• Title/Summary/Keyword: 에틸렌 발생량

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Effect of Aminoethoxyvinylglycine Treatment on Lipid Material Changes in 'Hongro' Apples (Aminoethoxyvinylglycine 처리가 '홍로' 사과 표피의 지질물질 변화에 미치는 영향)

  • Jun, YoungKeun;Kang, InKyu;Choi, Cheol
    • Current Research on Agriculture and Life Sciences
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    • v.33 no.1
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    • pp.33-35
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    • 2015
  • This study investigated the effect of AVG treatment on lipid material changes in the 'Hongro' apple epidermis. The internal ethylene concentration in 'Hongro' apples treated with $200mL{\cdot}L^{-1}$ AVG and stored at room temperature after harvest was significantly lower than that in 'Hongro' apples treated with $20mL{\cdot}L^{-1}$ Ethephon and the controls. During the same period, the emission of wax after the AVG treatment was also significantly lower than that after the other treatments. In conclusion, treatment with $220mL{\cdot}L^{-1}$ AVG two weeks before harvesting was found to be effective in improving and maintaining the quality of the 'Hongro' apples. Reducing the level of internal ethylene can delay the aging of fruit and inhibit the accumulation of wax in the fruit epidermis.

Response of Early-season Asian Pear 'Hanareum' Treated with GA4+7 to Postharvest Application of 1-methylcyclopropene (1-MCP) (조생종 배 '한아름'에 대한 GA4+7 및 1-methylcyclopropene(1-MCP) 처리 반응)

  • Lee, Ug-Yong;Oh, Kwang-Suk;Lim, Byung-Sun;Wang, Mao-Hua;Hwang, Yong-Soo;Chun, Jong-Pil
    • Horticultural Science & Technology
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    • v.32 no.5
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    • pp.645-654
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    • 2014
  • This study was conducted to investigate the effect of 1-methylcyclopropene (1-MCP, $1.0{\mu}L{\cdot}L^{-1}$), a known ethylene action inhibitor, on fruit quality and incidence of physiological disorders during a simulated marketing period at $25^{\circ}C$ for 20 days in early-season Asian pear (Pyrus pyrifolia Nakai) 'Hanareum' that had been treated with 0, 0.5, 1.2 or 2.4% $GA_{4+7}$. Weight loss of stored fruits increased with $GA_{4+7}$ concentration, and the 1-MCP treatment slightly reduced the weight loss rates during the marketing period. Flesh firmness decreased abruptly in all 1-MCP-untreated fruits as the storage period extended to 10 d, whereas the firmness of 1-MCP-treated fruits remained high (> 30 N) during 15 days shelf-life. The effect of 1-MCP was significantly reduced when fruits were subjected to increased GA concentration. Higher soluble solids content and acidity during extended shelf-life were also apparent in 1-MCP-treated 'Hanareum' pears. The L-values (lightness) and hue angles of 1-MCP treated samples were higher than those of controls during 20 days shelf-life, but the a-value (redness) was lower in 1-MCP treated fruits. 1-MCP treatment did not decrease the level of ethylene evolution regardless of $GA_{4+7}$ concentration during shelf-life in early-season Asian pear 'Hanareum'. By contrast, 1-MCP treatment decreased the respiration rate significantly during shelf-life. The efficacy of 1-MCP was greatest in the GA-untreated fruit and was reduced as the $GA_{4+7}$ concentration increased. 1-MCP treatment influenced the severity of physiological disorders including core browning and mealiness: 1-MCP treatment completely blocked the incidence of core browning of during 15 days shelf-life, and reduced the severity of mealiness during 20 days shelf-life regardless of $GA_{4+7}$ concentration. Based on our results, we conclude that the use of $1{\mu}L{\cdot}L^{-1}$ 1-MCP can be of great benefit for maintaining quality and preventing physiological disorders in early-season pear cultivar 'Hanareum' pear, whereas its efficacy decreases with the concentration of $GA_{4+7}$ whereas its efficacy gradually decreases when the concentration of $GA_{4+7}$ paste increased.

Changes in the Fruit Quality of Organic and Low-level Agrochemical-grown Kiwifruit during Storage (유기농 및 저농약 재배한 참다래의 저장 중 품질변화)

  • Park, Yong-Seo;Lim, Dong-Guen;Heo, Buk-Gu
    • Food Science and Preservation
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    • v.16 no.3
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    • pp.327-332
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    • 2009
  • Kiwifruits conventionally grown (CG), grown with low levels of chemicals (LCG), and organically grown (OG), were kept in cold storage for 24 weeks. Firmness gradually decreased with increasing storage time, regardless of cultivation mode, and the rate of softening was slightly higher in OG than in CG or LCG fruit. Neither dry matter level nor sensory values differed with varying types of cultivation. Soluble solid content increased with storage time, whereas acidity decreased in all fruit. Reducing sugar content increased notably until 12 weeks of storage, whereas starch content significantly decreased. The rate of OG fruit decay abruptly increased mid-storage and reached 35% 24 weeks after storage. Most fruit decayed due to infection with Botritis cinerea, regardless of cultivation type. Respiration and ethylene content peaked at mid-storage and were both slightly higher in OG fruit than in CG or LCG fruit. The shelf life of kiwifruit was reduced in OG fruit by increased fruit decay and softening during storage.

Effect of 1-methylcyclopropene and ethylene-absorbent treatments on quality changes of Prunus mume fruit during storage (1-MCP 처리 및 에틸렌 흡착제가 '백가하' 매실 저장에 미치는 영향)

  • Kim, Dae-Hyun;Bae, Jung Mi;Park, Jin Ju;Choi, Jeong Hee;Ku, Kyung Hyung;Lim, Jeong-Ho
    • Food Science and Preservation
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    • v.23 no.4
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    • pp.479-487
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    • 2016
  • This study was conducted to investigate the effect of 1-methylcyclopropene (1-MCP) and ethylene-absorbent on the qualities of Prunus mume fruit. Prunus mume fruits were stored without film packaging (Cont), packed in LDPE film (Cont-P), and packed with ethylene-absorbent (Cont-PE). Fruits were treated with 1-MCP (1 ppm) for 24 hr at $1^{\circ}C$. After treatment, fruits were packed in LDPE film (MCP-P) and with ethylene-absorbent (MCP-PE) and then stored at $1^{\circ}C$ for 8 weeks. Total soluble solids increased during storage but decreased after 6 weeks while total acidity decreased during storage. Cont was almost completely decayed after 8 weeks of storage while Cont-P, Cont-PE, MCP-PE, and MCP-P were 46, 69, 83, and 5% decayed, respectively. L value decreased but a value increased during storage in all samples. Firmness of peel and flesh of samples decreased gradually for 8 weeks. Respiration rate did not show any significant difference among samples. Ethylene production of Cont showed $0.05{\mu}L/kg/h$ but immediately after 1-MCP treatment, it showed $0.02{\mu}L/kg/h$. Oxalic and malic acids decreased while citric acid increased during storage; fructose and glucose substantially decreased after 8 weeks whereas sorbitol and sucrose increased upto 4 weeks and then decreased thereafter. Based on these results, packing the fruits treated with 1-MCP could extend the freshness of Prunus mume fruit.

Quality Maintenance and Suppression of Chilling Injury of 'Akihime' Plum Fruits Stored under Controlled Atmosphere (CA 저장을 이용한 자두 '추희'의 품질유지 및 저온장해 발생 억제)

  • Lee, Eun Jin;Choi, Sunyoung;Cho, MiAe;Hong, YoonPyo;Choi, JiWeon;Chung, DaeSung
    • Horticultural Science & Technology
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    • v.31 no.6
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    • pp.732-739
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    • 2013
  • 'Akihime' plums picked at mature stage (50-70% red coloration of the fruit skin) were stored at $1^{\circ}C$ under air or controlled atmosphere (CA) storage regime as following 3% $O_2$ + 1, 3, 5, and 7% $CO_2$ for 50 days for the purpose of assessing the effect of CA storage on the maintenance of fruit quality and the reduction of chilling injury. Fruits stored under CA storage regime showed reduced respiration as well as ethylene production rates compared to the fruits stored in air. Quality attributes including weight loss, Hunter 'a' values, soluble solids content, titratable acidity, and firmness showed smallest changes in fruits stored under CA conditions except for 3% $O_2$ + 7% $CO_2$. High incidence of physiological disorders including chilling injury, flesh browning, and decay were found in fruits stored under both air and CA of 3% $O_2$ + 7% $CO_2$. In our study, the CA storage regime of 3% $O_2$ + 5% $CO_2$ was found the most effective for maintaining overall fruit qualities of 'Akihime' plums produced in Korea, also delayed the development of chilling injury including lack of juiciness and flesh browning. From the results, storage at 3% $O_2$ + 5% $CO_2$ was selected as an optimal condition of 'Akihime' plum for extending storage life up to 50 days at $1^{\circ}C$.

Effects of 1-Methylcyclopropene and Benzyladenine on Flowering and Vase Life in Cut Iris (아이리스 개화율 및 절화수명에 미치는 1-methylcyclopropene과 benzyladenine의 영향)

  • Nam, Jin Soo;Park, In Sook;Shim, Sung Im;Ryu, Jung A;Lim, Ki Byung
    • FLOWER RESEARCH JOURNAL
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    • v.18 no.2
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    • pp.87-92
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    • 2010
  • This research was aimed to extend the vase life, improve the cut flower quality and promote flowering rate of bulbous cut Iris 'Blue Magic'. Three different concentrations of 1-MCP ranging from 250 to $750nL{\cdot}L^{-1}$ were treated on cut Iris flowers for the vase life elongation. Several effects of 1-MCP treatment has shown such as early flowering as one day but vase life showed no significant differences comparing to the untreated control. Flowering rate was 75% or more in the treated ones as compare to 64.2% in untreated control. Especially, in a treatment with $250nL{\cdot}L^{-1}$ 1-MCP for 12 hours it showed all flowering. In many post-harvest experiments of cut flowers, ethylene production from flower organ has considered as most critical factor on vase life. Ethylene production from flower organ was measured by gas chromatography (GC) and it showed that there is no direct relation between flower longevity and emission of the ethylene gas in cut Iris. In comparison with the untreated control, ethylene generation rather seems to be increased as 1-MCP treatment increased. There was a synergy effect when 1-MCP and BA applied simultaneously in which flowering and vase life were fastened and also extended, respectively. Therefore, treatment of 1-MCP for cut Iris at flower early harvest is able to improve the flower quality both by diminishing non-flowering rate and by extended flower longevity.

Thermodynamic Equilibrium and Efficiency of Ethylene Glycol Steam Reforming for Hydrogen Production (에틸렌글리콜의 수증기 개질반응을 이용한 수소제조에 대한 열역학적 평형 및 효율 분석)

  • Kim, Kyoung-Suk;Park, Chan-Hyun;Jun, Jin-Woo;Cho, Sung-Yul;Lee, Yong-Kul
    • Korean Chemical Engineering Research
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    • v.47 no.2
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    • pp.243-247
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    • 2009
  • This study is purposed to analyze thermodynamic properties on the hydrogen production by ethylene glycol steam reforming. Various reaction conditions of temperatures(300~1,600 K), feed compositions(steam/carbon= 0.5~4.5), and pressures(1~30 atm) were applied to investigate the effects of the reaction conditions on the thermodynamic properties of dimethyl ether steam reforming. An endothermic steam reforming competed with an exothermic water gas shift reaction and an exothermic methanation within the applied reaction condition. Hydrogen production was initiated at the temperature of 400 K and the production rate was promoted at temperatures exceeding 500 K. An increase of steam to carbon ratio(S/C) in feed mixture over 1.0 resulted in the increase of the water gas shift reaction, which lowered the formation of carbon monoxide. The maximum hydrogen yield with minimizing loss of thermodynamic conversion efficiency was achieved at the reaction conditions of a temperature of 900 K and a steam to carbon ratio of 3.0.

Fruit Quality Characteristics of 'Fuji' Apple Fruits in Response to Air Storage after CA Storage (Controlled Atmosphere (CA) 환경설정 해제 후 저온저장이 '후지' 과실의 품질에 미치는 영향)

  • Kweon, Hun-Joong;Choi, Dong Geun;Lee, Jinwook;Kang, In-Kyu
    • Horticultural Science & Technology
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    • v.32 no.2
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    • pp.178-183
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    • 2014
  • This study aimed to evaluate the fruit quality characteristics and incidence of flesh browning in response to air storage at $0{\pm}1^{\circ}C$ a fter controlled atmosphere s torage (CA condition: $O_2$ $2.5{\pm}0.5$%, $CO_2$ $1.5{\pm}0.5$%) at $0{\pm}1^{\circ}C$ in 'Fuji' apples (Malus domestica Borkh.). The storage system was performed as followed: air storage for one month, CA storage 4 months + air storage 3 months ( CA 4M + A ir 3M), CA storage 5 m onths + air storage 2 months ( CA 5M + Air 2M) a nd C A storage 6 m onths + air storage 1months (CA 6M + Air 1M), while the control fruits were stored at CA storage for 8 months right after harvest. The incidence of flesh browning ranged from 17.1% to 30.2% during CA storage but not detected under the treatments of CA 4M + Air 3M and CA 5M + Air 2M. The respiration rate was not affected by storage treatments for 6M while the respiration rate was lower in the treatments of CA 4M + Air 3M and CA 5M + Air 2M than the other storage treatments after 7 months. Ethylene production and internal ethylene concentration were lowest in rapid CA storage and increased with a decreasing CA storage duration. Therefore, the results indicate that CA 5M + Air 2M storage treatment should be recommended to maintain the fruit quality and reduce the risk development of flesh browning rather than typical CA storage in 'Fuji' apples.

Market Quality Changes of 'Fuji' Apples Influenced by the Duration of Preshipment Storage and Packaging during Simulated Export (수출 전 저장기간과 모의 수출에 따른 '후지' 사과의 상품성 변화)

  • Piao, Yi-Long;Lee, Jae-Chang;Hwang, Yong-Soo
    • Korean Journal of Agricultural Science
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    • v.29 no.1
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    • pp.15-23
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    • 2002
  • The percentage of watercore occurrence harvested on Nov. 6 (commercial harvest season) was over 80% but fruits seemed not to reach climacteric stage on the basis of ethylene evolution. The occurrence ratio and severity of watercore gradually decreased with the increase of preshipment storage for 2 months. The level of soluble solids did not show a clear tendency during preshipment storage but flesh firmness, fresh weight, and acidity gradually decreased. Although the overall quality of fruit reduced along with the increase of preshipment storage duration after exposure to retail condition at ambient temperature for 1 week, plastic film wrapping (PE 30 um) as well as plastic film wrapping plus ethylene scrubbing had a benefit on keeping freshness of fruit even after retail condition. Waxed fruit showed excellent appearance but browning disorder was developed. Results indicated that moisture barrier such as plastic film wrapping and ethylene removal have a great potential on keeping freshness of fruit during export which required long-term transport under low humidity environment.

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Effect of Cultural Regions or Methods on Postharvest Physiological Characteristics and Qualities of Paprika Fruits (재배지역과 재배방법이 파프리카 과실의 수확 후 생리 및 품질에 미치는 영향)

  • Kang, Ho-Min;Choi, In-Lee;Kim, Il-Seop
    • Journal of Bio-Environment Control
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    • v.17 no.4
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    • pp.325-329
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    • 2008
  • This study was conducted to compare the postharvest physiological characteristics of 2 paprika cultivars; 'Special', 'Fiesta' grown in 2 regions: Chuncheon(plain region) and Hwacheon(semi-high land region), and by 2 cultural methods; soil and hydroponic(rock wool culture). Respiratory rate of paprika fruit was higher in soil culture, and ethylene production was higher in Chuncheon region of both cultivars. As the thickness of fruit flesh showed thicker in Hwacheon region and hydroponic culture, the firmness of fruit was in proportion to thickness. Vitamin C content was higher in red-cultivar, 'Special'. and in Chuncheon region. Soluble solids was higher in 'Special', but there was no different between cultural regions. The fruit of both cultivars was grown smaller in Chuncheon region, and the fruit shape of 'Fiesta' progressed faster in soil culture. The surface color of fruit was higher in Hwacheon, and although there was no significantly different between cultural method, both cultivars grown by hydroponics was shown vivid color. As above results, for the long term circulation and high quality of fruit, paprika may be cultivated by hydroponics in high-altitude region.