• Journal of the Korean Society of Food Science and Nutrition
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• v.42 no.10
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• pp.1690-1700
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• 2013

The objective of this study is to develop and validate predictive growth models for Bacillus cereus (diarrhea type) vegetative cells, spores and Staphylococcus aureus in preprocessed Namul (bracken and Chwinamul) and root vegetables (bellflower and burdock). For validation of model performance, growth data for S. aureus in preprocessed vegetables were collected at independent temperatures (18 and $30^{\circ}C$) not used in the model development. In addition, model performance of B. cereus (diarrhea type) in preprocessed vegetables was validated with an emetic type of B. cereus strain. In primary models, the specific growth rate (SGR) of the B. cereus spores was faster than that of the B. cereus vegetative cells, regardless of the kinds of vegetables at 24 and $35^{\circ}C$, while lag time (LT) of the B. cereus spores was longer than that of the B. cereus vegetative cells, except for burdock. The growth of B. cereus and S. aureus was not observed in bracken at temperatures lower than 13 and $8^{\circ}C$, respectively. The LT models for B. cereus (diarrhea type) in this study were suitable in predicting the growth of B. cereus (emetic type) on burdock and Chwinamul. On the other hand, SGR models for B. cereus (diarrhea type) were suitable for predicting the growth of B. cereus (emetic type) on all preprocessed vegetables. The developed models can be used to predict the risk of B. cereus and S. aureus in preprocessed Namul and root vegetables at the retail markets.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2000.02a
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• pp.416-421
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• 2000

• Korean journal of applied entomology
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• v.19 no.3 s.44
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• pp.153-155
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• 1980

In pot experiment, relations between bulb nemationde, Ditylenchus dipsaci, and growth and yield of garlic were followed. There was no effect of height growth on bulb nematode, but growth of volume was reduced at more than 250 nematodes per pot. Yield loss of garlic was more than $20\%$ when nematode density was about 30 per bulb in late-April. Tolerance limit should be about 20 nematodes per bulb at early growing stage. Reproduction of bulb nematode was good when initial population had been low.

• 정보화사회
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• s.108
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• pp.34-37
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• 1996

전문가들과 업계관계자들이 참여하게 된것은 IC카드산업이 미래정보화사회에서 차지할 비중이 상당히 클것으로 예상되며 IC산업볼륨자체가 인터넷과 기업 및 각 개개인의 컴퓨팅환경의 네트워크화에 힘입어 상당히 커질 것으로 전망되기 때문으로 풀이된다.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2000.10a
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• pp.104-107
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• 2000

• Asian Journal of Turfgrass Science
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• v.17 no.2_3
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• pp.81-85
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• 2003

The plant parasitic nematodes were surveyed from Zoysia matrella, Agrotis palustris, and Poa pratensis at Anyang Benest Golf Club, Dongrae Benest Golf Club, and Gapyeong Benest Golf Club and from A. palustris at Castle Pine Golf Club. Criconema sp., Ditylenchus sp., Helicotylenchus sp., Meloidogyine sp., Pratylenchus sp., Tylenchus sp., and Tylenchorhynechus sp. were separated from unhealthy turf areas. In addition, Tylenchorhynechus dubius was firstly recorded from A. palustris at the green of Castle Pine Golf Club. Meloidogyne sp., Helicotylenchus sp., Ditylenchus sp., and Pratylenohus were separated from Z. matrella, Meloidogyne sp. and Pratylenchus were from A. palustris, and Meloidogyne sp., Tylenchus sp., Tylenchorhynchus sp., Criconema sp., and Helicotylenchus sp. were from P. pratensis. Out of separated nematodes, Meloidogyne was the most serious nematode and widely distributed.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2010.10a
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• pp.23-23
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• 2010

전북 서해안 새만금 지역에 조성되는 간척지 면적 28,300ha의 30%인 8,400ha 정도가 농업용지로 사용되는 계획이 확정됨에 따라 해당 용지를 효율적으로 사용 할 수 있는 다양한 활용 방안이 요구되고 있다. 대단위 농업지구가 들어설 예정지인 새만금 광활 간척지는 네덜란드와 유사하게 토양의 대부분이 미사질 양토로 이루어져있어 적용 가능한 화훼류를 적절히 선발하고 적합한 재배기술을 도입한다면 대규모 화훼제배 단지로서의 성장 가능성이 충분할 것으로 판단된다. 따라서 전북 농업기술원에서는 2004년부터 7년에 걸쳐 새만금 간척지의 농업적 활용도 제고와 경관농업 육성을 통한 관광자원화 가능성을 확인하기 위하여 72종의 원예작물 적응시험을 실시하였으며 22종의 자생식물과 튤립, 아이리스, 수선화, 히아신스, 참나리 등 5종의 구근 화훼류를 적합 화훼류로 선발하였다. '08~09년에는 내염성과 저온 및 풍해 저항성이 있는 아펠톤, 골든아펠톤, 네그리타, 프랑소와즈, 키스네리스 등을 간척지적용 가능 주요 튤립 품종으로 선발 하였는데 선발된 품종들을 대상으로 높은 염농도 하에서의 체내축적 무기성분을 조사한 결과, K와 Mg은 증가되는 경향이었으나 Ca은 감소되었으며, Cl이온은 현저하게 증가하였다. 또한 튤립체내의 산도 및 전기전도도와 항산화효소의 활성이 증가하였는데 스트레스 반응결과 유해산소가 체내에 축적되고, 이를 중화시키기 위하여 수소이온을 소모함으로써 체내의 산도는 상승된 것으로 추정되며 염분함량이 높을수록 삼투압에 의하여 뿌리에서 흡수는 양분이 적은 반면 잎 줄기의 증산작용은 동일하기 때문에 상대적으로 체내의 농도가 높아져 전기전도도가 상승된 것으로 판단된다. 식물 스트레스의 지표물질로 사용되고 있는 proline 함량도 토양내의 염도가 상승되면서 증가되었으며 엽록소 함량은 감소되는 경향을 보였다.

• Journal of the Korean Geotechnical Society
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• v.34 no.11
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• pp.43-55
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• 2018

AGF (Artificial Ground Freezing) method is a temporary ground improvement method which can apply to all types of soil with the purpose of high stiffness and low hydraulic conductivity. However, the groundwater flow and the heterogeneity of the ground increase the uncertainty of the ice-column formation which hinders the reliability of this method. The effects of groundwater flow and layered heterogeneity on ice-wall integrity by AGF method were analyzed using finite element analysis program for a coupled thermo-hydro phenomena in the freezing ground. Groundwater flow changes circular ice-column into elliptical shapes and increases the time required for the formation of ice walls. The previous theoretical formula overestimated the completion time of the ice wall and the critical groundwater velocity by neglecting the thermal interaction between adjacent ice-columns. Numerical results presented the corrected formula and verified the proposed equation for the dimensionless ice-wall completion time. In the layered heterogeneous ground, the thickness of the layer with higher hydraulic conductivity and its relative magnitude were found to be important factors in the ice-wall completion time and critical velocity.

• Journal of the Korean Geotechnical Society
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• v.36 no.12
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• pp.17-25
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• 2020

The artificial ground freezing method is a ground amelioration technology that does not have a permanent effect on the ground. One of the key factors that determine the efficiency and design criteria of the artificial ground freezing is the groundwater flow. Therefore, in order to accurately evaluate the behavior of the artificial ground freezing, studies on the effect of water flow on the formation of ice walls must be preceded. In this paper, experimental and numerical analyses were conducted using only pure water to maximize the effect of water flow on the formation of ice walls. A hydro-thermal coupled model for freezing behavior was proposed and the accuracy of the model was verified. Through the numerical and experimental studies, the flow rate dominates not only the formation time but also the shape of the ice wall. In addition, this study proposes a method to indirectly predict the ice wall formation time, which is expected to be highly useful for a practical application where it is difficult to visually identify ice walls.

• FLOWER RESEARCH JOURNAL
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• v.19 no.4
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• pp.264-268
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• 2011

'Duo', a late-flowering white gladiolus with pink core, was released by the National Institute of Horticultural & Herbal Science (NIHHS) in 2000. The selection was derived from the cross between the progenies of the early flowering dark pink 'True Love' and bright pink domestic cultivars 'Madame Valdiek'. The breeding was conducted in 1996 and selected finally in 2000 after four years (1997 to 2000) of experimentation. 'Duo' is a cut flower with bright white color petals and Pink core which exhibited late flowering and vigor without stem bending. It can be cultivated in areas or regions with strong winds during summer. 'Duo' has a very firm growth form and sturdy branches which do not bend when planted in the open fields. Likewise, the plant showed high tolerance to flooding and resistance, hence, could grow vigorously in open areas. It is a fast- growing plant which exhibits high corm production rate. 'Duo' had a 12.2 cm wide flower and 150 cm plant height. During summer, the average number of days to flowering was recorded at 75 days of 'Duo'. Top dressing must be conducted once or twice during corm production to enhance corm quality and quantity.