Table 1.
Water vapor permeability, thickness, dry matter, solubility, swelling and DPPH radical scavenging capacity of films.
| Film | WVP 1 | Thickness | Dry matter | Solubility | Swelling | DPPH 3 |
|---|---|---|---|---|---|---|
| (µm) | (g/100 g) | (% D.M. 2) | (%) | (%) | ||
| 3% glycerol | ||||||
| pH 7 | 1.63 ± 0.11 b | 177.99 ± 4.70 c | 68.78 ± 0.73 a | 41.89 ± 1.35 ab | 82.77 ± 0.93 a | 14.27 ± 0.70 d |
| pH 10 | 1.70 ± 0.11 b | 187.87 ± 3.34 d | 70.12 ± 0.88 b | 40.04 ± 0.83 a | 112.89 ± 2.74 c | 13.18 ± 0.70 c |
| 1% glycerol | ||||||
| pH 7 | 0.83 ± 0.05 a | 141.30 ± 6.30 a | 88.73 ± 0.83 c | 41.40 ± 1.97 a | 99.49 ± 2.14 b | 3.80 ± 0.22 a |
| pH 10 | 0.81 ± 0.03 a | 154.79 ± 3.30 b | 88.48 ± 0.57 c | 43.65 ± 0.99 b | 127.45 ± 3.30 d | 6.66 ± 0.34 b |
| Analysis of variance | ||||||
| Glycerol | *** | *** | *** | * | *** | *** |
| pH | NS | *** | NS | NS | *** | ** |
| Interaction | NS | NS | NS | * | NS | *** |
1 WVP—water vapor permeability expressed in g mm/kPa h m2; 2 dry matter; 3 DPPH—2,2-Diphenyl-1-picrylhydrazyl radical scavenging capacity. Means in the same column with different letters (a–d) are significantly different (p < 0.05). NS—not significant (p > 0.05); * p < 0.05; ** p < 0.01; *** p < 0.001.