The effects of UV-C irradiation on the quality characteristics of powdered foods, sunsik and misutkaru, were examined during storage, where samples were irradiated at doses of 27, 54, and 108 kJ/$m^2$, respectively. In addition, sunsik and misutkaru samples were inoculated with Enterobact...
The effects of UV-C irradiation on the quality characteristics of powdered foods, sunsik and misutkaru, were examined during storage, where samples were irradiated at doses of 27, 54, and 108 kJ/$m^2$, respectively. In addition, sunsik and misutkaru samples were inoculated with Enterobacter sakazakii as a pathogen and then irradiated at doses of 0.5, 1, and 5 kJ/$m^2$, respectively. After treatment, the sunsik and misutkaru samples were stored at $20^{\circ}C$. The microbiological data represented that populations of total aerobic bacteria, Bacillus cereus, and E. sakazakii were significantly (p<0.05) reduced with increasing UV-C doses. In addition, UV-C irradiation did not cause inferiority in the color quality of the samples during storage. Sensory evaluation results also indicated that there were no significant differences (p<0.05) among the irradiated samples. These results suggest that UV-C irradiation may be useful in maintaining the quality of sunsik and misutkaru during storage.
The effects of UV-C irradiation on the quality characteristics of powdered foods, sunsik and misutkaru, were examined during storage, where samples were irradiated at doses of 27, 54, and 108 kJ/$m^2$, respectively. In addition, sunsik and misutkaru samples were inoculated with Enterobacter sakazakii as a pathogen and then irradiated at doses of 0.5, 1, and 5 kJ/$m^2$, respectively. After treatment, the sunsik and misutkaru samples were stored at $20^{\circ}C$. The microbiological data represented that populations of total aerobic bacteria, Bacillus cereus, and E. sakazakii were significantly (p<0.05) reduced with increasing UV-C doses. In addition, UV-C irradiation did not cause inferiority in the color quality of the samples during storage. Sensory evaluation results also indicated that there were no significant differences (p<0.05) among the irradiated samples. These results suggest that UV-C irradiation may be useful in maintaining the quality of sunsik and misutkaru during storage.
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제안 방법
The sensory evaluation results during storage of the sunsik and misutkaru samples are shown in Tables 5 and 6, respectively. Sensory qualities such as freshness, decay, and odor were examined among the treatments. During 4 weeks of storage there were no significant (p<0.
However, few studies have been conducted to examine the application of UV-C irradiation in powdered foods. Therefore, in this study, UV-C irradiation treatments were applied as a processing method to examine their effects on microbial inactivation and sensory quality in sunsik and misutkaru samples during storage.
대상 데이터
The UV-C irradiated samples (not inoculated with E. sakazakii) were analyzed for their freshness, decay, odor, and overall acceptability by 10 trained panelists (3 men; 7 women; age range, 23 to 29). Color changes and microbial decay during storage were assessed visually in the UV-C irradiated samples and were compared to non-irradiated samples.
데이터처리
A,BAny means in the same column followed by different letters are significantly (p<0.05) different by Duncan's multiple range test.
A-CAny means in the same column followed by different letters are significantly (p<0.05) different by Duncan's multiple range test.
A-DAny means in the same column followed by different letters are significantly (p<0.05) different by Duncan's multiple range test.
To analyze the results, analysis of variance and Duncan’s multiple range tests were performed using the SAS program (16).
성능/효과
cereus in the non-irradiated and irradiated samples increased. After 8 weeks of storage, populations of B. cereus in the non-irradiated samples increased to 5.33 log CFU/g, while those in the samples irradiated at 108 kJ/m2 reached 4.30 log CFU/g, indicating a slight difference in microbial reduction during storage. Kim et al.
For the misutkaru, populations of total aerobic bacteria and B. cereus were reduced to 4.82 and 4.06 log CFU/g with irradiation at 108 kJ/m2, respectively, indicating that the 108 kJ/m2 UV-C treatment level decreased the populations of total aerobic bacteria and B. cereus by about 1 log cycle (Table 2). During storage of the misutkaru, the population of total aerobic bacteria did not change significantly (p<0.
From the results, the population of total aerobic bacteria in the sunsik samples was 2.94 log CFU/g, while the population of B. cereus was below the detection limit (2 CFU/g) (Table 1). In contrast, for the misutkaru, these levels were 5.
23 log cycle compared to the non-irradiated sample. In addition, during storage, the population of E. sakazakii for the non-irradiated sample decreased to 6.50 log CFU/g after 8 days, while it reached 5.31 log CFU/ in the sample irradiated at 5 kJ/m2, indicating that the initial microbial inactivation resulting from UV-C treatment was maintained. Lyon et al.
참고문헌 (23)
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