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Future Journal of Pharmaceutical Sciences

Table 1 Coded and actual levels of the factors for three factor central composite

From: Development of trigger sensitive hyaluronic acid/palm oil-based organogel for in vitro release of HIV/AIDS microbicides using artificial neural networks

Independent variables

Symbols

Coded and actual levels

− 1.68

− 1

0

1

1.68

HA concentration

X1

0.10

0.12

0.15

0.18

0.20

Volume of surfactant

X2

4.90

5.22

5.70

6.18

6.50

Reaction time

X3

0.20

0.26

0.35

0.44

0.50

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