Table 1.
Central composite design matrix and experimental values of total yield extraction (TSSY), anti-oxidant activity content (AA), polyphenol compounds of 6-gingerol and 6-shogaol composed in fresh freeze dried ginger extract under microwave assisted extraction.
Table 2.
Experimental variables and their levels in coded and un-coded forms for central composite design.
Table 3.
Regression coefficient of predicted quadratic polynomial models of TSSY content, AA content, 6-gingerol and 6-shogaol content of fresh freeze dried ginger.
Table 4.
Fit statistics and numerical estimated level of extraction condition for the maximum TSSY, AA content, 6-gingerol and 6-shogaol content of the fresh freeze dried ginger.
Table 5.
Predicted optimal ranges, and forecasted experimental values of TSSY, 6-gingerol and 6-shogaol from freeze dried ginger under microwave-assisted extraction.
Table 6.
Comparison between fresh freeze dried ginger and steamed freeze dried ginger.