Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Active MA Mini-packaging on Shelf-life Maintenance during Marketing of Perilla Leaves

깻잎의 active MA 소포장이 유통기간 중 신선도 유지에 미치는 영향

  • Jeong, Cheon-Soon (Department of Horticulture Science, Kangwon National University) ;
  • Um, Gi-Jeung (Climate Change Research Institute of Korea) ;
  • Park, Jong-Nam (Department of Farm Assistance, Agricultural Technology and Extension Center)
  • 정천순 (강원대학교 원예학과) ;
  • 엄기증 (한국기후변화대응연구센터) ;
  • 박종남 (강원도 양구군 농업기술센터)
  • Received : 2010.07.08
  • Accepted : 2010.10.02
  • Published : 2010.12.31
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Abstract

Research regarding respiration rate, off-flavor related material and freshness maintenance effect of active MA mini-packaging on perilla leaves has been carried in this study. Respiration rate was highly maintained at high oxygen treatments ($CO_2:O_2:N_2$=0:30:70 and 0:50:50), higher than non-treatment and low oxygen treatments (6:2:92, 0:10:90) during the storage period, and ethylene production was relatively higher. However, off-flavor related materials, acetaldehyde and ethanol production was noticeably low. Weight losses of non-treatment and low-oxygen treatment were about 1.8 and 1.4%, respectively. At the fifth day of storage there was no weight loss. Ascorbic acid content was 13.3 mg/100 g F.W. at the first day of storage. At the third day of storage non-treatment showed the lowest value of ascorbic acid, 8.8 mg/100 g F.W. Ascorbic acid content of active MA treatment gradually decreased without a striking difference as the storage day extended. Chlorophyll content was the lowest at the fifth day of storage with non-treatment, 47.5 (SPAD-502 unit) while the active MA treatment maintained high level of chlorophyll content, 53.0. Sensory evaluation (vision) showed that marketability gradually decreased but was maintained in high oxygen treatments (0:30:70 and 0:50:50), even at the fifth day of storage. Occurrence of off-flavor in non-treatment at the fifth day of storage was extremely low, 2.6; whereas high in high oxygen treatment, 3.4. Active MA packaging maintained freshness two more days at room temperature (about $27^{\circ}C$).

깻잎을 active MA 소포장 후 실온(약 $27^{\circ}C$)에서 호흡, 이취 관련 물질 및 신선도 유지효과에 관한 연구결과는 다음과 같다. 저장기간 중 호흡율은 무처리 및 저산소 처리구($CO_2:O_2:N_2$=6:2:92, 0:10:90) 보다 고산소 처리구(0:30:70 및 0:50:50)에서 높게 유지되었고, 에틸렌 발생도 다소 높았다. 그러나 이취관련 물질인 아세트알데히드 및 에탄올 발생은 고산소 처리구에서 현저하게 낮았다. 중량감소율은 무처리 및 저산소 처리구에서 약 1.8%, 고산소 처리구에서는 1.4%로 낮았지만, 저장 5일째는 유사한 경향을 나타냈다. Ascorbic acid 함량은 저장 1일에 13.3mg/100g F.W.이었고, 저장 3일에 무처리구에서 8.8mg/100g F.W.으로 가장 낮았으나, active MA 처리구에서는 커다란 차이 없이 저장기간이 길어짐에 따라 다소 감소하는 경향을 보였다. 엽록소 함량은 저장 5일째는 무처리구에서 47.5(SPAD-502 unit)로 가장 낮았고, active MA 처리구에서는 약 53.0 수준으로 높게 유지되었다. 관능 평가(시각)에서 저장기간 동안 서서히 감소되어 고산소 처리구(0:30:70 및 0:50:50)에서 저장 5일에 2.8로 상품성을 유지하였지만, 무처리 및 저산소 처리구에서는 상품성을 상실하였다. 이취발생은 저장 5일에 무처리구에서는 2.6으로 매우 낮았고, 고산소 처리구에서는 3.4 수준으로 높았다. 따라서 깻잎을 active MA 포장할 경우 실온에서(약 $27^{\circ}C$) 일반 MA포장 보다는 2일정도 더 신선도 유지효과가 있었다.

Keywords

References

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