Food Safety and Packaging
Food Safe Package

Potential application of Leuconostoc mesenteroides postbiotics and Zinc-carbon dots in fresh pasta filata cheese by aerosolization method

Document Type : Original Article

Authors

Elahe Divsalar 1
Hossein Tajik 2
Rahim Molaei 3

1 Veterinary Office of Chalous, Mazandaran, Iran

2 Department of Food Hygiene and Quality Control, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran

3 Fanavaran NanoZist Plast Co., 1177 Urmia, Iran

https://doi.org/10.30466/fsp.2025.56678.1018
Abstract
In this research, the white postbiotics (P) powder of Leuconostoc mesenteroides and white zinc carbon dots (Z-CDs) from zinc acetate, which were prepared in our previous studies, were used. Hydroxyl, carbonyl, and carboxyl groups in the P were confirmed by FTIR spectra to affect the functions, antioxidant, and antimicrobial capabilities. Antioxidant activity of P was confirmed based on DPPH (IC50 values, 0.28 mg/mL) and FRAP (total antioxidant capacity, 73.5 nM of Fe2SO4/L) methods. The antimicrobial properties of P solutions at concentrations of 150, 300, and 450 mg/mL were evaluated through the agar well diffusion assay against Escherichia coli, which showed acceptable antimicrobial effects. E. coli was sensitive at 4 °C and 25°C in photodynamic treatments. The effects of P (300 mg/mL), Z-CDs (5 mg/mL), and their combination (Z-CDs-P) as additives in fresh pasta filata cheese were studied by aerosolization method. The results showed that the highest inhibitory effects were observed in P, Z-CDs-P, and Z-CDs420nm-Ps treatments; so that E. coli reached 1 log10 CFU/g on days 18, 14, and 12, respectively. We concluded that the aerosolization method of P and CDs had a novel antibacterial activity and can be used for the packaging of cheese.

Keywords

Active packaging
Cheese application
Photodynamic
Spray Method
Subjects
Food Safety and Packaging
Volume 1, Issue 3
Autumn 2025
Pages 159-172

  • Receive Date 22 October 2025
  • Revise Date 07 November 2025
  • Accept Date 10 November 2025

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