Table 1 Independent variables and levels for BBD.

From: Parametric optimization of the production of cellulose nanocrystals (CNCs) from South African corncobs via an empirical modelling approach

Independent variables

Unit

Actual levels of coded factors

− 1

0

1

Temp

°C

30

65

100

Time

Minute

30

60

90

Conc

wt%

45

55

65

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