. 2017 Nov 8;4(4):81. doi: 10.3390/medicines4040081

Table 5.

Antioxidant activity in terms of IC₅₀ values for leaves and rhizome essential oils.

S.N.	Sample Name	DPPH IC₅₀ Value (µg/mL) ± SD				Reducing RP₅₀ Value (µg/mL) ± SD				Chelating IC₅₀ Value (µg/mL) ± SD
S.N.	Sample Name	Seasons
		SPRING	SUMMER	AUTUMN	WINTER	SPRING	SUMMER	AUTUMN	WINTER	SPRING	SUMMER	AUTUMN	WINTER
1	ACPGREO	198.06 ^h ±0.07	41.46 ^c ±0.66	107.52 ^g ±3.96	78.03 ^f ±3.30	137.14 ^b ±1.39	72.89 ^b ±0.01	52.30 ^a ±3.99	65.32 ^a,b ±0.15	34.82 ^c ±0.27	68.53 ^a ±0.99	206.75 ^e ±4.30	24.00 ^c ±0.12
2	ACPGLEO	59.20 ^d ±0.36	59.36 ^f ±0.81	83.07 ^e ±2.73	70.36 ^e ±2.80	168.97 ^b ±0.89	320.11 ^e ±2.47	227.63 ^d ±4.36	350.98 ^f ±3.88	15.24 ^a ±0.06	13.08 ^a ±0.13	158.10 ^b ±11.56	25.78 ^d ±0.12
3	ACPNREO	188.36 ^g ±3.59	41.35 ^c ±0.10	59.02 ^c ±1.26	37.31 ^c ±0.19	475.48 ^e ±28.19	77.72 ^b ±0.19	71.54 ^b ±0.12	325.83 ^e ±0.04	47.25 ^f ±0.32	41.29 ^b ±0.37	187.41 ^d,e ±10.59	30.04 ^f ±0.25
4	ACPNLEO	116.22 ^f ±3.14	78.71 ^g ±2.83	75.53 ^d ±2.11	58.71 ^d ±0.71	414.19 ^d ±17.8	245.77 ^d ±7.68	131.70 ^c ±1.25	201.25 ^d ±4.74	29.78 ^b ±0.22	11.72 ^c ±0.03	153.13 ^b ±13.55	26.94 ^e ±0.20
5	ACBTREO	49.67 ^c ±1.53	51.42 ^e ±0.65	82.52 ^e ±1.88	38.52 ^c ±0.62	326.87 ^c ±11.83	72.24 ^b ±0.18	71.08 ^b ±0.10	84.97 ^b ±0.22	44.98 ^e ±1.34	84.64 ^c ±2.25	193.54 ^e ±9.28	18.21 ^a ±0.03
6	ACBTLEO	83.94 ^e ±1.97	46.36 ^d ±0.94	96.17 ^f ±2.85	98.27 ^g ±4.44	382.27 ^d ±2.92	161.65 ^c ±0.82	73.98 ^b ±0.19	133.34 ^c ±18.88	30.88 ^b ±0.14	16.84 ^d ±0.59	164.46 ^b,c ±9.19	19.82 ^b ±0.07
7	BHT *	27.74 ^b ±0.05	27.74 ^b ±0.04	27.74 ^b ±0.04	28.37 ^a ±0.20	-	-	--	-	-	-	-	-
8	Catechin *	18.53 ^a ±0.15	18.53 ^a ±0.15	18.53 ^a ±0.15	28.48 ^b ±0.17	71.74 ^b ±1.39	71.74 ^b ±0.49	71.74 ^b ±0.49	71.74 ^a,b ±0.49	-	-	-	-
9	Gallic acid	-	-	-	-	56.14 ^b ±1.39	56.07 ^a ±0.91	56.07 ^a ±0.91	56.07 ^a ±0.91	-	-	-	-
10	EDTA	-	-	-	-	-	-	-	-	38.74 ^d ±0.33	38.74 ^e ±0.33	38.74 ^a ±0.33	38.74 ^g ±0.33
11	Citric acid	-	-	-	-	-	-	-	-	45.57 ^e ±0.33	45.57 ^f ±0.33	45.57 ^a ±0.33	45.57 ^h ±0.33

ACPGREO = Acorus calamus Pithoragarh rhizome essential oil, ACPGLEO = Acorus calamus Pithoragarh leaves essential oil, ACPNREO = Acorus calamus Pantnagar rhizome essential oil, ACPNLEO = Acorus calamus Pantnagar leaves essential oil, ACBTREO = Acorus calamus Bhimtal rhizome essential oil, ACBTLEO = Acorus calamus Bhimtal leaves essential oil. - = Not applicable, Values are means of three replicates ± SD, Within a column, mean values followed by the same letter are not significantly different according to Tukey’s test (p < 0.05).