| Autor: |
Jatav, Jyoti, Bhattacharya, Bhaswati |
| Zdroj: |
Biomass Conversion & Biorefinery; May2024, Vol. 14 Issue 9, p10475-10485, 11p |
| Abstrakt: |
Pineapple peel contributing about 29–40% of total pineapple waste was valorised to biopolymer-based antimicrobial films. Chitosan films were formulated with 1–3% of pineapple peel extract (PPE) and glycerol (30%) as a plasticizer. The moisture content of the films reduced from 28.33 ± 0.66 to 19 ± 0.49% while water solubility reduced from 16.90 ± 0.93 to 13.12 ± 0.59% with increasing PPE concentration. The addition of PPEs decreased the tensile strength and elongation at break of the films indicating disruption of the crystalline structure of chitosan and weakening of the intramolecular H-bonding, thereby providing flexible nature to these films. Chitosan-PPE films displayed more homogenous and well-ordered surface morphology compared to pure chitosan films. The antioxidant activity of the chitosan-PPE films was evaluated by DPPH, ABTS and CUPRAC assays. Chitosan films with 3% PPE exhibited the highest antioxidant activity. DPPH assay determined 8.70 ± 0.18 μmol TE/g DW while ABTS and CUPRAC assay determined 18.97 ± 0.57 μmol TE/g DW and 51.65 ± 0.87 μmol TE/g DW respectively. The chitosan-PPE films also exhibited inhibitory zones against foodborne bacterial organisms. The maximum area of inhibition was observed against B. cereus (21.36 ± 0.30 mm) and S. aureus (22.36 ± 1.32 mm) when 3% PPE was incorporated into the chitosan matrix. On the other hand, for the gram-negative bacterial strains, E. coli and S. typhimurium, comparatively lower inhibition zones were observed at 17.46 ± 0.83 mm and 12.9 ± 0.1 mm, respectively. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
Full text from SpringerLink