Table 3. Functional component content of ginger extracts as affected by pH adjustment

Treatment 2)TP (%) TF (%) Total (%) 6-G (%) 8-G (%) 10-G (%) 6-S (%) 8-S (%) 10-S (%)
1)CON 3)1.43±0.02c4) 0.33±0.02c 0.57±0.06c 0.45±0.05c 0.03±0.00b 0.00±0.00c 0.05±0.00b 0.04±0.01 0.01±0.00
A 2.37±0.05a 0.68±0.00a 1.53±0.05a 1.22±0.03a 0.09±0.00a 0.03±0.01b 0.06±0.00ab 0.11±0.00 0.02±0.00
B 1.52±0.01b 0.37±0.01b 1.08±0.13b 0.78±0.09b 0.10±0.02a 0.06±0.01a 0.08±0.01a 0.05±0.01 0.02±0.00
F-value 890.94***5) 911.55*** 84.34*** 117.07*** 28.79** 42.00*** 7.63* NS NS
1)Abbreviations are the same as in Table 2.
2)TP, total polyphenol; TF, total flavonoids; Total, sum of the 6, 8, 10 gingerol and 6, 8, 10 shogaol; 6-G, 6-gingerol; 8-G, 8-gingerol; 10-G, 10-gingerol; 6-S, 6-shogaol; 8-S, 8-shogaol; 10-S, 10-shogaol.
3)All values are mean±SD (n=3).
4)a-cMeans with different small letters in the same column differ significantly by Duncan's multiple range test (p<0.05).
5)*, p<0.05; **, p<0.01; ***, p<0.001; NS, not significant.