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Subject

Effect of Low Temperature Storage on Proteolytic and Antioxidant Activities of Fresh Pineapple and Kiwi Juices Extracted by Slow-Speed Masticating Household Juicer
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저속압착방식으로 착즙한 파인애플 및 키위 주스의 저온저장 조건에 따른 단백질분해효소 및 항산화 활성

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Type
Academic journal
Author
Shin-Young Park (인제대학교) Min-Ju Kim (휴롬) Ji-In Park (인제대학교) Jung-In Kim (인제대학교) Myo-Jeong Kim (인제대학교)
Journal
The korean Society of Food Science and Nutrition Journal of the Korean Society of Food Science and Nutrition Vol.45 No.9 KCI Accredited Journals SCOPUS
Published
2016.9
Pages
1,316 - 1,323 (8page)

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Effect of Low Temperature Storage on Proteolytic and Antioxidant Activities of Fresh Pineapple and Kiwi Juices Extracted by Slow-Speed Masticating Household Juicer
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The aim of this study was to evaluate proteolytic and antioxidant activities of fresh pineapple and kiwi juices extracted using a slow-speed masticating household juicer during low temperature storage. While over 90% of vitamin C and total polyphenols in both juices were retained after storage for 30 days at -20°C, reduction of 56.8% for vitamin C and 31.9% for total polyphenols in pineapple juice were detected after storage at 4°C. In the case of kiwi juice, 32.9% of vitamin C and 22.4% of total polyphenols were lost. A high initial content of vitamin C in kiwi juice resulted in a slower reduction rate than that for pineapple juice. A similar result was obtained for 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity. Proteolytic activities of both juices were maintained efficiently with less than 10% loss during storage for 30 days at -20°C. Protease stability of pineapple juice was better than that of kiwi juice during storage at 4°C, and the same result was obtained when boiled chicken breast was used as a substrate. From these results, when storing pineapple and kiwi juices, which are widely used as a natural meat tenderizer and digestive aid, cold storage at -20°C seemed to be more suitable for maintaining antioxidant and proteolytic activities than cold storage at 4°C.

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UCI(KEPA) : I410-ECN-0101-2017-594-001400026