Table 1.

The effect of cold plasma treatment on color parameters of water herbs extracts presented as mean values with standard deviations.

Herb Species	L*		a*		b*
	Control	P-Treated	Control	P-Treated	Control	P-Treated
Echinacea purpurea	23.05 ± 0.56	24 ± 0.53	4.2 ± 0.3 a	7.88 ± 0.37 b	4.95 ± 0.32 a	7.88 ± 0.76 b
Salvia officinalis	31.79 ± 0.37	32.23 ± 0.55	17.06 ± 0.39	17.05 ± 0.33	20.62 ± 0.48	21.2 ± 0.76
Urtica dioica	21.03 ± 0.4	20.89 ± 0.49	-0.05 ± 0.1	0.07 ± 0.12	2.05 ± 0.11	2.35 ± 0.13
Polygonum aviculare	61.4 ± 1.33	60.42 ± 0.9	1.09 ± 0.08	1.42 ± 0.1	21.98 ± 0.76 a	24.16 ± 0.44 b
Vaccinium myrtillus	61.23 ± 2.16	58.49 ± 1.47	0 ± 0.07 a	2.08 ± 0.42 b	27.74 ± 2.39 a	34.05 ± 0.24 b
Taraxacum officinale	26.13 ± 0.65	25.64 ± 0.67	14.28 ± 0.56 a	15.15 ± 0.86 b	9.76 ± 0.34	10.41 ± 0.67
Hypericum perforatum	47.28 ± 0.3	47.74 ± 0.56	8.93 ± 0.18	8.8 ± 0.22	21.55 ± 0.48 a	25.87 ± 0.19 b
Achillea millefolium	33.35 ± 0.55	32.63 ± 0.48	15.19 ± 0.29 a	16.55 ± 0.32 b	22.44 ± 0.5	21.93 ± 0.75
Sanguisorba officinalis	49.77 ± 0.72 a	51.17 ± 0.45 b	8.94 ± 0.38	8.52 ± 0.24	35.33 ± 0.65	36.67 ± 0.47
Leonurus cardiaca	36.28 ± 0.43 a	37.57 ± 0.43 b	16.82 ± 0.63	16.52 ± 0.48	26.2 ± 1 a	28.17 ± 1.42 b
Ballota nigra	31.16 ± 0.45 a	32.41 ± 0.38 b	17.41 ± 0.88 a	18.57 ± 0.16 b	17.95 ± 1.15 a	21.74 ± 0.49 b
Andrographis paniculata	35.21 ± 0.43 a	33.13 ± 0.74 b	-0.49 ± 0.11 a	2.02 ± 0.68 b	18.2 ± 2.39	19.6 ± 1.01

Mean values bearing different letters (a, b) within each raw for each parameter differ significantly (p < 0.05).