From: Levan from Leuconostoc citreum BD1707: production optimization and changes in molecular weight distribution during cultivation
Variable code
Variable
Level
−1
0
+ 1
A
Cultivation time (h)
72
96
120
B
Cultivation temperature (°C)
20
25
30
C
Initial pH
5.5
6.5
7.5
D
Sucrose concentration (g/L)
100
150
200