• Korean Journal of Food Science and Technology
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• v.36 no.2
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• pp.239-245
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• 2004

Storage quality of minimally processed onion as influenced by hot-water dipping was investigated to examine feasibility of mild heat treatment as efficient post-processing method. fresh onions were peeled, trimmed, and dipped in hot water at various temperatures ($50-80^{\circ}C$) for 1 min. Heat-treated onions were cooled, de-watered, packaged in low density polyethylene (LDPE) film pouches ($63\;{\mu}m\;thickness$), and stored at $10^{\circ}C$. Samples treated at higher temperatures ($70-80^{\circ}C$) showed significant increases in flesh weight loss and discoloration during storage as compared to others. Hot-water dipping remarkably reduced initial microbial load of prepeeled onions, with over 1 log cycle decrease in aerobic bacterial count. After 7 days storage, no significant differences in viable aerobe count were observed among treated and untreated samples, with both showing $10^{6}-10^{7}\;CFU/g$. For sensory attributes including discoloration, wilting, decay, and visual quality, onions treated with hot-water dipping at $60^{\circ}C$ scored highest. Results suggested hot-water dipping at specific condition as practical post-processing treatment could effectively prolong shelf life of minimally processed onion.

• Korean Journal of Environmental Agriculture
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• v.33 no.4
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• pp.364-371
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• 2014

BACKGROUND: To evaluate the impact of rapid temperature change at spring and the early summer seasons in climate change, we have investigated the physiological response and yield of onion in a greenhouse with thermostat control system. METHODS AND RESULTS: Seedlings of onion(cv. Sunshine) were planted on October 30, 2012 and harvested on May 30, 2013. The used treatments(March-April-May) for a rapid temperature change were T0(control): $6.0-10.4-17.2^{\circ}C$, T1: $6.0-5.4(-5)-17.2^{\circ}C$, T2: $6.0-10.4-22.2(+5)^{\circ}C$ and T3: $6.0-5.4(-5)-22.2(+5)^{\circ}C$. Total yields of bulb within the temperature change as high temperature treatment T2 and control treatment T0 were increased significantly(p<0.05), as compared to the low temperature treatment T1. Low temperature conditions significantly (p<0.05) reduced plant height, SPAD reading, crude protein and fiber etc., as compared to the TO and T2. CONCLUSION: The rapid temperature changes were highly affected by low temperature than high temperature. These results suggest that rapid climate change of future could need systematic standard model for physiological characteristics and yields of onion.

• Korean Journal of Soil Science and Fertilizer
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• v.38 no.2
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• pp.78-84
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• 2005

This study was conducted to investigate the effects of chemical treatments and electric and magnetic field treatments on germination and seedling growth of onion (Allium cepa L.). Germination ratios of the onion seed were not much different among the tested species. However, germination ratio was much higher in species of small and medium size seed than that of large one. Moisture content of the seeds was shown to be more suitable in the range of 10-15% for seed germination compare to that of 20%. The germination ratio of onion seeds was found to be increased by the chemical treatments in the order of GA<$NaNO_3$<$KNO_3$. In particular, the treatments with 0.1 and 0.2% $KNO_3$ increased the germination ratio by 13 and 15% compared to that of the non-treatment. The seeds treated with electric or magnetic field resulted in much higher germination ratio and better initial growth. Germination ratios of 86 and 88% were found in the 10 kV and 4 Gauss treatments, respectively. The length and weight of the seedlings grown for 40 days after transplanting were increased by 23-45% with 8 kV and 12 Gauss treatments compared to those of non-treatment.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.19 no.5
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• pp.453-458
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• 1986

The present study was directed to investigate the antioxidative effects of onion and mustard powder extracts on fish oil. The oxidative changes of sardine oil with and without onion and mustard powder extract were estimated by measuring peroxide value (POV), thiobarbituric acid (TBA) value, weighing method, acid value (AV) and fatty acid composition, periodically. The results obtained are summarized as follows ; From view point of POV, fat soluble fraction of onion and mustard powder showed much inhibitory effect on the oxidation of sardine oil, marked induction period to be prolonged about 18 and 20 days, respectively. But the POV in fat soluble fraction of mustard powder increased remarkably in the early stage of storage, so it did not show inhibitory effect on the oxidation of sardine oil. In the TBA value of sardine oil during storage, the water soluble fraction of onion and mustard powder were more slowly increased than other fractions. The weighing change of sardine oil, contained in the water soluble fraction of mustard powder, was slower than other fractions, marking $0.5\%$ of weight gain during 30 day storage. On the other hand water and $80\%$ ethanol soluble fractions of onion were marked $2.3\%\;and\;5.8\%$ of weight gain during 30 day storage. In the oxidative degradation of docosahexaenoic acid, water soluble fractions of mustard powder and onion extracts showed the strongest inhiditory effect.

• Food Engineering Progress
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• v.13 no.4
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• pp.360-364
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• 2009

The onion extractions of MIX treatment (5% $\beta$ cyclodextrin+1% calcium chloride+1% soluble starch mixture solution) using hot water (100${^{\circ}C}$ and 80${^{\circ}C}$) and ultrasonic treatment (25${^{\circ}C}$) incresed L values and decreased a and b values apart from the extraction methods. Extent of the browning reaction as caused by the MIX treatment (0.093) following 100${^{\circ}C}$ water extraction resulted in as low as 31% O.D. level, as compared to the control(0.296). Analysis of the pyruvic acid showed that the control had higher content of pyruric acid than MIX-treated samples. The MIX treatment had lower intensities and higher preferences of browning color and pungency taste compared to the control. The total and coliform microbial counts increased continuously during storage period, while the MIX treatment reduced the number of viable cells. Finally, it was concluded that the MIX treatment was highly effective in suppressing the undesirable browning color and pungent taste after processing, and the microbes increment during storage.

• Journal of Veterinary Clinics
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• v.16 no.2
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• pp.289-292
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• 1999

마늘은 백합과 식물로서 인류의 식생활에서 중요한 역할을 할 뿐 아니라 최근에는 항암작용을 가진 것으로도 알려져 세계적으로 많은 연구가 수행되고 있다. 그러나 같은 백합과 식물인 양파의 경우 과량 섭취시 개에서 용혈성 빈혈이 유발된다는 것은 잘 알려진 사실이지만 마늘의 경우 이러한 부작용에 관한 보고는 전혀 없는 실정이다. 따라서 본 연구에서는 체중 25 kg 이상의 성견을 대상으로 마늘 추출액을 투여한 결과 다음과 같은 성적을 얻었다. 총적혈구수(RBC), 헤모글로빈(Hb)함량, 혈구용적(PCV), 평균적혈구용적(MCV), 평균적혈구혈색소농도(MCHC)는 실험기간 중 유의한(P＜0.05) 감소경향을 나타내었다. GSH 함량은 6일째 유의한(P<0.01)증가를 나타내었다. 본 실험 성적의 결과 과량의 마늘 투여시에도 양파에서와 동일한 용혈성 빈혈이 발생되는 것으로 생각된다.

• Food Science and Preservation
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• v.16 no.6
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• pp.929-937
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• 2009

We identified volatile organic compounds in Korean Allium species. Volatile organic components in three Korean Allium species, dried garlic, dried onion, and dried Welsh onion, were extracted using a simultaneous distillation and extraction (SDE) method and identified by GC/MS analysis. The numbers of volatile compounds were 48, 32, and 33 in the three species, respectively. In dried onion, the major compounds were dipropyl trisulfide, methyl propyl trisulfide, and propanethiol. (Z), (E)-propenyl propyl trisulfide, methyl propyl trisulfide, and dipropyl trisulfide were detected at high levels in Welsh onion. In dried garlic, presence of the allyl group identified characteristic volatile organosulfur compounds including diallyl disulfide and diallyl trisulfide. Qualitative and quantitative analysis of volatile compounds in three Korean Allium species showed that sulfur-containing compounds were dominant, and allyl groups derived from (+)-S-(2-propenyl)-L-cysteine sulfoxide (ALLYL CSO, alliin) were more abundant in dried garlic, than in other materials.

• Korean journal of applied entomology
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• v.37 no.2
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• pp.119-206
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• 1998

Nematicidal potential of some plant extracts were evaluated for the control efficacy of the northern root-knot nematode, Meloidogyne hapla on tomato (Lycopersicon esculentum) in pot. Tagetes patula, Zoysia japonica, Rhus sylvestris, R. chinensis, and Allium cepu were used. Leaf or root extracts were prepared at the rate of undiluted and diluted to 2, 4, 8, or 16 times with distilled water and treated simultaneously, ahead or later tomato planting. Pre-treatments of extracts were more effective than simultaneous or post-treatments, and the number of egg masses was different according to concentrations. M. hapla was less infected when the T. patula was planted at 15 days ahead tomato planting. Leaf or root extracts of T. patulu reduced damages of M. hapla significantly in all treatments. Leaf extract was more effective than root extract; the number of egg masses was 2.2 and 5.5 in 5-days pre-treatment of leaf or root extracts while 129.4 in control. In Z. japonica treatment, the number of egg masses was 87.2 in control, 21 in undiluted concentration of leaf extract and 28.4 in diluted concentration as 2 times. Leaf extracts of R. sylvestris, R. chinensis and A. cepa were also very effective against M. Izapla. The number of egg masses of M. hapla was 1.6, 1.6, and 6.2 in 5-days pre-treatments of R. sylvestris, R. chinensis and A. cepa, respectively while it was 193.6 in control. Less egg masses of M. hapla were detected in higher concentrations than in lower concentrations of all the plant extracts.

• Korean Journal of Agricultural and Forest Meteorology
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• v.20 no.4
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• pp.321-329
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• 2018

A study was carried out to determine the influence of climatic environments on the growth characteristics and bulb quality of extremely early-maturing type onion grown at different altitudes, such as 60m, 200m, 350m and 700m above sea level (ASL). The mean air temperature during the growing season of extremely early-maturing type onion (October 18 to April 27) was $10.8^{\circ}C$, $9.6^{\circ}C$, $8.1^{\circ}C$ and $6.1^{\circ}C$ at 60m, 200m, 350m and 700m ASL. The mean air temperature during the bulb growth period (March 16 to April 14) was recorded $10.5^{\circ}C$, $9.4^{\circ}C$, $7.9^{\circ}C$ and $6.0^{\circ}C$ at 60m, 200m, 350m and 700 m ASL. Plant height, neck diameter, leaf number, leaf area, top fresh weight and top dry weight were significantly increased in growing of extremely early-maturing type onion at 60m ASL. Bulb/neck diameter ratio increased rapidly under the same temperature regime. The diameter and weight of the bulb were also the largest at 60m ASL during the bulb growth period (daily mean temperature of $12.5^{\circ}C$). At 60m ASL, there was the highest bulb size like a height, diameter and weight of bulb related directly on onion yield in the bulb growth period from March 16 to April 14. In contrast, yield and bulb quality were considerably decreased at 700m ASL during the bulb growth stage (daily mean temperature of $8.4^{\circ}C$). The quantity of extremely early-maturing type onion has gradually decreased as the daily average temperature drops below $12.5^{\circ}C$ during the bulb growth stage (March 16 to April 14). As a result, the lower temperature (daily mean temperature below $12.5^{\circ}C$) during the bulb growth stage significantly decreased the size and quantity of bulb in direction proportion.

• Journal of Global Scholars of Marketing Science
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• v.2
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• pp.1-16
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• 1998

경남 및 전남지방은 산업에 있어서 농업의 비중이 상대적으로 큰 지역이다. 두 지방의 농업의 특성은 큰 차이는 없으나, 전남 지역이 농가인구, 호당 경지면적이 넓다. 영농 형태별로는 전남 지역이 수도, 전작의 비중이 크며, 경남지역은 과수, 채소, 화훼, 축산 등 소득작목의 비중이 높다. 농업기반에 대하여 보면, 농업진흥 지역비율은 경남 53.7%, 전남 64.8%이며 수리답율은 81.9% 76.1%, 경지정리율은 76.1%, 68.4%로 경남지역이 유리한 기반을 갖고 있다. 작목별 특화도를 보면 경남 지역은 맥류, 서류, 앙파, 마늘, 감, 화훼류 등이 높으며, 전남 지역은 맥류,두류, 마늘, 양파, 감, 참깨 등이 높게 나타나고 있다. 지역내 수급현황을 보면 경남지역은 미곡, 두류, 무, 배추, 고추, 사과, 포도, 복숭아 등이 부족하며, 서류, 마늘, 양파, 배 등이 과잉이고, 전남지역은 대부분이 과잉이며 사과, 포도, 복숭아 등이 부족하다. 지역간 농업협력은 상호 과부족인 농산물의 교역이나 비교우위가 있는 작목에 특화함으로써 서로 이익을 누리는 방안과 타 지역이나 해외 진출에 있어서 공동보조를 취하는 것으로 생각할 수 있다. 이에 대한 구체적 빙안으로서는 무엇보다 양 지역농업 및 농민에 대한 상호 이해가 이뤄져야 하며, 이를 전제로, 지역별 비교우위가 분명한 품목에 대하여 상호 우선적으로 구매할 수 있도록 하는 등 상호 교역을 지원하며, 농산물 수급 불균형으로 인한 가격파동을 예방하기 위하여 계획생산, 계획 유통이 불가피한 만큼 농협, 농민단체, 지방정부간의 농업정보의 공유와 조정 채널을 구축하고, 지역간 직거래 활성화하고 서로의 이해를 돕기 위한 농산물 장터 등 장소와 기회를 제공하며, 해외수출 시장 개척을 위한 공동 노력, 농업기술의 상호 교류 등이 필요하다.