國內 無煙炭의 循環流動層 보일러에서 脫黃 特性 硏究

정진도,김장우,하준호 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.4

Circulating fluidized bed combustion (hereafter CFBC) technology enables an efficient combustion for the materials with low heating values such as high ash coal and sludges. It also has desulfation function by adding limestone directly to combustor. The CFBC has been considered as one of the best processes for low grade coal containing with large contents of ash and sulfur. In this paper, in order to various tests were performed to find the optimum desulfation condition for CFBC using Korean Anthracite. We surveyed possible parameters and conducted desulfation efficiency test in D Thermal Power Plant. In addition. the result of some fundamental theoretical consideration was discussed with CFBC. Optimum limestone size could be considered to be 0.1~0.3 mm irrespective of combustion temperature and Ca/S molar ratio variation. Desulfation efficiency increased as the molar ratio increased. Because desulfation process occurs at the surface at higher temperature. inner side of limestone can't be utilized. When surface area is not appropriate, some SO₂ emit without reaction. Optimum molar ratio should be decided after considering chemical and physical properties of limestone and coal thoroughly such as particle size, pore size and HGI. Commercial CFBC is operated at Ca/S 1.6. Combustor temperature 840~870℃ shows good desulfation efficiency.

다발성 골수종으로 이행한 단일형질세포종 1예

정재용,모성환,기장도,문철호,김창욱,전용준,박유환,정춘해,오윤경 조선의대 1995 The Medical Journal of Chosun University Vol.20 No.2

전류제어형 PWM컨버터를 이용한 동기발전기용 여자시스템에 관한 연구

장수진,류동균,서민성,김준호,원충연,이진국 성균관대학교 2003 학술회의지원논문목록집 Vol.2003 No.-

동기발전기 출력전압은 여자시스템의 계자전류 제어에 의해 일정하게 유지된다. 고주파 PWM 컨버터(전류제어모드 buck컨버더)형태의 여자시스템은 부하변동이 발생하였을 때 동기발전기의 계자전류를 제어하게 된다. 이 논문은 정상상태 및 과도상태에서의 안정화를 개선하기 위하여 여자시스템의 설계 및 실험에 대해 다루었다. 시뮬레이션 및 실험 결과는 제안된 여자시스템이 50kW 동기발전기의 DVR에 의해 응답시간이 개선되었음을 보여주었다. The output voltage of synchronous generator is regulated constantly by field current control in excitation system. High frequency PWM converter (current control mode buck conveter) type excitation system for synchronous generator is able to control exciter current when the load change happened. This paper deals with the design and evaluation of the excitation system for a synchronous generator to improve the steady state and transient stability. The simulation and experimental results show that the proposed excitation system is able to improve the response time by the DVR(digital voltage regulator) of 5O[kW] synchronous generator.

수용성 키틴이 백서 창상치유에 미치는 영향

강장석,조용남,정상훈,유 결,임진수,권 호,조용우,고석원 大韓成形外科學會 2001 Archives of Plastic Surgery Vol.28 No.1

키토산 구슬을 이용한 가토 연골세포의배양

장의찬,김경환,저호중,이기현,정상인,손태일 대한정형외과연구학회 2003 대한정형외과연구학회지 Vol.6 No.2

답손(Dapsone)중독환자의 예후와 특성 분석

장석준,정성필,김승환,구홍두,심호식 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1

We reviewed 26 dapsone intoxication patients who had visited Severance Hospital Emergency Care Center from January 1991 to January 1995 : 13 of them ingested intentionally, but the other ingested accidentally. Among the admitted patients the highest and lowtheest initial value of methemoglobin level is 59.6% & 10.1%. The frequency of symptoms at presentation was following 16 patients complained cyanosis of lip area, 10 patients complained dyspnea, 4 patients complained mental change, 4 patients complained vomiting, 2 patients complained nausea. The inital level of methemoglobin was less than 50% except in one patient. In the view points of total doses of methylene blue used, less than 100mg was used in 9 patients(34.6%) but in one case, amount of 6400mg was loaded. There were 5 patients(19.2%) in September & 4 patients (15.4%) in January. In respect of result, there were 13 discharged cases (50%) for symptom improvement, and 5 mortality cases(19.2%). The transferred cases from Gangwondo account 19 patients(73.1%). All of them is not directly emergency care center visiting patients but transferred patients from remotely located hospitals. Dapsone intoxication results in severe tissue hypoxic symptoms from malfunction of normal hemoglobin thus only with appropriate available doses of methylene blue & activated charcoal, good outcomes will be expected. If aggressive therapy such as hemodialysis is introduced in treatment of severe dapsone intoxication, the outcomes may be slightly improved better than in other supportive care cases.

Southern Blot Hybridization법을 이용한 악성 림프종의 면역유전형에 관한 연구

전호종,기근홍,김윤신,이미숙,이미자,장원재,장숙진,박영진,정춘해,정종훈,양성훈,이광민 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

Immunogenotyping using gene rearrangement analysis has emerged as a precise laboratory aid in the diagnosis and classification of malignant Iymphoid neoplasms. The lineage and clonality of the malignant Iymphoid neoplasms can be identified by the demonstration of rearrangements of antigen receptor genes of the immunoglobulin and T-cell receptor genes. The analysis of the gene rearrangements on the malignant Iymphoid neoplasms are also useful as a sensitive unique clonal markers to detect early recurrence in patients with malignant Iymphoid neoplasms after treatment. To analyze the sensitivity and specificity of gene rearrangements in the diagnosis of malignant Iymphoid neoplasms. 24 cases of malignat Iymphoma were examined by Southern blot hybridization using CTβ-T cell receptor β chain gene-DNA probe and JH-immunoglobulin heavy chain gene-DNA probe. The results of the immunogenotypings using Southern blot hybridization disclosed high correlation between the immunophenotyping using immunohistochemical stain with monoclonal antibodies (B-cell Iymphoma 84.2%. T-cell Iymphoma 75% ). The analysis of the gene rearrangement of the angioimmunoblastic lymphadenopathy(AILD) and unclassifiable Iymphoma using immunohistochemical stain could resolve the monoclonality and lineage . Rearranged bands to the CTβDNA probe were observed in one case out of 2 cases of AILD. One case of unclassifiable Iymphoma showed rearranged bands to the CTβ DNA probe. There were no rearrangements in reactive follicular Iymphoid hyperplasia and paracortical Iymphoid hyperplasia. In conclusion, DNA gene rearrangement study should be applied to differentiate the clonality and cell lineage in the malignant Iymphoma with indistinctive immunophenotype.

한국인 및 중국 한족 정신분열병 환자의 5-HT2A 수용체 유전자 -1438A/G 다형성

이장호,이광철,이승부,오용인,최영근,조아랑,정주호,장환일 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.1

Objectives : The purpose of the present study was to investigate the association between -1438A/G polymorphism of 5-HT2A receptor gene and schizophrenia in Korean and Han Chinese population. Methods : A sample of 184 Korean patients with schizophrenia and 96 Korean healthy normal controls and 96 Han Chinese patients with schizophrenia and 96 Han-Chinese healthy normal controls were genotyped for a single nucleotide polymorphism with in 5-HT2A receptor gene (promoter region, A-1438G) by Msp I Resthction Fragment Length Polymorphism (RFLP). Results : There was no difference in allelic frequencies and genotype frequencies of -1438A/G polymorphism between Korean schizophrenics and controls (p=0.13) and Han Chinese schizophrenics and controls (p=0.40). Also, -1438A/G Poly-morphism did not show ethnical difference between Korean and Han Chinese controls. The Scale for the Assessment of Negative Symptoms (SANS) scores showed no significant differences between genotypes of -1438A/G polymorphism in both of Korean and Han Chinese schizophrenics. Conclusion : These results suggest that -1438A/G polymorphism of the 5-HT2A receptor gene is not causally related to the development of schizophrenia in Korean and Han Chinese population, and there no ethnic difference between Korean and Han Chinese population.

韓國人 戰傷患者의 下顎骨 損傷 樣相

孫章鎬,鄭雲夏 慶北大學校 齒科大學 1984 慶北齒大論文集 Vol.1 No.1

The purpose of this study is to research the mandibular injuries on war-patients in Korea. Making the 116 patients with the mandibular injuries who came to the Dept.of Dentistry of Korea Veterans Hospital from January in 1979 to september in 1982 an object of this study, using the radiographs and patient records. Following results were obtained; 116 war-patients with the mandiblar injuries showed mandibular bony defects (70.7%) had higher frequency than mandibular fractures. Average number of fractue lines of mandible patients were 1.9 lines, and mandibular body the highest frequency. (36.6%) According to the type of fracture , single fracture showed the frequency fo 59.0%, and multiple and comminuted fracture showed the frequency of 41.0%. Among these, unilateral fractures(73.8%) showed the frequency as about 3 times as bilateral fractures (26.2%). Among the cases of mandibular bony defects, partial bony defects were 53.7%. In this bony defects, mandibular angle region (31.8%) showed the highest frequency. Among the cases of mandibular bony defects, sectional bony defects were 46.3%, and the region between the mandibular midline and the first molar showed the highest frequency, and unilateral sectional bony befects showed higher frequency as 1.7 times as bilateral sectional bony defects.

만성 호중구성 백혈병 1례

기장도,박치영,류보열,김태종,모성환,곽재정,문철호,박근홍,박유환,정춘해 朝鮮大學校 附設 醫學硏究所 1996 The Medical Journal of Chosun University Vol.21 No.1

Chronic neutrophilic leukemia is a very rare myeloproliferative disorder which is characterized by severe sustained mature neutrophilic leukocytosis in peripheral blood (PB), hepatosplenomegaly, elevated leukocyte alkaline phosphatase, serum uric acid. serun viatmin B 12 and the bleeding tendency despite normal platelet count and coagulation time, absence of philadelphia chromosome, and the absence of fever or underlying infection or disease sufficient to mimic a leukemoid reaction. We have experienced a 34-years-old male patient with atypical chronic neutrophilic leukemia. On admission, the leukocyte count was 56,860/uL. severe neutrophic leukocytosis with 76% neutrophils and rare immature forms on PB smear. Many neutrophils had toxic granules, and vacuoloes. Leukocyte alkaline phosphatase score was decreased. The cytogenetic study showed Philadelphia chromosome negative with normal karyotype.