Changes of Quality and Astringency of Persimmons due to Modified Atmosphere Packaging

떫은감의 MAP 탈삽에 따른 품질특성 변화

  • Seong, Jong-Hwan (Department of Food Science & Technology, Pusan National University) ;
  • Goo, Mee-Suk (Miryang Agricultural Technology Center) ;
  • Chung, Hun-Sik (Food and Bio-Industry Research Institute, Kyungpook National University)
  • 성종환 (부산대학교 식품공학과) ;
  • 구미숙 (밀양시 농업기술센터) ;
  • 정헌식 (경북대학교 식품생물산업연구소)
  • Published : 2008.04.28

Abstract

We investigated the effect of modified atmosphere packaging (MAP) on the removal of astringency and overall quality of astringent persimmons (Diospyros kaki T. cv. Miryangbansi). Persimmons were packaged in 0.08, 0.10, or 0.12 mm low-density polyethylene film and then stored at $0^{\circ}C$ for up to 100 days. Concentrations of $O_2$ and $CO_2$ in the packaging maintained lower and higher as the film thickness increased Weight loss was strongly retarded by all three MAP films. Soluble tannin content decreased as the film thickness increased. The astringency of persimmons disappeared after 60-70 days in 0.12 mm film, after 80 days in 0.10 mm film, but did not disappear after 100 days in 0.08 mm film Loss of flesh firmness and decline in external appearance were slower in persimmons in 0.08 and 0.10 mm films than in those in 0.12 mm film. Our results show that 0.10 mm LDPE films can be effective for maintaining the quality and removal of the astringency of astringent persimmons.

떫은감(Diospyros kaki T.)의 탈삽과 저장 병용 MAP 조건을 설정하기 위하여, '밀양반시'를 0.08 mm, 0.10 mm 또는 0.12 mm 두께의 LDPE 필름으로 열접착 밀봉포장하고 $0^{\circ}C$에서 100일간 저장하면서 포장 내부의 기체조성과 과실의 품질특성을 조사하였다. 포장 내부의 산소와 이 산화탄소농도는 경시적으로 각각 낮아지고 높아져 저장 10일 후 평형상태에 도달하였고, 평형농도는 포장재가 두꺼울수록 산소는 낮고 이산화탄소는 높은 경향을 나타내었다. 과실의 중량감소율은 포장재 두께의 영향이 없이 극미한 값을 보였다. 가용성 탄닌 함량은 포장재가 두꺼울수록 감소가 빠르게 진행되어서, 삽미가 0.10 mm 포장구는 80일경 에 0.12 mm 포장구는 $60{\sim}70$일경에 제거되었으나 0.08 mm 포장구는 저장말기까지 잔존하였다. 과육경도는 0.12 mm 포장구보다 0.08 mm와 0.10 mm 포장구에서 감소가 억제되었다. 외관은 0.12 mm 포장구보다 0.08 mm와 0.10 mm 포장구가 장기간 양호한 상태를 유지하였다. 이로써 MAP는 '밀양반시'의 탈삽과 품질유지에 유용하며, 0.10 mm 두께의 포장재가 적합한 것으로 판단되었다.

Keywords

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