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최유성,이희철,주미 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.1
Odontogenic keratocyst is one of the jaw cysts which have high recurrence rate and aggressive behavior. The radiographic findings and clinical symptoms of this disease are similar with other jaw cyst. So the final diagnosis requires the histopathologic confirmation and the patiend should be examined periodically due to recurrence rate of this disease. This was the case of odontogenic keratocyst including a tooth which is in the left maxillary sinus. We thought it was a dentigerous cyst including a tooth preoperatively. The lesion was enucleated with yellow cheese-like material and histopathologic findings revealed abundant keratinizing debris, lining epithelium characterized by palisaded basal layer, orthokeratosis, and multifocal parakeratosis.
사람태아골모세포에 대한 GBM의 골형성 유도에 관한 효과
최호철,최희인,유형근 원광대학교 치의학연구소 2003 圓光齒醫學 Vol.12 No.2
The purpose of the present study was to investigate the effects of GBM on the activity, differentiation and alkaline phosphatase(ALP) synthesis of hFOB1s. To examine the cellular activity, hFOB1s were cultured with DMEM/F-12 1:1 Mixture and 100 ㎍, 2 mg, 5 mg, 10 mg of GBM for 2 days and 4 days. To compare the ALP synthesis, hFOB1s were cultured with DMEM/F-12 1:1 Mixture and 100 ㎍, 2 mg, 5 mg, 10 mg, 20 mg of GBM for 3days. The cellular activity of hFOB1s treated with 100 ㎍ of GBM was increased at 2 and 4-day(p>0.05) to control. The activity of ALP in hFOB1s treated with 100 ㎍ GBM was significantly increased at 3 day(p<0.05). This study indicated that 100 ㎍ of GBM has an inductive effect on bone formation in vitro increasing with cell proliferation, ALP activity.
宋哲圭,徐裕德,金蘭姬 영남이공대학 1999 論文集 Vol.28 No.-
The purpose of this research is to analyzed the facts of the freshman's actual lives of Yeungnam College of Science & Technology using the questionnaire. The questionnaire are consisted of 4 parts. The first part focused on the students' demographic factors. The second part focused on the life environment of the students'. The third part focused on the student's attitude about college. The forth part focused on the students' psychological traits and so on. The result of this research shows the traits and changes of the freshman lately. In addition it dim the basic materials to establish administration of college and to counsel and guide the freshman.
조용준,양희철,은희철,유재형,김준형 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.5
용융염산화는 혼성폐기물과 유해폐기물을 효과적으로 산화 및 분해할 수 있는 소각대체기술중 하나이다. 본 연구에서는 직경이 0.079 m이고 높이가 0.653 m인 용융염산화 반응기에서 기체체류량 및 기-액 흐름특성에 대한 연구를 수행하였다. 액상으로 용융탄산나트륨을 기상으로 건조된 공기를 사용하였으며 기체유속(0.05-0.22 m/s)과 용융염온도(870-970℃) 변화가 기체체류량 및 기-액 흐름특성에 미치는 영향을 규명하였다. 기체체류량은 용융염 온도가 상승함에 따라 증가하였는데, 이는 용융염 온도의 증가로 인해 용융된 탄산나트륨의 점도와 표면장력이 감소하였기 때문이다. 실험에서 얻어진 기체체류량 데이터를 drift-flux 모델에 적용하여 용융염반응기 내의 흐름특성을 규명할 수 있었으며, 이를 통해 흐름영역에 따른 기체체류량을 정확하게 예측할 수 있었다. Molten salt oxidation is one of the most promising alternatives to incineration that can be used to efficiently destroy the organic components of mixed wastes and hazardous wastes. In this study, the gas holdup and gas-liquid flow characteristics are investigated in the molten salt oxidation reactor (0.076 m D×0.653 m H.). Effects of input air velocity (0.05-0.22m/s ) and molten salt temperature (870-970℃) on the gas holdup and flow characteristics have been studied. Molten carbonate as the liquid phase and air as the gas phase have been used in this study. The gas holdup increases with increasing molten salt temperature due to the decrease of viscosity and surface tension of molten carbonate. The experimentally obtained gas holdups in the molten salt reactor have been well described and characterized by means of drift-flux model. The gas holdups with variation of the flow regime have been well predicted.
성인 지역사회 폐렴의 원인 미생물에 대한 전향적 다기관 연구 : Legionella, Leptospira, Hantaan virus and Orientia tsutsugamushi
김민자,정희진,손장욱,심희선,박대원,박승철,우준희,강재명,김유겸,신완식,김양리,이환종,김지희 대한감염학회 2001 감염 Vol.33 No.1
Background : Despite rigorous investigations, the etiology of community-acquired pneumonia remains unknown in about 50% of hospitalized patients. The diagnosis of the etiological agent is becoming more challenging and more critical as number of newer pathogens have been recognized in recent years. In the 3-year period prospective study we investigated adult patients with community-acquired pneumonia for Legionella, Leptospira, Hantaan virus and Orientia tsutsugamushi as potential etiologic agents. Methods : A prospective multicenter study was performed from May 1997 to April 2000. A total of 431 patients with community-acquired pneumonia under the inclusion criteria were examined for specific microbial diagnosis; sputum culture and PCR, and serologic teats including indirect immunofluorescence antibody (IFA) test for Legionella, and hemagglutination tests for Leptosoira, Hantaan virus and O. tsutsugamushi. Etiologic diagnosis was determined on the basis of the review of case record forms and specific laboratory diagnostic criteria. Results : During the study period a total of 385 sputum and 283 serum samples were examined. Legionella pneumonia was diagnosed in 2.3% (10/431) of the cases examined : 1.4% cases with PCR-positive (5/367) and 2.1% with positive IFA test (6/283). Leptospirosis and scrub typhus were diagnosed in 0.4% (1/252) and 2.0% (5/252), respectively. All 5 cases with scrub typhus occurred in late fall, and rash or eschar was not found. None of cases was Hantaan virus infection. Conclusion : The results suggest that Legionella, Leptospira, and O. tsutsugamushi should be considered in the etiologic diagnosis and empirical antibiotic therapy of community-acquired pneumonia. (Korean J Infect Dis 32:24∼31, 2001)