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1-Methylcyclopropene을 이용한 ‘대석조생’ 자두의 유통기간 연장
오소영(Soh-Young Oh),임병선(Byung-Seon Lim),이재욱(Jae Wook Lee),도경란(Kyung Ran Do) 한국원예학회 2007 원예과학기술지 Vol.25 No.4
본 연구는 1-MCP가 ‘대석조생’ 자두의 자장 중 품질 변화와 유통기간 연장에 미치는 영향을 구명하기 위하여 수행하였다. 수확한 ‘대석조생’ 자두를 균일한 숙기와 크기로 선별하여 품온을 10℃로 낮춘 후 1-MCP를 1μLㆍℓ⁻¹ 농도로 10℃에서 24시간 동안 처리하였다, 1-MCP를 처리한 후 바로 20℃에서 모의 유통한 처리구와 0℃에 10일간 저장 후 20℃에 옮겨 모의 유통한 처리구 과실을 대조구 과실과 비교하여 상품성과 유통기간 연장 효과를 조사하였다. 에틸렌 생성과 호흡량은 상온유통 및 저온저장 후 상온유통 모두 1-MCP 처리에 의해 유의성 있게 감소하였다. 또한 1-MCP는 자두의 연화와 색도 변화도 억제하였다. 그러나 가용성 고형물 함량 변화에는 아무런 영향을 미치지 않았으며, 부패 억제 효과를 나타내었다. 모든 처리구에서 내부갈변은 발생하지 않아 1-MCP에 의한 영향은 관찰 할 수 없었다. 1-MCP는 자두의 유통기간 중 과피의 색깔 변화, 과육의 연화 방지, 그리고 산도 유지에 매우 효과적이었다. This study was conducted to investigate the effect of 1-MCP on the postharvest life of ‘Ooishiwase’ plum. Plums were treated with 1 μLㆍℓ⁻¹ 1-MCP at 10℃ for 24 h. Treated plums were divided in groups according to purpose before storage. Group Ⅰ was used to examine the effect of 1-MCP on plum ripening at 20℃. Group Ⅱ was used to examine the effect of 1-MCP on plum ripening at 20℃ and 0℃ storage. Our results found out that 1-MCP reduced production of ethylene, CO₂ and softening of plum fruits. The change in the rind color was delayed. Moreover, soluble solids content was not affected and decay caused by Botrytis cinerea and Penicillium expansum was reduced during storage. 1-MCP can be utilized as an effective means of maintaining quality and extending shelf life of plums.
오소영 ( Soh Young Oh ),남기웅 ( Ki Woong Nam ),윤덕훈 ( Deok Hoon Yoon ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.3
BACKGROUND: White stain symptom caused by Acremonium acutatum and Trichothecium roseum, is one of the most important diseases on the grape. This disease occurs national-wide in Korea and causes irreversible damage on grape, at harvest season. This study was conducted to develop environment-friendly control method against white stain symptom. METHODS AND RESULTS: Environment-friendly materials were tested for control activity against A. acutatum and T. roseum in vitro and in vivo. The effect of environment- friendly materials against white stain symptom on grape in farmer’s greenhouse was examined. The materials, NaDCC and sulphur, were sprayed three times on the leaves and fruit of grape at the two sites of farmer’s field, Anseong and Hwaseong of Gyeounggi. To evaluate control effect of NaDCC and sulphur against white stain symptom, the disease severity was investigated after the two materials were sprayed from the disease onset three times at the 7-day intervals. NaDCC showed efficacy of 59.71% for Kyoho and 72.26% for Campbell-Early, and sulphur showed 78.31% for Koyho and 66.19% for Campbell-Early. CONCLUSION: We were selected sulphur and Sodium- Dichloroisocyannurate(NaDCC) based on the results of experiments in vitro. In field test, sulphur and NaDCC showed suppressive effect in the white stain symptom of grape. These results suggested that NaDCC and sulphur selected can be used as control agents for controlling white stain symptom on grape.
쌈채소의 세척방법에 따른 잔류농약 및 미생물 제거 효과
오소영(Soh Young Oh),최선태(Sun Tay Choi),김지강(Ji Gang Kim),임채일(Chae Il Lim) 한국원예학회 2005 원예과학기술지 Vol.23 No.3
최근 소비 패턴에 부합하는 안전한 농산물 유통기술 개발의 일환으로 본 연구는 쌈채소에 대한 농약 및 미생물 안전성에 효과적인 세척방법을 확립하기 위해 수행되었다. 시험 재료로는 쌈채소 중 소비량이 많은 상추, 깻잎, 청경채 및 케일을 사용하였고, 세척방법은 수돗물, 염소, 초음파 및 오존수 세척을 이용하였으며, 세척효과 검정은 잔류농약, 미생물 및 품질변화 등을 조사하였다. 농약제거 효과에 있어서는 염소, 초음파, 오존수 세척이 일반 물 세척에 비해 농약 잔류허용기준치인 5ppm 이하로 검출되어 효과적이었으며, 세척에 따른 미생물 살균효과는 일반세균과 대장균군의 경우 일반 물세척은 그 개체수가 오히려 증가하거나 감소효과가 없는 반면, 염소, 초음파, 오존수를 이용할 경우 개체수를 현저히 감소시킬 수 있었으며 곰팡이 및 효모의 경우에는 초음파와 오존수 세척이 일반 물 및 염소세척보다 효과적이었다. 세척에 따른 품질손상 검정방법으로 세척 전ㆍ후 항산화활성 및 비타민 C 함량을 조사한 결과 전자공여능은 45~52%, 비타민 C 함량은 20.9±3.9~23.2±1.0㎎/100g으로 세척방법에 따른 차이를 볼 수 없었으며, 세척 후 유통 중 품질 변화 또한 차이를 보이지 않았다. 따라서 일반 물세척에 비해 염소, 초음파, 오존수 등을 이용할 경우 쌈채소 품질 변화없이 농약, 병원성 미생물을 효과적으로 제거할 수 있을 것으로 판단되었다. This study was conducted to develop washing methods which can remove pesticides and microorganisms in leafy vegetables. Lettuce, sesame leaf, pak choi, and leafy kale were washed with tap water, water chlorinated or ozonated, and ultrasonic treatment. Then, the leafy vegetables were placed in plastic trays and stored at 5℃. Pesticide and microorganism residues in the leafy vegetables between treatments were determined. The study revealed that pesticide residues were reduced below 5 ppm when leafy vegetables were washed by ultrasonic treatment, water contained with chlorine or ozone radical except tap water. Population levels of total aerobic mesophillic and total coliforms were also reduced by ultrasonic treatment, chlorine and ozone water, but increased or not affected by tap water washing. Antioxidative activity (DPPH) and vitamin C were investigated as indicators of quality change by washing treatments. Antioxidative activity (DPPH) of leafy vegetables were similar between control and each washing methods at 45~52%. Vitamin C was not affected by washing methods at 20.9±3.9~23.2±1.0 ㎎/100 g. The influence of treatments on DPPH and vitamin C during storage at 5℃ after washing were not significantly different. The results of the study further showed that ultrasonic treatment, chlorine, and ozone water washing were effective in eliminating pesticide and microbial contamination without affecting the quality of the vegetables.
오소영 ( Soh Young Oh ),남기웅 ( Ki Woong Nam ),윤덕훈 ( Deok Hoon Yoon ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.3
BACKGROUND: The white stain symptom of grapeclusters and canes by dust-like particles occurred in manyvineyards recently. This study was conducted to investigatethe ecological characteristics of white stain symptom ingrapevines and vineyards. METHODS AND RESULTS: Optimal climate conditionfor white stain symptom was 25℃∼30℃ with 60% ofhumidity. Moreover, closed condition with same humidityshowed higher incidence rate of white stain symptom thanventilation condition. Grape varieties with black berry skinsuch as Campbell-Early and Kyoho were more sensitive towhite stain symptom compare to varieties with green andred berry skin. Although the pathogens were not detecteduntil March, they increased from April, and increasedsharply from mid of July. The pathogens may overwinter inthe infected stems and/or on the bark as a mycelium. According to the increase of sugar content of grape fromAugust to September, the mycelium which was parasitic onthe bark grew to move to the fruits through the stems, andfinally reached the fruit stalk to detach berries from theclusters. CONCLUSION: Well ventilation is recommended insidethe vineyard since mid-July with roll up an insect net. Inaddition, infected stems and fruits should be removed outfrom grapevines infected with pathogens in the vineyards.
오소영 ( Soh Young Oh ),남기웅 ( Ki Woong Nam ),윤덕훈 ( Deok Hoon Yoon ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.3
BACKGROUND: The aim of this study is to investigate theeffects of Lycium chinense Miller fruit and itsrepresentative constituent betaine on reduction ofimmobility time and blood parameters in balb/c mice. METHODS AND RESULTS: We investigated theimmobility time and the changes in aspects of bloodbiochemical parameters by the administration of L. chinense Miller fruit and its representative constituentbetaine, after the forced swimming test. The immobilitytime was significantly reduced about 41.3% and 53.6%,respectively, in the animal of L. chinense Miller fruit and itsrepresentative constituent betaine-administrated group for7 days, in comparison with that of the control group. Thelevel of blood urea nitrogen was significantly decreased inL. chinense Miller fruit and its representative constituentbetaine-treated group compared with the control group (P <0.05), respectively. In addition, the interlukin-2 levels ofmice in L. chinense Miller fruit and betaine treated groupwas increased compared with the control group. CONCLUSION: These results indicate that L. chinenseMiller fruit and betaine might be helpful in the immunefunction improvement, enhance physical stamina, andfatigue recovery.