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Table 4 BACE-1 inhibitory activity of 20 Korean, Australian, Brazilian, and Chinese propolis ethanol extracts

From: Relationship between total phenolic contents and biological properties of propolis from 20 different regions in South Korea

Sample

IC50, μg/mL (95 % CL)

Slope ± SE

χ2a

P-value

P1

55.8 (47.7–63.9)

1.8 ± 0.15

2.67

0.996

P2

36.3 (25.2–52.3)

0.9 ± 0.10

7.32

0.961

P3

70.0 (55.9–87.5)

1.1 ± 0.10

5.07

0.983

P4

101.1 (84.7–120.6)

1.6 ± 0.29

5.74

0.981

P5

52.9 (37.3–75.0)

0.9 ± 0.12

8.74

0.931

P6

58.2 (48.8–69.5)

1.5 ± 0.15

3.98

0.991

P7

25.7 (21.8–30.4)

1.2 ± 0.07

3.56

0.989

P8

99.1 (91.4–107.5)

1.6 ± 0.12

2.55

0.997

P9

115.4 (99.7–133.6)

3.4 ± 1.50

2.77

0.997

P10

61.4 (49.1–76.8)

1.4 ± 0.15

6.90

0.974

P11

291.9 (278.0–306.6)

1.3 ± 0.03

1.41

0.999

P12

140.0 (122.0–160.6)

1.2 ± 0.08

3.56

0.992

P13

122.5 (110.9–135.4)

2.5 ± 0.42

3.36

0.995

P14

140.5 (125.5–157.2)

2.2 ± 0.24

3.65

0.994

P15

141.1 (127.8–155.8)

2.0 ± 0.18

3.27

0.995

P16

64.6 (52.1–80.2)

1.7 ± 0.26

4.87

0.987

P17

96.7 (91.4–102.2)

2.3 ± 0.39

2.40

0.997

P18

117.5 (108.7–127.1)

2.0 ± 0.21

2.91

0.996

P19

97.8 (92.3–103.6)

2.3 ± 0.41

2.57

0.997

P20

128.7 (112.6–147.2)

1.3 ± 0.09

3.99

0.997

Australian

127.5 (114.2–142.3)

1.7 ± 0.15

3.60

0.993

Brazilian

476.5 (458.5–495.2)

1.6 ± 0.05

1.30

0.999

Chinese

116.4 (105.4–128.6)

2.7 ± 0.66

3.23

0.995

  1. aPearson’s chi-square goodness-of-fit test