Food Science and Preservation (한국식품저장유통학회지)

  • 제14권6호
  • /
  • Pages.669-675
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  • 2007
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  • 3022-5477(pISSN)
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  • 3022-5485(eISSN)
The Korean Society of Food Preservation (한국식품저장유통학회)
권호 표지

Quality Characteristics of Chitosan-ascorbate Treated Kwamaegi Prepared by Vacuum Drying, and Lowering Effect of Serum Lipids in Rats Fed High Fat Diets

Chitosan-ascorbate 처리 감압건조 과메기의 품질특성과 고지방식이 흰쥐의 혈청지질에 미치는 영향

  • Shin, Kyung-Ok (Department of Food Science and Technology, Faculty of Food Industrial Technology, Catholic University of Daegu) ;
  • Oh, Seung-Hee (Department of Diet and Culinary Art Pohang College) ;
  • Kim, Sood-Dong (Department of Food Science and Technology, Faculty of Food Industrial Technology, Catholic University of Daegu)
  • 신경옥 (대구가톨릭대학교 식품외식산업학부 식품공학) ;
  • 오승희 (포항1대학 다이어트과학계열 식품영양) ;
  • 김순동 (대구가톨릭대학교 식품외식산업학부 식품공학)
  • 발행 : 2007.12.31
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초록

Quality characteristics of Kwamaegi (semi-dried saury) prepared by treatment of chitosan-ascorbate (CA) and vacuum drying at $40{\sim}60^{\circ}C$(VDK), and the effect of the Kwamaegi on serum lipid profiles and anti-oxidation-related enzyme activity in rats fed high fat diets were investigated. The preparation periods were $4.5{\sim}8.3$ hr in VDK, while naturally dried Kwamaegi (NDK) took 360480 hr. Total microbe contents of VDK and NDK were $0.2{\sim}0.5$ and 8.2 log CFU/g, respectively. There was no significant difference in amino-nitrogen content. Compared with NDK, the acid and peroxide value, and fishy flavor of VDK40 (dried at $40^{\circ}C$) were significantly lower, and the texture, color and overall acceptability were higher. In animal experiments, weight gain, content of LDL-cholesterol and lipid peroxide, activities of total (T) and O type (O) xanthine oxidase, and the O/T ratio (%) were significantly lower in the VDK40 diet group than in the NDK diet group. The content of HDL-cholesterol in the VDK40 diet group was higher than in the NDK diet group. These results suggest that preparing CA-treated Kwamaegi with vacuum-drying at $40^{\circ}C$ can be applied throughout the year, and may shorten preparation time and improve its microbiological safety and nutritional values.

Chitosan-ascorbate (CA)를 표면처리한 후 $40{\sim}60^{\circ}C$에서 감압건조한 과메기(VD-과메기)의 품질특성과 고지방식이 흰쥐의 혈청지질과 항산화계 효소활성에 미치는 영향을 조사하였다. VD-과메기의 제조기간은 $4.5{\sim}8.3시간, 자연건조과메기(ND-과메기)의 제조기간 $360{\sim}480$시간이었다. 총 균수는 VD-과메기에서는 $0.2{\sim}0.5$ log CFU/g, ND-과메기에서는 8.2 log CFU/g였다. 아미노태질소 함량은 $128.3{\sim}135.0$mg%로 ND-과메기와 VD-과메기의 뚜렷한 차이가 없었다. VD-과메기는 ND-과메기에 비하여 산가와 과산화물가가 현저하게 낮으며 비린내가 적고 조직감, 색상 및 종합적기 호도가 높았으며 종합적으로는 $40^{\circ}C$에서 제조한 VD-40-과메기가 가장 우수하였다. 고지방식이 흰쥐에 감압건조한 VD-40-과메기를 10% 혼합하여 4주간 급여한 군 (HVK)은 ND-과메기에 비하여 증체량이 낮고, 혈청 HDL-cholesterol 함량은 높은 반면 total cholesterol과 LDL-cholesterol함량이 낮았으며, glutathione 함량은 뚜렷한 차이가 없으나 lipid peroxide 함량은 현저하게 낮았다. 또한 고지방식이로 증가된 간의 xanthine oxidase total 및 O type 활성도 및 O/T(%)를 유의적으로 감소시켰다. 이상의 결과, 과메기 제조시 CA를 처리한 후 $40^{\circ}C$서 감압건조하는 방법은 제조기간을 크게 단축시킬 뿐만 아니라 과메기의 위생성과 영양성을 높일 수 있는 방법으로 산업적 활용이 기대된다.

키워드

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