Table 1 Antioxidant activity (as % and IC₅₀) of the four promising algal fractions from the crude extract from {(0.316 mg/L (Cu) of C.vulgaris compared to BHT and vitamin C as standards against ABTS (%) radical method

500

94.013±1.00^a

96.220±1.070^a

97.203±1.06^a

94.253±1.092^a

94.3±3.0^a

97.1±3.6^a

250

93.110±1.01^a

95.237±1.081^a

96.220±1.07^a

89.013±1.000^b

90.8±2.9^b

93.2±2.5^b

125

80.000±1.00^b

85.157±1.036^b

92.283±1.11^b

85.110±1.018^c

85.4±2.0^c

90.2±2.1^c

62.50

54.947±0.88^c

68.170±0.662^c

86.203±0.621^c

71.073±0.793^d

70.7±1.0^d

87.9±1.9^d

31.25

51.077±0.88^d

56.000±1.000^d

80.410±0.524^d

66.190±0.734^e

57.5±0.9^e

76.9±1.9^e

15.62

39.333±0.57^e

40.610±0.385^e

53.000±1.00^e

44.600±0.529^f

51.8±0.9^f

53.0±1.0^f

IC₅₀

19.85

19.52

14.2

17.75

15.1

14.7