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http://dx.doi.org/10.3746/jkfn.2004.33.4.687

Effects of Combined Treatment of Gamma Irradiation and Addition of Rosemary Extract Powder on Ready-to-Eat Hamburger Steaks: I. Microbiological Quality and Shelf-life  

오상희 (한국원자력 연구소 방사선식품ㆍ생명공학연구팀)
김장호 (한국원자력 연구소 방사선식품ㆍ생명공학연구팀)
이주운 (한국원자력 연구소 방사선식품ㆍ생명공학연구팀)
이유석 (한국원자력 연구소 방사선식품ㆍ생명공학연구팀)
박경숙 (세종대학교 생활과학과)
김종군 (세종대학교 생활과학과)
이효구 (공주대학교 식품공학과)
변명우 (한국원자력 연구소 방사선식품ㆍ생명공학연구팀)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.33, no.4, 2004 , pp. 687-693 More about this Journal
Abstract
The objective of this study was to evaluate the combined treatment effect of gamma irradiation and rosemary extract powder on ready-to-eat hamburger steaks. After irradiation at 5, 10 and 20 k㏉, hamburger steaks manufactured with rosemary extract powder (200 and 500 ppm) were stored at 5$^{\circ}C$ for 4 months and at 3$0^{\circ}C$ for 3 weeks. Total aerobic bacteria count of the ready-to-eat hamburger steak was approximately 5 log CFU/g level. All doses of gamma irradiation were effective in reducing the population of total aerobic bacteria and coliform bacteria in hamburger steaks. In hamburger steaks irradiated at 20 k㏉, tile microbial growth was not observed during storage. The shelf-life of hamburger steaks were determined by microbiological counts of 10$^{6}$ ∼10$^{7}$ CFU/g and those of the steaks irradiated at 0, 5 and 10 k㏉ were ranged among 14, 28∼42 and 98∼112 days, respectively. The shelf-life of both irradiated hamburger steaks added with 500 ppm rosemary extract powder at 5 and 10 k㏉ was extended more 14 days than non-added sample. Results suggested that both gamma irradiation and rosemary extract powder may improve the shelf-stability of ready-to-eat ham-burger steak. However, when the storage temperature was abused (3$0^{\circ}C$), the rosemary extract powder had not sufficient effect on the shelf- stability of hamburger steaks.
Keywords
hamburger steak; gamma irradiation; rosemary extract; microbiological; shelf-life;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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