Author/Authors :
Beigmohammadi, Faranak Department of Food Science - College of Agriculture - University of Tabriz, Tabriz , Peighambardoust, Hadi Department of Food Science - College of Agriculture - University of Tabriz, Tabriz , Hesari, Javad Department of Food Science - College of Agriculture - University of Tabriz, Tabriz , Peighambardoust, Jamaleddin Department of Polymer Science and Technology - Faculty of Chemical & Petroleum Engineering - University of Tabriz, Tabriz
Abstract :
Background and Objectives: Antimicrobial active packaging with metallic nanoparticles is used as
antimicrobial agent in the packaging of food. This study considers the coliform retarding ability of
antimicrobial packaging in ultra-filtrated (UF) cheese.
Materials and Methods: Plastic films based on low-density polyethylene containing organoclay (cloisite 30B)
and different percentages of Ag and CuO nanoparticles produced by extrusion method. Coliform bacteria
growth in UF cheese was investigated. The release of nanoparticles from nanocomposite into a food simulant
was also assessed.
Results: An amount of 3.17-log cfu/g and 0.75-log cfu/g reduction for coliform bacteria obtained for
nanocomposite and control films, respectively after four weeks of storage at 4 °C. Nanocomposite film with
1.3% Ag and 2.7% CuO in LDPE matrix introduced as optimum point by Design Expert 7.1.5 software.
Microbial model for decreasing growth of coliform bacteria in this product was also determined. Validation of
optimum point was carried out using a one-way ANOVA. It was shown that ther is a non-significant (p>0.05)
difference with its repeat and a significant (p<0.05) difference with the pure film.
Conclusions: Plastic nanocomposite films containing nanoparticle of organoclay and metal can decrease the
severity of food processing and application of chemical preservatives in the food industries.
Keywords :
UF cheese , Packaging , Nanoparticles , Nanocomposite , Antimicrobial
