Table 1.
In vitro total phenolic content, antiradical and bacterial inhibition of GTWE and chitosan coatings.
| Treatment 1 | TPHC (mg GAE/g) |
FRSA (%) | Antimicrobial Assay (%) | |||
|---|---|---|---|---|---|---|
| S. aureus | L. innocua | E. coli | S. typhimurium | |||
| GTWE | 582.7 ± 24.0 a | 90.7 ± 1.0 a | 86.8 ± 0.2 c | 95.1 ± 0.22 c | 94.6 ± 0.10 d | 91.7 ± 0.17 c |
| ChC—0% | 0.03 ± 0.01 d | 0.16 ± 0.01 c | 58.6 ± 1.2 d | 64.1 ± 1.3 e | 49.7 ± 0.11 e | 82.2 ± 1.3 d |
| ChC—0.1% | 0.67 ± 0.05 c | 71.9 ± 2.2 b | 86.6 ± 0.10 c | 94.9 ± 0.29 d | 96.1 ± 0.06 c | 93.1 ± 0.13 c |
| ChC—0.5% | 3.3 ± 0.23 b | 92.5 ± 1.1 a | 96.6 ± 0.10 b | 97.6 ± 0.22 b | 97.7 ± 0.17 b | 97.4 ± 0.19 b |
| Asc ac | - | 94.0 ± 2.5 a | - | - | - | - |
| Gentamicin | - | - | 99.2 ± 0.10 a | 99.1 ± 0.11 a | 99.5 ± 0.06 a | 99.5 ± 0.06 a |
1 Values correspond to mean ± standard deviation (n = 6 per treatment). GTWE, green tea water extract; ChC—0%, chitosan without GTWE; ChC—0.1%, chitosan with 0.1% of GTWE; ChC—0.5%, chitosan with 0.5% of GTWE. TPHC, total phenolic content; FRSA, free radical scavenging activity; Asc ac, ascorbic acid. Both standards were tested at 25 µg/mL. Different superscripts (a–e) within a column indicate significant differences among treatments (p < 0.05).