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Sodium alginate (SA) edible composite film incorporated with different amounts of galangal essential oil (EO)/curcumin (Cur) was prepared by solvent casting method and applied to fresh-cut pineapple in this study. The results showed that 0.3% EO could improve the thickness and thermal stability of the composite film, and reduce the water vapor penetration rate. SA-0.3%EO and SA-0.3% EO-Cur film groups had significant fresh-keeping effect on fresh-cut pineapple, while the control group showed obvious browning after three days of storage at 4 ℃. The fresh-cut pineapple in SA-0.3% EO-Cur group maintained the best appearance, followed by SA-0.3%EO group. When the storage time was extended to eight days, the weight loss of fresh-cut pineapple in the SA-0.3%EO coating group was the lowest (2.12±0.08)%, the total number of colonies (lgCFU/g) was 3.48±0.00, the number of molds and yeast (lgCFU/g) was 3.89±0.19 were the lowest. However, the appearance color of the SA-0.3% EO-Cur coated group was the best, and the antibacterial effect was second only to that of the SA-0.3%EO coated group, which was obviously better than the control group. However, when the EO content increased to 0.5%, the appearance of fresh-cut pineapple also showed browning and other quality deterioration, indicating that the concentration of essential oil would affect its preservation effect and have a negative impact on the quality of fruit. In conclusion, this study would provide a new idea for the development of a new edible film system, and provide data support and theoretical support for extending the shelf life of fresh-cut pineapple.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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