Abstract
In the search for new biodegradable materials and greater microbiological safety and stability of perishable food products, this study aimed to develop a bioplastic antibacterial film incorporating bacteriocin for application in commercial curd cheese and monitoring of microbiological stability. Films with good handling characteristics as well as physical, barrier, and mechanical properties were obtained. Regarding the antibacterial activity, the microbial reduction was demonstrated in a food matrix, obtaining a reduction of 3 logarithmic cycles for the group of coagulase positive staphylococci and from 1100 to <3.00 MPN/g in the analysis of thermotolerant coliforms. Therefore, the film presented food barrier characteristics with the external environment and adequate migration of the antibacterial compound to the product, contributing to the reduction of contamination of a food with high initial microbial load.
Highlights
Bioplastic films are materials synthesized from natural sources which present much higher degradation than conventional films of petrochemical origin [1]
The solubility varied from 23.80% to 77.18% and the water vapor permeability from 0.11 to
It was possible to observe the efficiency of bacteriocin when incorporated in a filmogenic matrix, presenting a reduction of 3 logarithmic cycles for the curd stored with the incorporated bacteriocin film, the contamination by thermotolerant coliforms was reduced from 1100 to
Summary
Bioplastic films are materials synthesized from natural sources which present much higher degradation than conventional films of petrochemical origin [1] They present dynamic materials with the most diverse characteristics, related to the techniques of preparation for the materials used [2]. The growing demand of the population for natural foods free of synthetic chemical additives implies the development of alternative technologies for food conservation, mainly for combating pathogenic microorganisms, which have the same effectiveness as conventional methods. This demand has led to the use of natural antimicrobials from plant, animal, or microbial sources [4]
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