Effect of chitosan on Bacillus cereus inhibition and quality of cooked rice during storage |
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| Authors: | Chitsiri Rachtanapun Juthamas Tantala Phatthranit Klinmalai Savitree Ratanasumawong |
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| Affiliation: | 1. Department of Food Science and Technology, Faculty of Agro‐Industry, Kasetsart University, Bangkok, Thailand;2. Center for Advanced Studied Agriculture and Food, Kasetsart University, Bangkok, Thailand |
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| Abstract: | Improper cooling of cooked rice at an inappropriate temperature or leaving cooked rice at room temperature can cause food poisoning attributed to Bacillus cereus. Natural food preservative of either squid or crab polymer chitosan solution was added to examine their antibacterial properties against Bacillus cereus in cooked rice during storage at 37 and 4 °C. Both types of chitosan could retard the growth of B. cereus and total aerobic counts in cooked rice stored at 37 °C up to 1 day. In addition, the effect of chitosans on the physical and textural properties of cooked rice during storage was studied. Both chitosans slightly increased the moisture content of cooked rice. However, chitosans had no effect on the whiteness and hardness of cooked rice during storage (P > 0.05). Therefore, both chitosans have a potential to be used as food preservative for cooked rice with no negative effects on rice quality. |
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| Keywords: | antimicrobial activity chitosan rice shelf life texture |
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