Table 2.
Physicochemical properties of the modified chitosan film with geraniol and thymol.
| Film | Dry weight (g) ± SE | Thickness (mm) ± SE | WVP (g/m2·d) ± SE | Antioxidant activity | Swelling index at time (h) | |||
|---|---|---|---|---|---|---|---|---|
| 0.5 | 2.5 | 4 | 24 | |||||
| Ch/starch | 0.150c ± 0.01 | 0.068b ± 0.01 | 40.12 ± 8.87 | 0.173a ± 0.01 | 0.85 | 1.36 | 2.14 | 1.15 |
| Ch/starch + 0.1% G | 0.206b ± 0.01 | 0.104a ± 0.01 | 48.88 ± 1.65 | 0.182a ± 0.02 | 1.75 | 4.27 | 4.69 | 5.10 |
| Ch/starch + 0.5% G | 0.208b ± 0.01 | 0.107a ± 0.01 | 70.49 ± 5.48 | 0.186a ± 0.06 | 1.93 | 4.69 | 4.85 | 5.34 |
| Ch/starch + 0.1% T | 0.217ab ± 0.00 | 0.114a ± 0.01 | 36.48 ± 1.53 | 0.188a ± 0.08 | 3.35 | 3.81 | 3.89 | 3.96 |
| Ch/starch + 0.5% T | 0.231a ± 0.00 | 0.124a ± 0.01 | 29.76 ± 3.29 | 0.192a ± 0.08 | 1.44 | 2.25 | 3.38 | 2.97 |
Ch: chitosan; G: geraniol; T: thymol.
WVP: water vapor permeability.
Antioxidant activity expressed as mg equivalents of ascorbic acid equivalent per g of film ± SE.
Different letters in the same column indicate significant differences according to the Student-Newman-Keuls (SNK) test (P ≤ 0.05). Values are the mean of five replicates and are given as mean ± standard error.