Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effects of Packaging Method on Quality of Chilled Plaice Muscle

포장방법이 냉장어육의 품질에 미치는 영향

  • Published : 2003.12.01
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Abstract

The purpose of this study is to investigate the changes of physico-chemical properties of chilled plaice muscle, stored at 4$^{\circ}C$ for 0 ∼ 21 days, with different packaging methods (vacuum packaged with PVDC and aerobic packaged with HDPE). pH value in aerobic packaged plaice muscle (APPM) decreased from 6.3 to 6.09 at first 2 day storage, and then increased gradually during storage time. Although pH pattern of vacuum packaged plaice muscle (VPPM) was similar to that of APPM, change of pH value during storage time was slower and lower than APPM. VBN value in aerobic packaged one increased during storage time. Especially it increased significantly after 7 days of storage. While VBN value in VPPM increased only a little to 14 days. TBA value showed significant difference between APPM and VPPM. WHC of APPM was higher than that of VPPM after 7 days of storage. In electrophoretic pattern of myofibril of APPM stored for 14 days hydrolysis of heavy chain and tropomyosin was observed. However, in VPPM, some hydrolysis occurred only in heavy chain. SDS-PAGE analysis showed that hydrolysis of VPPM occurs later than that of APPM.

본 연구는 신선어육의 저장효과를 높이기 위하여 포장방법을 달리하여 이화학적 성질을 조사한 결과이다. 신선한 넙치육의 pH는 6.3에서 함기포장한 경우 냉장 2일에 6.09로 낮아졌다가 그 이후 계속적인 상승을 보였으며, 진공포장의 경우는 경향은 비슷하나 함기 포장에 비해 저장기간에 따른 pH의 변화가 매우 느리고 상승속도도 작았다. VBN값은 함기포장의 경우 저장기간에 따라 증가하였으며 특히 7일 이후부터는 매우 급격한 증가를 나타냈다. 반면에 진공포장육은 저장 14일까지는 저장초기 에 비해 약간의 증가를 나타낸 이후 급격한 증가를 나타내 함기포장과는 뚜렷한 차이를 나타내었다. TBA가는 저장 전기간동안 진공포장의 경우 상당히 낮게 나타난 반면, 함기포장은 저장 4일 이후 급격한 증가를 나타내 포장에 따른 차이를 뚜렷하게 나타내었다. 보수성에서는 함기포장과 진공포장 둘 다 저장 7일까지는 유사한 변화를 나타내었지만, 저장 7일 이후부터는 함기포장이 진공포장에 비해 상당히 높은 증가를 보이며 유의적인 차이를 나타내었다. 근원섬유단백질의 전기영동상에 있어서는 함기포장육의 경우 저장 14일 MF의 heavy chain과 35 kDa인 tropomyosin이 분해됨을 나타내었는데 비해, 진공포장육은 저장 14일에도heavy chain의 분해만이 조금 일어나 근원섬유단백질의 분해가 함기포장에 비해 천천히 일어남을 보였다.

Keywords

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