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Effects of Active MA Mini-packaging on Shelf-life Maintenance during Marketing of Perilla Leaves  

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)
Publication Information
Horticultural Science & Technology / v.28, no.6, 2010 , pp. 980-984 More about this Journal
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 $27^{\circ}C$).
Keywords
ascorbic acid; chlorophyll; off-flavor; Perilla frutesceus var. japonica HARA; respiration rate; weight loss;
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Times Cited By KSCI : 10  (Citation Analysis)
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