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Table 1 Variables and design levels for the CCD independent variables

From: Optimization and characterization of exopolysaccharides from Leuconostoc citreum BH10 and its functional properties in vitro

Factor

Code

Level

−1

0

+ 1

Fermentation time (h)

X1

46

48

50

Fermentation temperature (°C)

X2

23

25

27

Sucrose concentration (%)

X3

18

20

22

Inoculation amount (%)

X4

1

2

3