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김곤호,김건우,김영우,최영도,김종식,김상진,한승희,홍문표 漢陽大學校 工學技術硏究所 1998 工學技術論文集 Vol.7 No.1
Abstract- In a plasma source ion implantation, the target is successively biased by negative voltage pulses with an intrinsic finite rise time, resulting in the time-dependent sheath formation around the target. Measurement of time-dependent sheath during the pulse rise show the ion matrix sheath development which is in proportion to square root of time and pulse rise rate over plasma density but independent of the ion mass.
Epstein-Barr 바이러스 형질전환법을 이용한 파상풍 톡소이드에 대한 사람 단세포군 항체의 생산
유승민,조정제,호순태,하윤문 大韓免疫學會 1993 大韓免疫學會誌 Vol.15 No.-
For production of tetanus toxoid(TT) specific human monoclonal antibodies, anti-TT antibody secreting peripheral B lymphocytes were separated by rosetting with TT-coated SRBC. And, B lymphoblastoid cell line(BLCL) was established by Epstein-Barr Virus(EBV) transformation methods. Stable BLCLs were established after three times of cloning by limiting dilution. To establish the maximal antibody producing condition, several environmental factors were tested. The optimal condition for maximum antibody prodiction was 4 day culture of 1 x 105cells/ml concentration in RPMI 1640 complete culture media supplemented with 20% fetal calf serum, and the maximum concentration of secreted antibody was about 900ng/ml. The antibody production of BLCL was decreased during long-term culture after establishment of cell line, but antibody production was maintained by repeated cloning by limiting dilution.
송승찬,신진호,강석우,박경남,최호순,박근태,문희식,기춘석,이성희,윤병철,노우균,조균석,이민호 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.3
Tetrodotoxin is a neurotoxin produced by about 90 species of puffer fish and causes paralysis of central nervous system and peripheral nerves by blocking the movement of all monovalent cation. Ingestion of tetrodotoxin produces clinical manifestations such as paresthesias(within 10-45 min), vomiting, lightheadedness, salivation, muscle twitching, dysphagia, difficulty in speaking, convulsion and death that expressed by cardiopulmonary arrest with loss of brain stem reflex sometimes. Tetrodotoxin prevents or delays ischemia induced neuronal death by way of following 3 mechanisms. Firstly, it reduces the energy demand of the brain tissues. Secondly, it delays or even prevents anoxic depolarization. Finally, it deminishes ischemia induced cell swelling and cerebral edema. We report a case of puffer fish poisoning which presented with cardiopulmonary arrest and loss of brain stem reflex, but completely recovered by aggressive cardiopulmonary resuscitation.
이승호,이성훈,김기영,김창룡,박문성,류선열,조규승 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4
Carcinoma of the mouth accounts for approximately 5% of all carcinomas occurring in man. Carcinoma of the oral cavity develops as a result of invasion of malignant epithelial cells through the normally intact basal cell layer into subcutaneous and submucosal tissuse. The sofe palate and uvula may be involved in oral cancer but are not common sites. Early lesions of soft palate carcinoma appear as red, white, or mixed changes in the mucosa. The earliest symptom is mild sore throat. Advanced lesions interfer with swallowing and may cause a voice change. Although surgical method of soft palate carcinoma is successful, prognosis is relatively poor to swallowing and speech problem. Occasionally marginal recurrence may be developed. This article reports a case of squamous cell carcinoma occurred unusually in the soft palate and uvula. The case was treated with neoadjuvant chemotherapy, local radicalexcision and postoperative irradiation. Patient was followed up for 2 years. There was no tumor recurrence. The overall result including function was satisfactory.
이승호,정종철,김건중,정주성,유선열,박문성,김창룡 大韓顎顔面成形再建外科學會 1996 Maxillofacial Plastic Reconstructive Surgery Vol.18 No.4
Odontogenic infections are usually locally confined, self-limiting processes. However, under certain circumstances, they may break through the bony, muscular, and mucosal barriers and spread into contiguous fascial spaces or planes far from the initial site of involvement, resulting in severn life-threatening complications, such as retropharyngeal spread, suppurative mediastinal extension, airway obstruction, pleuropulmonary suppuration, and hematogenous dissemination to distant organs. The mortality arte for mediastinitis from odontogenic infection ranges from 40% to 60%. Therefore rapid evalution and treatment is essential with a combination of life support, antibiotic therapy, and surgical intervention. Recently, we experienced three cases of retropharyngeal and mediastinal abscesses secondary to odonogenic infections. In all patients, early diagnosis was possible by CT scanning and physical examination. The prognosis was good in all patients by using urgent aggressive surgical and antibiotic therapy.
Vinblastine이 백서 배양 Type-1 별아교세포에 미치는 세포독성에 관한 연구
하상호,박승택,문연자,김종영,김정중,정연태 圓光大學校 醫科學硏究所 1994 圓光醫科學 Vol.10 No.1-2
It has been reported that vinblastine, anticancer drug, is a neuroteratogen inducing various neural malformations such as microcephaly and neural tube defect(NTD), but the study on the toxicity of neuroglial cells, especially type-1 astrocytes using culture system is not well established. In order to evaluate the cytotoxicity of vinblastine on cultured type-1 astrocytes of neonatal rat brain in vitro. MTT assay and also light and electron microscopic studies were carried out. The results were as follows: 1. MTT_90 and MTT_50 in cultured type-1 astrocytes were 1×10 exp (-1) μM and 1×10 exp (2)μM of vinblastine, respectively. 2. Vinblastine was highly toxic in cultured type-1 astrocytes(MTT_50 ≤ 100 μM). 3. In a light microscopy, cultured type-1 astrocytes showed decrease of cells in number, cytoplasmic perforation, vacuolization and cytoplasmic granulation after cultured type-1 astrocytes were treated with 1×10 exp (2)μM of vinblastine for 24 hours. Cultured type-1 astrocytes damaged by vinblastine showed degenerative changes of cells morphologically. 4. In an electron microscopy, increment of glial fibrillary acidic protein(GFAP), increased free-ribosomes, cisternal dilatation of rough endoplasmic reticulum (rER). few dense bodies and vacuoles were shown in cultured type-1 astrocytes treated with 1×10 exp (2)μM of vinblastine for 24 hours. The results indicate that vinblastine has markedly cytotoxic effect on the type-1 astrocytes of neonatal rat brain in vitro study.
APCVD법을 사용한 보론 포스파이드의 증착 및 특성에 관한 연구
김순영,문병필,윤여철,전호승,김철주 서울시립대학교정보기술연구소 2001 정보기술연구소 논문집 Vol.3 No.-
Boron Phosphide films were deposited on the glass substrate at the low temperature, 550℃, by the reaction of B₂H_6 with PH₃ using CVD. N₂ was employed as carrier gas. The reactant gas rates were 50 ㎖/min for B₂H_6, 50 ㎖/min for PH₃ and 1.5ℓ/min for N₂. The films were annealed for 1hour, 3hours in N₂ambient at 550℃. The deposition rate was 1000Å/min and the refractive index of film was 2.6. The measurement of XRD shows that the films have the preferred orientation of (1 0 1). The data of VIS spectrophotometer show 75.49% for as-deposited, 76.71% for 1hr-annealed and 86.4 % for 3 hrs-annealed. The data of AFM show 73Å for as-deposited, 88.9Å for 1hr-annealed and 220Å for 3hrs-annealed. Also, The data of the secondary electron emission rate(γ) s how 0.317 for as -deposited, 0.357 for 1hr-annealed and 0.537 for 3hrs-annealed. And, The film shows the surface deposited thin film, bu using FT-IR, has the O-H bond and this bond is greatly decreased as annealing.
인장력을 받는 ㄱ형강 접합부의 감소계수 U값에 관한 연구
표영석,윤성호,나승욱,신영록,김보영,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2(구조계)
This study focuses on the inspect of effective net area design code, according to limited state design criteria of steel structures, recently established in Korea, by an experiment on the joint of angle tension members on the ground. reduction factor. The methods of this study were to compare other study results on effective net area rupture mode and ultimate capacity, and to evaluate the propriety of the criteria design code. The result is that code in force limited state design criteria of steel structures and AISC-LRFD joint of angle tension members predicted load and experiment depend on ultimate capacity difference. Therefore, it is thought that there is need for supplemental test and study to effective net area of tension joint focused on bolted connection of angle.