• Journal of Chest Surgery
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• v.29 no.9
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• pp.1040-1044
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• 1996

A case with a bronchial foreign body(wood) which had an uncommon way of entry through a wound In the chest wall was described. A 41-year-old man was admitted to our hospital because of chronic cough and profuse purulent sputum. He had been injured by a fragment of wood which penetrated his anterolateral chest wall at 30 years ago. A chest x-ray film reavealed a calcific foreign body, measuring 3.0 by 1.0 cm, in the posterobasal segment of the left lung. Computed nomograp y of the chest demonstrated a calcific foreign body with bronchiectatic change near the diaphragmatic pleura In the left lower lobe. Left lower lobectomy was performed, and the patient remains well without any thoracic symptoms after the operation.

• Korean journal of applied entomology
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• v.32 no.1
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• pp.101-104
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• 1993

The life history and host plants of Locastra muscosalis (Walker) which is a defoliating pest of walnut trees were studied mainly in Chungchongbuk-do province. Juglans nigra Linne, J. mandshurica Mixim., Carya illinoensis koch and Pterocarya stenoptera DC. were found to be new host plants. Locasta muscosalis (Walker) had one generation per year and the adults emerged form late June to late July with a peak emergence around July 10th. Females oviposited a mean of 560 eggs on the top surfaces of leaves. The duration of the egg stage was from 7 to 12 days. Young larvae fed on the leaves within webs that bound the leaves beginning in the middle of July. In the middle of September the fully matured larvae entered the soil -a cm below the soil surface, and the pupal period lasted 16 days on average. The natural enemies observed and/or reared from larvae of pupae were 3 species of parasitoids, 6 species of predators and an unidentified virus.

• Research in Plant Disease
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• v.15 no.2
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• pp.77-82
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• 2009

The roots of grapevine in the field in which the crown gall was occurred severely in Chungbuk province were collected and Agrobacterium spp. were isolated from the roots using the selective media. The selected 13 isolates were identified as A. tumefaciens with fatty acid analysis using MIDI system, nucleotide sequence of 16S rDNA, biochemical characteristics, and PCR with the species-specific primers. A. vitis, a pathogen of crown gall disease of grapevine was not isolated from the roots. All of the isolates did not show pathogenicity on the tomato seedlings and the stem and root of grapevine. Eric-PCR showed that DNA band patterns of the root isolates were a little more similar to A. tumefaciens than A. vitis. However, overall similarity between the root isolates and the pathogenic strains of A. tumefaciens and A. vitis was low by rep-PCR. These results suggest that a pathogen causing crown gall in grapevine in Chungbuk province may transmitted through the seedlings rather than via soil or roots.

• 건강소식
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• v.31 no.3 s.340
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• pp.6-13
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• 2007

피부는 신체를 둘러싸고 있는 하나의 막이다. 이것은 우리의 생명 보존에 절대 불가결한 것이며 그 사람이 살아온 과정과 연륜을 말해주는 것으로 나무의 나이테와 같은 것이라고 할 수 있다. 피부의 총 면적은 개인에 따라 약간씩 차이는 있지만 평균 1.5~2.0㎡ 정도이고 피부의 두께는 평균 2mm이며 피하조직을 제외한 두께는 약 1.4mm정도이다. 신체 부위 중 가장 얇은 곳은 눈꺼풀이며 가장 두터운 곳은 손, 발바닥이다. 인체의 신비를 보여주는 우리 몸의 기관 그 세 번째 피부에 대해서 한림대학교 성심병원 피부과 김철우 교수, 리더스 피부과(강남 압구정점) 박병순 전문의의 도움말로 알아본다.

• Journal of the Korean Society of Food Science and Nutrition
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• v.33 no.3
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• pp.463-468
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• 2004

This study was conducted to determine the antimicrobial effect of leaf, bark and xylem of 6 kinds of Quercus spp. against food borne disease bacteria. All of the samples tested showed the antimicrobial effect against food borne disease bacteria. Bacillus cereus, Listeria monocytogenes, and Staphylococcus aureus was more sensitive than gram negative bacteria such as Salmonella typhimurium and Escerichia coli O157:H7, but no antimicrobial activity was observed against yeast and molds. Based on antimicrobial activity for kinds of Quercus spp., the antimicrobial activities of Quercus aliena Blume, Quercus mongolica Fisch, and Quercus dentata Thunb were stronger than those of Quercus variebilis Blume, Quercus serrata Thunb, and Quercus acutissima Carruth. In the meantime, the ethanol extract of Quercus spp. leaves showed the strongest antimicrobial activity compared to that of bark and xylem. Especially, the ethanol extract of Quercus aliena Blume leaf showed the strongest antimicrobial effect against foodborne disease bacteria among 6 kinds of Quercus spp.

• Food Science and Preservation
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• v.13 no.5
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• pp.629-633
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• 2006

Pinus rigida Miller leaf extract (PRLE) showed antimicrobial activity remarkably against food pathogenic and spoilage bacteria at concentrations of $100{\sim}250{\mu}g/mL$. Alcohol-soluble PRLE had higher antimicrobial activity against Staphylococcus aureus and E-coli than any other-soluble PRLE such as butanol, ethyl acetate, ether and water. As PRLE concentration increased alcohol-soluble PRLE increased the remarkable inhibitory zone of microbial growth on the microbial media. PRLE showed good stability against temperature and pH in the range of $40{\sim}150^{\circ}C$ and $4{\sim}11$, respectively. This may indicate that PRLE can be a potential anti-microbial agent for industrial application. In addition, SEM of Listeria monocytogenes suggested that it antimicrobial component would perturb the functions of microbial cell membranes synergistically. In the feeding experiment the formaldehyde content in the serum of formalin-fed and PRLE-treated me decreased remarkably due to the lysis of formaldehyde and the rate of hemoglobin biosynthesis was recovered to the orignal state within a short breeding time.

• Journal of Ecology and Environment
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• v.29 no.6
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• pp.585-591
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• 2006

We measured the litterfall quantity and investigated the nutrient dynamics in decomposing litter for three years at the LTER sites installed in a deciduous broadleaf natural forest in Mt. Gyebangsan, South Korea. Litterfall production was significantly different among the sampling dates, whereas it was not significantly different among the years. The total annual mean litterfall production for three years was 6,593 kg $ha^{-1}$ $yr^{-1}$ and leaf litter accounted for 82.6% of the litterfall. The leaf litter quantity was highest in Quercus mongolia, followed by leaf of other species, Betula schmidtii, Kaplopanax pictus, Acer pseudo-sieboldianum, etc., which are dominant tree species in the site. The mass loss from the decomposition of leaf litter was fastest in Cortinus controversa (100%), followed by A. preudo-sieboldianum, K. pictus, and B. schmidtii. 100% of litter for C. controversa, 96.1% for A. pseudo-sieboldianum, 92.8% for K. pictus decomposed, while 66.2% of litter for Q. mongolia decayed for 1,003 days. The lower rate of the mass loss in the litter of Q. mongolia may be attributed to the difference in substrate quality, such as lower nutrient concentrations compared with those of other tree species. The concentrations of N, P, and Ca for five litter types increased over time, while the concentrations of K and Mg decreased over time. Compared with the nutrients in the litter of Q. mongolia, the nutrients (N, P, K, Ca, Mg) in the litter of other species, C. controversa, A. pseudo-sieboldianum, and K. pictus, were released more rapidly. The results showed that the mass loss and the nutrient dynamics in the litter are variable depending on the tree species even in the same site conditions.

• Journal of the Korean Institute of Landscape Architecture
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• v.41 no.1
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• pp.44-50
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• 2013

The persons in charge of management request diagnosis and prescription to tree hospitals in order to get consultation about the problems like blight that occur in landscape tree management. This study aims to analyze what the main problems and questions raised by landscape gardeners are and those concerned in landscape tree management. This is done by investigating landscape tree-related questions and answers uploaded on the online consultation boards of the plant diagnostic centers approved in Korea including the Seoul National University Plant Clinic, the Chungbuk National University Plant Hospital, and the Kangwon Diagnostic Center. As a result, those concerned in landscape occupied the most as 81.4% among the questioners. However, only 11.5% did explain the plant management history or surrounding environment, which is essential for landscape tree diagnosis when asking questions. This shows that those concerned in landscape lack basic knowledge or interest about plant diagnosis. Among 263 questions about landscape trees, questions about physiological damage included 94 cases that were the most taking up 35.8%. Moreover, the next were damage by insects and damage by disease in order. It is thought that due to the characteristics of physiological problems that occur by various sorts of stress and with no signs, they tend to request diagnosis or prescription the most. The most frequent reasons for physiological damage are water stress and temperature stress. About damage by disease, there exist many types of diseases, and there are many complex damages accompanied by physiological causes. About damage by insects, the most common include damage by moths. In consideration of this result, universities or technician training centers should provide education for landscape tree management so that landscape technicians and students can acquire essential knowledge and information about landscape tree management and increase their interest in it. In particular, it is necessary to provide profound learning opportunities for plant physiology, and the technicians should make efforts themselves. In addition, it is needed to build organizations to which they can ask technical questions about landscape planting and management in order to understand landscape industry in general and the actual status of landscape planting technique and the actual field. Moreover, to elevate systemicity and expertise in the area of landscape tree management not yet equipped with the foundation, it is needed to cultivate the technicians intensively and conduct research by those concerned both in academic and industrial circles.

• Journal of Korean Society of Forest Science
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• v.78 no.2
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• pp.103-118
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• 1989

The occurrence of witches' broom in Ligustrum ovalifolium was first noticed in Korea by author in 1984. The present study was carried out with particular emphasis on the symptomatology, etiology, transmission of the disease and antibiotic treatments. The infected tissue was observed by the fluorescence and electron microscopy and its biochemical characteristics were compared with healthy one by electrophoresis. The results are summarized as follows : 1. symptoms of the infected trees were characterized by the dwarfing of the organs, yellowing and brooming of the foliage. 2. The observation by the trans electron microscopy on the witches' broom of L. ovalifolium revealed the occurrence of numerous mycoplasma-like organisms(MLOs) in the phloem tissue cells of the midribs of infected leaves. 3. The MLOs were surrounded by a single unit membrane, and they appeared to be multiplied by binary fission. 4. The presence of crystals unidentified in the phloem parenchyma cells was noticed by electron rnicroscopy, 5. The disease was able to be transmitted by budding, crown, and greenwood graftings to L. ovalifolium, L. obtusifolium, L, japonicum and also transmitted, even when the stocks and scions were not completely grafted. 6. Insect transmission on L. ovalifolium and L, obtzrsifolium was carried by Hishimonus sellatus. 7. The infected roots dipped in the 1,000 ppm of teracyclin solution was only temporarily effective in controlling the disease. 8. Infected plant with MLOs showed specific fluorescent reactions in phloems with DAPI stain. 9. The protein and peroxidase separated by electrophoresis showed strikingly distinctive difference between the healthy and diseased leaves.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.822-825
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• 2017

본 연구는 키넥트를 통해 사람의 걸음걸이를 측정하고 의사결정트리(Decision Tree)를 통해 분석함으로써 현재의 걸음걸이를 통해 측정자의 허리 또는 무릎에서 발생할 가능성이 높은 문제 또는 질병들을 예측하고 해당결과를 측정자에게 알린다. 본 연구를 진행하며 첫 번째 단계에서는 관련 논문이나 병원 자료 결과들을 통해 판별할 속성들을 정하였다. 두 번째 단계에서는 키넥트를 통해 측정한 실제 데이터를 적용하기에 앞서 첫 번째 단계에서 정한 속성들이 측정자의 문제 또는 질병들을 판단해내는 연관 정도가 높은지 테스트 데이터를 이용하였고 의사결정나무를 통해 분석하였다. 그 결과 7개의 속성 중 6개로 약 85.7%정도의 연관이 있었다. 마지막 세 번째 단계에서는 판별식을 세우고 실제 데이터들을 쌓아나가며 69명의 측정한 데이터를 분석한 결과 6개의 속성 중 5개의 속성이 허리와 연관정도가 높았고 이는 두 번째 단계에서 나왔던 결과인 약85.7%에 가까운 약83%의 결과가 도출되었다. 이를 기반으로 시스템을 개발해 나가며 판별 정확도를 향상시키기 위해 계속 측정해 데이터를 쌓아가고 관련된 식들의 문제점을 보완하며 또한 어떤 환경에서 키넥트의 측정값의 정확도가 올라가는지 연구할 예정이다.