Food Science and Preservation (한국식품저장유통학회지)

The Korean Society of Food Preservation (한국식품저장유통학회)
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Effect of pretreatment and packaging methods on quality of cold vacuum dried peach

전처리 및 포장방법이 냉풍감압건조 복숭아의 품질에 미치는 영향

  • Kwon, Gi-Man (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Kim, Jae-Won (Department of Food Science and Technology, Catholic University of Daegu) ;
  • Youn, Kwang-Sup (Department of Food Science and Technology, Catholic University of Daegu)
  • 권기만 (대구가톨릭대학교 식품공학전공) ;
  • 김재원 (대구가톨릭대학교 식품공학전공) ;
  • 윤광섭 (대구가톨릭대학교 식품공학전공)
  • Received : 2013.04.03
  • Accepted : 2013.06.20
  • Published : 2013.06.30
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Abstract

This study was conducted to investigate the effects of pretreatment and different packaging methods on the physicochemical properties of cold vacuum-dried peaches. All the dried peach samples were stored such as $N_2$ gas substitution, vacuum and passive packaged with polyethylene (PE) film and oriented polypropylene (OPP)/aluminum (Al)/PE film at $40^{\circ}C$ for 50 days. The weight change, pH, soluble solids content, titratable acidity, soluble solid-acid ratio (SS/TA), delta E, browning degree and phenolic compounds were analyzed. The weight change and pH were lower in the 0.1% vitamin C-treated group and were significantly lowest in the vacuum-treated OPP/AL/PE. The soluble solids content and the SS/TA were higher in the non-treated groups than in the vitamin C-treated groups. According to the packaging methods, the $L^*$ values were higher in the vacuum, $N_2$ gas and passive package, in that order. In addition, the browning degree and the delta E value were lower in the pretreated groups and significantly lowest in the vacuum-treated OPP/AL/PE with 0.1% vitamin C group. The phenolic compounds were high for the pretreated groups, according to the packaging methods (vacuum > $N_2$ gas> passive), and the OPP/AL/PE was significantly higher than the PE. These results suggest that different packaging materials and pretreatment methods affected the quality of the dried peaches, and the vacuum-OPP/AL/PE film packaging group showed a high quality.

전처리 유무와 포장방법에 따른 건조복숭아를 가속실험($40^{\circ}C$, 50일)하여 품질변화를 조사한 결과 중량 및 pH의 변화는 vitamin C 처리가 무처리에 비해 낮았으며, 충진방법에 따라서는 전반적으로 vacuum 처리가 passive 및 $N_2$ 처리방법에 비해 낮았다. 가용성고형분 함량은 polyethylene film에서 높았고, vacuum 처리가 passive 및 $N_2$ 처리방법에 비하여 높은 함량을 나타내었다. 적정산도의 경우는 OPP/Al/PE film이 polyethylene film다 높은 반면 vitamin C 처리 시 포장 재질 간에 유의한 수준의 값을 나타내어 vitamin C 처리가 저장 중에 온도에 의한 산의 손실을 억제하는 것으로 관찰되었다. 충진 방법에 따라서는 전반적으로 vacuum 및 $N_2$ 처리방법이 passive에 비해 높은 적정산도 값을 나타내었고, 식미와 관계가 있는 당산비에서는 vacuum 처리방법이 높은 값을 나타내었다. 색도의 변화는 전반적으로 vitamin C 처리가 무처리에 비해 낮은 변화를 보였으며 L 값, delta E 값 및 갈변도의 결과 OPP/Al/PE film 포장방법 및 vacuum 처리에서 갈변현상이 억제되는 것으로 관찰되었다. 전처리 방법에 따른 폴리페놀 및 플라보노이드 함량은 vitamin C 처리가 무처리에 비해 높은 함량을 나타내었으며, 포장재질에 따라서는 polyethylene film에 비하여 OPP/Al/PE film이 유의적으로 높은 함량을 나타내었다. 이상의 결과 무처리군의 passive 포장법에서는 갈변 및 품질열화현상이 높은 것으로 관찰되었으나 vitamin C 처리군의 vacuum-OPP/Al/PE film 포장은 갈변화 및 품질손상이 적게 관찰되어 품질유지 및 유통기간 연장을 위한 적정포장 방법이 될 것으로 사료된다.

Keywords

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