LAPSE:2020.0518
Published Article
LAPSE:2020.0518
Effects of Low-Temperature Drying with Intermittent Gaseous Chlorine Dioxide Treatment on Texture and Shelf-Life of Rice Cakes
May 22, 2020
We investigated the effect of chlorine dioxide (ClO2) under low temperature drying to suppress rice cake stickiness during the cutting process by initiating the onset of retrogradation until the stickiness is minimized for shelf-life extension. The intermittent ClO2 application at low-temperature drying was conducted at 10 °C for different drying periods (0, 6, 12, 18, and 24 h). Texture analysis showed significant differences with increasing values of hardness (901.39 ± 53.87 to 12,653 ± 1689.35 g) and reduced values of modified adhesiveness (3614.37 ±578.23 to 534.81 ± 89.37 g). The evaluation of rice cake stickiness during the cutting process revealed an optimum drying period of 18 h with no significant difference (p ≤ 0.05) compared to the 24 h drying process. Microbial contamination during the drying process increased, with microbial load from 6.39 ± 0.37 to 7.94 ± 0.29 CFU/g. Intermittent ClO2 application at 22 ppm successfully reduced the microbial load by 63% during drying process. The inhibitory property of ClO2 was further analyzed on a sample with high initial microbial load (3.01 ± 0.14 CFU/g) using primary and modified secondary growth models fitted to all experimental storage temperatures (5−25 °C) with R2 values > 0.99. The model demonstrated a strong inhibition by ClO2 with microbial growth not exceeding the accepted population threshold (106 CFU/g) for toxin production. The shelf-life of rice cake was increased by 86 h and 432 h at room temperature (25 °C) and 5 °C respectively. Microbial inactivation via ClO2 treatment is a novel method for improved food storage without additional thermal sterilization or the use of an additional processing unit.
Keywords
cutting analysis, image processing, intermittent ClO2 drying, microbial growth model
Subject
Suggested Citation
Oyinloye TM, Yoon WB. Effects of Low-Temperature Drying with Intermittent Gaseous Chlorine Dioxide Treatment on Texture and Shelf-Life of Rice Cakes. (2020). LAPSE:2020.0518
Author Affiliations
Oyinloye TM: Department of Food Science and Biotechnology, College of Agricultural and Life Science, Kangwon National University, Chuncheon 24341, Korea [ORCID]
Yoon WB: Department of Food Science and Biotechnology, College of Agricultural and Life Science, Kangwon National University, Chuncheon 24341, Korea; Elderly-Friendly Food Research Center, Agriculture and Life Science Research Institute, Kangwon National Universit [ORCID]
Journal Name
Processes
Volume
8
Issue
3
Article Number
E375
Year
2020
Publication Date
2020-03-23
Published Version
ISSN
2227-9717
Version Comments
Original Submission
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PII: pr8030375, Publication Type: Journal Article
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LAPSE:2020.0518
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doi:10.3390/pr8030375
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May 22, 2020
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CC BY 4.0
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May 22, 2020
 
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May 22, 2020
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Original Submitter
Calvin Tsay
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