The Scientific World Journal / 2013 / Article / Tab 1

Research Article

Extraction Optimization of Tinospora cordifolia and Assessment of the Anticancer Activity of Its Alkaloid Palmatine

Table 1

Independent variables and their levels used in the response surface design.

Serial numberIndependent variablesSymbolsFactor level
Low (−1)Middle (0)High (+1)

1Extraction temperature (°C) 304050
2Extraction time (hours) 163248
3Extraction cycles (cycle) 41220

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