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揷木用土 및 Peat plug利用이 만생종 왜철쭉의 揷木에 미치는 영향에 관한 硏究
沈慶久,河有美,朴永洙 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.2
This study was carried out to propagate Rhododendron Satsuki hybrid `Bemi-Kirishima' through soft-wood cuttings in the closed mist room in connection to different concentrations of IBA, cutting media, Peat plug. The results were as follows: For the time of cutting, there were noticeable differences in the cutting on June 21 and July 8. Out of cutting media tested, the media prepared by mixing 50% vermiculite and 50 perlite(v/v ) on the treatment of IBA 1000ppm gave 100% rooting and the longest root length. Rooting of plants in the Peat plug was 93.5% and they uniform root length. In addition, Peat plug provided more space for cutting than cutting basket. It was possible that we got good cuttings and therby mass propagation through Peat plug.
조영선,김세곤,문우기,유재인,정치경 가톨릭대학 산업의학 센타 산업의학연구소 1984 韓國의 産業醫學 Vol.23 No.3
Exercise index(EI) was measured on 933 pneumoconiosis patients (865 patients with small rounded opacities and 68 patients with large opacities) and 176 suspected pneumoconiosis patients from Korean anthracitic mines, in order to evaluate the ventilatory impairment of pulmonary function according to the chest radiographic findings of pneumoconiosis. Exercise index was obtained from the maximum breathing capacity (MBC) and the exercise ventilation volume(EV) which were measured by spirometer and two step-test. Classification of pneumoconiosis was based on the international classification of ILO U/C. The results were as follows: 1. The mean value of E1 was significantly increased in pneumoconiosis patients with large opacities(46.0%) than in patients with small rounded opacities(26.5%) and with suspected pneumoconiosis(25.0%). The number of jpatients in substandard EI was 97.1% in patients with large opacities but 49.4% in patients with small rounded opacities and 40.3% in patients with suspected pneumoconiosis. 2. The mean values of EI and the number of patients in substandard EI were markedly increased in pneumoconiosis patients with small rounded opacities and suspected over 50 years of age. However, the number of patients in substandard EI showed no association with age in pneumoconiosis patients with large opacitis. 3. In pneumoconiosis patients with small rounded opacities, the mean values of EI and the number of patients in substandard EI showed significant association with the profusion (category) but no significant association with the type of small rounded opacities. 4. In pneumoconiosis patients with large opacities, the mean values of EI and the number of patients in substandard EI showed no significant difference between patients complicated with and without pulmonary tuberculosis. 5. No significant association of EI and the number of patients in substandard EI with the size of large opacities was observed in pneumoconiosis patients with large opacities, however, the mean values of EI showed increasing tendenccy in category B and C compared to category A.
이경영,유영범,김태원,이경룡 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-
Gastrointestinal tumors(GIST) are rare group of neoplasias of the gastrointestinal track, which originate from or differentiate into interstitial cells of Cajal (ICC). GIST traditionally have been designated as smooth muscle tumor. However, with increasingly accurate analytic tools, immunohistochemistry and ultrastructure, most investigators were able to demonstrate that ICC, a complex cellular network postulated to act as pacemaker cells of the gastrointestinal track, which exhibit both myoid and neural features, could be a candidate for tumor histogenesis. Most ICC are only c-kit-positive, however a subset are positive for both c-kit and CD34. Most GISTs are asymptomatic and are thus usually discovered incidentally during routine check, at operation of other organs. When symptoms occur, GISTs usually present with gastrointestinal bleeding due to ulceration of the overlying gastric mucosa. Bleeding may be massive, leading to hematemesis and melena. Recently, we experienced a large sized(5×5×5 cm) GIST on the upper body of the stomach, which caused massive upper gastrointestinal bleeding in a 61-year-old man and was treated by local resection with adequate safety margin about 2 cm.
쓰가루 單一品種 果園을 위한 꽃사과 受粉樹 利用에 관한 硏究
沈慶久,河有美,金健澔,朴永洙 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1
Crabapples potentially useful as pollenizers in single-cultivar 'Tsugaru' orchard was evaluated for their flowering times and pollen germination(%). Their efficiency in the setting of fruits following controlled pollinations on 'Tsugaru' at private orchard in Sang ju was also examined. The obtained results are as follows, (1) Flowering times of Malus spp. 'Almey' and Malus spp. `Pioneer X' were from April 30 to May 1 and had the same flowering time of 'Tsugaru'. (2) Pollen germination(%) of crabapples using as pollenizers of 'Tsugaru' was over 90% of Malus spp. 'Almey' and Malus spp. 'Pioneer X' respectively. (3) Percentages of fruit setting in 'Tsugaru' crossed with Malus spp. 'Almey' and with 'Pioneer X' showed 99.3% respectively. (4) There was no statistically significant difference in the fruit skin color, fruit diameter (cm), fruit. height (cm), fruitt index, fruit weight(g), soluble solid(˚BX), acidity(pH), fruit hardness (kg/㎠), and seed numbers of 'Tsugaru' crossed with 'Pioneer X' and 'Almey'. (5) On the bases of flowering times, pollen germination, efficient fruit set, promising of fruit skin solour, and no statistically significant difference in fruit quality, Malus spp. 'Almey' and 'Pioneer X' are promising as pollenizers for single-cultivar 'Tsugaru' orchard.
미국 및 캐나다 地域에서 栽培, 販賣되고 있는 무궁화 品種에 關한 硏究
沈慶久,河有美,朴永洙,金健澔 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1
This sutdy was carried out to examine the present distribution and status of Hibiscus cultivars by analyzing the US and Canadian market. The obtained results are summerized as follow : 1. At present, a total of 28 cultivars of Hibiscus are on the market. Among these, twenty four are diploids and four are triploids. The hottest cultivars in the market is a triploid `Diana' sold by 21 different companies. It is followed by 'Ardens' and 'Jeanne d'Arc', following `Red Heart', `Blue Bird', 'Woodbridg e', and 'Helene'. 2. As a conservation or display purpose, several cultivars are ketp in three different arboretums in the US. These include 5 cultivars, `Blue Bird', `Celestial Blue', `Collie Mullens', 'Lucy', and `Ruber Plena', in Arnold Arboretum, and one each, 'Variegatus', at the USDA national arboretum and, `Banner' at Morton arboretum in Chicago. 3. The avarage price for triploid cultivars is $6.00 for each seedling. The recently developed cultivars like 'Helene' and 'Minerva' cost $16.00 per seedling possibly due to their plant patent right. Other cultivars produced by cuttings cost $2.00 to $ 3.00 per seedling. 4. In Canada, there are nine cultivars on the market; being diploids and one triploid, `Diana'. 5. As for the distribution of different cultivars by climatic zone, twelve cultivars are being grown in temperate area like Ohio and Iowa. However, many other cultivars are being cultivated in wamer Southern state like Galifornia. Five cultivars are reported to grow in the relatively cool area like Wisconsin and Minnesota. Even in cold area like Canada, 5 cultivars such as `Anemonaeflorus'(2n), `Ardens'(2n), 'Jeanne d'Arc'(2n), and `Luky'(2n), and 'Paeoniflorus'(2n) at Ontario and there is colder than Hamkyung Do in north Korea.
전산유체 기법을 이용한 DAF 부상조에서의 수리 특성 고찰
김성훈,유제선,김영미,박희경 대한상하수도학회 2002 상하수도학회지 Vol.16 No.4
Dissolved air flotation is a solid-liquid separation process that uses fine rising bubbles to remove particles in water. DAF is found most effective in treating algae and lower density flocs that are hard to remove in sedimentation process. Some researcher reports the results of an experimental study which examined the flow within the flotation zone of a DAF tank (ONeill at al., 1997). I would be concluded that, in general, the flow within flotation zone is robust and that differences in the performance of individual DAF tanks must be the result of processes occurring within the contact zones of these tank, not as the result of flotation processes. In this research, the authors thought that the efficiency of the DAF process is strongly related to bubble size. It means bubble rising velocity at the air injection nozzle is most important factor of DAF process. However, bubble movement in DAF tank is somewhat complicate, so it is hard to make up conceptual model through simple mass balance as other researchers did (Leppinen at. al., 2000). For the modeling of turbulent 2-phase flow in the tank, the standard k-ε model was used in CFD code because it is widely accepted and the coefficients for the model are well established. This model uses the eddy-viscosity hypothesis for the turbulence. As the result of this study, the authors concluded that bubble size and its rising velocity is very important factor of DAF process and the recycle ratio must be also consider for the flotation zone parameter. Also, For the improved model, relation between turbulent intensity and bubble-particle attachment must be studied.