E-viri
Recenzirano
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Pu, Yijing; Wang, Hongxuan; Jiang, Haitao; Cao, Jiankang; Qu, Guiqin; Jiang, Weibo
International journal of biological macromolecules, March 2024, 2024-Mar, 2024-03-00, 20240301, Letnik: 261, Številka: Pt 1Journal Article
Guar gum (GG) composite films, incorporating the ethanolic extract of propolis (EEP), were prepared and subjected to a comprehensive investigation of their functional characteristics. The addition of EEP resulted in a discernible enhancement in the opacity, moisture barrier capacity, and elongation at break. Incorporating EEP led to a noteworthy increase in the total phenolic and total flavonoid content of the films, resulting in superior antioxidant capacity upon GG-EEP films. Remarkably, the addition of 5 % EEP yielded noteworthy outcomes, manifesting in a DPPH radical scavenging rate of 47.60 % and the ABTS radical scavenging rate of 94.87 %, as well as FRAP and cupric reducing power of 331.98 mmol FeSO4-7H2O kg−1 and 56.95 μg TE mg−1, respectively. In addition, GG-EEP films demonstrated antifungal effect against Penicillium expansum and Aspergillus niger, along with a sustained antibacterial effect against Escherichia coli and Staphylococcus aureus. GG-EEP films had superior inhibitory ability against Gram-positive bacteria than Gram-negative bacteria. Crucially, GG-EEP composite films played a pivotal role in reducing both lesion diameter and depth, concurrently mitigating weight loss and firmness decline during the storage period of “Nanguo” pears. Therefore, GG-EEP composite films have the considerable potential to serve as advanced and effective active packaging materials for food preservation. Display omitted •Guar gum-ethanolic extract of propolis (GG-EEP) composite films were prepared.•EEP improved the film's barrier properties to visible light and water vapor.•GG-EEP films showed superior antioxidant and anti-Gram-positive bacteria activity.•GG-EEP coating reduced the weight loss and lesion diameter of “Nanguo” pears.•GG-EEP films had the potential as active packaging materials for food preservation.
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in: SICRIS
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