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Applied Biological Chemistry

Table 1 Levels and codes of factors for Box-Behnken experimental design

From: Enhancement on antioxidant and antibacterial activities of Brightwell blueberry by extraction and purification

Factor

Coding level

− 1

0

1

Ethanol concentration (%)

A

50

70

90

HCl dosage (%)

B

0.05

0.40

0.75

Extraction time (h)

C

2

14

26

Extraction temperature (℃)

D

25

50

75

Solid-to-liquid ratio (g/mL)

E

1:5

1:15

1:25

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