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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 variablesSymbolsCoded and actual levels
− 1.68− 1011.68
HA concentrationX10.100.120.150.180.20
Volume of surfactantX24.905.225.706.186.50
Reaction timeX30.200.260.350.440.50