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에틸렌 처리 및 단기저장 온도에 따른 ‘부유’ 단감의 숙성반응 및 품질변화
박윤문(Youn Moon Park),이용재(Yong Jae Lee) 한국원예학회 2006 원예과학기술지 Vol.24 No.2
‘Fuyu’ persimmon fruits were harvested at commercial maturity, exposed to exogenous ethylene for one day, and then put on the shelf under different temperature conditions to elucidate physiological response and postharvest quality changes. Effects on ripening events were discriminated between ethylene treatment and shelf temperature through two-way analysis of variance. Exogenous ethylene at 10 μL L?¹ level induced significantly higher ethylene evolution and respiration rates, whereas effects of 1 μL L?¹ ethylene treatment were slight. Level of exogenous ethylene to induce ethylene production and respiratory changes appeared to be in the range of 1 and 10 μL L?¹. Unlike physiological metabolism, flesh firmness was significantly reduced even by 1 μL L?¹ ethylene treatment indicating that critical exogenous ethylene level hastening cell wall metabolism as related to fruit softening seemed to be lower than 1 μL L?¹. Effects of storage temperature were significant on the changes in respiration rates, while the effects were minimal and occasional on the changes in ethylene evolution and flesh softening. Coloration, in contrast, was influenced by both the external ethylene and storage temperature at the similar significant level. Effects of the two factors on the changes in soluble solid concentrations were not consistent. Responsiveness to exogenous ethylene and storage temperature in ‘Fuyu’ persimmon may differ according to respective ripening events.
큰느타리버섯의 controlled atmosphere 저장환경과 유통온도가 품질에 미치는 영향
박윤문(Youn-Moon Park),전창성(Chang-Sung Jhune) 한국원예학회 2010 원예과학기술지 Vol.28 No.1
Changes in quality of king oyster mushrooms (Pleurotus eryngii) were investigated under controlled atmosphere (CA) storage and simulated marketing conditions to provide basic ideas for modified atmosphere packaging (MAP) application during export process. Mushrooms were harvested on Nov. 9, precooled to 4℃ within 4 h, and then stored under two CA regimens with different CO₂ conditions; 5 ㎪ O₂ + 10 ㎪ CO₂ and 5 ㎪ O₂ + 15 ㎪ CO₂. Storage temperature was maintained at 0.5℃ with 95% RH. After 3 and 4 week storage, mushrooms were removed from the CA, packaged into polypropylene container, and then put on the shelf for 5 and 7 days at 20℃ and 7℃, respectively. Beneficial effect of 15 ㎪ CO₂ CA was very limited on the reduction of stem browning ratings, which was significant only at 5 days on the shelf after 4-week storage. High CO₂ CA storage tended to reduce ethanol accumulation inside packages during 20℃ shelf life, with no effect on off-flavor rating. In contrast, low shelf temperature significantly maintained better sensory and physicochemical quality attributes, and overall marketability. The results suggest different potentials for shipping plus marketing period by shelf temperature regardless of high CO₂-CA conditions; 3-week shipping + 5-day marketing period when 20℃ shelf temperature is unavoidable, whereas, under 7℃ marketing conditions, the potential period could be extended to > 4-week shipping + 7-day marketing period.
모의 수출 ‘후지’ 사과의 품질에 미치는 수확후 1-MCP 처리 및 CA저장 효과
박윤문(Youn-Moon Park),박효근(Hyo Geun Park),임병선(Byung-Sun Lim) 한국원예학회 2011 원예과학기술지 Vol.29 No.3
Effects of 1-methylcyclopropene (1-MCP) treatment and controlled atmosphere (CA) storage was analyzed for the export quality of ‘Fuji’ apples after 8-month storage. Apples were harvested from two orchards located in different regions at relatively late stage of maturity for long-term storage. Fruit were treated with 1 ㎕ㆍℓ?¹ 1-MCP and then stored in 0℃ air or CA with 1.5 ㎪ O₂ and < 1.0 ㎪ CO₂ for 8 months. To simulate poststorage export process such as 2-week refrigerated container shipment plus 7-day local distribution, fruit were put in 0℃ air storage for additional two weeks and then on the shelf for 7 days at 20℃. Both the 1-MCP treatment and CA storage reduced respiration and ethylene evolution after storage and shipping simulation, and successfully maintained titratable acidity and flesh firmness even after the export process. In ‘Fuji’ apples harvested after adequate stage of maturity for long-term storage, however, 1-MCP treatment alone seemed not to be satisfactory for the maintenance of sensorial fruit texture for export market. CA storage or 1-MCP treatment/CA storage combination program should be applied for lately harvested ‘Fuji’ apples exported after eight months storage.
수확후 1-MCP 처리, 저장 방법 및 현지 유통온도가 모의수출 ‘감홍’ 사과의 품질에 미치는 영향 분석
박윤문(Youn-Moon Park),윤태명(Tae-Myung Yoon) 한국원예학회 2012 원예과학기술지 Vol.30 No.6
Effects of postharvest 1-methylcyclopropene (1-MCP) treatment, controlled atmosphere (CA) storage, and shelf temperature on quality of ‘Gamhong’ apples were analyzed during export simulation. Fruits were harvested at the optimum maturity for long-term storage, treated with 1 μL·L<SUP>-1</SUP> 1-MCP for 16 hours, and then stored for 6 months under air and CA conditions at 0℃. Poststorage export procedure was performed by applying additional 2-week refrigerated storage and 7-day shelf-life test at 7 and 20℃, which simulated container shipment and local distribution, respectively. After storage and during export simulation, rates of respiration and ethylene evolution were significantly lower in 1-MCP treated and CA-stored apples. For the reduction of respiration, CA storage was more effective than 1-MCP treatment. Soluble solids content was maintained higher in 1-MCP treated apples, while titratable acidity was maintained better both in the 1-MCP treated and CA-stored apples. Effects of 1-MCP treatment and CA storage were highly significant in maintaining flesh firmness and sensory texture ratings. Additive effects from combined application of 1-MCP treatment and CA storage were occasionally observed. Shelf temperature during the local distribution simulation seemed not to significantly influence quality changes only showing limited effects on flesh firmness. Overall results suggest that storage potential of ‘Gamhong’ apples is shorter than 4 months in control fruit under refrigerated air conditions, whereas the potential can be extended to longer than 6 months by 1-MCP treatment and CA storage. Postharvest program should be provided considering the time of export, i.e. period of storage, and duration of local distribution.