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부산지역 무균성 뇌막염 원인 바이러스의 분리 및 동정 : 1998년을 중심으로
김영희,정영기,김기순,지영미,윤재득,김병준,구평태,민상기,정구영,김만수,조경순 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1
The incidence of aseptic meningitis infection is ensuing and threatening the health of children. Enteroviruses are the major agents of aseptic meningitis and identification of virus has been a clue to diagnosis and epidemiology. The outbreak of aseptic meningitis occurred in Pusan, 1998. Patients were concentrated from April through November. Children were more susceptible than adults. Among 306 cases of specimens from stool, throat swab tested, only 7.2% were positive on virus isolation, 12 cases from stool and 10 from throat, respectively. All isolated 7 serotypes of viruses represented cytopathic effect on cultured cells. Three types of echovirus 6, 25, 30 and coxsackievirus B2, B3, B4, B6 were identified by neutralizing anti body test. Isolated coxsackievirus and echovirus were observed by an electron microscope with negative staining.
황금(Scutellaria baicalensis)의 열수 추출물이 병원성 세균에 미치는 항균활성
김은님,백종윤,김용현,한만덕 순천향대학교 기초과학연구소 2008 순천향자연과학연구 논문집 Vol.14 No.1
This study was investigated antibacterial activity of aqueous fractions from ScuteItaria baicalensis against various pathogenic bacteria. Extracts were obtained from the roots of 5. baicatensis which has shown selective antibactehal effects on various strains of bacteria. The aqueous extract of S. baicatensis was tested on 19 species of human pathogenic bacteria. The bacteria were cultured in nutrient broth, and YM broth then incubated aerobically at 37℃ for 18-24 hours. Antimicrobial activities tested by paper disc and radial diffusion assay methods. The aqueous extracts of 5. baicatensis inhibited the growth of most human pathogenic bacterial and showed 62.5㎎/㎖ of MIC values against StaphyIococcus aureus SG511 and 125㎎ /㎖ of MIC values against Staphytococcus aureus 285 and Staphylococcus aureus 503. These results suggest that S. baicaIensis extract can be used as an effective natural antibiotics.
계면적을 고려한 형상기억합금 Fiber 금속기 복합재료의 기계적 거동해석
안득만,김동현 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-
본 논문에서는 matrix와 fiber간의 계면적을 고려한 형상기억합금 fiber 알루미늄 복합재료의 강화기구가 연구되었다. 형상기억효과에 의해 기지재료의 축방향 압축잔류응력으로부터 복합재료의 인장성질이 강화된다. TiNi 연속섬유 Al 복합재료의 거동해석에 있어서 잔류응력과 계면적을 고려한 혼합법칙과 계면적을 고려한 Eshelby형태의 모델을 이용하여 복합재료의 강화기구를 설명할수 있는 모델을 제안하였다. 이 모델을 이용하여 실험에서 확인된 fiber와 matrix사이의 계면적에 따른 항복응력의 변화를 설명할 수 있었다. In this paper, strengthening mechanism of shape memory alloy fiber metal matrix composite considering interface area were studied. The tensile property of the composite material is strengthened from the compressive residual stress of the longitudinal direction due to shape memory effect. In analyzing the behavior of TiNi continuous fiber-Al composite, a law of mixture and Eshelby type model considering residual stress and interface area were introduced. From these models, we can explain the variation of tensile yield stress due to interface area.
영지 (Ganoderma lucidum) 자실체 다당류의 분자량에 따른 생리활성
한만덕;김용현;이현수;권현정;전미애;한국일 순천향대학교 기초과학연구소 2010 순천향자연과학연구 논문집 Vol.16 No.2
The study was conducted to investigate the biological activities of an protein-bound polysaccharide (GLP) isolated from the fruit body of Ganoderma lucidum. GLP was extracted by hot water and then it was purified high (GLP-HM) and low (GLP-LM) molecular weight fraction by ethanol precipitation. Both of GLP-HM and GLP-LM at doses of 20 mg/kg in vivo had the ability to inhibit the tumor growth of Sarcoma 180 tumor-bearing mice. Inhibition rates of tumor (%) were inhibited 60.6% and 38.7% by GLP-HM and GLP-LM, respectively. In assay of anti-complementary activity in vitro, the GLP-HM were higher than that of the GLP-LM polysaccharide. And also, the GLP-HM enhanced nitric oxide production of mouse bone marrow cells. When the GLP-HM was injected intraperitoneally in tumor-bearing mouse at doses of 20 mg/kg, the concentration of TNF-α in vivo was 140.9 pg/ml in the serum, 269.6 pg/ml in sarcoma tumor mass and 879.4 pg/ml in liver. This study shows that the high molecular polysaccharide from mushroom can enhance more the bioactivities than that of the low molecular polysaccharide.
Deuk-Man Kim,Seok-Ju Hwang,Cheon-Woo Kim 한국방사성폐기물학회 2022 한국방사성폐기물학회 학술논문요약집 Vol.20 No.1
The off-site dose calculation is regularly carried out at the nuclear power plants in order to evaluate off-site dose from gaseous and liquid effluent during normal operation. In 2009, the off-site calculation program (K-DOSE60) was developed in accordance with ICRP-60 by KHNP. This software needs meteorological data, gaseous and liquid effluent data, and various other input parameters to evaluate off-site dose. As a result, it takes a certain amount of time for the user to enter accurate input data and verify calculated results, and it is difficult to intuitively determine them because of providing textbased calculated results. Therefore, in this study, the improvement of the calculation program was considered so that a more reliable and effective evaluation could be performed when calculating the off-site dose. The main improvements of the off-site dose calculation program (ODCP) are as follows. First, it is developed as the network-based program to link with meteorological data, and gaseous and liquid effluent data to remove input errors and simplify data transfer. Second, through validation process of input data, input errors are eliminated. Third, the input data and calculated results are visually provided so that the user can easily determine the evaluation results. Fourth, database of input and calculated results is constructed to facilitate evaluation result history management.
Design of Control System of Vitrification Facility
Deuk-Man Kim,Seok-Ju Hwang,Jung-Kwon Son 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
A vitrification facility control area is formed to control and monitor the vitrification facility process, and the control system is designed to manage the vitrification facility more safely and effectively. The control system is largely composed of a process control system and an off-gas monitoring system. The process control system is operated so that operation variables can be maintained in a normal state even in normal and transient conditions, and is designed so that the vitrification facility can be stably maintained in the event of an abnormality in the facility. The process control system consists of Programmable Logic Controller (PLC) and Local Control Panel (LCP), which controls and monitors each unit device. In addition, operation variables are provided to the operator so that the operator can manage operation variables during process control in a centralized manner for the operation of the vitrification facility. The off-gas monitoring system is operated to monitor whether the off-gas discharged to the environment is stably maintained within the standard level, and the off-gas is monitored through an independent monitoring system.
Design of Cooling Water System of Vitrification Facility
Deuk-Man Kim,Seok-Ju Hwang,Jung-Kwon Son 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
After melting glass at a high temperature of about 1,100 degrees in the Cold Crucible Induction Melter (CCIM) of the vitrification facility, radioactive waste is fed into the CCIM to vitrify radioactive waste. Accordingly, since the metal sector of the CCIM contacts the high-temperature molten glass, cooling water is supplied to continuously cool the metal sector. The cooling system is divided into primary and secondary cooling water systems. The primary cooling water flows inside the metal sector of the CCIM to maintain the metal sector within normal temperature, thereby forming a glass layer between the metal sector and the high-temperature melting glass. The secondary cooling system is a system that cools the primary cooling water that cools the metal sector, and removes heat generated from the primary cooling system. In addition, it is designed to stably supply cooling water to the secondary cooling water system through an emergency cooling water system so that cooling water can be stably supplied to the secondary cooling water system in the event of secondary cooling water loss. Therefore, it is designed to maintain the facility stably in the event of loss of cooling water for the CCIM of the vitrification facility.
Ergotamine-Induced Upper Extremity Ischemia: A Case Report
Man Deuk Kim,이건,신성욱 대한영상의학회 2005 Korean Journal of Radiology Vol.6 No.2
Ergotamine-induced limb ischemia is an extremely rare case. We present a case of a 64-year-old man, who developed ischemia on the right upper extremity due to long-term use of Ergot for migraine headache. Angiography revealed diffused, smooth, and tapered narrowing of the brachial artery. The patient was successfully treated with intravenous nitroprusside.