Figure 1. Effect of independent variables on TPC.
Figure 2. 3-D Response surface graph of TPC.
Figure 3. Effect of independent variables on TFC.
Figure 4. 3-D Response surface graph of TFC.
Figure 5. Effect of independent variables on DPPH.
Figure 6. 3-D Response surface graph of DPPH.
Figure 7. Superimposing contour map of optimized conditions for TPC, TFC, DPPH.
Table 1. Levels in Extraction Condition for Rice Bran Based on Central Composite Design with Coded Values
Table 2. Central Composite Design for Optimization of Extraction Condition for Rice Bran Based on Un-coded Values
Table 3. Experimental Data on Total Phenolic Content (TPC), Total Flavonoid Content (TFC) and Electron Donation Ability (EDA) of Extract by Central Composite Design for Response Surface Methodology
Table 4. Analysis of Variance (ANOVA) of the Experimental Results of Central Composite Design for Full Quadratic Model
Table 5. Second-order Polynominal Equations Developed by Central Composite Design for the Optimization of Extraction Conditions of Rice Bran
Table 6. Optimization of Extraction Condition for Response Variables by Superimposing Contour Map Using Three Variables Simultaneously
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