RESULTS AND DISCUSSION
Statistical analysis
The experimental value and analysis of
variance for five response variables; yield, TSS,
RSS, clarity and browning index under different treatment conditions are presented in Tables 2 and
3, respectively. It showed that the response surface
model developed for all response variables were
adequate. The determination coefficient (R2)
values for all response variables were higher than
0.75 except TSS (0.54), indicating that the
regression model explained the reaction well.