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Table 6 Independent variables and their levels for D-optimal design of the hydrolysis reaction

From: Hydrolysis optimization and characterization study of preparing fatty acids from Jatropha curcasseed oil

Independent variables

 

Variable levels

  

-1

0

1

KOH (M)

X 1

1

1.5

2

Temperature (°C)

X 2

50

60

70

Time (h)

X 3

1.5

2

2.5