To apply UV-C as a non-heating sterilization method to increase the microbiological safety of fresh seedless watermelon products, reductions in E. coli and quality changes by treatment dose (0, 2, 4, 8, 14, 20 kJ/m2) were investigated. The pH, sugar content, and hardness of watermelon inoculated with E. coli were not significantly different according to the UV-C treatment dose, but the polyphenol content was significantly decreased compared to the controls (425.4 GAE μg/g F.W.). When treated with 2 and 4 kJ/m2, the lycopene content was 31.6 and 30.9 μg/g F.W., respectively, which was increased compared to the controls (28.5 μg/g F.W.). The arginine and citrulline content was also significantly increased compared to the controls. The number of E. coli was significantly decreased compared to the controls following UV-C treatment. Considering the degree of E. coli reduction, lycopene content, arginine content, citrulline content, and UV-C irradiation time, subsequent experiments were conducted by selecting a UV-C treatment dose of 2 kJ/m2. The results of confirming the degree of reduction in the number of E. coli colonies by a single treatment and combined treatment with UV-C 2 kJ/m2 and 70% ethanol showed that the combined treatment was most effective as colonies were decreased by 2.3 log CFU/g compared to the controls. Therefore, it is judged that UV-C 2 kJ/m2 radiation and combined treatment with 70% ethanol could be applied as a non-heating sterilization method for fresh watermelon slices.

Abstract
서 론
재료 및 방법
    1. 실험재료 및 전처리
    2. 대장균 배양 및 접종
    3. UV-C, 에탄올 처리
    4. 분석 시료
    5. 이화학 분석
    6. 대장균 수
    7. 라이코펜 함량
    8. 시트룰린 및 아르기닌 함량
    9. 통계분석
결과 및 고찰
    1. UV-C 처리 선량에 따른 신선편이 수박의 품질 특성
    2. UV-C, 에탄올 단일 및 병합 처리에 따른 신선편이 수박의 품질 특성
요약 및 결론
감사의 글
References

• 한현아(전라북도농업기술원 작물식품과 지방농업연구사) | Hyun Ah Han (Researcher, Division of Crops & Food, Jeollabuk-do Agricultural Research & Extension Services, Iksan 54968, Korea) Corresponding author
• 조승현(전라북도농업기술원 수박시험장 지방농업연구사) | Seung-Hyun Jo (Researcher, Watermelon Experiment Station, Jeollabuk-do Agricultural Research & Extension Services, Gochang 56469, Korea)
• 이송이(전라북도농업기술원 작물식품과 지방농업연구사) | Song-Yee Lee (Researcher, Division of Crops & Food, Jeollabuk-do Agricultural Research & Extension Services, Iksan 54968, Korea)
• 김은주(전라북도농업기술원 작물식품과 지방농업연구사) | Eun-Ju Kim (Researcher, Division of Crops & Food, Jeollabuk-do Agricultural Research & Extension Services, Iksan 54968, Korea)
• 송은주(전라북도농업기술원 작물식품과 지방농업연구관) | Eun-Ju Song (Senior Researcher, Division of Crops & Food, Jeollabuk-do Agricultural Research & Extension Services, Iksan 54968, Korea)