Journal
TRENDS IN FOOD SCIENCE & TECHNOLOGY
Volume 110, Issue -, Pages 291-303Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tifs.2021.01.084
Keywords
Edible film; Active packaging; Antimicrobial; Methods of antibacterial activity
Categories
Funding
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences and Agricultural Research, Education and Extension Organ
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There is no standardized methodology for assessing the antimicrobial effects of edible films, but disc and well diffusion assays along with viable cell count methods are the most common. The key to selecting an appropriate evaluation method lies in the type of active components and materials used in producing the edible films.
Background: Active packaging plays an important role in food and seafood preservation in the sector of food safety. The main role of antimicrobial packaging is to prohibit the bacterial and fungal growth. Biopolymers are the main film-forming materials which can be integrated with preservatives and antimicrobial agents, and the edible films containing the additives can be utilized as a substitute to maintain food products. Scope and approach: Although different tests including disc and well diffusion assays, viable cell counts, vaporphase technique, and optical density-based methods are used by microbiologists, no standard methodology has been firmly established to assess the antimicrobial effects of edible films. Hence, this review discusses the strengths and limitations of the published microbial methodologies used for assessing the activity of antimicrobial packaging. Key findings and conclusion: The type of active components and materials used to produce edible films are among the most fundamental aspects to select an appropriate evaluation method. Our findings revealed that the disc and well diffusion assays followed by the viable cell count methods are the most common methods for evaluating the antimicrobial activity of edible films.
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