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- W1990960393 abstract "The aim of this work was to assess the antimicrobial capacity of chitosan-based films obtained by a dissolution and solvent evaporation (solvent casting) method at various temperatures (i.e., 37, 80, and 120 °C) on the growth of Staphylococcus aureus and Salmonella spp. bacteria. The effect of temperature (4, 23, 37 °C) and relative humidity (RH; 0, 75%) during storage on the biocide performance was also investigated. Color parameters and ATR-FTIR spectra were analyzed for each sample to investigate the relationship between structural and/or chemical alterations in the films during storage and biocide performance. The results indicated that films formed at 37 and 80 °C presented a significant inhibitory effect for both types of bacteria; however, when cast at 120 °C, the films ceased to exhibit antimicrobial properties. Curiously, chitosonium acetate films were seen to diminish to a large extent their biocide properties when stored at 23 °C and 75% RH for 2 months or alternatively when stored and 37 °C and 0% RH over the same period of time. In good agreement with this behavior the FTIR results indicated that under the previous conditions a significant fraction of the biocide carboxylate chemistry remained in the polymer after contact with the bacterial solution due to a strong reduction in cast film solubility. Because biopolymer active species migration from the film to the culture media is needed for the biomaterial to exhibit measurable antimicrobial effect, proper control of temperature and humidity during film formation and storage is necessary to design the optimum performance of chitosan as a biocide." @default.
- W1990960393 created "2016-06-24" @default.
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- W1990960393 date "2009-03-13" @default.
- W1990960393 modified "2023-10-05" @default.
- W1990960393 title "Optimization of the Film-Forming and Storage Conditions of Chitosan as an Antimicrobial Agent" @default.
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- W1990960393 doi "https://doi.org/10.1021/jf8037709" @default.
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