Table 4
Properties of pretreated lotus leaves at different storage temperatures
| Pre-treatments | Storage temp. (℃) | Soluble solids (°Brix) | pH | Total acid (%,w/v) | Polyphenol (mg/kg GAE3)) |
| Fresh | 25 | 0.37±0.151) | 5.33±0.09 | 0.03±0.01 | 381.33±8.36 |
| 4 | 0.27±0.06 | 5.31±0.01 | 0.03±0.00 | 375.14±2.28 |
| -10 | 0.37±0.06 | 5.34±0.08 | 0.03±0.01 | 386.80±100.56 |
| Blanched | 25 | 0.23±0.06 | 5.71±0.17 | 0.01±0.00 | 206.73±3.75a2) |
| 4 | 0.17±0.06 | 5.85±0.26 | 0.02±0.00 | 185.22±0.73b |
| -10 | 0.23±0.06 | 5.79±0.03 | 0.01±0.00 | 178.79±12.65b |
| Roasted | 25 | 0.33±0.06 | 5.46±0.09 | 0.03±0.00 | 308.12±2.46 |
| 4 | 0.33±0.12 | 5.60±0.08 | 0.03±0.00 | 287.06±5.49 |
| -10 | 0.37±0.06 | 5.53±0.09 | 0.03±0.00 | 308.74±26.92 |
| Dried | 25 | 0.77±0.06 | 5.23±0.14 | 0.07±0.00 | 587.03±12.98b |
| 4 | 0.80±0.10 | 5.31±0.01 | 0.06±0.01 | 738.36±16.83a |
| -10 | 0.77±0.06 | 5.10±0.10 | 0.07±0.00 | 721.53±91.66a |
| Significance | F-value | | | |
| Storage temp. (S) | 0.913 | 0.761 | 0.913 | 1.75 |
| Pretreatments (P) | 120.000*4) | 46.042* | 86.783* | 240.198* |
| S × P | 0.6 | 0.846 | 0.565 | 3.790* |
Each value is mean±SD (n=3).
Means in a column by different superscripts are significantly different at p<0.05significance level by Duncan's multiple range test.
GAE, gallic acid equivalent.
significant at p<0.05.