0.08^c	24.00±0.02^d
OE30	53.17±0.00^b	57.85±0.00^a	51.29±0.00^c	40.90±0.06^c	35.88±0.04^b	29.66±0.00^a	24.14±0.13^d
OE50	53.06±0.12^b	55.80±0.00^c	53.84±0.02^a	40.80±0.05^d	34.10±0.00^d	29.22±0.00^b	24.55±0.10^c
OE70	48.68±0.05^c	51.99±0.00^e	52.00±0.00^b	41.08±0.00^b	35.13±0.05^c	26.23±0.07^d	26.75±0.02^b
OE100	48.49±0.05^d	55.20±0.04^d	49.55±0.00^d	42.39±0.00^a	32.44±0.01^e	26.20±0.12^d	30.67±0.10^a
	a value
Control	5.64±0.02^d	22.76±0.07^a	34.85±0.12^a	46.48±0.10^c	52.87±0.03^c	59.44±0.25^a	73.16±0.24^b
OE30	7.45±0.00^c	21.99±0.00^d	26.30±0.00^d	40.41±0.12^d	51.64±0.06^d	57.17±0.03^b	75.18±0.49^a
OE50	9.14±0.07^a	22.57±0.14^b	23.94±0.01^e	48.62±0.23^a	57.02±0.03^b	56.75±0.00^c	64.11±0.12^c
OE70	7.80±0.20^b	22.77±0.05^a	33.34±0.00^b	48.54±0.06^a	45.09±0.10^e	56.20±0.29^d	58.27±0.22^d
OE100	9.01±0.02^a	22.14±0.04^c	32.50±0.05^c	46.87±0.15^b	61.28±0.19^a	57.39±0.28^b	44.55±0.15^e
	b value
Control	20.19±0.06^e	126.72±0.12^b	111.94±0.05^e	94.52±0.10^e	93.35±0.00^a	76.55±0.13^b	68.85±0.15^d
OE30	28.12±0.00^c	126.94±0.00^a	115.58±0.06^b	97.71±0.10^c	89.06±0.07^b	78.33±0.00^a	68.82±0.23^d
OE50	29.95±0.11^b	122.15±0.00^d	114.94±0.03^c	97.54±0.09^d	85.99±0.00^d	70.33±0.00^d	70.27±0.16^c
OE70	27.50±0.05^d	116.83±0.00^e	116.85±0.00^a	98.02±0.00^b	87.75±0.08^c	72.41±0.12^c	73.31±0.03^b
OE100	30.26±0.12^a	122.36±0.07^c	112.63±0.00^d	100.28±0.00^a	83.14±0.02^e	72.32±0.18^c	80.08±0.17^a

Control, traditional Korean soy sauce without onion juice; OE30, traditional Korean soy sauce with 30% onion juice added; OE50, traditional Korean soy sauce with 50% onion juice added; OE70, traditional Korean soy sauce with 70% onion juice added; OE100, traditional Korean soy sauce with only onion juice added.
All values are mean±SD (n=3).
Means followed by the different letters in same column are significantly different (p⟨;0.05, a>b>c>d>e).