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Table 2. Extract yield and antioxidant activity of plant extracts.

 

Plant name

Extract yield (% w/w)

% DPPH Inhibition

IC50*

0.01 µg/mL

0.1 µg/mL

0.5 µg/mL

1.0 µg/mL

01.

Curcuma zedoaria

15.43

1.60 ± 0.09

10.18 ± 0.41

15.81 ± 2.30

33.64 ± 0.50

>1000

02.

Aegle marmelos

17.04

0.42 ± 0.13

1.39 ± 0.39

23.72 ± 0.83

26.35 ± 0.39

>1000

03.

Piper betle

12.96

3.64 ± 1.27

32.36 ± 1.94

57.45 ± 1.42

70.18 ± 8.36

323.58 ± 65.58

04.

Smilax zeylanica

14.61

5.17 ± 0.42

13.68 ± 0.64

29.58 ± 0.36

49.14 ± 0.50

>1000

05.

Vitex negundo

17.98

2.54 ± 1.55

4.24 ± 3.15

17.80 ± 3.19

33.90 ± 1.20

>1000

06.

Artocarpus lakoocha

12.43

11.49 ± 5.62

32.18 ± 1.93

60.92 ± 7.35

71.26 ± 3.78

258.98 ± 99.34

07.

Dillenia indica

16.2

6.88 ± 0.27

38.62 ± 2.24

56.26 ± 1.93

69.49 ± 0.68

282.45 ± 26.57

08.

Cinnamomum tamala

11.45

29.52 ± 0.12

55.97 ± 0.06

83.55 ± 0.00

93.55 ± 0.58

45.87 ± 0.96

09.

Camellia sinensis

9.82

32.78 ± 0.21

72.86 ± 1.08

91.02 ± 0.78

94.36 ± 0.59

24.24 ± 1.58

10.

Azadirachta indica

13.08

5.22 ± 0.11

5.80 ± 0.30

19.92 ± 1.86

22.05 ± 1.50

>1000

11.

Phyllanthus emblica

19.68

4.20 ± 0.13

62.24 ± 0.30

89.86 ± 0.77

91.26 ± 0.78

62.12 ± 21.73

12.

Calotropis gigantea

4.68

0.36 ± 0.18

14.42 ± 0.55

14.96 ± 0.01

15.69 ± 0.71

>1000

13.

Averrhoa carambola

18.54

12.44 ± 0.06

13.14 ± 0.04

38.73 ± 0.22

57.74 ± 0.30

731.92 ± 85.59

14.

Terminalia bellirica

17.44

10.58 ± 0.25

59.18 ± 0.84

88.87 ± 0.80

93.32 ± 0.11

56.84 ± 1.59

15.

Curcuma longa

5.44

9.03 ± 1.83

59.03 ±16.93

64.58 ± 0.41

88.89 ± 3.86

107.12 ± 41.50

16.

Terminalia chebula

13.08

17.20 ± 1.79

83.44 ± 0.10

84.08 ± 1.20

85.35 ± 1.26

38.54 ± 0.46

17.

Manilkara zapota

4.92

9.26 ± 0.67

37.04 ± 3.81

62.04 ± 4.76

71.30 ± 3.58

239.93 ± 25.73

18.

Leucas aspera

15.28

2.78 ± 1.70

7.41 ± 1.45

9.26 ± 0.52

47.22 ± 0.77

>1000

19.

Morus nigra

16.44

17.29 ± 1.89

20.30 ± 1.21

32.33 ± 2.23

36.09 ± 0.06

>1000

20

Vitamin C (positive control)

 

52.17 ± 0.53

93.09 ± 0.44

93.86 ± 0.19

94.11 ± 0.71

7.44 ± 0.39

*IC50 (the half-maximal inhibitory concentration). Values are expressed as mean ± SD (three replication).